From ac6e4f4b7507f806ffa28f6555fb0cba8b2dabcc Mon Sep 17 00:00:00 2001 From: ryan Date: Thu, 13 Aug 2026 02:55:33 +0000 Subject: [PATCH 01/11] feat(core): context-aware comment adjudication with structural AST extraction MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Each detected comment now carries the structural context of the code it annotates, and the classifier's judgements are constrained by it. ## Detection (src/detect.rs) `CommentContext` records the annotated code, whether that code is a declaration, the scope (module/function/nested-block), the position role (docstring-head/leading/trailing/inline), and whether the context is reliable. Python docstrings are found by walking the tree rather than by a tree-sitter query. The bundled grammar makes a docstring a direct `string` child of `module`/`block` with no `expression_statement` wrapper, so the query matched nothing and Python docstrings were never detected at all. The walk accepts both shapes. The walk no longer descends into comment nodes. tree-sitter-rust nests a marker-stripped content node inside `///`, which was emitted as a second, phantom comment whose adjacent code was `"/"`. Adjacent code is the code the comment annotates: the next non-comment sibling for a leading or head comment, the previous one for a trailing or inline comment. It was previously taken from the previous sibling in all cases, so a Go doc comment reported `package main` instead of the function it documents. A comment is a docstring head only when nothing but trivia precedes it in its body — a doc comment on a class's second member is a leading comment. The file root counts as a head slot, so module docstrings are recognised. `PositionRole::DocstringHead` is positional only: a `#` line comment first in a file occupies the slot without being a docstring, and the `comment_type == Docstring` gate in the public-contract rule is what keeps that safe. ## Classification (src/classify.rs) `restates_adjacent` scores how much of a comment's vocabulary already appears in the code it annotates. Structural context can only *narrow* a judgement, never widen it: a docstring is a public contract when it carries contract markup AND is positioned as one (head slot, or leading a declaration) AND does not merely echo that declaration. Position alone must never justify — the corpus labels a bare summary line (`"""Fetch the user."""`) a restatement, and an earlier draft of this rule contradicted that. Commented-out code now recognises assignment shape (`x = x + 1`), which single `=` did not previously match. The check is deliberately narrow: the left side must be one identifier path, so `set retries = 3 because …` and the legend `1 = enabled, 2 = disabled` are not mistaken for code. Edit/MultiEdit fragments are marked unreliable, and an unreliable catch-all `RestatesCode` is downgraded to `Justified(NonObviousIntent)`. Fragment edges lose adjacent context, so only a concrete rule may convict there; the `Write` path is unaffected. ## Measurement (eval/corpus.json, tests/) `eval/corpus.json` is the single source of truth, carrying a `kind` per case; the binary label is derived from it. The gate reports per-kind and per-language precision/recall and asserts a per-kind precision floor, so a weak kind cannot hide inside the aggregate. `every_case_is_detectable_end_to_end` and `detected_path_reaches_f1_threshold` run all 50 cases through the real parse → detect → classify path. The text-only gate cannot see detector defects; this one fails when detection breaks. It immediately found a corpus data bug: two cases carried `language: "python"` with `//` text, which is not a Python comment. Corrected to rust and javascript. `tests/context.rs` pins the derived context per grammar — every case there is a defect that shipped once. `.cargo/config.toml` is committed because it is load-bearing: `tree-sitter-language-pack` is declared with `default-features = false`, so every grammar comes from `TSLP_LANGUAGES`. Without it CI compiles zero grammars and detection silently returns nothing. ## Verification cargo fmt --check clean cargo clippy --all-targets -D warns clean cargo test --all-targets 58 passed (37 classify, 9 context, 3 f1, 9 pipeline) cargo mutants (src/classify.rs) 59 caught / 4 unviable / 0 missed Detected-path per-kind precision: 48/50 cases kind-exact; the two remaining are binary-label-equivalent (`// ref: https://…` scores NonObviousIntent over Attribution). The CI mutation step's path is corrected to the crate's real location. --- .cargo/config.toml | 6 + .github/workflows/ci.yml | 57 + .gitignore | 8 + Cargo.lock | 1541 +++++++++++++++++ Cargo.toml | 25 + crates/comment-checker/Cargo.toml | 33 + crates/comment-checker/src/check.rs | 106 ++ crates/comment-checker/src/classify.rs | 469 +++++ crates/comment-checker/src/comment.rs | 140 ++ crates/comment-checker/src/detect.rs | 384 ++++ crates/comment-checker/src/hook.rs | 43 + crates/comment-checker/src/language.rs | 76 + crates/comment-checker/src/lib.rs | 24 + crates/comment-checker/src/main.rs | 33 + crates/comment-checker/src/report.rs | 58 + crates/comment-checker/tests/classify.rs | 652 +++++++ crates/comment-checker/tests/common/mod.rs | 255 +++ crates/comment-checker/tests/context.rs | 138 ++ crates/comment-checker/tests/f1.rs | 137 ++ crates/comment-checker/tests/pipeline.rs | 73 + ...002-feat-sota-comment-adjudication-plan.md | 282 +++ eval/corpus.json | 52 + 22 files changed, 4592 insertions(+) create mode 100644 .cargo/config.toml create mode 100644 .github/workflows/ci.yml create mode 100644 .gitignore create mode 100644 Cargo.lock create mode 100644 Cargo.toml create mode 100644 crates/comment-checker/Cargo.toml create mode 100644 crates/comment-checker/src/check.rs create mode 100644 crates/comment-checker/src/classify.rs create mode 100644 crates/comment-checker/src/comment.rs create mode 100644 crates/comment-checker/src/detect.rs create mode 100644 crates/comment-checker/src/hook.rs create mode 100644 crates/comment-checker/src/language.rs create mode 100644 crates/comment-checker/src/lib.rs create mode 100644 crates/comment-checker/src/main.rs create mode 100644 crates/comment-checker/src/report.rs create mode 100644 crates/comment-checker/tests/classify.rs create mode 100644 crates/comment-checker/tests/common/mod.rs create mode 100644 crates/comment-checker/tests/context.rs create mode 100644 crates/comment-checker/tests/f1.rs create mode 100644 crates/comment-checker/tests/pipeline.rs create mode 100644 docs/plans/2026-08-12-002-feat-sota-comment-adjudication-plan.md create mode 100644 eval/corpus.json diff --git a/.cargo/config.toml b/.cargo/config.toml new file mode 100644 index 0000000..2e338bd --- /dev/null +++ b/.cargo/config.toml @@ -0,0 +1,6 @@ +# Statically compile exactly the grammars this tool supports, at one +# tree-sitter version. No runtime download, no dynamic loading — the binary +# is self-contained and works offline (and inside a bubblewrap sandbox). +[env] +TSLP_LANGUAGES = "python,javascript,typescript,tsx,go,rust,c,cpp,java,kotlin,scala,ruby,php,swift,csharp,elixir,bash,lua,sql,json,yaml,toml,html,css,dockerfile,hcl,markdown,r,dart,zig,haskell,ocaml,svelte,elm,groovy,cue,proto" +TSLP_LINK_MODE = "static" diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml new file mode 100644 index 0000000..60f5fe1 --- /dev/null +++ b/.github/workflows/ci.yml @@ -0,0 +1,57 @@ +name: CI + +on: + push: + branches: [main] + pull_request: + +jobs: + gate: + runs-on: ubuntu-latest + steps: + - uses: actions/checkout@v4 + + - uses: dtolnay/rust-toolchain@stable + with: + components: rustfmt, clippy + + - name: Cache cargo + uses: actions/cache@v4 + with: + path: | + ~/.cargo/registry + ~/.cargo/git + target + key: ${{ runner.os }}-cargo-${{ hashFiles('Cargo.lock') }} + + - name: Format check + run: cargo fmt 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"https://github.com/systemfsoftware/claude-code-comment-checker" + +[workspace.lints.rust] +unsafe_code = "deny" + +[workspace.lints.clippy] +all = { level = "deny", priority = -1 } +pedantic = { level = "warn", priority = -1 } + +[profile.release] +opt-level = 3 +lto = "fat" +codegen-units = 1 +strip = "symbols" +panic = "abort" \ No newline at end of file diff --git a/crates/comment-checker/Cargo.toml b/crates/comment-checker/Cargo.toml new file mode 100644 index 0000000..45c474a --- /dev/null +++ b/crates/comment-checker/Cargo.toml @@ -0,0 +1,33 @@ +[package] +name = "claude-code-comment-checker" +version = "0.1.0" +edition = "2024" +rust-version = "1.85" +license = "Apache-2.0" +description = "Comment checker hook for Claude Code — flags genuinely unnecessary comments, spares justified ones" +repository = "https://github.com/systemfsoftware/claude-code-comment-checker" +keywords = ["comments", "tree-sitter", "claude-code", "hook"] +categories = ["command-line-utilities", "development-tools"] + +[lib] +name = "claude_code_comment_checker" +path = "src/lib.rs" + +[[bin]] +name = "comment-checker" +path = "src/main.rs" + +[dependencies] +clap = { version = "4", features = ["derive"] } +serde = { version = "1", features = ["derive"] } +serde_json = "1" +tree-sitter = "0.26" +tree-sitter-language-pack = { version = "1.14", default-features = false } + +[dev-dependencies] +proptest = "1" +serde = { version = "1", features = ["derive"] } +serde_json = "1" + +[lints] +workspace = true diff --git a/crates/comment-checker/src/check.rs b/crates/comment-checker/src/check.rs new file mode 100644 index 0000000..225ac62 --- /dev/null +++ b/crates/comment-checker/src/check.rs @@ -0,0 +1,106 @@ +//! The check use case: decode → detect → classify → report (all pure). + +use crate::Verdict; +use crate::classify::classify; +use crate::comment::Comment; +use crate::detect::detect_comments; +use crate::hook::{HookInput, decode}; +use crate::report::{Flagged, format_report}; + +/// The outcome of a hook check: pass (with a note) or block (with a report). +#[derive(Debug, Eq, PartialEq)] +pub enum Outcome { + Pass { note: String }, + Block { report: String }, +} + +/// Run the check over the raw hook JSON. +#[must_use] +pub fn check(input: &str, custom_prompt: &str) -> Outcome { + let Some(hook) = decode(input) else { + return pass("Invalid input format"); + }; + let file_path = hook.tool_input.file_path.as_str(); + if file_path.is_empty() { + return pass("No file path provided"); + } + + let comments = detect_for(&hook, file_path); + let flagged = flag_unnecessary(&comments); + if flagged.is_empty() { + return pass("No unnecessary comments found"); + } + + Outcome::Block { + report: format_report(&flagged, file_path, custom_prompt), + } +} + +/// The content a tool writes, and for edits only the newly-added comments. +fn detect_for(hook: &HookInput, file_path: &str) -> Vec { + match hook.tool_name.as_str() { + "Edit" => new_comments( + &hook.tool_input.old_string, + &hook.tool_input.new_string, + file_path, + ), + "MultiEdit" => hook + .tool_input + .edits + .iter() + .flat_map(|edit| new_comments(&edit.old_string, &edit.new_string, file_path)) + .collect(), + "Write" => detect_comments(&hook.tool_input.content, file_path), + _ if !hook.tool_input.content.is_empty() => { + detect_comments(&hook.tool_input.content, file_path) + } + _ => detect_comments(&hook.tool_input.new_string, file_path), + } +} + +/// Comments present in `new` but not in `old`, by normalized text. +fn new_comments(old: &str, new: &str, file_path: &str) -> Vec { + let old_texts: Vec = detect_comments(old, file_path) + .into_iter() + .map(|comment| normalize(&comment)) + .collect(); + detect_comments(new, file_path) + .into_iter() + .filter(|comment| !old_texts.contains(&normalize(comment))) + .map(mark_unreliable) + .collect() +} + +/// Mark a comment's context as unreliable — the fragment edge of an Edit or +/// `MultiEdit` may have lost adjacent-code context, so the verifier must +/// fall back from restate detection rather than convict. +fn mark_unreliable(mut comment: Comment) -> Comment { + if let Some(ctx) = comment.context.as_mut() { + ctx.unreliable = true; + } + comment +} + +fn normalize(comment: &Comment) -> String { + comment.text.trim().to_ascii_lowercase() +} + +/// Keep only the comments the classifier marks unnecessary. +fn flag_unnecessary(comments: &[Comment]) -> Vec> { + comments + .iter() + .filter_map(|comment| match classify(comment) { + Verdict::Unnecessary { reason } => Some(Flagged { + comment, + kind: reason, + }), + Verdict::Justified { .. } => None, + }) + .collect() +} + +fn pass(note: &str) -> Outcome { + Outcome::Pass { + note: format!("[check-comments] Skipping: {note}\n"), + } +} diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs new file mode 100644 index 0000000..cb6f68d --- /dev/null +++ b/crates/comment-checker/src/classify.rs @@ -0,0 +1,469 @@ +//! The pure classification core: one comment in, one verdict out. +//! +//! No I/O, no clock, no randomness, no branches — the decision is a fold over +//! ordered rule tables (CONST-P1, CONST-P2). + +use crate::comment::{Comment, CommentType, Justification, PositionRole, UnnecessaryKind, Verdict}; + +/// A classification rule: the reason it assigns and the predicate that +/// recognises it. Predicates receive the comment's trimmed, lowercased text as +/// their first argument and the full [`Comment`] for fields the text cannot +/// carry (line number, comment type). +struct Rule { + reason: R, + matches: fn(&str, &Comment) -> bool, +} + +/// Rules that justify keeping a comment, in priority order. +static JUSTIFIED: &[Rule] = &[ + Rule { + reason: Justification::Shebang, + matches: is_shebang, + }, + Rule { + reason: Justification::LicenseHeader, + matches: is_license, + }, + Rule { + reason: Justification::GeneratedFile, + matches: is_generated_file, + }, + Rule { + reason: Justification::LinterDirective, + matches: is_directive, + }, + Rule { + reason: Justification::BddStep, + matches: is_bdd, + }, + Rule { + reason: Justification::PublicApiDoc, + matches: is_public_api_doc, + }, + Rule { + reason: Justification::NonObviousIntent, + matches: is_non_obvious_intent, + }, + Rule { + reason: Justification::Attribution, + matches: is_attribution, + }, +]; + +/// Rules that mark a comment unnecessary, in priority order. +static UNNECESSARY: &[Rule] = &[ + Rule { + reason: UnnecessaryKind::AgentMemo, + matches: is_agent_memo, + }, + Rule { + reason: UnnecessaryKind::CommentedOutCode, + matches: is_commented_out_code, + }, + Rule { + reason: UnnecessaryKind::VacuousTodo, + matches: is_vacuous_todo, + }, +]; + +/// Classify a comment: the first matching justification wins; failing that, +/// the first matching unnecessary-kind; failing that, the comment merely +/// restates the code and is unnecessary. +#[must_use] +pub fn classify(comment: &Comment) -> Verdict { + let text = comment.text.trim().to_ascii_lowercase(); + let verdict = JUSTIFIED + .iter() + .find(|rule| (rule.matches)(text.as_str(), comment)) + .map(|rule| Verdict::Justified { + reason: rule.reason, + }) + .or_else(|| { + UNNECESSARY + .iter() + .find(|rule| (rule.matches)(text.as_str(), comment)) + .map(|rule| Verdict::Unnecessary { + reason: rule.reason, + }) + }) + .unwrap_or(Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode, + }); + // Conservative downgrade: when a comment's structural context is unreliable + // (Edit/MultiEdit fragment edge) the catch-all RestatesCode path is too + // aggressive. Use a high-confidence justification instead — PreferDontConvict. + if is_unreliable_fallback(&verdict) && comment.context.as_ref().is_some_and(|c| c.unreliable) { + return Verdict::Justified { + reason: Justification::NonObviousIntent, + }; + } + verdict +} + +const fn is_unreliable_fallback(verdict: &Verdict) -> bool { + matches!( + verdict, + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode + } + ) +} + +/// True when the comment's content-bearing vocabulary is mostly contained in +/// the adjacent code's: at least half of the comment's content tokens also +/// appear among the adjacent code's content tokens. +#[must_use] +pub fn restates_adjacent(comment: &Comment) -> bool { + let Some(adjacent) = comment + .context + .as_ref() + .and_then(|c| c.adjacent_code.as_ref()) + else { + return false; + }; + let comment_tokens = content_tokens(&comment.text); + let adjacent_tokens = content_tokens(adjacent); + let intersection = comment_tokens + .iter() + .filter(|t| adjacent_tokens.contains(*t)) + .count(); + // `comment_tokens` is guaranteed non-empty by `content_tokens` dropping + // stop-words/markers only when caller text has none; empty → 0 < 0.5. + let containment = f64::from(u32::try_from(intersection).unwrap_or(0)) + / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)); + containment >= 0.5 +} + +/// English stop-words stripped from content tokens. Compiled separately to +/// keep [`content_tokens`] readable. +const STOP_WORDS: &[&str] = &[ + "the", "a", "an", "of", "to", "in", "is", "it", "for", "on", "and", "or", "with", "this", + "that", "these", "those", "as", "by", "be", "are", "was", "but", "not", "no", +]; + +/// The set of content-bearing tokens in `text`. Splits on whitespace and +/// punctuation, lower-cases, strips comment markers and English stop-words. +/// Returns owned strings so callers can decide lifetime. +#[must_use] +pub fn content_tokens(text: &str) -> std::collections::HashSet { + let stripped = strip_comment_marker(text).trim().to_ascii_lowercase(); + stripped + .split(|c: char| !c.is_alphanumeric() && c != '_') + .filter(|s| !s.is_empty() && !STOP_WORDS.contains(s)) + .map(str::to_owned) + .collect() +} + +const COMMENT_MARKERS: &[&str] = &["//", "/*", "#", "--", "*"]; + +/// Strip one leading comment marker and trim leading whitespace. +fn strip_comment_marker(text: &str) -> &str { + COMMENT_MARKERS + .iter() + .find_map(|marker| text.strip_prefix(marker)) + .map_or(text, str::trim_start) +} + +/// Strip one leading comment marker and any leading whitespace after it. +/// +/// `strip_comment_marker` alone trims only when a marker matched; this also +/// drops blank margin when the text had no marker. +fn stripped_after_marker(text: &str) -> &str { + strip_comment_marker(text).trim_start() +} + +fn any_starts(text: &str, list: &[&str]) -> bool { + list.iter().any(|p| text.starts_with(p)) +} + +fn any_contains(text: &str, list: &[&str]) -> bool { + list.iter().any(|m| text.contains(m)) +} + +fn any_starts_after_strip(text: &str, list: &[&str]) -> bool { + let s = stripped_after_marker(text); + let s = s.strip_prefix('@').unwrap_or(s); + any_starts(s, list) +} + +fn is_shebang(text: &str, _comment: &Comment) -> bool { + text.starts_with("#!") +} + +fn is_license(text: &str, _comment: &Comment) -> bool { + any_contains(text, LICENSE_MARKERS) +} + +fn is_generated_file(text: &str, _comment: &Comment) -> bool { + any_contains(text, GENERATED_MARKERS) +} + +fn is_directive(text: &str, _comment: &Comment) -> bool { + any_starts_after_strip(text, DIRECTIVE_PREFIXES) +} + +fn is_bdd(text: &str, _comment: &Comment) -> bool { + let s = strip_comment_marker(text).trim(); + BDD_KEYWORDS.contains(&s) +} + +/// A docstring documents a public contract when it carries contract markup +/// (`@param`, `Args:`, `Returns:`, …). +/// +/// Structural context can only *narrow* that judgement, never widen it — the +/// corpus treats a bare summary line (`"""Fetch the user."""`) as a +/// restatement, so position alone must not justify a comment. When context is +/// available the markup must additionally be positioned as a contract (U4): +/// attached to a declaration, not trailing a statement; and it must not merely +/// echo the declaration it documents (U3). +fn is_public_api_doc(text: &str, comment: &Comment) -> bool { + if comment.comment_type != CommentType::Docstring { + return false; + } + if !any_contains(text, DOC_MARKUP) { + return false; + } + let Some(ctx) = comment.context.as_ref() else { + // Text-only path: markup is the whole signal. + return true; + }; + let positioned_as_contract = match ctx.position { + // Python-style: the docstring lives at the head of the body it documents. + PositionRole::DocstringHead => true, + // Brace-style: the doc comment precedes the declaration it documents. + PositionRole::Leading => ctx.annotates_declaration, + // A doc-shaped comment after or beside code documents nothing. + PositionRole::Trailing | PositionRole::Inline => false, + }; + positioned_as_contract && !restates_adjacent(comment) +} + +fn is_non_obvious_intent(text: &str, _comment: &Comment) -> bool { + any_contains(text, INTENT_MARKERS) +} + +fn is_attribution(text: &str, _comment: &Comment) -> bool { + any_contains(text, ATTRIBUTION_MARKERS) +} + +fn is_agent_memo(text: &str, _comment: &Comment) -> bool { + any_starts(stripped_after_marker(text), AGENT_MEMO_PREFIXES) +} + +fn is_commented_out_code(text: &str, _comment: &Comment) -> bool { + let s = stripped_after_marker(text); + any_starts(s, CODE_KEYWORDS) || any_contains(s, CODE_PUNCTUATION) || looks_like_assignment(s) +} + +/// True when the text is shaped like an assignment statement: a bare +/// identifier path, then ` = `, then a value — `x = x + 1`, `cfg.retries = 3`. +/// +/// Deliberately narrow: the left side must be a single path with no spaces, so +/// prose that happens to contain an equals sign (`set x = 1 because …`) is not +/// mistaken for code. +fn looks_like_assignment(s: &str) -> bool { + let Some((lhs, rhs)) = s.split_once(" = ") else { + return false; + }; + if rhs.trim().is_empty() { + return false; + } + let lhs = lhs.trim(); + let path_char = |c: char| c.is_alphanumeric() || matches!(c, '_' | '.' | '[' | ']' | '*' | '&'); + let starts_path = lhs + .chars() + .next() + .is_some_and(|c| c.is_alphabetic() || matches!(c, '_' | '*' | '&')); + !lhs.is_empty() && starts_path && lhs.chars().all(path_char) +} + +fn is_vacuous_todo(text: &str, _comment: &Comment) -> bool { + any_starts(stripped_after_marker(text), TODO_PREFIXES) +} + +const LICENSE_MARKERS: &[&str] = &[ + "spdx-license-identifier", + "copyright", + "licensed under", + "permission is hereby granted", + "all rights reserved", + "redistribution and use", + "gnu general public license", + "apache license", + "mit license", + "bsd license", + "mozilla public license", +]; +const GENERATED_MARKERS: &[&str] = &[ + "do not edit", + "auto-generated", + "autogenerated", + "code generated", + "generated by", +]; + +const DIRECTIVE_PREFIXES: &[&str] = &[ + "noqa", + "type:", + "pyright:", + "ruff:", + "mypy:", + "pylint:", + "flake8:", + "pyre:", + "pytype:", + "eslint-disable", + "eslint-ignore", + "prettier-ignore", + "ts-ignore", + "ts-expect-error", + "ts-nocheck", + "clippy:", + "golangci-lint:", + "nolint", + "lint:", + "fmt:", + "shellcheck", + "cspell", + "spell-checker", + "istanbul", + "gosec", + "staticcheck", + "tslint", + "stylelint", + "biome", + "sonar", + "codacy", + "noinspection", + "pragma:", + "yaml-language-server", +]; + +const BDD_KEYWORDS: &[&str] = &[ + "given", + "when", + "then", + "arrange", + "act", + "assert", + "when & then", + "when&then", +]; + +const DOC_MARKUP: &[&str] = &[ + "@param", + "@returns", + "@return", + "@throws", + "@raises", + "@exception", + "@example", + "@see", + "@author", + "@deprecated", + "@since", + "@type", + "@typedef", + "@property", + "# examples", + "# panics", + "# errors", + "# safety", + ":param", + ":return:", + ":rtype:", + ":raises:", + ":type", + "args:", + "returns:", + "raises:", + "yields:", + "attributes:", + "@brief", + "@details", +]; + +const INTENT_MARKERS: &[&str] = &[ + "why", + "because", + "workaround", + "note:", + "important:", + "warning:", + "caution:", + "fixes #", + "issue #", + "bug #", + "see http", + "https://", + "http://", + "to avoid", + "to prevent", + "must not", + "should not", + "must be", + "deprecated:", + "algorithm", + "regex", + "security", + "thread-safety", + "thread safety", + "ref:", + "@link", +]; + +const ATTRIBUTION_MARKERS: &[&str] = &[ + "@author", + "@copyright", + "adapted from", + "based on", + "ported from", + "credit", + "@see", + "@link", +]; + +const AGENT_MEMO_PREFIXES: &[&str] = &[ + "changed", + "modified", + "updated", + "refactor", + "moved", + "renamed", + "replaced", + "removed", + "deleted", + "added", + "implemented", + "created", + "fixed", + "this implements", + "this adds", + "this removes", + "this changes", + "this fixes", + "here we", + "now we", + "now this", + "now it", + "previously", + "before this", + "after this", + "was changed", + "implementation of", + "implementation note", + "converted", + "migrated", + "switched", +]; + +const TODO_PREFIXES: &[&str] = &["todo", "fixme"]; + +const CODE_KEYWORDS: &[&str] = &[ + "if ", "else ", "for ", "while ", "return ", "var ", "let ", "const ", "func ", "fn ", + "class ", "def ", "import ", "from ", "print", "fmt.", "console.", "package ", "use ", "pub ", + "throw ", "raise ", "echo ", "require(", "select ", "insert ", "update ", "delete ", "typeof ", + "async ", "await ", "std::", "self.", "this.", +]; + +const CODE_PUNCTUATION: &[&str] = &[";", "{", "}", "=>", ":=", "++", "--", "=="]; diff --git a/crates/comment-checker/src/comment.rs b/crates/comment-checker/src/comment.rs new file mode 100644 index 0000000..91f4c0d --- /dev/null +++ b/crates/comment-checker/src/comment.rs @@ -0,0 +1,140 @@ +//! The domain model: a comment and the verdict a classifier assigns. + +/// How a comment is written in source. +#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +pub enum CommentType { + Line, + Block, + Docstring, +} + +/// Position role of a comment relative to its surrounding code. +#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +pub enum PositionRole { + /// The comment occupies the head slot of a body: the first non-trivia child + /// of a declaration's body, or of the file itself. + /// + /// This is **positional only** — a `#` line comment at the top of a file + /// occupies the slot without being a docstring. Rules that treat the slot as + /// evidence of documentation must also require + /// [`CommentType::Docstring`]. + DocstringHead, + /// Comment precedes any code on the same statement block. + Leading, + /// Comment follows code on the same statement block. + Trailing, + /// Comment sits on the same line as a code token (covers end-of-line comments). + Inline, +} + +/// Coarse syntactic scope where a comment lives. +#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +pub enum Scope { + Module, + Function, + NestedBlock, +} + +/// Structural context for a comment, captured by the tree-sitter walk. +/// +/// `unreliable` flags context that may be incomplete at the edge of an +/// `Edit`/`MultiEdit` fragment — the runtime must not convict on unreliable +/// context and instead fall back to the text-only path. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct CommentContext { + /// The code this comment annotates: the next non-comment sibling for a + /// leading comment, or the preceding one for a trailing/inline comment. + pub adjacent_code: Option, + /// True when the annotated code is a declaration (function, method, class, + /// impl, trait, struct) rather than an ordinary statement. A doc comment + /// attached to a declaration documents a contract; one attached to a + /// statement does not. + pub annotates_declaration: bool, + pub scope: Scope, + pub position: PositionRole, + /// Set when the context may be incomplete at the edge of an `Edit` or + /// `MultiEdit` fragment. The classifier must not convict on the catch-all + /// path when this is set. + pub unreliable: bool, +} + +impl Default for CommentContext { + fn default() -> Self { + Self { + adjacent_code: None, + annotates_declaration: false, + scope: Scope::Module, + position: PositionRole::Leading, + unreliable: false, + } + } +} + +/// A comment found in source, before classification. +#[derive(Clone, Debug, Eq, PartialEq)] +pub struct Comment { + /// Comment text as written, including its syntactic markers. + pub text: String, + /// 1-based line number of the comment's start. + pub line_number: usize, + /// Syntactic form of the comment. + pub comment_type: CommentType, + /// Structural context, populated by the detector. + /// `None` means the classifier must use the text-only path. + pub context: Option, +} + +impl Comment { + #[must_use] + pub fn new(text: impl Into, line_number: usize, comment_type: CommentType) -> Self { + Self { + text: text.into(), + line_number, + comment_type, + context: None, + } + } +} + +/// Why a comment is worth keeping. +#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +pub enum Justification { + /// A `#!` interpreter line. + Shebang, + /// A license, copyright, or SPDX header. + LicenseHeader, + /// A notice that the file is generated and must not be hand-edited. + GeneratedFile, + /// A linter or type-checker directive (`# noqa`, `// @ts-ignore`, …). + LinterDirective, + /// A BDD step keyword (`# given`, `# when`, `# then`, …). + BddStep, + /// A docstring documenting a public contract. + PublicApiDoc, + /// A comment explaining non-obvious intent (`why`, `because`, …). + NonObviousIntent, + /// Attribution or provenance (`@author`, `adapted from`, …). + Attribution, +} + +/// Why a comment should be removed. +#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +pub enum UnnecessaryKind { + /// A memo-style note describing what changed, not why. + AgentMemo, + /// Code that has been commented out. + CommentedOutCode, + /// A `TODO`/`FIXME` with no tracked reference. + VacuousTodo, + /// A comment that merely restates what the code already says. + RestatesCode, +} + +/// The classification decision for a single comment. +#[derive(Clone, Debug, Eq, PartialEq)] +pub enum Verdict { + /// Keep this comment — it serves a real purpose. + Justified { reason: Justification }, + /// Remove this comment — it is unnecessary. + Unnecessary { reason: UnnecessaryKind }, +} diff --git a/crates/comment-checker/src/detect.rs b/crates/comment-checker/src/detect.rs new file mode 100644 index 0000000..147f99c --- /dev/null +++ b/crates/comment-checker/src/detect.rs @@ -0,0 +1,384 @@ +//! Extract comments from source using tree-sitter, with structural context. + +use crate::comment::{Comment, CommentContext, CommentType, PositionRole, Scope}; +use crate::language::{language_for_name, language_name_for_path}; +use tree_sitter::{Node, Parser}; + +/// Node kinds that denote comments across grammars. +const COMMENT_KINDS: &[&str] = &[ + "comment", + "line_comment", + "block_comment", + "multiline_comment", + "doc_comment", + "documentation_comment", +]; + +/// Find every comment in `content`, treating it as a file named `file_path`. +#[must_use] +pub fn detect_comments(content: &str, file_path: &str) -> Vec { + let Some(language_name) = language_name_for_path(file_path) else { + return Vec::new(); + }; + let Some(language) = language_for_name(language_name) else { + return Vec::new(); + }; + + let mut parser = Parser::new(); + if parser.set_language(&language).is_err() { + return Vec::new(); + } + let Some(tree) = parser.parse(content.as_bytes(), None) else { + return Vec::new(); + }; + + let bytes = content.as_bytes(); + let mut comments = collect_comments(tree.root_node(), bytes); + + if language_name == "python" { + comments.extend(collect_python_docstrings(tree.root_node(), bytes)); + } + comments.sort_by_key(|c| c.line_number); + comments +} + +fn comment_type(node_kind: &str, text: &str) -> CommentType { + let t = text.trim_start(); + if t.starts_with("///") || t.starts_with("//!") || t.starts_with("/**") || t.starts_with("/*!") + { + CommentType::Docstring + } else if node_kind.contains("block") || node_kind.contains("multiline") || t.starts_with("/*") + { + CommentType::Block + } else { + CommentType::Line + } +} + +fn is_comment_kind(node: &Node<'_>) -> bool { + COMMENT_KINDS.contains(&node.kind()) +} + +/// Build a [`Comment`] from a comment-bearing node. +fn comment_from(node: Node<'_>, bytes: &[u8], forced_type: Option) -> Comment { + let text = node.utf8_text(bytes).unwrap_or_default().to_owned(); + let comment_type = forced_type.unwrap_or_else(|| comment_type(node.kind(), &text)); + Comment { + text, + line_number: node.start_position().row + 1, + comment_type, + context: Some(derive_context(node, bytes)), + } +} + +/// Walk the tree, collecting every comment node with its structural context. +/// +/// A comment node's children are never visited: grammars such as +/// tree-sitter-rust nest an inner content node inside `///` doc comments, and +/// descending would emit a marker-stripped phantom comment alongside the real +/// one. +fn collect_comments(root: Node<'_>, bytes: &[u8]) -> Vec { + let mut comments = Vec::new(); + let mut cursor = root.walk(); + 'walk: loop { + let node = cursor.node(); + let is_comment = is_comment_kind(&node); + if is_comment { + comments.push(comment_from(node, bytes, None)); + } + // Descend only into non-comment nodes. + if !is_comment && cursor.goto_first_child() { + continue; + } + while !cursor.goto_next_sibling() { + if !cursor.goto_parent() { + break 'walk; + } + } + } + comments +} + +/// Python docstrings are string expressions, not comment nodes: the first +/// statement of a module, class body or function body when that statement is a +/// bare string. Walked directly rather than queried so a grammar change +/// degrades to "not a docstring" instead of silently matching nothing. +fn collect_python_docstrings(root: Node<'_>, bytes: &[u8]) -> Vec { + let mut docstrings = Vec::new(); + let mut cursor = root.walk(); + 'walk: loop { + let node = cursor.node(); + if is_python_docstring(node) { + docstrings.push(comment_from(node, bytes, Some(CommentType::Docstring))); + } + if cursor.goto_first_child() { + continue; + } + while !cursor.goto_next_sibling() { + if !cursor.goto_parent() { + break 'walk; + } + } + } + docstrings +} + +/// True when `node` is a `string` that forms the entire first statement of a +/// module or of a class/function body. +/// +/// Two grammar shapes are accepted: current tree-sitter-python makes the +/// docstring a direct `string` child of `module`/`block`, while older versions +/// wrapped it in an `expression_statement`. Matching both means a grammar bump +/// cannot silently turn docstring detection off. +fn is_python_docstring(node: Node<'_>) -> bool { + if node.kind() != "string" { + return false; + } + let Some(parent) = node.parent() else { + return false; + }; + // The statement that stands in the container's child list. + let statement = if parent.kind() == "expression_statement" { + parent + } else { + node + }; + let Some(container) = statement.parent() else { + return false; + }; + if !matches!(container.kind(), "module" | "block") { + return false; + } + let Some(first) = container.named_child(0) else { + return false; + }; + first.id() == statement.id() +} + +/// Derive the structural context for a comment node. +/// +/// The adjacent code is the code the comment *annotates*: the next non-comment +/// sibling for a leading comment, falling back to the previous sibling for a +/// trailing or inline comment that has nothing after it. +fn derive_context(node: Node<'_>, bytes: &[u8]) -> CommentContext { + let line = node.start_position().row; + let prev = code_sibling(node, Direction::Prev); + let next = code_sibling(node, Direction::Next); + + let inline = prev.is_some_and(|p| p.end_position().row == line); + let position = if inline { + PositionRole::Inline + } else if is_docstring_head(node) { + PositionRole::DocstringHead + } else if next.is_some() { + PositionRole::Leading + } else if prev.is_some() { + PositionRole::Trailing + } else { + PositionRole::Leading + }; + + // A leading comment annotates what follows; a trailing/inline one annotates + // what precedes it. + let annotated = match position { + PositionRole::Trailing | PositionRole::Inline => prev.or(next), + PositionRole::Leading | PositionRole::DocstringHead => next.or(prev), + }; + + CommentContext { + adjacent_code: annotated.and_then(|n| adjacent_text_from(n, bytes)), + annotates_declaration: annotated.is_some_and(|n| is_declaration(n)), + scope: derive_scope(node), + position, + unreliable: false, + } +} + +/// True when `node` declares a named contract rather than performing a step. +/// Wrapper nodes (Go's `declaration`, Java's `..._declaration`) are unwrapped +/// one level so a doc comment before `func Add(...)` still sees a declaration. +fn is_declaration(node: Node<'_>) -> bool { + let kind = node.kind(); + if is_function_like(kind) || is_class_like(kind) { + return true; + } + let mut cursor = node.walk(); + node.named_children(&mut cursor) + .any(|child| is_function_like(child.kind()) || is_class_like(child.kind())) +} + +#[derive(Clone, Copy)] +enum Direction { + Prev, + Next, +} + +/// The nearest sibling that is real code — skipping comments and punctuation. +fn code_sibling(node: Node<'_>, direction: Direction) -> Option> { + let mut current = node; + loop { + let sibling = match direction { + Direction::Prev => current.prev_sibling(), + Direction::Next => current.next_sibling(), + }?; + if !is_comment_kind(&sibling) && !is_trivia(&sibling) { + return Some(sibling); + } + current = sibling; + } +} + +/// The annotated code's source text, truncated to keep reports bounded. +fn adjacent_text_from(node: Node<'_>, bytes: &[u8]) -> Option { + let text = node.utf8_text(bytes).unwrap_or("").trim(); + if text.is_empty() { + None + } else { + Some(truncate(text, 240)) + } +} + +/// Scope derivation: inside a function-like or class-like ancestor → `Function`; +/// inside a nested block → `NestedBlock`; otherwise `Module`. +fn derive_scope(node: Node<'_>) -> Scope { + let mut parent = node.parent(); + let mut saw_block = false; + while let Some(current) = parent { + let kind = current.kind(); + if is_function_like(kind) || is_class_like(kind) { + return Scope::Function; + } + if is_nested_block(kind) { + saw_block = true; + } + parent = current.parent(); + } + if saw_block { + Scope::NestedBlock + } else { + Scope::Module + } +} + +fn is_function_like(kind: &str) -> bool { + matches!( + kind, + "function" + | "function_item" + | "function_definition" + | "function_declaration" + | "function_signature_item" + | "method" + | "method_definition" + | "method_declaration" + | "singleton_method" + | "generator_function" + | "generator_function_definition" + | "arrow_function" + | "lambda" + ) +} + +fn is_class_like(kind: &str) -> bool { + matches!( + kind, + "class" + | "class_definition" + | "class_declaration" + | "impl_item" + | "trait_item" + | "struct_item" + | "enum_item" + | "interface_declaration" + ) +} + +fn is_nested_block(kind: &str) -> bool { + matches!( + kind, + "block" + | "statement_block" + | "compound_statement" + | "do_statement" + | "while_statement" + | "for_statement" + | "for_in_statement" + | "enhanced_for_statement" + | "if_statement" + | "try_statement" + | "switch_statement" + | "match_statement" + ) +} + +/// A comment is a docstring head only when it is the first non-trivia child of +/// a declaration's body, or of the file itself — nothing but trivia may +/// precede it. A doc comment on the second member of a class is a leading +/// comment, not a docstring head. +fn is_docstring_head(node: Node<'_>) -> bool { + let Some(parent) = node.parent() else { + return false; + }; + let parent_kind = parent.kind(); + // The head slot exists either at file scope (a module docstring) or at the + // top of a declaration's body block. + let at_file_scope = is_file_root(parent_kind); + if !at_file_scope { + if !is_body_block(parent_kind) { + return false; + } + let Some(grandparent) = parent.parent() else { + return false; + }; + if !is_function_like(grandparent.kind()) && !is_class_like(grandparent.kind()) { + return false; + } + } + let mut cursor = parent.walk(); + for child in parent.children(&mut cursor) { + if child.id() == node.id() { + return true; + } + if !is_trivia(&child) { + // Real code (or an earlier comment) precedes this one. + return false; + } + } + false +} + +/// Root node kinds: the whole-file container for a grammar. +fn is_file_root(kind: &str) -> bool { + matches!( + kind, + "module" | "program" | "source_file" | "translation_unit" + ) +} + +fn is_body_block(kind: &str) -> bool { + matches!( + kind, + "block" | "statement_block" | "body" | "suite" | "class_body" | "block_statement" + ) +} + +/// Punctuation and layout nodes that sit between real code tokens. +fn is_trivia(node: &Node<'_>) -> bool { + matches!( + node.kind(), + "{" | "}" | "(" | ")" | ";" | "," | ":" | "newline" | "indent" | "dedent" + ) +} + +fn truncate(s: &str, max_bytes: usize) -> String { + if s.len() <= max_bytes { + return s.to_owned(); + } + let mut end = max_bytes; + while end > 0 && !s.is_char_boundary(end) { + end -= 1; + } + let mut out = s[..end].to_owned(); + out.push('…'); + out +} diff --git a/crates/comment-checker/src/hook.rs b/crates/comment-checker/src/hook.rs new file mode 100644 index 0000000..6fab685 --- /dev/null +++ b/crates/comment-checker/src/hook.rs @@ -0,0 +1,43 @@ +//! Decode the Claude Code hook payload (CONST-B5: decode, never cast). + +use serde::Deserialize; + +/// The JSON Claude Code sends to a `PostToolUse` hook. +#[derive(Debug, Deserialize)] +pub struct HookInput { + #[serde(default)] + pub tool_name: String, + #[serde(default)] + pub tool_input: ToolInput, +} + +/// The `tool_input` field: content differs by tool. +#[derive(Debug, Default, Deserialize)] +pub struct ToolInput { + #[serde(default)] + pub file_path: String, + #[serde(default)] + pub content: String, + #[serde(default)] + pub new_string: String, + #[serde(default)] + pub old_string: String, + #[serde(default)] + pub edits: Vec, +} + +/// One edit in a `MultiEdit` payload. +#[derive(Debug, Deserialize)] +pub struct Edit { + #[serde(default)] + pub old_string: String, + #[serde(default)] + pub new_string: String, +} + +/// Decode the raw hook JSON. Returns `None` on any malformed input, which the +/// caller treats as "skip" — a hook must never block the user on bad input. +#[must_use] +pub fn decode(input: &str) -> Option { + serde_json::from_str(input).ok() +} diff --git a/crates/comment-checker/src/language.rs b/crates/comment-checker/src/language.rs new file mode 100644 index 0000000..78882c5 --- /dev/null +++ b/crates/comment-checker/src/language.rs @@ -0,0 +1,76 @@ +//! Map file paths and extensions to the tree-sitter language used to parse them. + +use tree_sitter::Language; + +/// The canonical language name for a file path, if this tool supports it. +#[must_use] +pub fn language_name_for_path(file_path: &str) -> Option<&'static str> { + let extension = extension_or_basename(file_path)?; + language_name_for_extension(extension) +} + +/// The canonical language name for a bare extension, if supported. +#[must_use] +pub fn language_name_for_extension(extension: &str) -> Option<&'static str> { + language_name_for_alias(extension.trim_start_matches('.')) +} + +/// Load the compiled tree-sitter [`Language`] for a canonical name. +#[must_use] +pub fn language_for_name(name: &str) -> Option { + tree_sitter_language_pack::get_language(name).ok() +} + +fn language_name_for_alias(extension: &str) -> Option<&'static str> { + match extension { + "py" | "pyi" | "pyw" => Some("python"), + "js" | "jsx" | "mjs" | "cjs" => Some("javascript"), + "ts" => Some("typescript"), + "tsx" => Some("tsx"), + "go" => Some("go"), + "rs" => Some("rust"), + "c" | "h" => Some("c"), + "cc" | "cpp" | "cxx" | "hpp" | "hh" => Some("cpp"), + "java" => Some("java"), + "kt" | "kts" => Some("kotlin"), + "scala" | "sc" => Some("scala"), + "rb" => Some("ruby"), + "php" => Some("php"), + "swift" => Some("swift"), + "cs" => Some("csharp"), + "ex" | "exs" => Some("elixir"), + "sh" | "bash" | "zsh" => Some("bash"), + "lua" => Some("lua"), + "sql" => Some("sql"), + "json" => Some("json"), + "yaml" | "yml" => Some("yaml"), + "toml" => Some("toml"), + "html" | "htm" => Some("html"), + "css" => Some("css"), + "dockerfile" => Some("dockerfile"), + "hcl" | "tf" => Some("hcl"), + "md" | "markdown" => Some("markdown"), + "r" | "rmd" => Some("r"), + "dart" => Some("dart"), + "zig" => Some("zig"), + "hs" => Some("haskell"), + "ml" | "mli" => Some("ocaml"), + "svelte" => Some("svelte"), + "elm" => Some("elm"), + "groovy" | "gradle" => Some("groovy"), + "cue" => Some("cue"), + "proto" => Some("proto"), + _ => None, + } +} + +/// The file extension, or the whole basename when there is no extension +/// (Dockerfile, Makefile, …). +fn extension_or_basename(file_path: &str) -> Option<&str> { + let basename = file_path.rsplit('/').next().unwrap_or(file_path); + basename + .rsplit_once('.') + .filter(|(_, ext)| !ext.is_empty()) + .map(|(_, ext)| ext) + .or_else(|| (!basename.is_empty()).then_some(basename)) +} diff --git a/crates/comment-checker/src/lib.rs b/crates/comment-checker/src/lib.rs new file mode 100644 index 0000000..4902f6f --- /dev/null +++ b/crates/comment-checker/src/lib.rs @@ -0,0 +1,24 @@ +//! `claude-code-comment-checker` — classify code comments as justified or unnecessary. +//! +//! A Claude Code `PostToolUse` hook: it reads the hook payload, detects the +//! comments in the just-written code, classifies each as justified or +//! unnecessary, and blocks (exit 2) when any are unnecessary. +//! +//! Split along the functional-core/imperative-shell seam (CONST-B1): the pure +//! core is [`classify`], and the shell reads stdin, drives tree-sitter +//! ([`detect`]), and writes the report. + +pub mod check; +pub mod classify; +pub mod comment; +pub mod detect; +pub mod hook; +pub mod language; +pub mod report; + +pub use check::{Outcome, check}; +pub use classify::classify; +pub use comment::{ + Comment, CommentContext, CommentType, Justification, PositionRole, Scope, UnnecessaryKind, + Verdict, +}; diff --git a/crates/comment-checker/src/main.rs b/crates/comment-checker/src/main.rs new file mode 100644 index 0000000..8b8b527 --- /dev/null +++ b/crates/comment-checker/src/main.rs @@ -0,0 +1,33 @@ +//! The `comment-checker` binary: a Claude Code `PostToolUse` hook. + +use std::io::Read; +use std::process::ExitCode; + +use clap::Parser; +use claude_code_comment_checker::{Outcome, check}; + +/// A hook that flags unnecessary code comments. +#[derive(Parser)] +#[command(version, about)] +struct Cli { + /// Replace the default warning message; `{{comments}}` inserts the report. + #[arg(long)] + prompt: Option, +} + +fn main() -> ExitCode { + let cli = Cli::parse(); + let mut input = String::new(); + let _ = std::io::stdin().read_to_string(&mut input); + + match check(&input, cli.prompt.as_deref().unwrap_or_default()) { + Outcome::Pass { note } => { + print!("{note}"); + ExitCode::from(0) + } + Outcome::Block { report } => { + print!("{report}"); + ExitCode::from(2) + } + } +} diff --git a/crates/comment-checker/src/report.rs b/crates/comment-checker/src/report.rs new file mode 100644 index 0000000..d9ae5c3 --- /dev/null +++ b/crates/comment-checker/src/report.rs @@ -0,0 +1,58 @@ +//! Shape the warning report (CONST-B3: shape is pure). + +use crate::comment::{Comment, UnnecessaryKind}; + +/// A comment the classifier marked unnecessary, kept for the report. +#[derive(Clone, Copy, Debug)] +pub struct Flagged<'a> { + pub comment: &'a Comment, + pub kind: UnnecessaryKind, +} +#[must_use] +pub fn format_report(flagged: &[Flagged<'_>], file_path: &str, custom_prompt: &str) -> String { + let header = format!( + "An automated reviewer flagged {} comment(s) in {file_path} as unnecessary.", + flagged.len() + ); + let mut lines = vec![ + header, + String::new(), + "Each is stated with the specific reason it should be removed. Do not".to_string(), + "dismiss these as \"justified\" — the reason is given so the claim can be".to_string(), + "checked, not argued away.".to_string(), + String::new(), + ]; + for flag in flagged { + lines.push(format!( + " line {} — {} — {}", + flag.comment.line_number, + flag.comment.text.trim(), + reason_text(flag.kind), + )); + } + lines.push(String::new()); + lines.push("Action: delete the flagged comments. If the code is unclear without".to_string()); + lines.push( + "one, make the code self-explanatory instead — better names, extraction,".to_string(), + ); + lines.push("a clearer type — and do not re-add the comment.".to_string()); + let report = lines.join("\n"); + if custom_prompt.is_empty() { + report + } else { + custom_prompt.replace("{{comments}}", &report) + } +} + +fn reason_text(kind: UnnecessaryKind) -> &'static str { + match kind { + UnnecessaryKind::RestatesCode => "restates what the code already says", + UnnecessaryKind::AgentMemo => { + "describes what changed, not why — git history already records this" + } + UnnecessaryKind::CommentedOutCode => "dead code left in a comment", + UnnecessaryKind::VacuousTodo => { + "a TODO with no tracked reference — file a ticket or delete it" + } + } +} diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs new file mode 100644 index 0000000..19b5e27 --- /dev/null +++ b/crates/comment-checker/tests/classify.rs @@ -0,0 +1,652 @@ +//! Tests for the pure classification core. +//! +//! Two layers, per the testing trophy (CONST-T1): +//! - **Property tests** pin the invariants: totality (no panic on any input) +//! and "a justified category is never flagged". +//! - **Contract cases** pin the observable flag/allow decision for each +//! category, in both directions, so a rule change or removal fails a test. + +use claude_code_comment_checker::classify::classify; +use claude_code_comment_checker::{Comment, CommentType, Justification, UnnecessaryKind, Verdict}; +use proptest::prelude::*; +use proptest::strategy::Strategy; + +fn arbitrary_comment() -> impl Strategy { + ( + any::(), + any::(), + prop_oneof![ + Just(CommentType::Line), + Just(CommentType::Block), + Just(CommentType::Docstring), + ], + ) + .prop_map(|(text, line, comment_type)| Comment::new(text, line, comment_type)) +} + +fn line(text: impl Into) -> Comment { + Comment::new(text, 1, CommentType::Line) +} + +fn docstring(text: impl Into) -> Comment { + Comment::new(text, 1, CommentType::Docstring) +} + +proptest! { + /// `classify` is a total function: it never panics on any comment, + /// whatever the text, line number, or syntactic form. + #[test] + fn classify_is_total(comment in arbitrary_comment()) { + let _ = classify(&comment); + } + + /// A shebang is never flagged, whatever follows the `#!`. + #[test] + fn shebang_is_never_flagged(tail in any::()) { + let comment = line(format!("#!{tail}")); + assert_eq!( + classify(&comment), + Verdict::Justified { reason: Justification::Shebang } + ); + } + + /// Text carrying an SPDX marker is never flagged. + #[test] + fn license_is_never_flagged(prefix in any::(), suffix in any::()) { + let comment = line(format!("{prefix} SPDX-License-Identifier {suffix}")); + assert!(matches!(classify(&comment), Verdict::Justified { .. })); + } + + /// A linter directive is never flagged, whatever follows the marker. + #[test] + fn directive_is_never_flagged(tail in any::()) { + let comment = line(format!("# noqa{tail}")); + assert_eq!( + classify(&comment), + Verdict::Justified { reason: Justification::LinterDirective } + ); + } + + /// A BDD step keyword is never flagged. + #[test] + fn bdd_step_is_never_flagged(keyword in prop_oneof![ + Just("given"), Just("when"), Just("then"), + Just("arrange"), Just("act"), Just("assert"), + ]) { + let comment = line(format!("# {keyword}")); + assert_eq!( + classify(&comment), + Verdict::Justified { reason: Justification::BddStep } + ); + } +} + +// Contract cases — each names the misclassification bug it catches. + +#[test] +fn plain_comment_is_unnecessary() { + // Bug: a comment that merely restates the code is flagged as justified, + // or mislabelled as a specific kind. + assert_eq!( + classify(&line("// adds one to one")), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode + } + ); +} + +#[test] +fn docstring_with_markup_is_public_api() { + // Bug: a public-API docstring (with param/return markup) is flagged. + let comment = + docstring("\"\"\"Fetches a user.\n Args:\n id: the user id.\n \"\"\""); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn docstring_without_markup_is_unnecessary() { + // Bug: a docstring that merely restates the signature is spared. + assert_eq!( + classify(&docstring("\"\"\"Fetch the user.\"\"\"")), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode + } + ); +} + +#[test] +fn non_obvious_intent_is_justified() { + // Bug: a comment explaining *why* (non-obvious intent) is flagged. + assert_eq!( + classify(&line("// workaround: the SDK panics on empty input")), + Verdict::Justified { + reason: Justification::NonObviousIntent + } + ); +} + +#[test] +fn attribution_is_justified() { + // Bug: provenance/attribution is flagged. + assert_eq!( + classify(&line("// @author Jane Doe")), + Verdict::Justified { + reason: Justification::Attribution + } + ); +} + +#[test] +fn generated_file_notice_is_justified() { + // Bug: a "do not hand-edit this generated file" notice is flagged. + assert_eq!( + classify(&line("// THIS FILE IS AUTO-GENERATED - DO NOT EDIT")), + Verdict::Justified { + reason: Justification::GeneratedFile + } + ); +} + +#[test] +fn agent_memo_is_unnecessary() { + // Bug: a memo-style "what changed" note is spared (or mislabelled). + assert_eq!( + classify(&line("// changed the retry count from 3 to 5")), + Verdict::Unnecessary { + reason: UnnecessaryKind::AgentMemo + } + ); +} + +#[test] +fn commented_out_code_is_unnecessary() { + // Bug: commented-out code is spared (or mislabelled). + assert_eq!( + classify(&line("// fmt.Println(\"debug\")")), + Verdict::Unnecessary { + reason: UnnecessaryKind::CommentedOutCode + } + ); +} + +#[test] +fn vacuous_todo_is_unnecessary() { + // Bug: a `TODO` with no tracked reference is spared (or mislabelled). + assert_eq!( + classify(&line("// TODO: refactor this later")), + Verdict::Unnecessary { + reason: UnnecessaryKind::VacuousTodo + } + ); +} + +// U3 — restate detection via adjacent-code token containment. + +#[test] +fn content_tokens_strips_markers_and_stop_words() { + use claude_code_comment_checker::classify::content_tokens; + let tokens = content_tokens("// The encode_string function encodes a string"); + assert!(tokens.contains("encode_string")); + assert!(tokens.contains("function")); + assert!(tokens.contains("encodes")); + assert!(tokens.contains("string")); + assert!(!tokens.contains("the")); + assert!(!tokens.contains("a")); +} + +#[test] +fn restates_adjacent_full_overlap() { + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// returns the string"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn returns() -> String".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(restates_adjacent(&comment)); +} + +#[test] +fn restates_adjacent_partial_overlap_above_half() { + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// the encode function"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn encode()".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(restates_adjacent(&comment)); +} + +#[test] +fn restates_adjacent_returns_false_for_genuinely_explanatory_comment() { + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// off-by-one bug in the tokenizer avoids ASCII prefix collision"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn next_token(&mut self)".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(!restates_adjacent(&comment)); +} + +#[test] +fn restates_adjacent_returns_false_when_no_adjacent_code() { + use claude_code_comment_checker::classify::restates_adjacent; + let comment = line("// whatever"); + assert!(!restates_adjacent(&comment)); +} + +// U4 — position/scope-aware narrowing of the PublicApiDoc rule. + +#[test] +fn docstring_head_without_markup_is_not_a_public_contract() { + // Position must never justify on its own: the corpus labels a bare summary + // line above a declaration a restatement, not documentation. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, PositionRole, Scope, UnnecessaryKind, Verdict, + }; + let mut comment = Comment::new("Adds two numbers", 1, CommentType::Docstring); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::DocstringHead, + unreliable: false, + }); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode, + } + ); +} + +#[test] +fn docstring_head_with_markup_is_a_public_contract() { + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new( + "Adds two numbers.\n\nArgs:\n a: first addend\n", + 1, + CommentType::Docstring, + ); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::DocstringHead, + unreliable: false, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc, + } + ); +} + +#[test] +fn trailing_docstring_with_markup_is_not_a_public_contract() { + // U4's narrowing: doc markup beside a statement documents nothing. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("@param a first addend", 1, CommentType::Docstring); + comment.context = Some(CommentContext { + adjacent_code: Some("total = 0".into()), + annotates_declaration: false, + scope: Scope::Module, + position: PositionRole::Trailing, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc, + } + ); +} + +#[test] +fn line_comment_in_head_slot_is_not_a_public_contract() { + // `DocstringHead` is positional: a `#` line comment first in a file + // occupies the slot. The comment_type gate is what stops it being read as + // documentation. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("@param a first addend", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Module, + position: PositionRole::DocstringHead, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc, + } + ); +} + +#[test] +fn assignment_shaped_comment_is_commented_out_code() { + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + assert_eq!( + classify(&line("// x = x + 1")), + Verdict::Unnecessary { + reason: UnnecessaryKind::CommentedOutCode, + } + ); +} + +#[test] +fn prose_containing_an_equals_sign_is_not_commented_out_code() { + // The assignment check must not swallow explanatory prose: a multi-word + // left side is not an identifier path. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + assert_ne!( + classify(&line("// set retries = 3 because the API flaps")), + Verdict::Unnecessary { + reason: UnnecessaryKind::CommentedOutCode, + } + ); +} + +#[test] +fn value_legend_with_numeric_left_side_is_not_commented_out_code() { + // `1` is not an assignment target, so a legend documenting an encoding is + // not dead code. Pins both conjuncts of the assignment shape: a non-empty + // left side is not sufficient, and being all path characters is not + // sufficient — it must also *start* like an identifier. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + assert_ne!( + classify(&line("// 1 = enabled, 2 = disabled")), + Verdict::Unnecessary { + reason: UnnecessaryKind::CommentedOutCode, + } + ); +} + +// Boundary tests — exist specifically to kill mutants that survived +// `cargo mutants`. Each one names the precise boundary it pins. + +#[test] +fn restates_adjacent_empty_comment_tokens_returns_false() { + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// /// *** only markup and stop words"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn encode()".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(!restates_adjacent(&comment)); +} + +#[test] +fn restates_adjacent_intermediate_containment_returns_false() { + // comment has 3 content tokens, 1 shared with adjacent → containment 1/3 ≈ 0.33. + // The mutant that replaces `/` with `*` reports a score of 1*3=3 ≥ 0.5 (true). + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// hello world friend"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn hello()".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(!restates_adjacent(&comment)); +} + +#[test] +fn restates_adjacent_requires_both_intersection_and_containment() { + // mutant 121 changes `&&` to `||`. With no intersection and small comment, the + // containment is 0 → real false. Mutant: 0 >= 1 is false, but containment_>=0.5 + // is also false, so this case wouldn't kill 121 alone — see the previous test + // for that. This test pins the AND structure for a different configuration. + use claude_code_comment_checker::classify::restates_adjacent; + use claude_code_comment_checker::{CommentContext, PositionRole, Scope}; + let mut comment = line("// alpha beta"); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn gamma()".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert!(!restates_adjacent(&comment)); +} + +#[test] +fn public_api_doc_requires_position_to_be_docstring_head() { + // mutant 197 changes `&&` between position and scope to `||`. + // Here position = Trailing, scope = Function → real returns false + // (chain broken at the position check); mutant returns true (scope passes + // and either-bound is enough). + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("Adds two numbers", 1, CommentType::Docstring); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Trailing, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn public_api_doc_requires_attachment_to_a_declaration() { + // A leading docstring above an ordinary statement documents nothing: + // `annotates_declaration: false` must block the structural promotion. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("Adds two numbers", 1, CommentType::Docstring); + comment.context = Some(CommentContext { + adjacent_code: Some("x = 1".into()), + annotates_declaration: false, + scope: Scope::NestedBlock, + position: PositionRole::Leading, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn public_api_doc_promotes_leading_docstring_on_a_declaration() { + // Brace-language shape: the doc comment precedes the declaration it + // documents, so it is never a DocstringHead but is still a public contract. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new( + "Wraps the retry budget.\n@param limit upper bound\n", + 1, + CommentType::Docstring, + ); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn spawn(limit: usize) -> Handle".into()), + annotates_declaration: true, + scope: Scope::Module, + position: PositionRole::Leading, + unreliable: false, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn public_api_doc_revoked_when_docstring_restates_the_signature() { + // U3 constrains U4: a docstring whose vocabulary is already in the + // signature is a signature echo, not documentation. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("returns the sum", 1, CommentType::Docstring); + comment.context = Some(CommentContext { + adjacent_code: Some("int sum(int a, int b) { return a + b; }".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn public_api_doc_requires_docstring_type_through_u4_chain() { + // mutant 199 changes the `&&` before the comment_type check to `||`. + // A comment WITHOUT context but WITH docstring markup must still return + // true through the markup branch (which is unaffected) — confirming the + // AND branch also requires comment_type=Docstring. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("Plain prose without markup", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add()".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::DocstringHead, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +#[test] +fn module_head_docstring_with_markup_is_a_public_contract() { + // A module docstring occupies the file's own head slot; with contract + // markup it documents the module's public surface. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new( + "\"\"\"Library entry point.\n\nAttributes:\n VERSION: semver string\n\"\"\"", + 1, + CommentType::Docstring, + ); + comment.context = Some(CommentContext { + adjacent_code: Some("import os".into()), + annotates_declaration: false, + scope: Scope::Module, + position: PositionRole::DocstringHead, + unreliable: false, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc + } + ); +} + +// Unreliable-context downgrade: a fallback `RestatesCode` verdict for an +// Edit/MultiEdit fragment must downgrade to `Justified` (NonObviousIntent). +// A real rule match (VacuousTodo, AgentMemo) still wins regardless. + +#[test] +fn unreliable_context_downgrades_fallback_restate_to_justified() { + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("Adds two numbers", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: true, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::NonObviousIntent, + } + ); +} + +#[test] +fn reliable_context_keeps_fallback_restate_as_unnecessary() { + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, PositionRole, Scope, UnnecessaryKind, Verdict, + }; + let mut comment = Comment::new("Adds two numbers", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode, + } + ); +} diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs new file mode 100644 index 0000000..de198b0 --- /dev/null +++ b/crates/comment-checker/tests/common/mod.rs @@ -0,0 +1,255 @@ +//! Shared evaluation corpus and helpers (used by the F1 gate). +//! +//! The corpus is loaded from `eval/corpus.json` — the single source of truth +//! (CONST-E1). Each case carries a kind-level ground-truth label so the gate +//! can report per-kind and per-language precision/recall, not just one number. +#![allow(dead_code)] + +use std::collections::BTreeMap; + +use claude_code_comment_checker::classify::classify; +use claude_code_comment_checker::detect::detect_comments; +use claude_code_comment_checker::{Comment, CommentType, Justification, UnnecessaryKind, Verdict}; +use serde::Deserialize; + +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub enum Label { + Unnecessary, + Justified, +} + +/// A single evaluation case, loaded from the canonical corpus JSON. +pub struct Case { + pub text: String, + pub language: String, + pub comment_type: CommentType, + /// Ground-truth kind: the specific `Justification`/`UnnecessaryKind` name. + pub kind: String, + pub label: Label, +} + +#[derive(Deserialize)] +struct RawCase { + text: String, + language: String, + comment_type: String, + kind: String, +} + +/// Load the canonical corpus from `eval/corpus.json`. +pub fn load_corpus() -> Vec { + let raw: Vec = serde_json::from_str(include_str!("../../../../eval/corpus.json")) + .expect("eval/corpus.json must be valid JSON"); + raw.into_iter() + .map(|r| { + let comment_type = match r.comment_type.as_str() { + "line" => CommentType::Line, + "block" => CommentType::Block, + "docstring" => CommentType::Docstring, + other => panic!("unknown comment_type: {other}"), + }; + let label = kind_label(&r.kind); + Case { + text: r.text, + language: r.language, + comment_type, + kind: r.kind, + label, + } + }) + .collect() +} + +/// Binary label (justified vs unnecessary) for a kind name. +pub fn kind_label(kind: &str) -> Label { + match kind { + "Shebang" | "LicenseHeader" | "GeneratedFile" | "LinterDirective" | "BddStep" + | "PublicApiDoc" | "NonObviousIntent" | "Attribution" => Label::Justified, + "AgentMemo" | "CommentedOutCode" | "VacuousTodo" | "RestatesCode" => Label::Unnecessary, + other => panic!("unknown kind: {other}"), + } +} + +/// Classify a case's text in isolation (no structural context). +pub fn predict(case: &Case) -> Verdict { + let comment = Comment::new(case.text.clone(), 1, case.comment_type); + classify(&comment) +} + +/// A statement that parses on its own in `language`. +fn filler_statement(language: &str) -> &'static str { + match language { + "bash" => "x=1", + "typescript" | "javascript" => "const x = 1;", + "go" => "package main", + "rust" => "pub fn f() {}", + "java" => "class A { int x = 1; }", + _ => "x = 1", + } +} + +/// Wrap a case's comment in the smallest snippet that parses in its language +/// and yields exactly that comment, so the gate can exercise the real +/// parse → detect → classify path instead of hand-building a `Comment`. +pub fn synthesize_source(case: &Case) -> String { + let text = case.text.as_str(); + if case.comment_type == CommentType::Docstring { + return match case.language.as_str() { + // Python docstrings live at the head of a body. + "python" => format!("def f():\n {text}\n return 1\n"), + // Java doc comments must sit inside a class body. + "java" => format!("class A {{\n{text}\nint f() {{ return 1; }}\n}}\n"), + // Brace languages: the doc comment precedes the declaration. + "typescript" | "javascript" => format!("{text}\nfunction f() {{}}\n"), + "go" => format!("package main\n\n{text}\nfunc F() {{}}\n"), + "rust" => format!("{text}\npub fn f() {{}}\n"), + other => format!("{text}\n{}\n", filler_statement(other)), + }; + } + // Line and block comments lead an ordinary statement. + format!("{text}\n{}\n", filler_statement(case.language.as_str())) +} + +/// The file name the synthesized snippet should be parsed as. +pub fn synthesized_path(case: &Case) -> String { + format!("case.{}", ext_for_language(case.language.as_str())) +} + +/// Classify a case through the production pipeline: parse the synthesized +/// snippet, detect its comments, and classify the one this case describes. +/// +/// `None` means detection did not find the comment at all — a detector defect, +/// which the gate reports rather than silently scoring as a miss. +pub fn predict_detected(case: &Case) -> Option { + let source = synthesize_source(case); + let path = synthesized_path(case); + let detected = detect_comments(&source, &path); + let wanted = case.text.trim(); + let matched = detected + .iter() + .find(|c| c.text.trim() == wanted) + .or_else(|| detected.iter().find(|c| c.text.contains(wanted))) + .or_else(|| { + // Grammars may normalize interior whitespace in multi-line comments. + let first_line = wanted.lines().next().unwrap_or(wanted).trim(); + detected.iter().find(|c| c.text.contains(first_line)) + })?; + Some(classify(matched)) +} + +/// The kind name a verdict assigns (mirrors the corpus `kind` vocabulary). +pub fn verdict_kind(verdict: &Verdict) -> &'static str { + match verdict { + Verdict::Justified { reason } => match reason { + Justification::Shebang => "Shebang", + Justification::LicenseHeader => "LicenseHeader", + Justification::GeneratedFile => "GeneratedFile", + Justification::LinterDirective => "LinterDirective", + Justification::BddStep => "BddStep", + Justification::PublicApiDoc => "PublicApiDoc", + Justification::NonObviousIntent => "NonObviousIntent", + Justification::Attribution => "Attribution", + }, + Verdict::Unnecessary { reason } => match reason { + UnnecessaryKind::AgentMemo => "AgentMemo", + UnnecessaryKind::CommentedOutCode => "CommentedOutCode", + UnnecessaryKind::VacuousTodo => "VacuousTodo", + UnnecessaryKind::RestatesCode => "RestatesCode", + }, + } +} + +/// Binary label a verdict assigns. +pub fn verdict_label(verdict: &Verdict) -> Label { + match verdict { + Verdict::Justified { .. } => Label::Justified, + Verdict::Unnecessary { .. } => Label::Unnecessary, + } +} + +pub fn ext_for_language(language: &str) -> &'static str { + match language { + "python" => "py", + "bash" => "sh", + "typescript" => "ts", + "javascript" => "js", + "go" => "go", + "rust" => "rs", + "ruby" => "rb", + "java" => "java", + _ => "txt", + } +} + +#[derive(Debug, Default, Clone, Copy)] +pub struct F1 { + pub precision: f64, + pub recall: f64, + pub score: f64, +} + +/// Per-kind and per-language breakdown plus the overall F1. +#[derive(Debug, Default)] +pub struct EvalReport { + pub overall: F1, + pub by_kind: BTreeMap<&'static str, KindMetrics>, + pub by_language: BTreeMap, +} + +#[derive(Debug, Default, Clone, Copy)] +pub struct KindMetrics { + /// How many cases the classifier assigned this kind. + pub predicted: u32, + /// How many of those matched the ground-truth kind. + pub correct: u32, +} + +#[derive(Debug, Default, Clone, Copy)] +pub struct LangMetrics { + pub tp: u32, + pub fp: u32, + pub fn_count: u32, +} + +/// Evaluate the classifier over the corpus: overall F1, per-kind, per-language. +pub fn evaluate(corpus: &[Case], verdicts: &[Verdict]) -> EvalReport { + let mut report = EvalReport::default(); + let mut tp = 0u32; + let mut fp = 0u32; + let mut fn_count = 0u32; + + for (case, verdict) in corpus.iter().zip(verdicts) { + let got_label = verdict_label(verdict); + match (case.label, got_label) { + (Label::Unnecessary, Label::Unnecessary) => tp += 1, + (Label::Justified, Label::Unnecessary) => fp += 1, + (Label::Unnecessary, Label::Justified) => fn_count += 1, + (Label::Justified, Label::Justified) => {} + } + + let got_kind = verdict_kind(verdict); + let k = report.by_kind.entry(got_kind).or_default(); + k.predicted += 1; + if case.kind == got_kind { + k.correct += 1; + } + + let lang = report.by_language.entry(case.language.clone()).or_default(); + match (case.label, got_label) { + (Label::Unnecessary, Label::Unnecessary) => lang.tp += 1, + (Label::Justified, Label::Unnecessary) => lang.fp += 1, + (Label::Unnecessary, Label::Justified) => lang.fn_count += 1, + (Label::Justified, Label::Justified) => {} + } + } + + let precision = f64::from(tp) / f64::from(tp + fp); + let recall = f64::from(tp) / f64::from(tp + fn_count); + let score = 2.0 * precision * recall / (precision + recall); + report.overall = F1 { + precision, + recall, + score, + }; + report +} diff --git a/crates/comment-checker/tests/context.rs b/crates/comment-checker/tests/context.rs new file mode 100644 index 0000000..8b8717b --- /dev/null +++ b/crates/comment-checker/tests/context.rs @@ -0,0 +1,138 @@ +//! Detection-layer contract tests: the structural context derived from a real +//! parse, per grammar. +//! +//! Every case here pins a defect that shipped once: a grammar whose docstrings +//! went undetected, a doc comment counted twice, adjacent code taken from the +//! wrong side, and a docstring-head role assigned to a comment with code above +//! it. The classifier tests cannot see any of these — they hand-build context. + +use claude_code_comment_checker::detect::detect_comments; +use claude_code_comment_checker::{Comment, CommentType, PositionRole, Scope}; + +fn only(src: &str, path: &str) -> Comment { + let mut found = detect_comments(src, path); + assert_eq!( + found.len(), + 1, + "expected exactly one comment in {path}, got {:?}", + found.iter().map(|c| c.text.clone()).collect::>() + ); + found.remove(0) +} + +#[test] +fn python_module_docstring_is_detected_at_the_file_head() { + let comment = only("\"\"\"Module docstring.\"\"\"\nimport os\n", "a.py"); + assert_eq!(comment.comment_type, CommentType::Docstring); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::DocstringHead); + assert_eq!(ctx.scope, Scope::Module); +} + +#[test] +fn python_function_docstring_is_detected_inside_the_body() { + let comment = only( + "def f(x):\n \"\"\"Fetch the user.\"\"\"\n return x\n", + "a.py", + ); + assert_eq!(comment.comment_type, CommentType::Docstring); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::DocstringHead); + assert_eq!(ctx.scope, Scope::Function); +} + +#[test] +fn rust_doc_comment_is_detected_exactly_once() { + // tree-sitter-rust nests a content node inside `///`; descending into a + // comment emitted a marker-stripped phantom comment alongside the real one. + let comment = only( + "/// Adds two numbers.\npub fn add(a: i32, b: i32) -> i32 { a + b }\n", + "a.rs", + ); + assert_eq!(comment.comment_type, CommentType::Docstring); + assert!( + comment.text.starts_with("///"), + "text was {:?}", + comment.text + ); +} + +#[test] +fn leading_comment_annotates_the_code_below_it_not_above() { + // A Go doc comment sits after the package clause and before the function it + // documents; the annotated code is the function. + let comment = only( + "package main\n\n// Add adds two numbers.\nfunc Add(a, b int) int { return a + b }\n", + "a.go", + ); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::Leading); + let adjacent = ctx.adjacent_code.expect("adjacent code"); + assert!( + adjacent.contains("func Add"), + "adjacent code was {adjacent:?}" + ); + assert!(ctx.annotates_declaration); +} + +#[test] +fn doc_comment_on_a_later_class_member_is_leading_not_docstring_head() { + // A field precedes this Javadoc, so it does not occupy the body's head slot. + let comment = only( + "class A {\n int x;\n /** Returns the sum. */\n int add(int a, int b) { return a + b; }\n}\n", + "A.java", + ); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::Leading); + let adjacent = ctx.adjacent_code.expect("adjacent code"); + assert!( + adjacent.contains("int add"), + "adjacent code was {adjacent:?}" + ); +} + +#[test] +fn trailing_comment_annotates_the_statement_beside_it() { + let comment = only("counter += 1 # increment the counter\n", "a.py"); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::Inline); + assert_eq!(ctx.adjacent_code.as_deref(), Some("counter += 1")); + assert!(!ctx.annotates_declaration); +} + +#[test] +fn comment_above_a_plain_statement_does_not_annotate_a_declaration() { + // `PositionRole` is positional: a comment first in the file occupies the + // head slot even though it is not a docstring. What keeps that safe is the + // `comment_type == Docstring` gate in the public-contract rule, pinned by + // `line_comment_in_head_slot_is_not_a_public_contract` in tests/classify.rs. + let comment = only("# increment the counter\ncounter += 1\n", "a.py"); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.position, PositionRole::DocstringHead); + assert_eq!(ctx.adjacent_code.as_deref(), Some("counter += 1")); + assert!(!ctx.annotates_declaration); +} + +#[test] +fn comment_below_a_statement_is_not_in_the_head_slot() { + let comments = detect_comments( + "counter = 0\n# increment the counter\ncounter += 1\n", + "a.py", + ); + let comment = comments + .iter() + .find(|c| c.text.contains("increment")) + .expect("comment detected"); + let ctx = comment.context.as_ref().expect("context"); + assert_eq!(ctx.position, PositionRole::Leading); + assert_eq!(ctx.adjacent_code.as_deref(), Some("counter += 1")); +} + +#[test] +fn detected_comments_carry_context_but_hand_built_ones_do_not() { + // The absent-context path is what keeps the text-only floor reachable. + let detected = only("# increment the counter\ncounter += 1\n", "a.py"); + assert!(detected.context.is_some()); + let hand_built = Comment::new("# increment the counter", 1, CommentType::Line); + assert!(hand_built.context.is_none()); +} diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs new file mode 100644 index 0000000..6b8f355 --- /dev/null +++ b/crates/comment-checker/tests/f1.rs @@ -0,0 +1,137 @@ +//! The F1 gate (CONST-E1): the classifier must reach F1 ≥ 0.85 on the +//! kind-labeled corpus, with per-kind and per-language visibility printed so a +//! weak kind or language cannot hide inside the aggregate. + +mod common; + +use common::{evaluate, load_corpus, predict, predict_detected, synthesize_source}; + +/// Every corpus case must survive the production path: parse a snippet in its +/// language, find the comment, classify it. This is the gate that fails when a +/// grammar bump silently turns detection off — the text-only gate below cannot +/// see detector defects at all. +#[test] +fn every_case_is_detectable_end_to_end() { + let corpus = load_corpus(); + let mut undetected = Vec::new(); + for case in &corpus { + if predict_detected(case).is_none() { + undetected.push((case.language.clone(), case.text.clone())); + } + } + assert!( + undetected.is_empty(), + "{} of {} corpus cases were not detected end-to-end:\n{}", + undetected.len(), + corpus.len(), + undetected + .iter() + .map(|(lang, text)| format!( + " [{lang}] {text:?}\n snippet: {:?}", + synthesize_source( + corpus + .iter() + .find(|c| &c.text == text && &c.language == lang) + .expect("case round-trips") + ) + )) + .collect::>() + .join("\n") + ); +} + +/// The same F1 floor, measured through the production path so context-aware +/// rules are actually exercised. +#[test] +fn detected_path_reaches_f1_threshold() { + let corpus = load_corpus(); + let verdicts: Vec<_> = corpus + .iter() + .map(|case| { + predict_detected(case) + .unwrap_or_else(|| panic!("case not detected: [{}] {:?}", case.language, case.text)) + }) + .collect(); + let report = evaluate(&corpus, &verdicts); + + eprintln!("=== detected-path per-kind (correct / predicted) ==="); + for (kind, m) in &report.by_kind { + let precision = if m.predicted == 0 { + 1.0 + } else { + f64::from(m.correct) / f64::from(m.predicted) + }; + eprintln!( + " {kind}: {}/{} predicted (precision {precision:.3})", + m.correct, m.predicted + ); + } + + let f1 = report.overall; + assert!( + f1.score >= 0.85, + "detected-path F1 = {:.3} (precision {:.3}, recall {:.3})", + f1.score, + f1.precision, + f1.recall + ); +} + +#[test] +fn classifier_reaches_f1_threshold() { + let corpus = load_corpus(); + let verdicts: Vec<_> = corpus.iter().map(predict).collect(); + let report = evaluate(&corpus, &verdicts); + + eprintln!("=== per-kind (correct / predicted) ==="); + for (kind, m) in &report.by_kind { + let precision = if m.predicted == 0 { + 1.0 + } else { + f64::from(m.correct) / f64::from(m.predicted) + }; + eprintln!( + " {kind}: {}/{} predicted (precision {precision:.3})", + m.correct, m.predicted + ); + } + + eprintln!("=== per-language (tp/fp/fn) ==="); + for (lang, m) in &report.by_language { + let precision = f64::from(m.tp) / f64::from(m.tp + m.fp); + let recall = f64::from(m.tp) / f64::from(m.tp + m.fn_count); + eprintln!( + " {lang}: tp {} fp {} fn {} (precision {precision:.3}, recall {recall:.3})", + m.tp, m.fp, m.fn_count + ); + } + + let f1 = report.overall; + assert!( + f1.score >= 0.85, + "F1 = {:.3} (precision {:.3}, recall {:.3})", + f1.score, + f1.precision, + f1.recall + ); + + // Per-kind floor: any kind predicted at least `MIN_BUCKET` times must hit a + // minimum precision/recall. Without a floor, a perfectly-recalled restate + // count hides a kind that always falsely-convicts. + let min_bucket: u32 = 3; + let min_precision: f64 = 0.5; + for (kind, m) in &report.by_kind { + if m.predicted < min_bucket { + continue; + } + let p = f64::from(m.correct) / f64::from(m.predicted); + assert!( + p >= min_precision, + "kind `{kind}` precision {:.3} < {:.3} (predicted {}, correct {})", + p, + min_precision, + m.predicted, + m.correct + ); + } +} diff --git a/crates/comment-checker/tests/pipeline.rs b/crates/comment-checker/tests/pipeline.rs new file mode 100644 index 0000000..0b4d176 --- /dev/null +++ b/crates/comment-checker/tests/pipeline.rs @@ -0,0 +1,73 @@ +//! Composition tests: the flag/spare decision through the whole pipeline +//! (decode → detect → classify → report), at the `check` seam (CONST-T1). + +use claude_code_comment_checker::{Outcome, check}; + +fn write(file_path: &str, content: &str) -> String { + let content = content + .replace('\\', "\\\\") + .replace('"', "\\\"") + .replace('\n', "\\n"); + format!( + r#"{{"tool_name":"Write","tool_input":{{"file_path":"{file_path}","content":"{content}"}}}}"# + ) +} + +#[test] +fn unnecessary_comment_blocks() { + let input = write("foo.py", "x = 1 # adds one to one\n"); + assert!(matches!(check(&input, ""), Outcome::Block { .. })); +} + +#[test] +fn justified_directive_passes() { + let input = write("foo.py", "x = 1 # noqa: E501\n"); + assert!(matches!(check(&input, ""), Outcome::Pass { .. })); +} + +#[test] +fn license_header_passes() { + let input = write("foo.py", "# SPDX-License-Identifier: MIT\nx = 1\n"); + assert!(matches!(check(&input, ""), Outcome::Pass { .. })); +} + +#[test] +fn no_comments_passes() { + let input = write("foo.py", "x = 1\n"); + assert!(matches!(check(&input, ""), Outcome::Pass { .. })); +} + +#[test] +fn non_code_file_passes() { + let input = write("README.txt", "some comment here\n"); + assert!(matches!(check(&input, ""), Outcome::Pass { .. })); +} + +#[test] +fn invalid_json_passes() { + assert!(matches!(check("not json", ""), Outcome::Pass { .. })); +} + +#[test] +fn edit_keeps_existing_comment_and_passes() { + let input = r#"{"tool_name":"Edit","tool_input":{"file_path":"foo.py","old_string":"x = 1 # keep me\n","new_string":"x = 2 # keep me\n"}}"#; + assert!(matches!(check(input, ""), Outcome::Pass { .. })); +} + +#[test] +fn edit_new_comment_blocks() { + let input = r#"{"tool_name":"Edit","tool_input":{"file_path":"foo.py","old_string":"x = 1\n","new_string":"x = 1 # TODO: handle this\n"}}"#; + assert!(matches!(check(input, ""), Outcome::Block { .. })); +} + +#[test] +fn report_names_the_reason() { + let input = write("foo.go", "// TODO: refactor later\n"); + let Outcome::Block { report } = check(&input, "") else { + panic!("expected a block"); + }; + assert!( + report.contains("no tracked reference"), + "report was: {report}" + ); +} diff --git a/docs/plans/2026-08-12-002-feat-sota-comment-adjudication-plan.md b/docs/plans/2026-08-12-002-feat-sota-comment-adjudication-plan.md new file mode 100644 index 0000000..c606c21 --- /dev/null +++ b/docs/plans/2026-08-12-002-feat-sota-comment-adjudication-plan.md @@ -0,0 +1,282 @@ +--- +artifact_contract: ce-unified-plan/v1 +artifact_readiness: implementation-ready +product_contract_source: ce-brainstorm +execution: code +created: 2026-08-12 +updated: 2026-08-12 +type: feat +status: implementation-ready +--- + +# State-of-the-Art Comment Adjudication - Plan + +**Product Contract preservation:** changed — added **R5 (context-aware adjudication)** and enriched R1/R2 to require code context, per the user's "be more ambitious (under the current constraints)" directive. R3 (deterministic local engine) and R4 (recall) preserved; the ambition stays within all constraints. The adjudicator remains rule-based, not learned. + +## Goal Capsule + +- **Objective:** Make comment-checker the state-of-the-art comment adjudicator by judging each comment **against its code**, not in isolation — catching restatements with cited evidence, sparing comments that add information the code lacks, on a measurement foundation that makes quality visible. +- **Product authority:** User-directed. The author-LLM cannot be trusted to judge its own comments; the product is an independent adjudicator. "State of the art" means verdict *correctness* and *trustworthiness* (determinism, locality, airtightness). +- **Open blockers:** None. + +## Problem Frame + +The hook exists because the author-LLM is a biased judge of its own comments; the product is an independent adjudicator the author cannot sweet-talk. The adjudication authority — the Ousterhout/APOSD rubric the corpus is labeled against — is fundamentally about **the relationship between a comment and its code**: a good comment adds information the code lacks (lives at a *higher* abstraction level — why, constraints, invariants); a bad one restates the code at the *same* level. + +The current classifier judges **comment text in isolation**. That is provably insufficient: you cannot detect "restates the code" without the code, so `RestatesCode` is today only a catch-all fallback (`crates/comment-checker/src/classify.rs:89`) that never compares a comment to anything. Meanwhile `detect_comments` (`crates/comment-checker/src/detect.rs:26`) already parses the full file into a tree-sitter Tree and then **discards it** after extracting comment text. + +**The leap:** make the adjudicator *context-aware* — enrich each comment with its structural position, scope, and adjacent code from the AST already in hand, and classify the comment *against* that context. Deterministic, local, fast (tree-sitter is already in the path; no new parse), no network, rule-based not learned — within every constraint. It lifts both precision (spare a comment that adds info the code lacks) and recall (catch a restatement with *evidence* — the overlapping tokens — so the verdict is un-arguable). + +Hard invariant (R3): the runtime adjudicator stays a deterministic local rule engine — no network, no LLM in the verdict path, not learned. The new context comes from the local AST. + +**Scope constraint on edits:** `Write` gives the whole file, so full structural context. `Edit`/`MultiEdit` run `new_comments` (`check.rs:62`) on the edited fragment only, so context there is *fragment-bounded* — present but possibly incomplete at the fragment edge (a comment near the boundary may reference code outside the fragment). Context-aware rules must not convict on incomplete context; the text-only floor applies where context is unreliable. + +## Requirements + +- **R1 — Measurement foundation (eval as specification).** Quality measurable per-kind and per-language, with a confusion matrix, on a **context-bearing** single-source corpus (comment + adjacent code + position) that grows from real disagreements and carries **kind-level** ground truth (not just binary). +- **R2 — Precision moat (never convict a legitimate comment).** A comment that adds information the code lacks is spared; API-doc text is recognized in any comment type. Every flag's reason is specific and checkable. +- **R3 — Adjudication trust (deterministic local engine).** Runtime adjudicator is a deterministic local rule engine — no network, no LLM, not learned. Context comes from the local AST. +- **R4 — Recall lift.** Catch genuinely-unnecessary comments the rules miss by growing rule coverage from the living corpus — deterministically, with evidence, including paraphrased restatement (comment verb → code operator), not only literal token overlap. +- **R5 — Context-aware adjudication (the ambition).** The classifier reasons over comment-vs-code, not comment text alone: position, scope, and adjacent-code comparison drive the verdict. + +Success criteria: + +- The gate reports per-kind and per-language precision/recall on a single-source, context-bearing corpus. +- A comment that merely restates its adjacent code — literally or paraphrased — is flagged with the specific evidence cited. +- A comment that adds higher-abstraction info the code lacks (why, constraint, intent) is spared even when it shares surface words with the code. +- The runtime adjudicator remains a deterministic local binary — no network, no LLM, not learned. +- Context-aware rules degrade gracefully on `Edit`/`MultiEdit` (fragment-bounded context). + +## Key Decisions + +**KD1 — Sequencing: R1 (measure) → R5 (context-aware core) → R2 (precision) → R4 (recall), with R3 the invariant.** Measurement first; the context-aware core depends on a context-bearing corpus to be testable. + +**KD2 — The adjudicator is a deterministic rule engine, not an LLM and not learned.** No LLM in the runtime path; context-aware ≠ learned — it is richer deterministic rules over richer input (the AST). The README's "rule-based, not learned" identity is preserved. *(session-settled: user-directed — chosen over a runtime LLM and over a bundled model: both violate the no-network / rule-based identity.)* + +**KD3 — Binary verdicts with a rule-vocabulary reason plus evidence, not scored judgments.** A restatement flag cites the overlapping tokens, making it un-arguable. + +## Key Technical Decisions + +**KTD1 — The corpus becomes context-bearing, single-source, and kind-labeled.** Each case carries the comment, its adjacent code + position/scope, and a **kind-level** ground-truth label (the specific `UnnecessaryKind`/`Justification`), so per-kind precision/recall floors have ground truth to measure against — a binary Unnecessary/Justified label cannot produce per-kind floors. One source at `eval/corpus.json`, loaded by the test. + +**KTD2 — Structural context is captured during the tree-sitter walk already happening.** `detect_comments` builds the full Tree; enrich each comment with its adjacent code text (the declaration/statement it precedes or sits in), scope (module / function / nested-block), and position role (docstring-head / leading / trailing / inline) during that walk. Zero new parsing. + +**KTD3 — "Restates the code" becomes an evidence-backed comparison, not a fallback.** Tokenize the adjacent code (identifiers, operators, literals) and the comment; high lexical overlap with no higher-abstraction content (no intent/constraint/why marker) → `RestatesCode` with the overlapping tokens cited. A deterministic **synonym/operator table** maps comment verbs to code operators (`increment`↔`+=`, `decrement`↔`-=`, `assign`↔`=`, `returns`↔`return`) so *paraphrased* restatement is caught too — literal token overlap alone misses the common case. Still a static rule table: deterministic, local, rule-based. This is the precision+recall leap and the direct expression of Ousterhout's same-vs-higher-abstraction distinction. + +**KTD4 — Justification is position/scope-aware.** A docstring at a public function's head is high-value even without `@param`; a restatement inside a loop body is noise. Context qualifies the verdict. API-doc markup is recognized in any comment type (not only `CommentType::Docstring`). + +--- + +## High-Level Technical Design + +```mermaid +flowchart LR + A["file content
(hook payload)"] --> B["tree-sitter parse
(already in detect_comments)"] + B --> C["extract comments +
enrich structural context
(adjacent code, scope, position role)"] + C --> D["context-aware classify
justification rules × context
restate-detection (lexical + operator table)"] + D --> E{"verdict"} + E -->|"adds info code lacks"| F["pass — keep"] + E -->|"restates code"| G["block — cite overlap / operator match"] + E -->|"other unnecessary"| H["block — specific reason"] +``` + +The one new stage is **context enrichment (C)**, which rides on the parse that already happens. The classifier (D) changes from a text-only fold to a fold that also consumes context; the restate detector compares comment tokens to adjacent-code tokens lexically *and* via the synonym/operator table. All deterministic, all local. + +--- + +## Implementation Units + +### U1. Context-bearing single-source corpus and per-kind/per-language gate + +**Goal:** Make quality measurable per-kind and per-language, on one canonical corpus that carries the code context and kind-level labels the new classifier needs. + +**Requirements:** R1, R5. + +**Dependencies:** None. + +**Files:** +- `eval/corpus.json` — canonical source; case schema grows to include adjacent code + position/scope and a kind-level label. +- `crates/comment-checker/tests/common/mod.rs` — load from JSON; extend `F1`/`compute_f1` to a per-kind + per-language breakdown and confusion matrix. +- `crates/comment-checker/tests/f1.rs` — assert overall F1 ≥ 0.85 **and** per-kind floors. + +**Approach:** +- Make `eval/corpus.json` the single source; the test loads it (`include_str!` + deserialize). Remove the embedded `CORPUS` duplicate. +- Grow the case schema: each case carries the comment, the adjacent code it annotates, its position/scope, language, comment type, and a **kind-level** ground-truth label (specific `UnnecessaryKind`/`Justification`) — not just binary. Per-kind floors require kind-level labels (KTD1). +- `compute_f1` accumulates tp/fp/fn per outcome kind and per language and emits a confusion matrix; the gate asserts per-kind floors, so a weak kind can't hide in the average. + +**Test scenarios:** +- Loading JSON yields a context-bearing, kind-labeled case set; a newly appended case appears in the next run. +- The gate prints per-kind and per-language precision/recall. +- A deliberately reclassified case trips a per-kind floor even when overall F1 stays ≥ 0.85. +- Malformed JSON fails loudly; a kind with zero cases reports gracefully. + +**Verification:** Gate shows the matrix; a forced per-kind regression fails the floor; exactly one corpus definition exists. + +### U2. Structural-context extraction from the AST already parsed + +**Goal:** Give the classifier the code context it currently throws away — adjacent code, scope, and position per comment — at no new parse cost. + +**Requirements:** R5. + +**Dependencies:** U1 (context shape is defined by the corpus schema). + +**Files:** +- `crates/comment-checker/src/detect.rs` — `collect_comments`/`detect_comments` enrich each comment with context during the existing walk. +- `crates/comment-checker/src/comment.rs` — `Comment` (or a sibling context type) gains adjacent-code, scope, and position fields. +- `crates/comment-checker/src/check.rs` — thread context through `detect_for` → `flag_unnecessary`. +- `crates/comment-checker/src/classify.rs` — `classify` consumes context. + +**Approach:** +- During the existing tree-sitter walk, capture per comment: the declaration/statement it precedes or sits in (adjacent code text), its scope (module / function / nested-block depth), and its position role (docstring-head / leading / trailing / inline). +- The Python docstring path (`collect_docstrings` / `PYTHON_DOCSTRING_QUERY`) captures only the docstring node; extend its query captures to also bind the adjacent declaration so Python docstrings get adjacent-code context, not just comment nodes. +- Carry these on the `Comment` (or a parallel context passed alongside). `classify` receives them. +- Degrade gracefully: context on `Edit`/`MultiEdit` is **fragment-bounded** — present but possibly incomplete at the fragment edge. Context-aware rules must not convict when the adjacent code is truncated at the fragment boundary; the text-only floor applies there. + +**Execution note:** Build context extraction test-first against a few hand-built ASTs; confirm `Write` gets full context and `Edit` marks fragment-edge context as unreliable before touching the classifier. + +**Test scenarios:** +- A docstring at a function head reports position `docstring-head` and the function signature as adjacent code. +- A trailing `// increment` inside a loop body reports scope = nested-block and the statement as adjacent code. +- An `Edit` fragment whose comment sits at the fragment edge reports context as unreliable (no conviction on incomplete adjacent code; text-only path used). + +**Verification:** Context fields are populated for `Write`; fragment-edge context is flagged unreliable on edits, never silently trusted. + +### U3. Context-aware "restates the code" detection with evidence + +**Goal:** Make the context-aware comparison the primary restatement path — literal *and* paraphrased — while retaining a terminal text-only rule for zero-overlap filler comments. + +**Requirements:** R4, R5 (R3 invariant). + +**Dependencies:** U1, U2. + +**Files:** +- `crates/comment-checker/src/classify.rs` — new restate detector consuming context; keep the text-only fallback as a terminal rule, not removed. +- `crates/comment-checker/src/comment.rs` — `UnnecessaryKind::RestatesCode` carries the cited overlapping tokens (evidence). +- `crates/comment-checker/src/report.rs` — render the cited tokens in the block report. + +**Approach:** +- Tokenize the adjacent code (identifiers, operators, literals) and the comment. +- Two match paths produce `RestatesCode` evidence: **lexical** overlap of comment tokens with code tokens, and **operator** matches from the deterministic synonym/operator table (`increment`↔`+=`, `decrement`↔`-=`, `assign`↔`=`, `returns`↔`return`) per KTD3. +- High lexical/operator overlap *and* no higher-abstraction content (no intent/constraint/why marker, no API-doc markup) → `RestatesCode`, with the matched tokens cited as evidence so the report can show them. +- Zero-overlap filler — no lexical/operator match, no operator-table verb, no justification marker — is still flagged by a retained terminal text-only rule; the context-aware detector is the primary path, not the only path. +- A comment that shares words but adds info the code lacks (intent, constraint, invariant, "why") is **spared** — the overlap alone does not convict. +- Directional sketch (not spec): overlap = |comment_tokens ∩ code_tokens| / |comment_content_tokens|, gated below a tuned threshold and suppressed when any justification marker is present. Threshold tuned against the corpus and locked by a per-kind floor. + +**Execution note:** Tune the overlap threshold against U1's corpus; the per-kind precision floor is the acceptance gate, not a guessed constant. + +**Test scenarios:** +- `// counter` next to `counter += 1` → flagged, citing `counter` (lexical overlap). +- `// increment the counter` next to `counter += 1` → flagged, citing `counter` (lexical) and `increment`↔`+=` (operator table) — paraphrased restatement caught. +- `// throttle to avoid the rate limit` next to the same line → **spared** (adds a constraint/why the code lacks), even though it shares words. +- `// returns the user` next to `fn user()` → flagged (restates signature), citing `user` (lexical overlap). +- A justified comment with incidental word overlap is not convicted (precision floor holds). +- Mutation score on `classify.rs` stays 100%. + +**Verification:** Per-kind recall on `RestatesCode` rises; precision floor holds; each flag cites tokens; mutants green. + +### U4. Position/scope-aware justification and API-doc in any comment type + +**Goal:** A comment's legitimacy judged by where it sits, and API-doc text recognized regardless of comment syntax. + +**Requirements:** R2. + +**Dependencies:** U2. + +**Files:** +- `crates/comment-checker/src/classify.rs` — `is_public_api_doc` uses position/scope; recognize DOC_MARKUP in any comment type at line-start. +- `crates/comment-checker/tests/common/mod.rs` — corpus cases. + +**Approach:** +- `is_public_api_doc` (classify.rs:139) currently requires `CommentType::Docstring`; broaden to also accept a docstring-*position* (head of a public declaration, per U2) and DOC_MARKUP at line-start in any comment type. +- Position-aware: a restatement at a function head may still be a legitimate interface comment; a restatement inside a body is noise. Context qualifies the verdict. + +**Test scenarios:** +- `# Returns: the user` (Line, Ruby/R) → `Justified { PublicApiDoc }`. +- A docstring-head comment on a public function is recognized as interface doc. +- A prose comment mentioning `@param` mid-sentence is not over-justified. +- Precision floor holds or improves. + +**Verification:** Per-kind precision unchanged or improved; non-docstring API docs no longer false-convicted. + +### U5. Recall growth from the living context-bearing corpus + +**Goal:** Catch unnecessary-comment shapes the current kinds miss, now powered by code context. + +**Requirements:** R4. + +**Dependencies:** U1, U3. + +**Files:** +- `crates/comment-checker/src/comment.rs` — new `UnnecessaryKind` variant(s). +- `crates/comment-checker/src/classify.rs` — new predicate(s) + marker table, context-using. +- `crates/comment-checker/tests/common/mod.rs` — corpus cases. + +**Approach:** +- Mine the living context-bearing corpus and real disagreements for shapes not covered (AgentMemo, CommentedOutCode, VacuousTodo, RestatesCode), per Ousterhout. +- Candidate kinds (directional — confirm against the corpus): *narrates control flow* (`// loop and filter` beside the loop), *narrates the signature* (`// count: int` beside `count: int`). Context (U2) makes these detectable with evidence. +- Deterministic, local, mutation-tested. + +**Execution note:** Confirm each candidate against the corpus before encoding it; do not add speculative kinds. + +**Test scenarios:** +- A corpus case of each new kind is flagged with its specific reason. +- A justified comment sharing surface markers is not mis-flagged (precision floor holds). +- Mutation score on `classify.rs` stays 100%. + +**Verification:** Per-kind recall improves; precision floor holds; mutants green. + +--- + +## Risk Analysis & Mitigation + +- **Restate-detection over/under-fires (U3, highest risk).** *Mitigation:* the per-kind precision *and* recall floors (U1) gate it; the threshold is tuned against the corpus, not guessed; mutation testing on `classify.rs` pins behavior. Ship behind the floor, not a constant. +- **Fragment-bounded context on `Edit`/`MultiEdit` (U2).** *Mitigation:* context is flagged unreliable at the fragment edge; the text-only rule floor remains, so edits never regress below today's behavior and never convict on incomplete adjacent code. +- **Corpus schema growth is a one-time migration (U1).** *Mitigation:* the existing 50 text-only cases each get their adjacent code **authored** and their label **re-verified** under the context-aware, kind-level rubric — not a purely mechanical migration; the gate proves parity before any classifier change lands. +- **Ambition creep beyond one plan.** *Mitigation:* file-level / cross-comment signals (duplicate docstrings, section-header runs) are deferred — this plan's core is per-comment adjacent-code context. + +## Verification Contract + +Run in order (fail fast): + +1. `cargo fmt --check && cargo clippy --all-targets -- -D warnings && cargo test --all-targets` (repo gate). +2. The per-kind + per-language confusion-matrix gate (U1) is green, including per-kind floors. +3. `cargo mutants --file crates/comment-checker/src/classify.rs --timeout 90` stays 100% (U2–U5 change the classifier). + +## Definition of Done + +- Context-bearing, kind-labeled single-source corpus + per-kind/per-language confusion-matrix gate live (U1). +- Each comment carries structural context (adjacent code, scope, position) from the AST already parsed, flagged unreliable at fragment edges (U2). +- "Restates the code" is an evidence-backed comparison — the primary path — with a terminal text-only rule retained for zero-overlap filler (U3). +- Justification is position/scope-aware; API-doc markup works in any comment type (U4). +- At least one new recall kind is mined and added (U5), or the corpus analysis documents that no new kind is justified. +- Mutation score on `classify.rs` is 100%; repo gate is green; the adjudicator is unchanged as a deterministic, local, rule-based binary (R3). + +## Assumptions + +- (Auto-proceeded scoping gate per the user's standing "stop asking" + explicit "be more ambitious" directive.) The overlap threshold for U3 is a corpus-tuned value, locked by the per-kind floor — not a plan-time constant. +- The corpus schema grows once; the existing cases' adjacent code is authored and their labels re-verified during that migration. + +## Open Questions (deferred to implementation) + +- The concrete overlap metric, operator-table coverage, and threshold for U3 — tuned against the corpus, locked by the floor. +- Whether `Edit`/`MultiEdit` can ever recover fuller context (e.g., reading the file on disk) — out of scope here; fragment-bounded context is the floor. +- Whether `#`/`--` API-doc comments need AST "is-above-a-declaration" context vs the line-start heuristic (U4) — start heuristic-first. +- File-level / cross-comment signals (duplicate docstrings, section-divider runs) — deferred to a follow-up. + +## Scope Boundaries + +### In scope +- Context-aware adjudication: structural context extraction + evidence-backed restate detection (lexical + operator table) + position/scope-aware justification. +- Context-bearing, kind-labeled single-source corpus + per-kind/per-language confusion-matrix gate. +- Recall growth via new deterministic, context-powered rules. + +### Out of scope / Deferred to follow-up +- File-level / cross-comment signals (duplicate docstrings, section-divider runs). +- Any LLM or learned model in the runtime verdict path (rejected: violates R3 and the rule-based identity). +- Adding languages beyond the current 37; the npm distribution layer; the hook contract / exit codes; the `--prompt` UX. + +## Sources & Research + +- `software-wiki/entities/eval-criteria-design.md` — eval as specification; living golden set; binary verdicts with reasoning; calibrate for correct triggers, not more. +- `software-wiki/entities/ousterhout-aposd-extract.md` — the rubric the corpus is labeled against: good comments live at a higher abstraction level than the code (add info it lacks); bad ones restate it. This is the authority for context-aware adjudication. +- Codebase: `crates/comment-checker/src/detect.rs` (full Tree built, then discarded), `crates/comment-checker/src/classify.rs` (text-only fold; `RestatesCode` is a fallback at line 89), `crates/comment-checker/src/comment.rs` (`Comment`/`CommentType`/`UnnecessaryKind`), `crates/comment-checker/src/check.rs` (`Write` full content; `Edit`/`MultiEdit` fragment-only via `new_comments`), `crates/comment-checker/tests/common/mod.rs` (corpus + `compute_f1`), `crates/comment-checker/tests/f1.rs` (single-F1 gate). diff --git a/eval/corpus.json b/eval/corpus.json new file mode 100644 index 0000000..51f2d87 --- /dev/null +++ b/eval/corpus.json @@ -0,0 +1,52 @@ +[ + {"text": "#!/usr/bin/env python", "language": "python", "comment_type": "line", "kind": "Shebang"}, + {"text": "#!/bin/bash", "language": "bash", "comment_type": "line", "kind": "Shebang"}, + {"text": "# noqa: E501", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// @ts-ignore", "language": "typescript", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# pyright: ignore", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// eslint-disable-next-line", "language": "javascript", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# type: ignore", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# shellcheck disable=SC2086", "language": "bash", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// nolint:golint", "language": "go", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// clippy::too_many_arguments", "language": "rust", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "/* istanbul ignore next */", "language": "javascript", "comment_type": "block", "kind": "LinterDirective"}, + {"text": "// SPDX-License-Identifier: MIT", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, + {"text": "// Copyright (c) 2024 Example Corp. All rights reserved.", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, + {"text": "# given", "language": "python", "comment_type": "line", "kind": "BddStep"}, + {"text": "// when & then", "language": "go", "comment_type": "line", "kind": "BddStep"}, + {"text": "// workaround: the SDK panics on empty input", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// Why: the offset is 1-based, not 0-based", "language": "go", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "# because SQLite locks the whole file, batch the writes", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// to avoid the TOCTOU race, open before checking", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "# !NOTE: keep 8MB below 32-bit overflow", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// @author Jane Doe", "language": "rust", "comment_type": "line", "kind": "Attribution"}, + {"text": "// ref: https://github.com/systemfsoftware/claude-code-comment-checker", "language": "go", "comment_type": "line", "kind": "Attribution"}, + {"text": "\"\"\"Fetches a user.\n Args:\n id: the user id.\n \"\"\"", "language": "python", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "/**\n * @param {string} name\n * @returns {number}\n */", "language": "javascript", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "/** Returns the sum.\n * @param a first addend\n * @return a+b\n */", "language": "java", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "// THIS FILE IS AUTO-GENERATED - DO NOT EDIT", "language": "go", "comment_type": "line", "kind": "GeneratedFile"}, + {"text": "// adds one to one", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// this will be true", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# Send a notification", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "## Returns the square of x", "language": "ruby", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# section: argument parsing helpers", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "\"\"\"This is a module docstring.\"\"\"", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, + {"text": "\"\"\"Fetch the user.\"\"\"", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, + {"text": "// fmt.Println(\"debug\")", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "# print(x) # debug", "language": "python", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "// x = x + 1", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "// TODO: FIX THIS", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// TODO: fix this later", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "# TODO: handle the empty-list edge case", "language": "python", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// FIXME: crashes on Windows paths", "language": "rust", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// Changed from old_value to new_value", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "# Modified to use new implementation", "language": "python", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Updated from v1 to v2", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Refactored for better performance", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Added new validation logic", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Removed deprecated function", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Implemented new feature", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// This is a comment", "language": "javascript", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// This is a Go comment", "language": "go", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "/* This is a block comment */", "language": "typescript", "comment_type": "block", "kind": "RestatesCode"} +] From c00e9c0b362852fe6954f9b4a0ab0a1edf0cae83 Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 15:50:57 +0000 Subject: [PATCH 02/11] feat(eval): context-bearing corpus with per-kind/per-language gate (U1) Each corpus case now carries the adjacent code it annotates, its position and scope, so the gate exercises real parse->detect->classify against context-bearing code instead of comment text in isolation. - eval/corpus.json: 50 cases re-authored with authored context; labels re-verified under the kind-level rubric. Attribution vs intent marker precedence fixed: 'ref:'/'source:' provenance now classifies as Attribution, not NonObviousIntent (the old per-kind view hid a 2-case kind with no floor to trip). - tests/common: schema grows (code, position, scope); synthesize_source embeds the authored context; evaluate() reports per-kind actual / predicted / correct (recall now has a denominator) and per-language tp/fp/fn; per_kind_violations asserts precision and recall floors on every kind with at least 2 cases. - tests/f1: both the detected and the text-only path gate F1 >= 0.85 and the per-kind floors; malformed corpus fails loudly; zero-case kinds report gracefully; a crafted regression proves a kind-level failure trips the floor while the overall F1 stays above threshold. --- crates/comment-checker/src/classify.rs | 11 +- crates/comment-checker/tests/common/mod.rs | 183 ++++++++++++----- crates/comment-checker/tests/f1.rs | 221 ++++++++++++++------- eval/corpus.json | 102 +++++----- 4 files changed, 340 insertions(+), 177 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index cb6f68d..e9ae342 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -40,14 +40,14 @@ static JUSTIFIED: &[Rule] = &[ reason: Justification::PublicApiDoc, matches: is_public_api_doc, }, - Rule { - reason: Justification::NonObviousIntent, - matches: is_non_obvious_intent, - }, Rule { reason: Justification::Attribution, matches: is_attribution, }, + Rule { + reason: Justification::NonObviousIntent, + matches: is_non_obvious_intent, + }, ]; /// Rules that mark a comment unnecessary, in priority order. @@ -408,7 +408,6 @@ const INTENT_MARKERS: &[&str] = &[ "security", "thread-safety", "thread safety", - "ref:", "@link", ]; @@ -421,6 +420,8 @@ const ATTRIBUTION_MARKERS: &[&str] = &[ "credit", "@see", "@link", + "ref:", + "source:", ]; const AGENT_MEMO_PREFIXES: &[&str] = &[ diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs index de198b0..1df0938 100644 --- a/crates/comment-checker/tests/common/mod.rs +++ b/crates/comment-checker/tests/common/mod.rs @@ -1,15 +1,19 @@ //! Shared evaluation corpus and helpers (used by the F1 gate). //! //! The corpus is loaded from `eval/corpus.json` — the single source of truth -//! (CONST-E1). Each case carries a kind-level ground-truth label so the gate -//! can report per-kind and per-language precision/recall, not just one number. +//! (CONST-E1). Each case carries a kind-level ground-truth label plus the +//! structural context (adjacent code, position, scope) the classifier needs, +//! so the gate exercises the real parse → detect → classify path against +//! context-bearing code, not comment text in isolation. #![allow(dead_code)] use std::collections::BTreeMap; use claude_code_comment_checker::classify::classify; use claude_code_comment_checker::detect::detect_comments; -use claude_code_comment_checker::{Comment, CommentType, Justification, UnnecessaryKind, Verdict}; +use claude_code_comment_checker::{ + Comment, CommentType, Justification, PositionRole, Scope, UnnecessaryKind, Verdict, +}; use serde::Deserialize; #[derive(Clone, Copy, Debug, Eq, PartialEq)] @@ -21,8 +25,12 @@ pub enum Label { /// A single evaluation case, loaded from the canonical corpus JSON. pub struct Case { pub text: String, + /// The code this comment annotates, as the detector should capture it. + pub code: String, + pub position: PositionRole, + pub scope: Scope, pub language: String, - pub comment_type: CommentType, + pub comment_type: CommentKind, /// Ground-truth kind: the specific `Justification`/`UnnecessaryKind` name. pub kind: String, pub label: Label, @@ -31,28 +39,48 @@ pub struct Case { #[derive(Deserialize)] struct RawCase { text: String, + code: String, + position: String, + scope: String, language: String, comment_type: String, kind: String, } -/// Load the canonical corpus from `eval/corpus.json`. -pub fn load_corpus() -> Vec { - let raw: Vec = serde_json::from_str(include_str!("../../../../eval/corpus.json")) - .expect("eval/corpus.json must be valid JSON"); +fn parse_position(value: &str) -> PositionRole { + match value { + "docstring-head" => PositionRole::DocstringHead, + "leading" => PositionRole::Leading, + "trailing" => PositionRole::Trailing, + "inline" => PositionRole::Inline, + other => panic!("unknown position: {other}"), + } +} + +fn parse_scope(value: &str) -> Scope { + match value { + "module" => Scope::Module, + "function" => Scope::Function, + "nested" => Scope::NestedBlock, + other => panic!("unknown scope: {other}"), + } +} + +/// Parse a corpus JSON document. Separated from [`load_corpus`] so malformed +/// input can be tested without touching the canonical file. +pub fn parse_corpus(json: &str) -> Vec { + let raw: Vec = + serde_json::from_str(json).expect("corpus JSON must parse as a case array"); raw.into_iter() .map(|r| { - let comment_type = match r.comment_type.as_str() { - "line" => CommentType::Line, - "block" => CommentType::Block, - "docstring" => CommentType::Docstring, - other => panic!("unknown comment_type: {other}"), - }; let label = kind_label(&r.kind); Case { text: r.text, + code: r.code, + position: parse_position(&r.position), + scope: parse_scope(&r.scope), language: r.language, - comment_type, + comment_type: parse_comment_type(&r.comment_type), kind: r.kind, label, } @@ -60,6 +88,38 @@ pub fn load_corpus() -> Vec { .collect() } +fn parse_comment_type(value: &str) -> CommentKind { + match value { + "line" => CommentKind::Line, + "block" => CommentKind::Block, + "docstring" => CommentKind::Docstring, + other => panic!("unknown comment_type: {other}"), + } +} + +/// The syntactic form of a comment, in the corpus vocabulary. +#[derive(Clone, Copy, Debug, Eq, PartialEq)] +pub enum CommentKind { + Line, + Block, + Docstring, +} + +impl CommentKind { + pub fn comment_type(self) -> CommentType { + match self { + CommentKind::Line => CommentType::Line, + CommentKind::Block => CommentType::Block, + CommentKind::Docstring => CommentType::Docstring, + } + } +} + +/// Load the canonical corpus from `eval/corpus.json`. +pub fn load_corpus() -> Vec { + parse_corpus(include_str!("../../../../eval/corpus.json")) +} + /// Binary label (justified vs unnecessary) for a kind name. pub fn kind_label(kind: &str) -> Label { match kind { @@ -70,44 +130,38 @@ pub fn kind_label(kind: &str) -> Label { } } -/// Classify a case's text in isolation (no structural context). +/// Classify a case's text in isolation (no structural context) — the text-only +/// floor, which must hold wherever context is unreliable. pub fn predict(case: &Case) -> Verdict { - let comment = Comment::new(case.text.clone(), 1, case.comment_type); + let comment = Comment::new(case.text.clone(), 1, case.comment_type.comment_type()); classify(&comment) } -/// A statement that parses on its own in `language`. -fn filler_statement(language: &str) -> &'static str { - match language { - "bash" => "x=1", - "typescript" | "javascript" => "const x = 1;", - "go" => "package main", - "rust" => "pub fn f() {}", - "java" => "class A { int x = 1; }", - _ => "x = 1", - } -} - -/// Wrap a case's comment in the smallest snippet that parses in its language -/// and yields exactly that comment, so the gate can exercise the real -/// parse → detect → classify path instead of hand-building a `Comment`. +/// Wrap a case's comment and its authored adjacent code in the smallest +/// snippet that parses in its language with the comment in the position the +/// case describes, so the gate exercises the real parse → detect → classify +/// path with context-bearing code. pub fn synthesize_source(case: &Case) -> String { let text = case.text.as_str(); - if case.comment_type == CommentType::Docstring { + let code = case.code.as_str(); + if case.comment_type == CommentKind::Docstring { return match case.language.as_str() { - // Python docstrings live at the head of a body. - "python" => format!("def f():\n {text}\n return 1\n"), + // Python docstrings live at the head of a module or body. + "python" if case.scope == Scope::Module => format!("{text}\n{code}\n"), + "python" => format!("def f():\n {text}\n {code}\n"), // Java doc comments must sit inside a class body. - "java" => format!("class A {{\n{text}\nint f() {{ return 1; }}\n}}\n"), + "java" => format!("class A {{\n{text}\n{code}\n}}\n"), // Brace languages: the doc comment precedes the declaration. - "typescript" | "javascript" => format!("{text}\nfunction f() {{}}\n"), - "go" => format!("package main\n\n{text}\nfunc F() {{}}\n"), - "rust" => format!("{text}\npub fn f() {{}}\n"), - other => format!("{text}\n{}\n", filler_statement(other)), + "typescript" | "javascript" | "rust" => format!("{text}\n{code}\n"), + "go" => format!("package main\n\n{text}\n{code}\n"), + other => panic!("no docstring snippet for language: {other}"), }; } - // Line and block comments lead an ordinary statement. - format!("{text}\n{}\n", filler_statement(case.language.as_str())) + match case.position { + PositionRole::Leading | PositionRole::DocstringHead => format!("{text}\n{code}\n"), + PositionRole::Trailing => format!("{code}\n{text}\n"), + PositionRole::Inline => format!("{code} {text}\n"), + } } /// The file name the synthesized snippet should be parsed as. @@ -192,15 +246,17 @@ pub struct F1 { #[derive(Debug, Default)] pub struct EvalReport { pub overall: F1, - pub by_kind: BTreeMap<&'static str, KindMetrics>, + pub by_kind: BTreeMap, pub by_language: BTreeMap, } #[derive(Debug, Default, Clone, Copy)] pub struct KindMetrics { + /// How many corpus cases carry this ground-truth kind. + pub actual: u32, /// How many cases the classifier assigned this kind. pub predicted: u32, - /// How many of those matched the ground-truth kind. + /// How many cases both carry and were assigned this kind. pub correct: u32, } @@ -228,7 +284,11 @@ pub fn evaluate(corpus: &[Case], verdicts: &[Verdict]) -> EvalReport { } let got_kind = verdict_kind(verdict); - let k = report.by_kind.entry(got_kind).or_default(); + // Ground-truth bucket independent of the prediction, so recall has a + // denominator; the predicted bucket counts assignments. + let actual_k = report.by_kind.entry(case.kind.clone()).or_default(); + actual_k.actual += 1; + let k = report.by_kind.entry(got_kind.to_owned()).or_default(); k.predicted += 1; if case.kind == got_kind { k.correct += 1; @@ -253,3 +313,36 @@ pub fn evaluate(corpus: &[Case], verdicts: &[Verdict]) -> EvalReport { }; report } + +/// The per-kind floor: any kind with at least `MIN_BUCKET` cases must reach +/// `MIN_KIND_PRECISION` precision and `MIN_KIND_RECALL` recall, so a weak kind +/// cannot hide inside the aggregate F1. Returns one violation string per +/// failing kind. +pub fn per_kind_violations(report: &EvalReport) -> Vec { + let mut violations = Vec::new(); + for (kind, m) in &report.by_kind { + if m.actual < MIN_BUCKET { + continue; + } + let precision = + f64::from(m.correct) / f64::from(if m.predicted == 0 { 1 } else { m.predicted }); + let recall = f64::from(m.correct) / f64::from(m.actual); + if precision < MIN_KIND_PRECISION { + violations.push(format!( + "kind `{kind}` precision {precision:.3} < {MIN_KIND_PRECISION} (predicted {}, correct {})", + m.predicted, m.correct + )); + } + if recall < MIN_KIND_RECALL { + violations.push(format!( + "kind `{kind}` recall {recall:.3} < {MIN_KIND_RECALL} (actual {}, correct {})", + m.actual, m.correct + )); + } + } + violations +} + +pub const MIN_BUCKET: u32 = 2; +pub const MIN_KIND_PRECISION: f64 = 0.5; +pub const MIN_KIND_RECALL: f64 = 0.5; diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs index 6b8f355..dc558e6 100644 --- a/crates/comment-checker/tests/f1.rs +++ b/crates/comment-checker/tests/f1.rs @@ -1,47 +1,43 @@ //! The F1 gate (CONST-E1): the classifier must reach F1 ≥ 0.85 on the -//! kind-labeled corpus, with per-kind and per-language visibility printed so a -//! weak kind or language cannot hide inside the aggregate. +//! kind-labeled, context-bearing corpus, with a printed per-kind and +//! per-language confusion matrix plus asserted per-kind precision/recall +//! floors, so a weak kind cannot hide inside the aggregate. mod common; -use common::{evaluate, load_corpus, predict, predict_detected, synthesize_source}; +use claude_code_comment_checker::{Justification, PositionRole, Scope, UnnecessaryKind, Verdict}; +use common::{ + Case, CommentKind, Label, evaluate, load_corpus, parse_corpus, per_kind_violations, predict, + predict_detected, +}; /// Every corpus case must survive the production path: parse a snippet in its -/// language, find the comment, classify it. This is the gate that fails when a -/// grammar bump silently turns detection off — the text-only gate below cannot -/// see detector defects at all. +/// language with its authored context, find the comment, classify it. This is +/// the gate that fails when a grammar bump silently turns detection off — the +/// text-only gate below cannot see detector defects at all. #[test] fn every_case_is_detectable_end_to_end() { let corpus = load_corpus(); - let mut undetected = Vec::new(); + let mut undetectable = Vec::new(); for case in &corpus { if predict_detected(case).is_none() { - undetected.push((case.language.clone(), case.text.clone())); + undetectable.push((case.language.clone(), case.text.clone())); } } assert!( - undetected.is_empty(), - "{} of {} corpus cases were not detected end-to-end:\n{}", - undetected.len(), - corpus.len(), - undetected + undetectable.is_empty(), + "{} corpus cases were not detected end-to-end:\n{}", + undetectable.len(), + undetectable .iter() - .map(|(lang, text)| format!( - " [{lang}] {text:?}\n snippet: {:?}", - synthesize_source( - corpus - .iter() - .find(|c| &c.text == text && &c.language == lang) - .expect("case round-trips") - ) - )) + .map(|(lang, text)| format!(" [{lang}] {text:?}")) .collect::>() .join("\n") ); } -/// The same F1 floor, measured through the production path so context-aware -/// rules are actually exercised. +/// The F1 floor and per-kind floors, measured through the production path so +/// context-aware rules are actually exercised. #[test] fn detected_path_reaches_f1_threshold() { let corpus = load_corpus(); @@ -52,52 +48,48 @@ fn detected_path_reaches_f1_threshold() { .unwrap_or_else(|| panic!("case not detected: [{}] {:?}", case.language, case.text)) }) .collect(); - let report = evaluate(&corpus, &verdicts); - - eprintln!("=== detected-path per-kind (correct / predicted) ==="); - for (kind, m) in &report.by_kind { - let precision = if m.predicted == 0 { - 1.0 - } else { - f64::from(m.correct) / f64::from(m.predicted) - }; - eprintln!( - " {kind}: {}/{} predicted (precision {precision:.3})", - m.correct, m.predicted - ); - } - - let f1 = report.overall; - assert!( - f1.score >= 0.85, - "detected-path F1 = {:.3} (precision {:.3}, recall {:.3})", - f1.score, - f1.precision, - f1.recall - ); + run_gate("detected path", &corpus, &verdicts); } +/// The same floors on the text-only path — the floor that must hold wherever +/// structural context is unreliable (Edit/MultiEdit fragments). #[test] fn classifier_reaches_f1_threshold() { let corpus = load_corpus(); let verdicts: Vec<_> = corpus.iter().map(predict).collect(); - let report = evaluate(&corpus, &verdicts); + run_gate("text-only path", &corpus, &verdicts); +} - eprintln!("=== per-kind (correct / predicted) ==="); +fn run_gate(name: &str, corpus: &[Case], verdicts: &[Verdict]) { + let report = evaluate(corpus, verdicts); + eprintln!("=== {name} ==="); + eprintln!( + "=== overall: precision {:.3}, recall {:.3}, F1 {:.3} ===", + report.overall.precision, report.overall.recall, report.overall.score + ); + eprintln!("=== per-kind (correct / actual / predicted) ==="); for (kind, m) in &report.by_kind { let precision = if m.predicted == 0 { 1.0 } else { f64::from(m.correct) / f64::from(m.predicted) }; + let recall = if m.actual == 0 { + 1.0 + } else { + f64::from(m.correct) / f64::from(m.actual) + }; eprintln!( - " {kind}: {}/{} predicted (precision {precision:.3})", - m.correct, m.predicted + " {kind}: {}/{} actual {} predicted (precision {precision:.3}, recall {recall:.3})", + m.correct, m.actual, m.predicted ); } - eprintln!("=== per-language (tp/fp/fn) ==="); for (lang, m) in &report.by_language { + if m.tp + m.fp + m.fn_count == 0 { + eprintln!(" {lang}: no unnecessary cases"); + continue; + } let precision = f64::from(m.tp) / f64::from(m.tp + m.fp); let recall = f64::from(m.tp) / f64::from(m.tp + m.fn_count); eprintln!( @@ -106,32 +98,109 @@ fn classifier_reaches_f1_threshold() { ); } - let f1 = report.overall; assert!( - f1.score >= 0.85, - "F1 = {:.3} (precision {:.3}, recall {:.3})", - f1.score, - f1.precision, - f1.recall + report.overall.score >= 0.85, + "{name} F1 = {:.3} (precision {:.3}, recall {:.3})", + report.overall.score, + report.overall.precision, + report.overall.recall ); - // Per-kind floor: any kind predicted at least `MIN_BUCKET` times must hit a - // minimum precision/recall. Without a floor, a perfectly-recalled restate - // count hides a kind that always falsely-convicts. - let min_bucket: u32 = 3; - let min_precision: f64 = 0.5; - for (kind, m) in &report.by_kind { - if m.predicted < min_bucket { - continue; - } - let p = f64::from(m.correct) / f64::from(m.predicted); - assert!( - p >= min_precision, - "kind `{kind}` precision {:.3} < {:.3} (predicted {}, correct {})", - p, - min_precision, - m.predicted, - m.correct - ); + let violations = per_kind_violations(&report); + assert!( + violations.is_empty(), + "per-kind floor violations on the {name}:\n{}", + violations.join("\n") + ); +} + +/// Malformed corpus JSON, unknown position, or unknown scope must fail loudly +/// at load, never silently score zero. +#[test] +fn malformed_corpus_fails_loudly() { + assert!( + std::panic::catch_unwind(|| parse_corpus("this is not json")).is_err(), + "malformed corpus must panic" + ); + assert!( + std::panic::catch_unwind(|| { + parse_corpus( + r##"[{"text":"# x","code":"x = 1","position":"sideways","scope":"module","language":"python","comment_type":"line","kind":"RestatesCode"}]"##, + ) + }) + .is_err(), + "unknown position must panic" + ); + assert!( + std::panic::catch_unwind(|| { + parse_corpus( + r##"[{"text":"# x","code":"x = 1","position":"leading","scope":"orbit","language":"python","comment_type":"line","kind":"RestatesCode"}]"##, + ) + }) + .is_err(), + "unknown scope must panic" + ); +} + +/// A kind with zero cases reports gracefully — no floor assertion fires and +/// there is no division by zero. +#[test] +fn zero_case_kind_reports_gracefully() { + let report = evaluate(&[], &[]); + assert!(report.by_kind.is_empty()); + assert!(per_kind_violations(&report).is_empty()); +} + +/// The per-kind floor must trip on a kind-level regression even when the +/// overall F1 stays ≥ 0.85 — a weak kind must not hide inside the average. +#[test] +fn per_kind_floor_catches_kind_level_regression() { + let mut corpus: Vec = (0..10) + .map(|_| synthetic_case("AgentMemo", Label::Unnecessary)) + .collect(); + corpus.extend((0..3).map(|_| synthetic_case("RestatesCode", Label::Unnecessary))); + + let mut verdicts: Vec = (0..10) + .map(|_| Verdict::Unnecessary { + reason: UnnecessaryKind::AgentMemo, + }) + .collect(); + // Two of the three restatement cases are kept (mis-justified): the kind's + // recall collapses while the overall F1 stays high on the AgentMemo pool. + verdicts.extend([ + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode, + }, + Verdict::Justified { + reason: Justification::NonObviousIntent, + }, + Verdict::Justified { + reason: Justification::NonObviousIntent, + }, + ]); + + let report = evaluate(&corpus, &verdicts); + assert!( + report.overall.score >= 0.85, + "scenario requires overall F1 ≥ 0.85 (was {:.3})", + report.overall.score + ); + let violations = per_kind_violations(&report); + assert!( + violations.iter().any(|v| v.contains("RestatesCode")), + "floor must flag the RestatesCode regression; got {violations:?}" + ); +} + +fn synthetic_case(kind: &str, label: Label) -> Case { + Case { + text: "synthetic".into(), + code: "x = 1".into(), + position: PositionRole::Leading, + scope: Scope::Module, + language: "python".into(), + comment_type: CommentKind::Line, + kind: kind.into(), + label, } } diff --git a/eval/corpus.json b/eval/corpus.json index 51f2d87..43fcd48 100644 --- a/eval/corpus.json +++ b/eval/corpus.json @@ -1,52 +1,52 @@ [ - {"text": "#!/usr/bin/env python", "language": "python", "comment_type": "line", "kind": "Shebang"}, - {"text": "#!/bin/bash", "language": "bash", "comment_type": "line", "kind": "Shebang"}, - {"text": "# noqa: E501", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "// @ts-ignore", "language": "typescript", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "# pyright: ignore", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "// eslint-disable-next-line", "language": "javascript", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "# type: ignore", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "# shellcheck disable=SC2086", "language": "bash", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "// nolint:golint", "language": "go", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "// clippy::too_many_arguments", "language": "rust", "comment_type": "line", "kind": "LinterDirective"}, - {"text": "/* istanbul ignore next */", "language": "javascript", "comment_type": "block", "kind": "LinterDirective"}, - {"text": "// SPDX-License-Identifier: MIT", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, - {"text": "// Copyright (c) 2024 Example Corp. All rights reserved.", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, - {"text": "# given", "language": "python", "comment_type": "line", "kind": "BddStep"}, - {"text": "// when & then", "language": "go", "comment_type": "line", "kind": "BddStep"}, - {"text": "// workaround: the SDK panics on empty input", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "// Why: the offset is 1-based, not 0-based", "language": "go", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "# because SQLite locks the whole file, batch the writes", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "// to avoid the TOCTOU race, open before checking", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "# !NOTE: keep 8MB below 32-bit overflow", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "// @author Jane Doe", "language": "rust", "comment_type": "line", "kind": "Attribution"}, - {"text": "// ref: https://github.com/systemfsoftware/claude-code-comment-checker", "language": "go", "comment_type": "line", "kind": "Attribution"}, - {"text": "\"\"\"Fetches a user.\n Args:\n id: the user id.\n \"\"\"", "language": "python", "comment_type": "docstring", "kind": "PublicApiDoc"}, - {"text": "/**\n * @param {string} name\n * @returns {number}\n */", "language": "javascript", "comment_type": "docstring", "kind": "PublicApiDoc"}, - {"text": "/** Returns the sum.\n * @param a first addend\n * @return a+b\n */", "language": "java", "comment_type": "docstring", "kind": "PublicApiDoc"}, - {"text": "// THIS FILE IS AUTO-GENERATED - DO NOT EDIT", "language": "go", "comment_type": "line", "kind": "GeneratedFile"}, - {"text": "// adds one to one", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "// this will be true", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "# Send a notification", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "## Returns the square of x", "language": "ruby", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "# section: argument parsing helpers", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "\"\"\"This is a module docstring.\"\"\"", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, - {"text": "\"\"\"Fetch the user.\"\"\"", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, - {"text": "// fmt.Println(\"debug\")", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, - {"text": "# print(x) # debug", "language": "python", "comment_type": "line", "kind": "CommentedOutCode"}, - {"text": "// x = x + 1", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, - {"text": "// TODO: FIX THIS", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, - {"text": "// TODO: fix this later", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, - {"text": "# TODO: handle the empty-list edge case", "language": "python", "comment_type": "line", "kind": "VacuousTodo"}, - {"text": "// FIXME: crashes on Windows paths", "language": "rust", "comment_type": "line", "kind": "VacuousTodo"}, - {"text": "// Changed from old_value to new_value", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "# Modified to use new implementation", "language": "python", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// Updated from v1 to v2", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// Refactored for better performance", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// Added new validation logic", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// Removed deprecated function", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// Implemented new feature", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, - {"text": "// This is a comment", "language": "javascript", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "// This is a Go comment", "language": "go", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "/* This is a block comment */", "language": "typescript", "comment_type": "block", "kind": "RestatesCode"} -] + {"text": "#!/usr/bin/env python", "code": "import sys", "position": "docstring-head", "scope": "module", "language": "python", "comment_type": "line", "kind": "Shebang"}, + {"text": "#!/bin/bash", "code": "set -e", "position": "docstring-head", "scope": "module", "language": "bash", "comment_type": "line", "kind": "Shebang"}, + {"text": "# noqa: E501", "code": "import os", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// @ts-ignore", "code": "const x = 1;", "position": "leading", "scope": "module", "language": "typescript", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# pyright: ignore", "code": "x: int = 1", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// eslint-disable-next-line", "code": "const a = 1;", "position": "leading", "scope": "module", "language": "javascript", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# type: ignore", "code": "from app import client", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "# shellcheck disable=SC2086", "code": "echo \"$flag\"", "position": "leading", "scope": "module", "language": "bash", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// nolint:golint", "code": "package main", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "// clippy::too_many_arguments", "code": "pub fn configure() {}", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "LinterDirective"}, + {"text": "/* istanbul ignore next */", "code": "module.exports = api;", "position": "leading", "scope": "module", "language": "javascript", "comment_type": "block", "kind": "LinterDirective"}, + {"text": "// SPDX-License-Identifier: MIT", "code": "package main", "position": "docstring-head", "scope": "module", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, + {"text": "// Copyright (c) 2024 Example Corp. All rights reserved.", "code": "package main", "position": "docstring-head", "scope": "module", "language": "go", "comment_type": "line", "kind": "LicenseHeader"}, + {"text": "# given", "code": "import pytest", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "BddStep"}, + {"text": "// when & then", "code": "package main", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "BddStep"}, + {"text": "// workaround: the SDK panics on empty input", "code": "pub fn decode(raw: &str) -> Result<()> { Ok(()) }", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// Why: the offset is 1-based, not 0-based", "code": "package main", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "# because SQLite locks the whole file, batch the writes", "code": "for chunk in chunks:", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// to avoid the TOCTOU race, open before checking", "code": "pub fn open(path: &str) -> Result { Ok(File::open(path)?) }", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "# !NOTE: keep 8MB below 32-bit overflow", "code": "size = 8 * 1024 * 1024", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "// @author Jane Doe", "code": "pub fn main() {}", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "Attribution"}, + {"text": "// ref: https://github.com/systemfsoftware/comment-checker", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "Attribution"}, + {"text": "\"\"\"Fetches a user.\n Args:\n id: the user id.\n \"\"\"", "code": "return fetch_user(user_id)", "position": "docstring-head", "scope": "function", "language": "python", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "/**\n * @param {string} name\n * @returns {number}\n */", "code": "function add(a, b) { return a + b; }", "position": "leading", "scope": "function", "language": "javascript", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "/** Returns the sum.\n * @param a first addend\n * @return a+b\n */", "code": "int add(int a, int b) { return a + b; }", "position": "docstring-head", "scope": "function", "language": "java", "comment_type": "docstring", "kind": "PublicApiDoc"}, + {"text": "// THIS FILE IS AUTO-GENERATED - DO NOT EDIT", "code": "package main", "position": "docstring-head", "scope": "module", "language": "go", "comment_type": "line", "kind": "GeneratedFile"}, + {"text": "// adds one to one", "code": "let x = x + 1;", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// this will be true", "code": "let enabled = true;", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# Send a notification", "code": "send_notification(recipient, subject)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "## Returns the square of x", "code": "def square(x) = x * x", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# section: argument parsing helpers", "code": "def parse_args():", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "\"\"\"This is a module docstring.\"\"\"", "code": "import os", "position": "docstring-head", "scope": "module", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, + {"text": "\"\"\"Fetch the user.\"\"\"", "code": "def fetch_user(user_id)", "position": "docstring-head", "scope": "function", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, + {"text": "// fmt.Println(\"debug\")", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "# print(x) # debug", "code": "total = 0", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "// x = x + 1", "code": "var x int", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, + {"text": "// TODO: FIX THIS", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// TODO: fix this later", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "# TODO: handle the empty-list edge case", "code": "def process(items):", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// FIXME: crashes on Windows paths", "code": "pub fn read() {}", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "VacuousTodo"}, + {"text": "// Changed from old_value to new_value", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "# Modified to use new implementation", "code": "def render():", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Updated from v1 to v2", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Refactored for better performance", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Added new validation logic", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Removed deprecated function", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// Implemented new feature", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, + {"text": "// This is a comment", "code": "const total = 42;", "position": "leading", "scope": "module", "language": "javascript", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// This is a Go comment", "code": "package main", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "/* This is a block comment */", "code": "const x = 1;", "position": "leading", "scope": "module", "language": "typescript", "comment_type": "block", "kind": "RestatesCode"} +] \ No newline at end of file From 63ad624ed02bc9053c0a854936c23199035a9d6c Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 15:51:36 +0000 Subject: [PATCH 03/11] test(context): pin nested-block scope and Edit fragment reliability (U2) - A comment inside a loop body reports Scope::NestedBlock with the loop statement as its adjacent code. - A real Edit payload that introduces a would-be restatement passes: the fragment-edge context is marked unreliable, the classifier falls back to the text-only floor, and the hook never convicts on context the fragment cannot vouch for. --- crates/comment-checker/tests/context.rs | 14 ++++++++++++++ crates/comment-checker/tests/pipeline.rs | 13 +++++++++++++ 2 files changed, 27 insertions(+) diff --git a/crates/comment-checker/tests/context.rs b/crates/comment-checker/tests/context.rs index 8b8717b..a0494ab 100644 --- a/crates/comment-checker/tests/context.rs +++ b/crates/comment-checker/tests/context.rs @@ -100,6 +100,20 @@ fn trailing_comment_annotates_the_statement_beside_it() { assert!(!ctx.annotates_declaration); } +#[test] +fn comment_inside_a_loop_reports_nested_block_scope() { + // U2 scenario: a comment inside a loop body is unambiguously nested, and + // its adjacent code is the loop statement it annotates. + let comment = only( + "for x in xs:\n # filter the results\n filtered.append(x)\n", + "a.py", + ); + let ctx = comment.context.expect("context"); + assert_eq!(ctx.scope, Scope::NestedBlock); + assert_eq!(ctx.position, PositionRole::Leading); + assert_eq!(ctx.adjacent_code.as_deref(), Some("filtered.append(x)")); +} + #[test] fn comment_above_a_plain_statement_does_not_annotate_a_declaration() { // `PositionRole` is positional: a comment first in the file occupies the diff --git a/crates/comment-checker/tests/pipeline.rs b/crates/comment-checker/tests/pipeline.rs index 0b4d176..0d5a38c 100644 --- a/crates/comment-checker/tests/pipeline.rs +++ b/crates/comment-checker/tests/pipeline.rs @@ -60,6 +60,19 @@ fn edit_new_comment_blocks() { assert!(matches!(check(input, ""), Outcome::Block { .. })); } +#[test] +fn edit_fragment_context_is_never_relied_upon() { + // U2 scenario: an Edit sees only the fragment, so a comment that would + // restate its adjacent code must NOT be convicted — the text-only floor + // downgrades, the hook passes, and the user is not blocked on context the + // fragment cannot vouch for. + let input = r#"{"tool_name":"Edit","tool_input":{"file_path":"foo.py","old_string":"counter = 0\n","new_string":"counter = 0\n# increment the counter\ncounter += 1\n"}}"#; + assert!( + matches!(check(input, ""), Outcome::Pass { .. }), + "an Edit fragment whose context is unreliable must fall back, not convict" + ); +} + #[test] fn report_names_the_reason() { let input = write("foo.go", "// TODO: refactor later\n"); From f222cca5bc4bb62e0e69776c220214dbbbffc9e4 Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 15:55:50 +0000 Subject: [PATCH 04/11] feat(classify): evidence-backed restatement detection with operator table (U3) RestatesCode is no longer a hand-waved catch-all: on reliable structural context the verdict carries the cited overlap (U3, KTD3). - comment.rs: UnnecessaryKind::RestatesCode now carries RestateEvidence (lexical tokens in comment order + (verb, operator) table matches); the empty-evidence form is the retained terminal text-only rule. - classify.rs: restate_evidence runs only on reliable context and fires on >= 50% lexical containment OR a verb->operator table match (increment <-> +=, decrement <-> -=, returns <-> return, assign, add/subtract/multiply/divide, double/halve). Word-like operators match as whole tokens so 'add' cannot fire on 'address'. The operator table requires the operator to actually appear in the adjacent code. INTENT markers gain 1-based/0-based (constraint conventions). - Attribution markers gain ref:/source: so provenance links classify as attribution, not generic intent (previously hidden by a 2-case kind with no display floor). - Corpus: +5 context-bearing cases pinning the new behaviour, including an inline paraphrase and the precision moat (throttle comment spared). - Report: the block reason cites the shared tokens and operator matches. --- crates/comment-checker/src/classify.rs | 161 ++++++++++++++++-- crates/comment-checker/src/comment.rs | 29 +++- crates/comment-checker/src/lib.rs | 4 +- crates/comment-checker/src/report.rs | 27 ++- crates/comment-checker/tests/classify.rs | 183 ++++++++++++++++++++- crates/comment-checker/tests/common/mod.rs | 2 +- crates/comment-checker/tests/f1.rs | 8 +- crates/comment-checker/tests/pipeline.rs | 14 ++ eval/corpus.json | 7 +- 9 files changed, 395 insertions(+), 40 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index e9ae342..b9fbdf6 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -3,7 +3,9 @@ //! No I/O, no clock, no randomness, no branches — the decision is a fold over //! ordered rule tables (CONST-P1, CONST-P2). -use crate::comment::{Comment, CommentType, Justification, PositionRole, UnnecessaryKind, Verdict}; +use crate::comment::{ + Comment, CommentType, Justification, PositionRole, RestateEvidence, UnnecessaryKind, Verdict, +}; /// A classification rule: the reason it assigns and the predicate that /// recognises it. Predicates receive the comment's trimmed, lowercased text as @@ -83,11 +85,17 @@ pub fn classify(comment: &Comment) -> Verdict { .iter() .find(|rule| (rule.matches)(text.as_str(), comment)) .map(|rule| Verdict::Unnecessary { - reason: rule.reason, + reason: rule.reason.clone(), }) }) - .unwrap_or(Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode, + .unwrap_or_else(|| { + // The context-aware restatement path is primary; the terminal + // rule (empty evidence) is retained for zero-overlap filler. + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: restate_evidence(comment), + }, + } }); // Conservative downgrade: when a comment's structural context is unreliable // (Edit/MultiEdit fragment edge) the catch-all RestatesCode path is too @@ -104,7 +112,7 @@ const fn is_unreliable_fallback(verdict: &Verdict) -> bool { matches!( verdict, Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode + reason: UnnecessaryKind::RestatesCode { .. } } ) } @@ -112,26 +120,136 @@ const fn is_unreliable_fallback(verdict: &Verdict) -> bool { /// True when the comment's content-bearing vocabulary is mostly contained in /// the adjacent code's: at least half of the comment's content tokens also /// appear among the adjacent code's content tokens. +/// +/// Lexical containment only — the operator table is an evidence *addition* +/// ([`restate_evidence`]), not part of the doc-contract revocation check. #[must_use] pub fn restates_adjacent(comment: &Comment) -> bool { + lexical_containment(comment).is_some_and(|c| c >= RESTATE_CONTAINMENT) +} + +/// The overlap threshold: half of the comment's unique content tokens must +/// also appear in the adjacent code before the restatement claim is made. +const RESTATE_CONTAINMENT: f64 = 0.5; + +/// The deterministic synonym/operator table (KTD3): a comment verb whose +/// action the adjacent code expresses with an operator or keyword. +const OPERATOR_TABLE: &[(&str, &[&str])] = &[ + ("increment", &["+=", "++"]), + ("increments", &["+=", "++"]), + ("incrementing", &["+=", "++"]), + ("decrement", &["-=", "--"]), + ("decrements", &["-=", "--"]), + ("decrementing", &["-=", "--"]), + ("assign", &["=", ":="]), + ("assigns", &["=", ":="]), + ("assigned", &["=", ":="]), + ("return", &["return"]), + ("returns", &["return"]), + ("returning", &["return"]), + ("add", &["+"]), + ("adds", &["+"]), + ("adding", &["+"]), + ("subtract", &["-"]), + ("subtracts", &["-"]), + ("subtracting", &["-"]), + ("multiply", &["*"]), + ("multiplies", &["*"]), + ("multiplying", &["*"]), + ("divide", &["/"]), + ("divides", &["/"]), + ("dividing", &["/"]), + ("double", &["* 2", " *2"]), + ("doubles", &["* 2", " *2"]), + ("halve", &["/ 2", " /2"]), + ("halves", &["/ 2", " /2"]), +]; + +/// True when `adjacent` (lowercased) contains the operator `op`. +/// +/// Word-like operators (`return`) match as whole tokens so `add` in +/// `address` cannot fire; symbolic operators (`+=`, `+`, `*`) match as +/// substrings, which a parse would confirm in every realistic spelling. +fn code_contains_operator( + adjacent: &str, + adjacent_tokens: &std::collections::HashSet, + op: &str, +) -> bool { + if op.chars().all(|c| c.is_alphanumeric() || c == '_') { + adjacent_tokens.contains(op) + } else { + adjacent.contains(op) + } +} + +/// The evidence that `comment` restates its adjacent code (U3, KTD3): the +/// overlapping tokens cited, and any verb→operator table matches. +/// +/// Never called on unreliable context (Edit fragments); the caller falls back +/// to the terminal text-only rule via empty evidence. +#[must_use] +pub fn restate_evidence(comment: &Comment) -> RestateEvidence { let Some(adjacent) = comment .context .as_ref() + .filter(|c| !c.unreliable) .and_then(|c| c.adjacent_code.as_ref()) else { - return false; + return RestateEvidence::default(); }; - let comment_tokens = content_tokens(&comment.text); + let comment_tokens = ordered_content_tokens(&comment.text); + if comment_tokens.is_empty() { + return RestateEvidence::default(); + } + let adjacent_tokens = content_tokens(adjacent); + let adjacent_lower = adjacent.to_ascii_lowercase(); + + let mut lexical = Vec::new(); + let mut operator = Vec::new(); + for token in &comment_tokens { + if adjacent_tokens.contains(token) { + lexical.push(token.clone()); + } + if let Some((_, ops)) = OPERATOR_TABLE.iter().find(|(verb, _)| verb == token) { + if let Some(op) = ops + .iter() + .find(|op| code_contains_operator(&adjacent_lower, &adjacent_tokens, op)) + { + operator.push((token.clone(), (*op).to_owned())); + } + } + } + + let containment = f64::from(u32::try_from(lexical.len()).unwrap_or(0)) + / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)); + let evidence = RestateEvidence { lexical, operator }; + if containment >= RESTATE_CONTAINMENT || !evidence.operator.is_empty() { + evidence + } else { + RestateEvidence::default() + } +} + +/// The lexical containment of the comment's vocabulary in its adjacent code, +/// or `None` when the context is absent or carries no adjacent code. +fn lexical_containment(comment: &Comment) -> Option { + let adjacent = comment + .context + .as_ref() + .and_then(|c| c.adjacent_code.as_ref())?; + let comment_tokens = ordered_content_tokens(&comment.text); + if comment_tokens.is_empty() { + return None; + } let adjacent_tokens = content_tokens(adjacent); let intersection = comment_tokens .iter() .filter(|t| adjacent_tokens.contains(*t)) .count(); - // `comment_tokens` is guaranteed non-empty by `content_tokens` dropping - // stop-words/markers only when caller text has none; empty → 0 < 0.5. - let containment = f64::from(u32::try_from(intersection).unwrap_or(0)) - / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)); - containment >= 0.5 + Some( + f64::from(u32::try_from(intersection).unwrap_or(0)) + / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)), + ) } /// English stop-words stripped from content tokens. Compiled separately to @@ -141,19 +259,26 @@ const STOP_WORDS: &[&str] = &[ "that", "these", "those", "as", "by", "be", "are", "was", "but", "not", "no", ]; -/// The set of content-bearing tokens in `text`. Splits on whitespace and -/// punctuation, lower-cases, strips comment markers and English stop-words. -/// Returns owned strings so callers can decide lifetime. -#[must_use] -pub fn content_tokens(text: &str) -> std::collections::HashSet { +/// The content-bearing tokens of `text` in order of first appearance. +fn ordered_content_tokens(text: &str) -> Vec { let stripped = strip_comment_marker(text).trim().to_ascii_lowercase(); + let mut seen = std::collections::HashSet::new(); stripped .split(|c: char| !c.is_alphanumeric() && c != '_') .filter(|s| !s.is_empty() && !STOP_WORDS.contains(s)) + .filter(|s| seen.insert((*s).to_owned())) .map(str::to_owned) .collect() } +/// The set of content-bearing tokens in `text`. Splits on whitespace and +/// punctuation, lower-cases, strips comment markers and English stop-words. +/// Returns owned strings so callers can decide lifetime. +#[must_use] +pub fn content_tokens(text: &str) -> std::collections::HashSet { + ordered_content_tokens(text).into_iter().collect() +} + const COMMENT_MARKERS: &[&str] = &["//", "/*", "#", "--", "*"]; /// Strip one leading comment marker and trim leading whitespace. @@ -408,6 +533,8 @@ const INTENT_MARKERS: &[&str] = &[ "security", "thread-safety", "thread safety", + "1-based", + "0-based", "@link", ]; diff --git a/crates/comment-checker/src/comment.rs b/crates/comment-checker/src/comment.rs index 91f4c0d..92c4182 100644 --- a/crates/comment-checker/src/comment.rs +++ b/crates/comment-checker/src/comment.rs @@ -118,7 +118,7 @@ pub enum Justification { } /// Why a comment should be removed. -#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)] +#[derive(Clone, Debug, Eq, PartialEq, Hash)] pub enum UnnecessaryKind { /// A memo-style note describing what changed, not why. AgentMemo, @@ -126,8 +126,31 @@ pub enum UnnecessaryKind { CommentedOutCode, /// A `TODO`/`FIXME` with no tracked reference. VacuousTodo, - /// A comment that merely restates what the code already says. - RestatesCode, + /// A comment that merely restates what the code already says, with the + /// cited overlap that proves the restatement (U3). + RestatesCode { evidence: RestateEvidence }, +} + +/// The evidence that a comment restates its adjacent code (KTD3). +/// +/// The verdict is only as trustworthy as the citation: an empty `lexical` and +/// `operator` list marks the terminal text-only path (zero-overlap filler), +/// never a context-aware claim. +#[derive(Clone, Debug, Default, Eq, PartialEq, Hash)] +pub struct RestateEvidence { + /// Comment tokens that also appear in the adjacent code, in comment order. + pub lexical: Vec, + /// `(comment verb, code operator)` pairs from the deterministic synonym + /// table — `increment` ↔ `+=`, `returns` ↔ `return`, … + pub operator: Vec<(String, String)>, +} + +impl RestateEvidence { + /// True when neither path produced a citation. + #[must_use] + pub fn is_empty(&self) -> bool { + self.lexical.is_empty() && self.operator.is_empty() + } } /// The classification decision for a single comment. diff --git a/crates/comment-checker/src/lib.rs b/crates/comment-checker/src/lib.rs index 4902f6f..88984a4 100644 --- a/crates/comment-checker/src/lib.rs +++ b/crates/comment-checker/src/lib.rs @@ -19,6 +19,6 @@ pub mod report; pub use check::{Outcome, check}; pub use classify::classify; pub use comment::{ - Comment, CommentContext, CommentType, Justification, PositionRole, Scope, UnnecessaryKind, - Verdict, + Comment, CommentContext, CommentType, Justification, PositionRole, RestateEvidence, Scope, + UnnecessaryKind, Verdict, }; diff --git a/crates/comment-checker/src/report.rs b/crates/comment-checker/src/report.rs index d9ae5c3..1855f07 100644 --- a/crates/comment-checker/src/report.rs +++ b/crates/comment-checker/src/report.rs @@ -3,7 +3,7 @@ use crate::comment::{Comment, UnnecessaryKind}; /// A comment the classifier marked unnecessary, kept for the report. -#[derive(Clone, Copy, Debug)] +#[derive(Clone, Debug)] pub struct Flagged<'a> { pub comment: &'a Comment, pub kind: UnnecessaryKind, @@ -27,7 +27,7 @@ pub fn format_report(flagged: &[Flagged<'_>], file_path: &str, custom_prompt: &s " line {} — {} — {}", flag.comment.line_number, flag.comment.text.trim(), - reason_text(flag.kind), + reason_text(&flag.kind), )); } lines.push(String::new()); @@ -44,15 +44,28 @@ pub fn format_report(flagged: &[Flagged<'_>], file_path: &str, custom_prompt: &s } } -fn reason_text(kind: UnnecessaryKind) -> &'static str { +fn reason_text(kind: &UnnecessaryKind) -> String { match kind { - UnnecessaryKind::RestatesCode => "restates what the code already says", + UnnecessaryKind::RestatesCode { evidence } => { + let mut reason = "restates what the code already says".to_owned(); + if !evidence.is_empty() { + let mut parts = Vec::new(); + if !evidence.lexical.is_empty() { + parts.push(format!("shares {}", evidence.lexical.join(", "))); + } + for (verb, op) in &evidence.operator { + parts.push(format!("{verb} ↔ {op}")); + } + reason = format!("{reason} ({})", parts.join("; ")); + } + reason + } UnnecessaryKind::AgentMemo => { - "describes what changed, not why — git history already records this" + "describes what changed, not why — git history already records this".to_owned() } - UnnecessaryKind::CommentedOutCode => "dead code left in a comment", + UnnecessaryKind::CommentedOutCode => "dead code left in a comment".to_owned(), UnnecessaryKind::VacuousTodo => { - "a TODO with no tracked reference — file a ticket or delete it" + "a TODO with no tracked reference — file a ticket or delete it".to_owned() } } } diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index 19b5e27..4b369ba 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -7,7 +7,10 @@ //! category, in both directions, so a rule change or removal fails a test. use claude_code_comment_checker::classify::classify; -use claude_code_comment_checker::{Comment, CommentType, Justification, UnnecessaryKind, Verdict}; +use claude_code_comment_checker::{ + Comment, CommentContext, CommentType, Justification, PositionRole, RestateEvidence, Scope, + UnnecessaryKind, Verdict, +}; use proptest::prelude::*; use proptest::strategy::Strategy; @@ -90,7 +93,9 @@ fn plain_comment_is_unnecessary() { assert_eq!( classify(&line("// adds one to one")), Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default() + } } ); } @@ -114,7 +119,9 @@ fn docstring_without_markup_is_unnecessary() { assert_eq!( classify(&docstring("\"\"\"Fetch the user.\"\"\"")), Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default() + } } ); } @@ -259,7 +266,7 @@ fn docstring_head_without_markup_is_not_a_public_contract() { // line above a declaration a restatement, not documentation. use claude_code_comment_checker::classify::classify; use claude_code_comment_checker::{ - CommentContext, CommentType, PositionRole, Scope, UnnecessaryKind, Verdict, + CommentContext, CommentType, PositionRole, RestateEvidence, Scope, UnnecessaryKind, Verdict, }; let mut comment = Comment::new("Adds two numbers", 1, CommentType::Docstring); comment.context = Some(CommentContext { @@ -272,7 +279,9 @@ fn docstring_head_without_markup_is_not_a_public_contract() { assert_eq!( classify(&comment), Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode, + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default() + }, } ); } @@ -633,7 +642,7 @@ fn unreliable_context_downgrades_fallback_restate_to_justified() { fn reliable_context_keeps_fallback_restate_as_unnecessary() { use claude_code_comment_checker::classify::classify; use claude_code_comment_checker::{ - CommentContext, CommentType, PositionRole, Scope, UnnecessaryKind, Verdict, + CommentContext, CommentType, PositionRole, RestateEvidence, Scope, UnnecessaryKind, Verdict, }; let mut comment = Comment::new("Adds two numbers", 1, CommentType::Line); comment.context = Some(CommentContext { @@ -646,7 +655,167 @@ fn reliable_context_keeps_fallback_restate_as_unnecessary() { assert_eq!( classify(&comment), Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode, + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default() + }, + } + ); +} + +// U3 — the context-aware restatement detector, with cited evidence. + +fn context_comment(text: &str, adjacent: &str) -> Comment { + let mut comment = Comment::new(text, 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some(adjacent.to_owned()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + comment +} + +#[test] +fn restate_cites_lexical_overlap() { + // `// counter` beside `counter += 1` is a literal restatement; the verdict + // carries the cited token so the block report can show it. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// counter", "counter += 1"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert_eq!(evidence.lexical, vec!["counter".to_owned()]); + assert!(evidence.operator.is_empty()); +} + +#[test] +fn restate_cites_operator_paraphrase() { + // `// increment the counter` beside `counter += 1` is a paraphrased + // restatement: lexical overlap on `counter` plus the verb→operator table + // match `increment` ↔ `+=`. + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// increment the counter", "counter += 1"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert_eq!(evidence.lexical, vec!["counter".to_owned()]); + assert_eq!( + evidence.operator, + vec![("increment".to_owned(), "+=".to_owned())] + ); +} + +#[test] +fn restate_matches_operator_even_without_lexical_overlap() { + // `decrements` shares no token with `i -= 1`, but the operator table + // still catches the paraphrase. + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// decrements the counter", "i -= 1"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert!(evidence.lexical.is_empty()); + assert_eq!( + evidence.operator, + vec![("decrements".to_owned(), "-=".to_owned())] + ); +} + +#[test] +fn restate_never_convicts_higher_abstraction_comment() { + // The precision moat: a comment that adds a constraint/why the code lacks + // is spared even next to restating words. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{Justification, Verdict}; + let comment = context_comment("// throttle to avoid the rate limit", "sleep(delay)"); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::NonObviousIntent, + } + ); + // …and a justified comment that merely shares a word with the code is not + // convicted on the overlap alone. + let comment = context_comment( + "// counter reads 1-based; code below is 0-based", + "let counter = 0;", + ); + assert!(matches!(classify(&comment), Verdict::Justified { .. })); +} + +#[test] +fn restate_operator_table_requires_the_operator_in_code() { + // `add` must not fire just because a verb is in the table — the matched + // operator has to actually appear in the adjacent code. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// add retries", "address = resolve()"); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: claude_code_comment_checker::RestateEvidence::default(), + }, + } + ); +} + +#[test] +fn restates_signature_with_lexical_evidence() { + // `// returns the user` beside `pub fn user()` is the classic signature + // echo: flagged, citing `user` (lexical overlap). The operator table does + // NOT fire — `return` never appears in this signature, and a verb in the + // table is not enough without its operator in the code. + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// returns the user", "pub fn user() -> User"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert_eq!(evidence.lexical, vec!["user".to_owned()]); + assert!(evidence.operator.is_empty()); +} + +#[test] +fn restate_detector_does_not_run_on_unreliable_context() { + // Fragment-bounded context (Edit/MultiEdit) must never drive a conviction: + // restate evidence stays empty there and the conservative downgrade wins. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("// increment the counter", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("counter += 1".into()), + annotates_declaration: false, + scope: Scope::Module, + position: PositionRole::Inline, + unreliable: true, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::NonObviousIntent, } ); } diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs index 1df0938..b30b852 100644 --- a/crates/comment-checker/tests/common/mod.rs +++ b/crates/comment-checker/tests/common/mod.rs @@ -208,7 +208,7 @@ pub fn verdict_kind(verdict: &Verdict) -> &'static str { UnnecessaryKind::AgentMemo => "AgentMemo", UnnecessaryKind::CommentedOutCode => "CommentedOutCode", UnnecessaryKind::VacuousTodo => "VacuousTodo", - UnnecessaryKind::RestatesCode => "RestatesCode", + UnnecessaryKind::RestatesCode { .. } => "RestatesCode", }, } } diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs index dc558e6..bf6a1b7 100644 --- a/crates/comment-checker/tests/f1.rs +++ b/crates/comment-checker/tests/f1.rs @@ -5,7 +5,9 @@ mod common; -use claude_code_comment_checker::{Justification, PositionRole, Scope, UnnecessaryKind, Verdict}; +use claude_code_comment_checker::{ + Justification, PositionRole, RestateEvidence, Scope, UnnecessaryKind, Verdict, +}; use common::{ Case, CommentKind, Label, evaluate, load_corpus, parse_corpus, per_kind_violations, predict, predict_detected, @@ -169,7 +171,9 @@ fn per_kind_floor_catches_kind_level_regression() { // recall collapses while the overall F1 stays high on the AgentMemo pool. verdicts.extend([ Verdict::Unnecessary { - reason: UnnecessaryKind::RestatesCode, + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default(), + }, }, Verdict::Justified { reason: Justification::NonObviousIntent, diff --git a/crates/comment-checker/tests/pipeline.rs b/crates/comment-checker/tests/pipeline.rs index 0d5a38c..d7ea9a8 100644 --- a/crates/comment-checker/tests/pipeline.rs +++ b/crates/comment-checker/tests/pipeline.rs @@ -84,3 +84,17 @@ fn report_names_the_reason() { "report was: {report}" ); } + +#[test] +fn report_cites_restate_evidence() { + // The block reason must show the overlap the verdict was built on, so the + // flag is checkable rather than hand-waved. + let input = write("foo.rs", "// increment the counter\ncounter += 1;\n"); + let Outcome::Block { report } = check(&input, "") else { + panic!("expected a block"); + }; + assert!( + report.contains("shares counter") && report.contains("increment ↔ +="), + "report was: {report}" + ); +} diff --git a/eval/corpus.json b/eval/corpus.json index 43fcd48..7db8be5 100644 --- a/eval/corpus.json +++ b/eval/corpus.json @@ -48,5 +48,10 @@ {"text": "// Implemented new feature", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "AgentMemo"}, {"text": "// This is a comment", "code": "const total = 42;", "position": "leading", "scope": "module", "language": "javascript", "comment_type": "line", "kind": "RestatesCode"}, {"text": "// This is a Go comment", "code": "package main", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "/* This is a block comment */", "code": "const x = 1;", "position": "leading", "scope": "module", "language": "typescript", "comment_type": "block", "kind": "RestatesCode"} + {"text": "/* This is a block comment */", "code": "const x = 1;", "position": "leading", "scope": "module", "language": "typescript", "comment_type": "block", "kind": "RestatesCode"}, + {"text": "// counter", "code": "counter += 1;", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// increment the counter", "code": "counter += 1;", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "// returns the user", "code": "pub fn user(id: u64) -> User", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# increments the counter", "code": "counter += 1", "position": "inline", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, + {"text": "# throttle to avoid the rate limit", "code": "sleep(delay)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"} ] \ No newline at end of file From c88c864a865f31583f1c0505c4c582c0517816a9 Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 16:00:45 +0000 Subject: [PATCH 05/11] test(classify): pin restate evidence branches that mutants survived (U3) Two new branches in the restate detector needed dedicated pins after the first mutation run left them unprotected: - word-like operators match as whole tokens, not substrings (return_value cannot satisfy the 'return' operator); - evidence requires >= 50% containment, not any nonzero overlap. cargo mutants now reports 0 missed on classify.rs. --- crates/comment-checker/tests/classify.rs | 36 ++++++++++++++++++++++++ 1 file changed, 36 insertions(+) diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index 4b369ba..6528006 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -819,3 +819,39 @@ fn restate_detector_does_not_run_on_unreliable_context() { } ); } + +#[test] +fn restate_word_operators_match_as_tokens_not_substrings() { + // `return_value` contains the letters of `return` but is not the keyword: + // the operator path must not fire on the substring. This pins the + // alphanumeric-vs-symbolic split in `code_contains_operator`. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// returns the value", "let return_value = 1;"); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: claude_code_comment_checker::RestateEvidence::default(), + }, + } + ); +} + +#[test] +fn restate_evidence_needs_containment_not_any_overlap() { + // One shared token out of three is not a restatement claim: the evidence + // stays empty (the mutant that turns `/` into `*` would fire on any + // nonzero overlap and must die). + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// alpha beta gamma", "let alpha = 1;"); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: claude_code_comment_checker::RestateEvidence::default(), + }, + } + ); +} From 2de3725353c82c83514a8a279a0aa30ef12aace1 Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 16:01:44 +0000 Subject: [PATCH 06/11] feat(classify): recognize API-doc markup in any comment type (U4) is_public_api_doc no longer requires the Docstring type: a line or block comment whose contract markup leads the comment (after its marker) at a contract position is interface documentation. Mid-sentence markup stays unjustified, trailing/inline tags document nothing, and the text-only / unreliable paths keep today's conservative docstring-only promotion. The U3 docstring echo guard is unchanged for docstrings; a contract tag on a line comment (the tag IS the contract) is not revoked for echoing the declaration. Corpus gains a Ruby '# Returns: the user' case. --- crates/comment-checker/src/classify.rs | 81 ++++++++++++++++++++---- crates/comment-checker/tests/classify.rs | 65 +++++++++++++++++-- eval/corpus.json | 3 +- 3 files changed, 130 insertions(+), 19 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index b9fbdf6..b613b1d 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -333,24 +333,31 @@ fn is_bdd(text: &str, _comment: &Comment) -> bool { } /// A docstring documents a public contract when it carries contract markup -/// (`@param`, `Args:`, `Returns:`, …). +/// (`@param`, `Args:`, `Returns:`, …); a line or block comment does the same +/// when contract markup *leads* the comment at a contract position (U4). /// /// Structural context can only *narrow* that judgement, never widen it — the /// corpus treats a bare summary line (`"""Fetch the user."""`) as a /// restatement, so position alone must not justify a comment. When context is -/// available the markup must additionally be positioned as a contract (U4): -/// attached to a declaration, not trailing a statement; and it must not merely -/// echo the declaration it documents (U3). +/// available the markup must additionally be positioned as a contract: +/// attached to a declaration, not trailing a statement; and a docstring must +/// not merely echo the declaration it documents (U3). A line/block comment +/// whose lone job is the contract tag (`# Returns: …`) is not revoked for +/// echoing — the tag is the contract. fn is_public_api_doc(text: &str, comment: &Comment) -> bool { - if comment.comment_type != CommentType::Docstring { - return false; - } - if !any_contains(text, DOC_MARKUP) { + let markup = match comment.comment_type { + CommentType::Docstring => any_contains(text, DOC_MARKUP), + // Non-docstrings need the markup at the start, so prose that happens + // to mention `@param` mid-sentence is never promoted to a contract. + CommentType::Line | CommentType::Block => leads_with_contract_markup(text), + }; + if !markup { return false; } - let Some(ctx) = comment.context.as_ref() else { - // Text-only path: markup is the whole signal. - return true; + // Text-only / unreliable path: only docstrings are promoted by markup + // alone; a line comment without trustworthy position documents nothing. + let Some(ctx) = comment.context.as_ref().filter(|c| !c.unreliable) else { + return comment.comment_type == CommentType::Docstring; }; let positioned_as_contract = match ctx.position { // Python-style: the docstring lives at the head of the body it documents. @@ -360,7 +367,57 @@ fn is_public_api_doc(text: &str, comment: &Comment) -> bool { // A doc-shaped comment after or beside code documents nothing. PositionRole::Trailing | PositionRole::Inline => false, }; - positioned_as_contract && !restates_adjacent(comment) + if !positioned_as_contract { + return false; + } + match comment.comment_type { + CommentType::Docstring => !restates_adjacent(comment), + CommentType::Line | CommentType::Block => true, + } +} + +/// Contract markup that must *lead* a non-docstring comment (after its marker +/// and margin) for it to be read as interface documentation. Attribution-only +/// tags (`@author`, `@see`, `ref:`, …) are excluded — they justify via their +/// own rule and must not masquerade as contracts. +const CONTRACT_LEAD_MARKUP: &[&str] = &[ + "@param", + "@returns", + "@return", + "@throws", + "@raises", + "@exception", + "@example", + "@deprecated", + "@since", + "@type", + "@typedef", + "@property", + "# examples", + "# panics", + "# errors", + "# safety", + ":param", + ":return:", + ":rtype:", + ":raises:", + ":type", + "args:", + "returns:", + "raises:", + "yields:", + "attributes:", + "@brief", + "@details", + "@note", + "@warning", +]; + +/// True when the first content of the comment (after stripping the marker) is +/// a contract tag. +fn leads_with_contract_markup(text: &str) -> bool { + let s = stripped_after_marker(text); + CONTRACT_LEAD_MARKUP.iter().any(|m| s.starts_with(m)) } fn is_non_obvious_intent(text: &str, _comment: &Comment) -> bool { diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index 6528006..942a5aa 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -336,22 +336,75 @@ fn trailing_docstring_with_markup_is_not_a_public_contract() { } #[test] -fn line_comment_in_head_slot_is_not_a_public_contract() { - // `DocstringHead` is positional: a `#` line comment first in a file - // occupies the slot. The comment_type gate is what stops it being read as - // documentation. +fn line_comment_with_lead_contract_markup_is_a_public_contract() { + // U4: contract markup leading a line comment at a contract position is + // interface documentation — the tag is the contract, whatever the comment + // syntax. `DocstringHead` is still positional: what changed is that + // markup-at-start now certifies a *line* comment, where the old rule + // required the Docstring type. use claude_code_comment_checker::classify::classify; use claude_code_comment_checker::{ CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, }; - let mut comment = Comment::new("@param a first addend", 1, CommentType::Line); + let mut comment = Comment::new("Returns: the user", 1, CommentType::Line); comment.context = Some(CommentContext { - adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + adjacent_code: Some("pub fn user() -> User".into()), annotates_declaration: true, scope: Scope::Module, position: PositionRole::DocstringHead, unreliable: false, }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc, + } + ); +} + +#[test] +fn line_contract_markup_mid_sentence_is_not_justified() { + // A prose comment mentioning `@param` mid-sentence is not over-justified: + // the markup must lead the comment to count as a contract. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new( + "use @param only when the code is ambiguous", + 1, + CommentType::Line, + ); + comment.context = Some(CommentContext { + adjacent_code: Some("pub fn add(a: i32, b: i32) -> i32".into()), + annotates_declaration: true, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: false, + }); + assert_ne!( + classify(&comment), + Verdict::Justified { + reason: Justification::PublicApiDoc, + } + ); +} + +#[test] +fn line_contract_markup_beside_a_statement_is_not_justified() { + // A tag trailing a statement or inline with it documents nothing. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("Returns: the user", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("total = 0".into()), + annotates_declaration: false, + scope: Scope::Module, + position: PositionRole::Trailing, + unreliable: false, + }); assert_ne!( classify(&comment), Verdict::Justified { diff --git a/eval/corpus.json b/eval/corpus.json index 7db8be5..d8a966e 100644 --- a/eval/corpus.json +++ b/eval/corpus.json @@ -53,5 +53,6 @@ {"text": "// increment the counter", "code": "counter += 1;", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, {"text": "// returns the user", "code": "pub fn user(id: u64) -> User", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# increments the counter", "code": "counter += 1", "position": "inline", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, - {"text": "# throttle to avoid the rate limit", "code": "sleep(delay)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"} + {"text": "# throttle to avoid the rate limit", "code": "sleep(delay)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, + {"text": "# Returns: the user", "code": "def user(id); end", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "PublicApiDoc"} ] \ No newline at end of file From 287d17b34779847ae0f7847ffb4b5c5ea6c3235e Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 16:06:01 +0000 Subject: [PATCH 07/11] feat(classify): new recall kind NarratesControlFlow with cited construct (U5) Corpus mining found the shape today's rules only catch through the blanket terminal rule: a comment that narrates a loop/iteration the code already expresses, e.g. '# loop over each item' beside 'for item in ...'. It now gets its own kind and a checkable reason naming the construct. - comment.rs: UnnecessaryKind::NarratesControlFlow { construct }. - classify.rs: flow_narration fires when a flow verb (loop/iterate/...) in the comment matches a construct token (for/while/foreach/iter) in the reliable adjacent code, matched against raw keyword tokens because the stop-word list strips 'for'/'in'. Runs after the justification tables, so a loop comment explaining why (backoff, rate limit) is always spared; unreliable fragment context never convicts. - Gate: NarratesControlFlow is asserted on the detected path and exempt from the text-only per-kind floor, where it correctly degrades to RestatesCode (no context, no construct). - Corpus: 2 flow-narration cases + 1 precision case (retry-loop intent). --- crates/comment-checker/src/classify.rs | 63 ++++++++++- crates/comment-checker/src/comment.rs | 4 + crates/comment-checker/src/report.rs | 3 + crates/comment-checker/tests/classify.rs | 116 +++++++++++++++++++++ crates/comment-checker/tests/common/mod.rs | 29 ++++-- crates/comment-checker/tests/f1.rs | 20 ++-- eval/corpus.json | 5 +- 7 files changed, 224 insertions(+), 16 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index b613b1d..2b63400 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -89,8 +89,16 @@ pub fn classify(comment: &Comment) -> Verdict { }) }) .unwrap_or_else(|| { - // The context-aware restatement path is primary; the terminal - // rule (empty evidence) is retained for zero-overlap filler. + // Flow narration is more specific than a bare restatement: a + // comment that narrates a loop/iteration already visible in the + // code names the construct. The context-aware restatement path is + // primary for everything else; the terminal rule (empty evidence) + // is retained for zero-overlap filler. + if let Some(construct) = flow_narration(comment) { + return Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { construct }, + }; + } Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { evidence: restate_evidence(comment), @@ -230,6 +238,57 @@ pub fn restate_evidence(comment: &Comment) -> RestateEvidence { } } +/// Comment verbs that narrate iteration, mapped to the code constructs that +/// express the same thing (U5). Both sides must match for the claim to fire: +/// a verb alone names nothing, a construct alone is silent. +const FLOW_VERBS: &[(&str, &[&str])] = &[ + ("loop", &["for", "while", "foreach"]), + ("loops", &["for", "while", "foreach"]), + ("looping", &["for", "while", "foreach"]), + ("iterate", &["for", "while", "foreach", "iter"]), + ("iterates", &["for", "while", "foreach", "iter"]), + ("iterating", &["for", "while", "foreach", "iter"]), + ("iterated", &["for", "while", "foreach", "iter"]), +]; + +/// The control-flow construct a comment narrates, if any: a flow verb in the +/// comment matched against a construct token in the reliable adjacent code. +/// Word-token matching keeps `format` from satisfying `for`. +fn flow_narration(comment: &Comment) -> Option { + let adjacent = comment + .context + .as_ref() + .filter(|c| !c.unreliable) + .and_then(|c| c.adjacent_code.as_ref())?; + let comment_tokens = ordered_content_tokens(&comment.text); + // Constructs are code keywords (`for`, `while`, `iter`) — matched against + // the raw token stream because the stop-word list would strip `for`/`in` + // from English-heavy code text. + let adjacent_keywords = raw_keyword_tokens(adjacent); + for (verb, constructs) in FLOW_VERBS { + if !comment_tokens.iter().any(|t| t == verb) { + continue; + } + if let Some(construct) = constructs + .iter() + .find(|c| adjacent_keywords.iter().any(|t| t.as_str() == **c)) + { + return Some((*construct).to_owned()); + } + } + None +} + +/// Whitespace/punctuation-delimited tokens with no stop-word stripping. +fn raw_keyword_tokens(text: &str) -> Vec { + let mut seen = std::collections::HashSet::new(); + text.split(|c: char| !c.is_alphanumeric() && c != '_') + .filter(|s| !s.is_empty()) + .filter(|s| seen.insert((*s).to_owned())) + .map(str::to_owned) + .collect() +} + /// The lexical containment of the comment's vocabulary in its adjacent code, /// or `None` when the context is absent or carries no adjacent code. fn lexical_containment(comment: &Comment) -> Option { diff --git a/crates/comment-checker/src/comment.rs b/crates/comment-checker/src/comment.rs index 92c4182..b731c07 100644 --- a/crates/comment-checker/src/comment.rs +++ b/crates/comment-checker/src/comment.rs @@ -126,6 +126,10 @@ pub enum UnnecessaryKind { CommentedOutCode, /// A `TODO`/`FIXME` with no tracked reference. VacuousTodo, + /// A comment that narrates a control-flow construct (`loop`, `iterate`) + /// that the adjacent code already expresses (`for`, `while`, …), with the + /// matched construct cited (U5). + NarratesControlFlow { construct: String }, /// A comment that merely restates what the code already says, with the /// cited overlap that proves the restatement (U3). RestatesCode { evidence: RestateEvidence }, diff --git a/crates/comment-checker/src/report.rs b/crates/comment-checker/src/report.rs index 1855f07..4ab5e6a 100644 --- a/crates/comment-checker/src/report.rs +++ b/crates/comment-checker/src/report.rs @@ -46,6 +46,9 @@ pub fn format_report(flagged: &[Flagged<'_>], file_path: &str, custom_prompt: &s fn reason_text(kind: &UnnecessaryKind) -> String { match kind { + UnnecessaryKind::NarratesControlFlow { construct } => { + format!("narrates the {construct} construct the code already shows") + } UnnecessaryKind::RestatesCode { evidence } => { let mut reason = "restates what the code already says".to_owned(); if !evidence.is_empty() { diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index 942a5aa..2e8c633 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -908,3 +908,119 @@ fn restate_evidence_needs_containment_not_any_overlap() { } ); } + +// U5 — flow narration: a comment that restates a loop/iteration construct. + +#[test] +fn flow_narration_cites_the_construct() { + // `// loop over the items` beside the for-loop it narrates gets a specific + // reason, not the generic restatement fallback. + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// loop over the items", "for item in items: process(item)"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { construct }, + } = &classify + else { + panic!("expected NarratesControlFlow, got {classify:?}"); + }; + assert_eq!(construct, "for"); +} + +#[test] +fn flow_narration_matches_while_for_iterate() { + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// iterate the queue", "while queue: pop()"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { construct }, + } = &classify + else { + panic!("expected NarratesControlFlow, got {classify:?}"); + }; + assert_eq!(construct, "while"); +} + +#[test] +fn flow_narration_requires_the_construct_in_code() { + // A flow verb alone names nothing: without a matching construct token in + // the adjacent code the comment falls through to the restatement path. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// loop the result", "bake(bread)"); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: claude_code_comment_checker::RestateEvidence::default(), + }, + } + ); +} + +#[test] +fn flow_narration_requires_an_actual_flow_verb() { + // `run` is not a flow verb — the construct alone is silent, and the + // comment is a plain restatement, not flow narration. + use claude_code_comment_checker::UnnecessaryKind::{self, NarratesControlFlow}; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// run each item", "for item in items: run(item)"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert_eq!(evidence.lexical, vec!["run".to_owned(), "item".to_owned()]); + assert!(!matches!( + classify, + Verdict::Unnecessary { + reason: NarratesControlFlow { .. } + } + )); +} + +#[test] +fn flow_narration_never_overrides_intent() { + // The justification tables run first: a loop comment that explains *why* + // (backoff, rate limit) is spared, not branded flow narration. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{Justification, Verdict}; + let comment = context_comment( + "// loop with backoff to avoid the rate limit", + "for attempt in attempts: send(request)", + ); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::NonObviousIntent, + } + ); +} + +#[test] +fn flow_narration_does_not_fire_on_unreliable_context() { + // Fragment context cannot vouch for the construct; the conservative + // downgrade applies instead of a flow conviction. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{ + CommentContext, CommentType, Justification, PositionRole, Scope, Verdict, + }; + let mut comment = Comment::new("// loop over the items", 1, CommentType::Line); + comment.context = Some(CommentContext { + adjacent_code: Some("for item in items: process(item)".into()), + annotates_declaration: false, + scope: Scope::Function, + position: PositionRole::Leading, + unreliable: true, + }); + assert_eq!( + classify(&comment), + Verdict::Justified { + reason: Justification::NonObviousIntent, + } + ); +} diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs index b30b852..3481060 100644 --- a/crates/comment-checker/tests/common/mod.rs +++ b/crates/comment-checker/tests/common/mod.rs @@ -125,7 +125,11 @@ pub fn kind_label(kind: &str) -> Label { match kind { "Shebang" | "LicenseHeader" | "GeneratedFile" | "LinterDirective" | "BddStep" | "PublicApiDoc" | "NonObviousIntent" | "Attribution" => Label::Justified, - "AgentMemo" | "CommentedOutCode" | "VacuousTodo" | "RestatesCode" => Label::Unnecessary, + "AgentMemo" + | "CommentedOutCode" + | "VacuousTodo" + | "NarratesControlFlow" + | "RestatesCode" => Label::Unnecessary, other => panic!("unknown kind: {other}"), } } @@ -157,10 +161,16 @@ pub fn synthesize_source(case: &Case) -> String { other => panic!("no docstring snippet for language: {other}"), }; } - match case.position { - PositionRole::Leading | PositionRole::DocstringHead => format!("{text}\n{code}\n"), - PositionRole::Trailing => format!("{code}\n{text}\n"), - PositionRole::Inline => format!("{code} {text}\n"), + match (case.position, case.scope) { + (PositionRole::Leading | PositionRole::DocstringHead, Scope::Function) => { + match case.language.as_str() { + "python" => format!("def f():\n {text}\n {code}\n"), + _ => format!("{text}\n{code}\n"), + } + } + (PositionRole::Leading | PositionRole::DocstringHead, _) => format!("{text}\n{code}\n"), + (PositionRole::Trailing, _) => format!("{code}\n{text}\n"), + (PositionRole::Inline, _) => format!("{code} {text}\n"), } } @@ -208,6 +218,7 @@ pub fn verdict_kind(verdict: &Verdict) -> &'static str { UnnecessaryKind::AgentMemo => "AgentMemo", UnnecessaryKind::CommentedOutCode => "CommentedOutCode", UnnecessaryKind::VacuousTodo => "VacuousTodo", + UnnecessaryKind::NarratesControlFlow { .. } => "NarratesControlFlow", UnnecessaryKind::RestatesCode { .. } => "RestatesCode", }, } @@ -318,10 +329,14 @@ pub fn evaluate(corpus: &[Case], verdicts: &[Verdict]) -> EvalReport { /// `MIN_KIND_PRECISION` precision and `MIN_KIND_RECALL` recall, so a weak kind /// cannot hide inside the aggregate F1. Returns one violation string per /// failing kind. -pub fn per_kind_violations(report: &EvalReport) -> Vec { +/// +/// `context_dependent` names kinds whose detection only exists with structural +/// context (e.g. flow narration); on the text-only path they correctly degrade +/// to another kind, so their floors are not asserted there. +pub fn per_kind_violations(report: &EvalReport, context_dependent: &[&str]) -> Vec { let mut violations = Vec::new(); for (kind, m) in &report.by_kind { - if m.actual < MIN_BUCKET { + if m.actual < MIN_BUCKET || context_dependent.contains(&kind.as_str()) { continue; } let precision = diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs index bf6a1b7..d725b2e 100644 --- a/crates/comment-checker/tests/f1.rs +++ b/crates/comment-checker/tests/f1.rs @@ -50,7 +50,7 @@ fn detected_path_reaches_f1_threshold() { .unwrap_or_else(|| panic!("case not detected: [{}] {:?}", case.language, case.text)) }) .collect(); - run_gate("detected path", &corpus, &verdicts); + run_gate("detected path", &corpus, &verdicts, &[]); } /// The same floors on the text-only path — the floor that must hold wherever @@ -59,10 +59,18 @@ fn detected_path_reaches_f1_threshold() { fn classifier_reaches_f1_threshold() { let corpus = load_corpus(); let verdicts: Vec<_> = corpus.iter().map(predict).collect(); - run_gate("text-only path", &corpus, &verdicts); + // NarratesControlFlow only exists with structural context; on the + // text-only path it degrades to RestatesCode by design, so its floor is + // asserted on the detected path only. + run_gate( + "text-only path", + &corpus, + &verdicts, + &["NarratesControlFlow"], + ); } -fn run_gate(name: &str, corpus: &[Case], verdicts: &[Verdict]) { +fn run_gate(name: &str, corpus: &[Case], verdicts: &[Verdict], context_dependent: &[&str]) { let report = evaluate(corpus, verdicts); eprintln!("=== {name} ==="); eprintln!( @@ -108,7 +116,7 @@ fn run_gate(name: &str, corpus: &[Case], verdicts: &[Verdict]) { report.overall.recall ); - let violations = per_kind_violations(&report); + let violations = per_kind_violations(&report, context_dependent); assert!( violations.is_empty(), "per-kind floor violations on the {name}:\n{}", @@ -150,7 +158,7 @@ fn malformed_corpus_fails_loudly() { fn zero_case_kind_reports_gracefully() { let report = evaluate(&[], &[]); assert!(report.by_kind.is_empty()); - assert!(per_kind_violations(&report).is_empty()); + assert!(per_kind_violations(&report, &[]).is_empty()); } /// The per-kind floor must trip on a kind-level regression even when the @@ -189,7 +197,7 @@ fn per_kind_floor_catches_kind_level_regression() { "scenario requires overall F1 ≥ 0.85 (was {:.3})", report.overall.score ); - let violations = per_kind_violations(&report); + let violations = per_kind_violations(&report, &[]); assert!( violations.iter().any(|v| v.contains("RestatesCode")), "floor must flag the RestatesCode regression; got {violations:?}" diff --git a/eval/corpus.json b/eval/corpus.json index d8a966e..d9597d9 100644 --- a/eval/corpus.json +++ b/eval/corpus.json @@ -54,5 +54,8 @@ {"text": "// returns the user", "code": "pub fn user(id: u64) -> User", "position": "leading", "scope": "module", "language": "rust", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# increments the counter", "code": "counter += 1", "position": "inline", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# throttle to avoid the rate limit", "code": "sleep(delay)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, - {"text": "# Returns: the user", "code": "def user(id); end", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "PublicApiDoc"} + {"text": "# Returns: the user", "code": "def user(id); end", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "PublicApiDoc"}, + {"text": "# loop over each item", "code": "for item in items: dispatch(item)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NarratesControlFlow"}, + {"text": "# iterate the results", "code": "for result in results: emit(result)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NarratesControlFlow"}, + {"text": "# retry the loop to avoid the rate limit", "code": "for attempt in attempts: send(request)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"} ] \ No newline at end of file From f448d5f9f352d01077058f1f144b8a9c499336de Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 16:34:13 +0000 Subject: [PATCH 08/11] refactor(classify): apply simplify review, keep 100% mutation score Three independent review passes (reuse, quality, efficiency) over the U3-U5 diff; all findings applied behavior-preservingly; the mutation gate stayed at 100% throughout (106/106 caught on the final run): - leads_with_contract_markup reuses any_starts; CONTRACT_LEAD_MARKUP is now derived from DOC_MARKUP (minus @see/@author, plus @note/@warning) so the two tables cannot drift. - One shared split_tokens + &str-based dedupe for the content-token and raw-keyword vocabularies (halves per-token allocations). - restate/flow share reliable_adjacent, containment_ratio and the lexical-overlap helper; the classify fallback tokenizes the comment once and shares it between the flow and restate paths; flow only tokenizes the adjacent code when a flow verb is present. - The lowercased adjacent-code copy is gone: symbolic operators are case-free and the only word-like operator matches via the token set. - NarratesControlFlow now cites the (verb, construct) pair, making the verb-match equality observable to tests; flow_construct picks the first verbatim-matching verb row (previously a masked-equivalent double scan that three equality/negation mutants survived). - KindMetrics::precision/recall unify matrix display and floor assertions; the corpus loader stores CommentType directly instead of a mirrored enum; the snippet builder special-cases only python function scope. --- crates/comment-checker/src/classify.rs | 211 +++++++++++---------- crates/comment-checker/src/comment.rs | 9 +- crates/comment-checker/src/report.rs | 2 +- crates/comment-checker/tests/classify.rs | 65 ++++++- crates/comment-checker/tests/common/mod.rs | 68 +++---- crates/comment-checker/tests/f1.rs | 24 +-- 6 files changed, 221 insertions(+), 158 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index 2b63400..9309678 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -93,15 +93,24 @@ pub fn classify(comment: &Comment) -> Verdict { // comment that narrates a loop/iteration already visible in the // code names the construct. The context-aware restatement path is // primary for everything else; the terminal rule (empty evidence) - // is retained for zero-overlap filler. - if let Some(construct) = flow_narration(comment) { + // is retained for zero-overlap filler. The comment is tokenized + // once and shared by both context-aware paths. + let Some(adjacent) = reliable_adjacent(comment) else { return Verdict::Unnecessary { - reason: UnnecessaryKind::NarratesControlFlow { construct }, + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default(), + }, + }; + }; + let comment_tokens = ordered_content_tokens(&comment.text); + if let Some((verb, construct)) = flow_construct(adjacent, &comment_tokens) { + return Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { verb, construct }, }; } Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { - evidence: restate_evidence(comment), + evidence: restate_with_tokens(adjacent, &comment_tokens), }, } }); @@ -173,11 +182,13 @@ const OPERATOR_TABLE: &[(&str, &[&str])] = &[ ("halves", &["/ 2", " /2"]), ]; -/// True when `adjacent` (lowercased) contains the operator `op`. +/// True when `adjacent` contains the operator `op`. /// /// Word-like operators (`return`) match as whole tokens so `add` in /// `address` cannot fire; symbolic operators (`+=`, `+`, `*`) match as -/// substrings, which a parse would confirm in every realistic spelling. +/// substrings. `adjacent` is the raw (non-lowercased) code text: every +/// symbolic operator is case-free, and the only word-like operator matches +/// through the already-lowercased token set. fn code_contains_operator( adjacent: &str, adjacent_tokens: &std::collections::HashSet, @@ -197,39 +208,37 @@ fn code_contains_operator( /// to the terminal text-only rule via empty evidence. #[must_use] pub fn restate_evidence(comment: &Comment) -> RestateEvidence { - let Some(adjacent) = comment - .context - .as_ref() - .filter(|c| !c.unreliable) - .and_then(|c| c.adjacent_code.as_ref()) - else { + let Some(adjacent) = reliable_adjacent(comment) else { return RestateEvidence::default(); }; - let comment_tokens = ordered_content_tokens(&comment.text); + restate_with_tokens(adjacent, &ordered_content_tokens(&comment.text)) +} + +/// Restatement evidence for a reliable adjacent code and the comment's +/// already-tokenized content. +fn restate_with_tokens(adjacent: &str, comment_tokens: &[String]) -> RestateEvidence { if comment_tokens.is_empty() { return RestateEvidence::default(); } let adjacent_tokens = content_tokens(adjacent); - let adjacent_lower = adjacent.to_ascii_lowercase(); - let mut lexical = Vec::new(); + let mut lexical: Vec = Vec::new(); let mut operator = Vec::new(); - for token in &comment_tokens { + for token in comment_tokens { if adjacent_tokens.contains(token) { lexical.push(token.clone()); } if let Some((_, ops)) = OPERATOR_TABLE.iter().find(|(verb, _)| verb == token) { if let Some(op) = ops .iter() - .find(|op| code_contains_operator(&adjacent_lower, &adjacent_tokens, op)) + .find(|op| code_contains_operator(adjacent, &adjacent_tokens, op)) { operator.push((token.clone(), (*op).to_owned())); } } } - let containment = f64::from(u32::try_from(lexical.len()).unwrap_or(0)) - / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)); + let containment = containment_ratio(lexical.len(), comment_tokens.len()); let evidence = RestateEvidence { lexical, operator }; if containment >= RESTATE_CONTAINMENT || !evidence.operator.is_empty() { evidence @@ -238,6 +247,37 @@ pub fn restate_evidence(comment: &Comment) -> RestateEvidence { } } +/// The adjacent code of `comment`, only when its context is reliable. +/// +/// Fragments (Edit/MultiEdit) carry context that may be incomplete at the +/// edge; both context-aware detectors refuse to convict on it. +fn reliable_adjacent(comment: &Comment) -> Option<&str> { + comment + .context + .as_ref() + .filter(|c| !c.unreliable) + .and_then(|c| c.adjacent_code.as_deref()) +} + +/// intersection/total with overflow-safe integer math, shared by every +/// containment computation so the divide cannot drift between callers. +fn containment_ratio(intersection: usize, total: usize) -> f64 { + f64::from(u32::try_from(intersection).unwrap_or(0)) + / f64::from(u32::try_from(total).unwrap_or(1)) +} + +/// The comment's content tokens that also appear in the adjacent code, in +/// comment order. +fn lexical_overlap<'a>( + comment_tokens: &'a [String], + adjacent_tokens: &std::collections::HashSet, +) -> Vec<&'a String> { + comment_tokens + .iter() + .filter(|t| adjacent_tokens.contains(*t)) + .collect() +} + /// Comment verbs that narrate iteration, mapped to the code constructs that /// express the same thing (U5). Both sides must match for the claim to fire: /// a verb alone names nothing, a construct alone is silent. @@ -251,64 +291,63 @@ const FLOW_VERBS: &[(&str, &[&str])] = &[ ("iterated", &["for", "while", "foreach", "iter"]), ]; -/// The control-flow construct a comment narrates, if any: a flow verb in the -/// comment matched against a construct token in the reliable adjacent code. -/// Word-token matching keeps `format` from satisfying `for`. -fn flow_narration(comment: &Comment) -> Option { - let adjacent = comment - .context - .as_ref() - .filter(|c| !c.unreliable) - .and_then(|c| c.adjacent_code.as_ref())?; - let comment_tokens = ordered_content_tokens(&comment.text); +/// The control-flow construct a comment narrates, if any: the first flow verb +/// the comment contains (verbatim, in table order) matched against a construct +/// token in the reliable adjacent code. Word-token matching keeps `format` +/// from satisfying `for`. The (verb, construct) pair is returned so the +/// verdict cites both sides of the match. +fn flow_construct( + adjacent: &str, + comment_tokens: &[String], +) -> Option<(&'static str, &'static str)> { + let (verb, constructs) = FLOW_VERBS + .iter() + .find(|(verb, _)| comment_tokens.iter().any(|t| t == verb))?; // Constructs are code keywords (`for`, `while`, `iter`) — matched against // the raw token stream because the stop-word list would strip `for`/`in` - // from English-heavy code text. + // from English-heavy code text. The adjacent code is only tokenized once + // a flow verb is present in the comment. let adjacent_keywords = raw_keyword_tokens(adjacent); - for (verb, constructs) in FLOW_VERBS { - if !comment_tokens.iter().any(|t| t == verb) { - continue; - } - if let Some(construct) = constructs - .iter() - .find(|c| adjacent_keywords.iter().any(|t| t.as_str() == **c)) - { - return Some((*construct).to_owned()); - } - } - None + let construct = constructs + .iter() + .find(|c| adjacent_keywords.iter().any(|t| t.as_str() == **c))?; + Some((verb, *construct)) } -/// Whitespace/punctuation-delimited tokens with no stop-word stripping. -fn raw_keyword_tokens(text: &str) -> Vec { - let mut seen = std::collections::HashSet::new(); +/// Tokenize `text` on anything that is not alphanumeric or an underscore. +/// Shared by the content-token and keyword vocabularies; case handling stays +/// with each caller. +fn split_tokens(text: &str) -> impl Iterator { text.split(|c: char| !c.is_alphanumeric() && c != '_') .filter(|s| !s.is_empty()) - .filter(|s| seen.insert((*s).to_owned())) +} + +/// Whitespace/punctuation-delimited keywords with no stop-word stripping and +/// no case folding. +fn raw_keyword_tokens(text: &str) -> Vec { + let mut seen = std::collections::HashSet::new(); + split_tokens(text) + .filter(|s| seen.insert(*s)) .map(str::to_owned) .collect() } /// The lexical containment of the comment's vocabulary in its adjacent code, /// or `None` when the context is absent or carries no adjacent code. +/// +/// Deliberately NOT filtered for unreliable context: this feeds the +/// doc-contract revocation and must see the text even on fragments. fn lexical_containment(comment: &Comment) -> Option { - let adjacent = comment - .context - .as_ref() - .and_then(|c| c.adjacent_code.as_ref())?; + let adjacent = comment.context.as_ref()?.adjacent_code.as_deref()?; let comment_tokens = ordered_content_tokens(&comment.text); if comment_tokens.is_empty() { return None; } let adjacent_tokens = content_tokens(adjacent); - let intersection = comment_tokens - .iter() - .filter(|t| adjacent_tokens.contains(*t)) - .count(); - Some( - f64::from(u32::try_from(intersection).unwrap_or(0)) - / f64::from(u32::try_from(comment_tokens.len()).unwrap_or(1)), - ) + Some(containment_ratio( + lexical_overlap(&comment_tokens, &adjacent_tokens).len(), + comment_tokens.len(), + )) } /// English stop-words stripped from content tokens. Compiled separately to @@ -322,10 +361,9 @@ const STOP_WORDS: &[&str] = &[ fn ordered_content_tokens(text: &str) -> Vec { let stripped = strip_comment_marker(text).trim().to_ascii_lowercase(); let mut seen = std::collections::HashSet::new(); - stripped - .split(|c: char| !c.is_alphanumeric() && c != '_') - .filter(|s| !s.is_empty() && !STOP_WORDS.contains(s)) - .filter(|s| seen.insert((*s).to_owned())) + split_tokens(&stripped) + .filter(|s| !STOP_WORDS.contains(s)) + .filter(|s| seen.insert(*s)) .map(str::to_owned) .collect() } @@ -436,47 +474,24 @@ fn is_public_api_doc(text: &str, comment: &Comment) -> bool { } /// Contract markup that must *lead* a non-docstring comment (after its marker -/// and margin) for it to be read as interface documentation. Attribution-only -/// tags (`@author`, `@see`, `ref:`, …) are excluded — they justify via their -/// own rule and must not masquerade as contracts. -const CONTRACT_LEAD_MARKUP: &[&str] = &[ - "@param", - "@returns", - "@return", - "@throws", - "@raises", - "@exception", - "@example", - "@deprecated", - "@since", - "@type", - "@typedef", - "@property", - "# examples", - "# panics", - "# errors", - "# safety", - ":param", - ":return:", - ":rtype:", - ":raises:", - ":type", - "args:", - "returns:", - "raises:", - "yields:", - "attributes:", - "@brief", - "@details", - "@note", - "@warning", -]; +/// and margin) for it to be read as interface documentation. Derived from +/// [`DOC_MARKUP`] so the two tables cannot drift: everything in `DOC_MARKUP` +/// except the attribution-only tags, plus the lead-only additions. +/// +/// The excluded tags (`@see`, `@author`) have no other `DOC_MARKUP` prefix, so +/// the exclusion cannot shadow a contract tag. Attribution tags justify via +/// their own rule and must not masquerade as contracts. +const CONTRACT_LEAD_EXCLUDED: &[&str] = &["@see", "@author"]; +const CONTRACT_LEAD_EXTRAS: &[&str] = &["@note", "@warning"]; /// True when the first content of the comment (after stripping the marker) is /// a contract tag. fn leads_with_contract_markup(text: &str) -> bool { let s = stripped_after_marker(text); - CONTRACT_LEAD_MARKUP.iter().any(|m| s.starts_with(m)) + if any_starts(s, CONTRACT_LEAD_EXCLUDED) { + return false; + } + any_starts(s, DOC_MARKUP) || any_starts(s, CONTRACT_LEAD_EXTRAS) } fn is_non_obvious_intent(text: &str, _comment: &Comment) -> bool { diff --git a/crates/comment-checker/src/comment.rs b/crates/comment-checker/src/comment.rs index b731c07..572537f 100644 --- a/crates/comment-checker/src/comment.rs +++ b/crates/comment-checker/src/comment.rs @@ -127,9 +127,12 @@ pub enum UnnecessaryKind { /// A `TODO`/`FIXME` with no tracked reference. VacuousTodo, /// A comment that narrates a control-flow construct (`loop`, `iterate`) - /// that the adjacent code already expresses (`for`, `while`, …), with the - /// matched construct cited (U5). - NarratesControlFlow { construct: String }, + /// that the adjacent code already expresses (`for`, `while`, …). The + /// cited (verb, construct) pair proves the narration (U5). + NarratesControlFlow { + verb: &'static str, + construct: &'static str, + }, /// A comment that merely restates what the code already says, with the /// cited overlap that proves the restatement (U3). RestatesCode { evidence: RestateEvidence }, diff --git a/crates/comment-checker/src/report.rs b/crates/comment-checker/src/report.rs index 4ab5e6a..53b6621 100644 --- a/crates/comment-checker/src/report.rs +++ b/crates/comment-checker/src/report.rs @@ -46,7 +46,7 @@ pub fn format_report(flagged: &[Flagged<'_>], file_path: &str, custom_prompt: &s fn reason_text(kind: &UnnecessaryKind) -> String { match kind { - UnnecessaryKind::NarratesControlFlow { construct } => { + UnnecessaryKind::NarratesControlFlow { construct, .. } => { format!("narrates the {construct} construct the code already shows") } UnnecessaryKind::RestatesCode { evidence } => { diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index 2e8c633..c6be6c2 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -823,7 +823,7 @@ fn restate_operator_table_requires_the_operator_in_code() { classify(&comment), Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { - evidence: claude_code_comment_checker::RestateEvidence::default(), + evidence: RestateEvidence::default(), }, } ); @@ -885,7 +885,7 @@ fn restate_word_operators_match_as_tokens_not_substrings() { classify(&comment), Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { - evidence: claude_code_comment_checker::RestateEvidence::default(), + evidence: RestateEvidence::default(), }, } ); @@ -903,7 +903,7 @@ fn restate_evidence_needs_containment_not_any_overlap() { classify(&comment), Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { - evidence: claude_code_comment_checker::RestateEvidence::default(), + evidence: RestateEvidence::default(), }, } ); @@ -920,12 +920,13 @@ fn flow_narration_cites_the_construct() { let comment = context_comment("// loop over the items", "for item in items: process(item)"); let classify = classify(&comment); let Verdict::Unnecessary { - reason: UnnecessaryKind::NarratesControlFlow { construct }, + reason: UnnecessaryKind::NarratesControlFlow { verb, construct }, } = &classify else { panic!("expected NarratesControlFlow, got {classify:?}"); }; - assert_eq!(construct, "for"); + assert_eq!(*verb, "loop"); + assert_eq!(*construct, "for"); } #[test] @@ -935,12 +936,13 @@ fn flow_narration_matches_while_for_iterate() { let comment = context_comment("// iterate the queue", "while queue: pop()"); let classify = classify(&comment); let Verdict::Unnecessary { - reason: UnnecessaryKind::NarratesControlFlow { construct }, + reason: UnnecessaryKind::NarratesControlFlow { verb, construct }, } = &classify else { panic!("expected NarratesControlFlow, got {classify:?}"); }; - assert_eq!(construct, "while"); + assert_eq!(*verb, "iterate"); + assert_eq!(*construct, "while"); } #[test] @@ -954,7 +956,7 @@ fn flow_narration_requires_the_construct_in_code() { classify(&comment), Verdict::Unnecessary { reason: UnnecessaryKind::RestatesCode { - evidence: claude_code_comment_checker::RestateEvidence::default(), + evidence: RestateEvidence::default(), }, } ); @@ -1001,6 +1003,53 @@ fn flow_narration_never_overrides_intent() { ); } +#[test] +fn flow_narration_cites_the_exact_verb() { + // A single-token comment pins the verb equality: `loops` must return the + // `loops` entry, not a sibling row with a shared construct list — the + // (verb, construct) pair makes the equality difference observable. + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// loops", "while queue: work()"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { verb, construct }, + } = &classify + else { + panic!("expected NarratesControlFlow, got {classify:?}"); + }; + assert_eq!(*verb, "loops"); + assert_eq!(*construct, "while"); +} + +#[test] +fn flow_narration_verb_row_must_match_the_code_construct() { + // `looping` maps to `for`/`while` constructs only — `iter` belongs to the + // `iterate` family. A mutated continue/equality would let `looping` pick + // up `iter`, which this pins as a non-match. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// looping", "rows.iter().next()"); + assert_eq!( + classify(&comment), + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { + evidence: RestateEvidence::default(), + }, + } + ); +} + +#[test] +fn restate_evidence_wrapper_uses_reliable_adjacent_code() { + // The public wrapper must actually run the detector — the fallback calls + // the inner path directly, so only a direct wrapper test sees it. + use claude_code_comment_checker::classify::restate_evidence; + let comment = context_comment("// counter", "counter += 1"); + let evidence = restate_evidence(&comment); + assert_eq!(evidence.lexical, vec!["counter".to_owned()]); +} + #[test] fn flow_narration_does_not_fire_on_unreliable_context() { // Fragment context cannot vouch for the construct; the conservative diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs index 3481060..fa36d85 100644 --- a/crates/comment-checker/tests/common/mod.rs +++ b/crates/comment-checker/tests/common/mod.rs @@ -30,7 +30,7 @@ pub struct Case { pub position: PositionRole, pub scope: Scope, pub language: String, - pub comment_type: CommentKind, + pub comment_type: CommentType, /// Ground-truth kind: the specific `Justification`/`UnnecessaryKind` name. pub kind: String, pub label: Label, @@ -88,33 +88,15 @@ pub fn parse_corpus(json: &str) -> Vec { .collect() } -fn parse_comment_type(value: &str) -> CommentKind { +fn parse_comment_type(value: &str) -> CommentType { match value { - "line" => CommentKind::Line, - "block" => CommentKind::Block, - "docstring" => CommentKind::Docstring, + "line" => CommentType::Line, + "block" => CommentType::Block, + "docstring" => CommentType::Docstring, other => panic!("unknown comment_type: {other}"), } } -/// The syntactic form of a comment, in the corpus vocabulary. -#[derive(Clone, Copy, Debug, Eq, PartialEq)] -pub enum CommentKind { - Line, - Block, - Docstring, -} - -impl CommentKind { - pub fn comment_type(self) -> CommentType { - match self { - CommentKind::Line => CommentType::Line, - CommentKind::Block => CommentType::Block, - CommentKind::Docstring => CommentType::Docstring, - } - } -} - /// Load the canonical corpus from `eval/corpus.json`. pub fn load_corpus() -> Vec { parse_corpus(include_str!("../../../../eval/corpus.json")) @@ -137,7 +119,7 @@ pub fn kind_label(kind: &str) -> Label { /// Classify a case's text in isolation (no structural context) — the text-only /// floor, which must hold wherever context is unreliable. pub fn predict(case: &Case) -> Verdict { - let comment = Comment::new(case.text.clone(), 1, case.comment_type.comment_type()); + let comment = Comment::new(case.text.clone(), 1, case.comment_type); classify(&comment) } @@ -148,7 +130,7 @@ pub fn predict(case: &Case) -> Verdict { pub fn synthesize_source(case: &Case) -> String { let text = case.text.as_str(); let code = case.code.as_str(); - if case.comment_type == CommentKind::Docstring { + if case.comment_type == CommentType::Docstring { return match case.language.as_str() { // Python docstrings live at the head of a module or body. "python" if case.scope == Scope::Module => format!("{text}\n{code}\n"), @@ -162,11 +144,10 @@ pub fn synthesize_source(case: &Case) -> String { }; } match (case.position, case.scope) { - (PositionRole::Leading | PositionRole::DocstringHead, Scope::Function) => { - match case.language.as_str() { - "python" => format!("def f():\n {text}\n {code}\n"), - _ => format!("{text}\n{code}\n"), - } + (PositionRole::Leading | PositionRole::DocstringHead, Scope::Function) + if case.language == "python" => + { + format!("def f():\n {text}\n {code}\n") } (PositionRole::Leading | PositionRole::DocstringHead, _) => format!("{text}\n{code}\n"), (PositionRole::Trailing, _) => format!("{code}\n{text}\n"), @@ -271,6 +252,28 @@ pub struct KindMetrics { pub correct: u32, } +impl KindMetrics { + /// Precision with floor semantics: a kind that never fires scores zero, + /// so it cannot masquerade as perfect. Display and floor assertions share + /// this so the printed matrix can never disagree with the gate. + pub fn precision(&self) -> f64 { + if self.predicted == 0 { + 0.0 + } else { + f64::from(self.correct) / f64::from(self.predicted) + } + } + + /// Recall against the ground-truth bucket; zero-case kinds score zero. + pub fn recall(&self) -> f64 { + if self.actual == 0 { + 0.0 + } else { + f64::from(self.correct) / f64::from(self.actual) + } + } +} + #[derive(Debug, Default, Clone, Copy)] pub struct LangMetrics { pub tp: u32, @@ -339,9 +342,8 @@ pub fn per_kind_violations(report: &EvalReport, context_dependent: &[&str]) -> V if m.actual < MIN_BUCKET || context_dependent.contains(&kind.as_str()) { continue; } - let precision = - f64::from(m.correct) / f64::from(if m.predicted == 0 { 1 } else { m.predicted }); - let recall = f64::from(m.correct) / f64::from(m.actual); + let precision = m.precision(); + let recall = m.recall(); if precision < MIN_KIND_PRECISION { violations.push(format!( "kind `{kind}` precision {precision:.3} < {MIN_KIND_PRECISION} (predicted {}, correct {})", diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs index d725b2e..2ecc296 100644 --- a/crates/comment-checker/tests/f1.rs +++ b/crates/comment-checker/tests/f1.rs @@ -6,10 +6,10 @@ mod common; use claude_code_comment_checker::{ - Justification, PositionRole, RestateEvidence, Scope, UnnecessaryKind, Verdict, + CommentType, Justification, PositionRole, RestateEvidence, Scope, UnnecessaryKind, Verdict, }; use common::{ - Case, CommentKind, Label, evaluate, load_corpus, parse_corpus, per_kind_violations, predict, + Case, Label, evaluate, load_corpus, parse_corpus, per_kind_violations, predict, predict_detected, }; @@ -79,19 +79,13 @@ fn run_gate(name: &str, corpus: &[Case], verdicts: &[Verdict], context_dependent ); eprintln!("=== per-kind (correct / actual / predicted) ==="); for (kind, m) in &report.by_kind { - let precision = if m.predicted == 0 { - 1.0 - } else { - f64::from(m.correct) / f64::from(m.predicted) - }; - let recall = if m.actual == 0 { - 1.0 - } else { - f64::from(m.correct) / f64::from(m.actual) - }; eprintln!( - " {kind}: {}/{} actual {} predicted (precision {precision:.3}, recall {recall:.3})", - m.correct, m.actual, m.predicted + " {kind}: {}/{} actual {} predicted (precision {:.3}, recall {:.3})", + m.correct, + m.actual, + m.predicted, + m.precision(), + m.recall() ); } eprintln!("=== per-language (tp/fp/fn) ==="); @@ -211,7 +205,7 @@ fn synthetic_case(kind: &str, label: Label) -> Case { position: PositionRole::Leading, scope: Scope::Module, language: "python".into(), - comment_type: CommentKind::Line, + comment_type: CommentType::Line, kind: kind.into(), label, } From a29c34ab63687a8748845cd60bed923efff364ac Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 17:15:43 +0000 Subject: [PATCH 09/11] fix(review): apply validated review findings Twelve of fifteen review findings validated independent of the original reviewers; all applied behavior-preservingly (the remaining three were rejected: file-size preference, unreachable guard narrowing, and a public API removal that would break library consumers). - classify.rs: rewrite the stale module doc (the fallback is no longer a pure fold); mask string literals before flow-construct keyword extraction so print("for the win") cannot cite a phantom 'for' construct; anchor ref:/source: attribution tags to comment starts. - tests: pin the 0.4 containment band (two-of-five shared tokens must stay empty), pin full-payload quote masking (two mutants survived until both payload shapes were exercised), add a corpus row for the string-literal precision case, exercise MultiEdit through the pipeline (restatement supplies a pass, while rules still block). - gate: the detected path now asserts at least one restatement verdict cites evidence, so a detector that silently drops adjacent_code can no longer alias through both F1 gates; per-kind floors now trip when a single-case kind (GeneratedFile) goes wrong, closing the MIN_BUCKET blind spot. - corpus: the fn-scope python docstring case now embeds a valid statement (return fetch_user(user_id)) instead of invalid Python. - README: five kinds with the cited-evidence appendix, context-bearing 60-case corpus, line/block lead-markup sparing, and the Edit restatement-disabled rule documented. Verification: one-shot gate (fmt/clippy/90 tests) green; cargo mutants 117/117 caught (0 missed). --- crates/comment-checker/src/classify.rs | 46 ++++++++++-- crates/comment-checker/tests/classify.rs | 85 ++++++++++++++++++++++ crates/comment-checker/tests/common/mod.rs | 12 ++- crates/comment-checker/tests/f1.rs | 16 ++++ crates/comment-checker/tests/pipeline.rs | 16 ++++ eval/corpus.json | 3 +- 6 files changed, 168 insertions(+), 10 deletions(-) diff --git a/crates/comment-checker/src/classify.rs b/crates/comment-checker/src/classify.rs index 9309678..361dab6 100644 --- a/crates/comment-checker/src/classify.rs +++ b/crates/comment-checker/src/classify.rs @@ -1,7 +1,11 @@ //! The pure classification core: one comment in, one verdict out. //! -//! No I/O, no clock, no randomness, no branches — the decision is a fold over -//! ordered rule tables (CONST-P1, CONST-P2). +//! No I/O, no clock, no randomness. The decision starts as a fold over +//! ordered rule tables (JUSTIFIED then UNNECESSARY); anything unmatched +//! falls through to the context-aware detectors — flow narration, then +//! restatement-with-evidence — and finally the terminal text-only rule. +//! A comment whose structural context is unreliable (Edit/MultiEdit +//! fragment) is never convicted on the catch-all path. use crate::comment::{ Comment, CommentType, Justification, PositionRole, RestateEvidence, UnnecessaryKind, Verdict, @@ -305,15 +309,38 @@ fn flow_construct( .find(|(verb, _)| comment_tokens.iter().any(|t| t == verb))?; // Constructs are code keywords (`for`, `while`, `iter`) — matched against // the raw token stream because the stop-word list would strip `for`/`in` - // from English-heavy code text. The adjacent code is only tokenized once - // a flow verb is present in the comment. - let adjacent_keywords = raw_keyword_tokens(adjacent); + // from English-heavy code text. String-literal payloads are masked first + // so `print("for the win")` cannot cite a construct that isn't there. The + // adjacent code is only tokenized once a flow verb is present. + let adjacent_keywords = raw_keyword_tokens(&mask_literals(adjacent)); let construct = constructs .iter() .find(|c| adjacent_keywords.iter().any(|t| t.as_str() == **c))?; Some((verb, *construct)) } +/// Blank out the payloads of `"..."` and `'...'` string literals so keyword +/// extraction cannot mistake literal content for code constructs. +fn mask_literals(text: &str) -> String { + let mut out = String::with_capacity(text.len()); + let mut quote = None; + for ch in text.chars() { + match quote { + Some(q) if ch == q => { + quote = None; + out.push(' '); + } + Some(_) => out.push(' '), + None if ch == '"' || ch == '\'' => { + quote = Some(ch); + out.push(' '); + } + None => out.push(ch), + } + } + out +} + /// Tokenize `text` on anything that is not alphanumeric or an underscore. /// Shared by the content-token and keyword vocabularies; case handling stays /// with each caller. @@ -499,7 +526,7 @@ fn is_non_obvious_intent(text: &str, _comment: &Comment) -> bool { } fn is_attribution(text: &str, _comment: &Comment) -> bool { - any_contains(text, ATTRIBUTION_MARKERS) + any_contains(text, ATTRIBUTION_MARKERS) || any_starts_after_strip(text, ATTRIBUTION_PREFIXES) } fn is_agent_memo(text: &str, _comment: &Comment) -> bool { @@ -678,10 +705,13 @@ const ATTRIBUTION_MARKERS: &[&str] = &[ "credit", "@see", "@link", - "ref:", - "source:", ]; +/// Attribution tags that only count at the start of the comment (after the +/// marker), so prose that merely mentions `ref:`/`source:` mid-sentence is +/// not read as provenance. +const ATTRIBUTION_PREFIXES: &[&str] = &["ref:", "source:"]; + const AGENT_MEMO_PREFIXES: &[&str] = &[ "changed", "modified", diff --git a/crates/comment-checker/tests/classify.rs b/crates/comment-checker/tests/classify.rs index c6be6c2..808064e 100644 --- a/crates/comment-checker/tests/classify.rs +++ b/crates/comment-checker/tests/classify.rs @@ -909,6 +909,27 @@ fn restate_evidence_needs_containment_not_any_overlap() { ); } +#[test] +fn restate_containment_band_just_below_half_stays_empty() { + // Two of five shared tokens (0.4) must NOT fire: the boundary pins the + // RESTATE_CONTAINMENT band (0.34, 0.5) so lowering the threshold to 0.4 + // changes a real outcome instead of silently passing. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment( + "// alpha beta gamma delta epsilon", + "let alpha = 1; beta(b);", + ); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert!(evidence.is_empty()); +} + // U5 — flow narration: a comment that restates a loop/iteration construct. #[test] @@ -1022,6 +1043,24 @@ fn flow_narration_cites_the_exact_verb() { assert_eq!(*construct, "while"); } +#[test] +fn flow_narration_masking_covers_the_whole_payload() { + // A payload that starts far inside the quote must be masked in full: the + // mutants that blank only the character after the opening quote leave + // `for` of "real for" intact and would fire a phantom construct. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// loop it", "f(\"real for\")"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = &classify + else { + panic!("expected RestatesCode, got {classify:?}"); + }; + assert!(evidence.is_empty()); +} + #[test] fn flow_narration_verb_row_must_match_the_code_construct() { // `looping` maps to `for`/`while` constructs only — `iter` belongs to the @@ -1040,6 +1079,52 @@ fn flow_narration_verb_row_must_match_the_code_construct() { ); } +#[test] +fn flow_narration_constructs_survive_masking_after_the_quote() { + // The masker must close quotes, not swallow the whole remainder: after + // two string literals, the `for` keyword sits in real code and the flow + // verb must match it (kills the mutants that never close a quote). + use claude_code_comment_checker::UnnecessaryKind; + use claude_code_comment_checker::classify::classify; + let comment = context_comment("// loop it", "f(\"x\" + \"y\") for i in range(3)"); + let classify = classify(&comment); + let Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { verb, construct }, + } = &classify + else { + panic!("expected NarratesControlFlow, got {classify:?}"); + }; + assert_eq!(*verb, "loop"); + assert_eq!(*construct, "for"); +} + +#[test] +fn flow_narration_ignores_construct_words_inside_string_literals() { + // `print("for the win")` contains the letters of `for` but no construct: + // string-literal payloads must be masked before keyword extraction, or a + // categorically wrong citation ruins the report. + use claude_code_comment_checker::classify::classify; + use claude_code_comment_checker::{UnnecessaryKind, Verdict}; + let comment = context_comment("// loop the result", "print(\"for the win\")"); + let classify = classify(&comment); + assert!( + !matches!( + classify, + Verdict::Unnecessary { + reason: UnnecessaryKind::NarratesControlFlow { .. } + } + ), + "string-literal construct must not fire: {classify:?}" + ); + let Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } = classify + else { + panic!("expected RestatesCode"); + }; + assert!(evidence.is_empty()); +} + #[test] fn restate_evidence_wrapper_uses_reliable_adjacent_code() { // The public wrapper must actually run the detector — the fallback calls diff --git a/crates/comment-checker/tests/common/mod.rs b/crates/comment-checker/tests/common/mod.rs index fa36d85..4656682 100644 --- a/crates/comment-checker/tests/common/mod.rs +++ b/crates/comment-checker/tests/common/mod.rs @@ -339,7 +339,17 @@ pub fn evaluate(corpus: &[Case], verdicts: &[Verdict]) -> EvalReport { pub fn per_kind_violations(report: &EvalReport, context_dependent: &[&str]) -> Vec { let mut violations = Vec::new(); for (kind, m) in &report.by_kind { - if m.actual < MIN_BUCKET || context_dependent.contains(&kind.as_str()) { + if context_dependent.contains(&kind.as_str()) { + continue; + } + // A 1-case kind cannot hide behind the bucket: recall must be 1.0 or + // its vanish from the classifier (wrong kind on its only case) trips. + if m.actual == 1 && m.correct == 0 { + violations.push(format!( + "kind `{kind}` has a single corpus case and never got it right (actual 1, correct 0)" + )); + } + if m.actual < MIN_BUCKET { continue; } let precision = m.precision(); diff --git a/crates/comment-checker/tests/f1.rs b/crates/comment-checker/tests/f1.rs index 2ecc296..3e12897 100644 --- a/crates/comment-checker/tests/f1.rs +++ b/crates/comment-checker/tests/f1.rs @@ -50,6 +50,22 @@ fn detected_path_reaches_f1_threshold() { .unwrap_or_else(|| panic!("case not detected: [{}] {:?}", case.language, case.text)) }) .collect(); + // The gate must also see the context wiring: at least one restatement + // verdict has to carry cited evidence drawn from the detected adjacency, + // or a detector that silently drops adjacent_code would alias through. + let cited_restates = verdicts + .iter() + .filter_map(|v| match v { + Verdict::Unnecessary { + reason: UnnecessaryKind::RestatesCode { evidence }, + } => (!evidence.is_empty()).then_some(()), + _ => None, + }) + .count(); + assert!( + cited_restates >= 1, + "no detected-path restatement verdict cited evidence; context wiring is broken" + ); run_gate("detected path", &corpus, &verdicts, &[]); } diff --git a/crates/comment-checker/tests/pipeline.rs b/crates/comment-checker/tests/pipeline.rs index d7ea9a8..4cfc145 100644 --- a/crates/comment-checker/tests/pipeline.rs +++ b/crates/comment-checker/tests/pipeline.rs @@ -73,6 +73,22 @@ fn edit_fragment_context_is_never_relied_upon() { ); } +#[test] +fn multi_edit_new_restatement_comment_passes() { + // MultiEdit fragments share Edit's unreliable-context rule: a would-be + // restatement introduced by an edit is spared, not convicted. + let input = r#"{"tool_name":"MultiEdit","tool_input":{"file_path":"foo.py","edits":[{"old_string":"x = 1\n","new_string":"x = 1\n# increment the counter\ncounter += 1\n"}]}}"#; + assert!(matches!(check(input, ""), Outcome::Pass { .. })); +} + +#[test] +fn multi_edit_new_todo_comment_blocks() { + // Explicit text-only rules still block on MultiEdit: the unreliable + // downgrade only spares the restate fallback, never a real rule match. + let input = r#"{"tool_name":"MultiEdit","tool_input":{"file_path":"foo.py","edits":[{"old_string":"x = 1\n","new_string":"x = 1\n# TODO: handle\n"}]}}"#; + assert!(matches!(check(input, ""), Outcome::Block { .. })); +} + #[test] fn report_names_the_reason() { let input = write("foo.go", "// TODO: refactor later\n"); diff --git a/eval/corpus.json b/eval/corpus.json index d9597d9..593ae12 100644 --- a/eval/corpus.json +++ b/eval/corpus.json @@ -31,7 +31,7 @@ {"text": "## Returns the square of x", "code": "def square(x) = x * x", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# section: argument parsing helpers", "code": "def parse_args():", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, {"text": "\"\"\"This is a module docstring.\"\"\"", "code": "import os", "position": "docstring-head", "scope": "module", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, - {"text": "\"\"\"Fetch the user.\"\"\"", "code": "def fetch_user(user_id)", "position": "docstring-head", "scope": "function", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, + {"text": "\"\"\"Fetch the user.\"\"\"", "code": "return fetch_user(user_id)", "position": "docstring-head", "scope": "function", "language": "python", "comment_type": "docstring", "kind": "RestatesCode"}, {"text": "// fmt.Println(\"debug\")", "code": "func main() {}", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, {"text": "# print(x) # debug", "code": "total = 0", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "CommentedOutCode"}, {"text": "// x = x + 1", "code": "var x int", "position": "leading", "scope": "module", "language": "go", "comment_type": "line", "kind": "CommentedOutCode"}, @@ -55,6 +55,7 @@ {"text": "# increments the counter", "code": "counter += 1", "position": "inline", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# throttle to avoid the rate limit", "code": "sleep(delay)", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"}, {"text": "# Returns: the user", "code": "def user(id); end", "position": "leading", "scope": "module", "language": "ruby", "comment_type": "line", "kind": "PublicApiDoc"}, + {"text": "# loop the result", "code": "print(\"for the win\")", "position": "leading", "scope": "module", "language": "python", "comment_type": "line", "kind": "RestatesCode"}, {"text": "# loop over each item", "code": "for item in items: dispatch(item)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NarratesControlFlow"}, {"text": "# iterate the results", "code": "for result in results: emit(result)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NarratesControlFlow"}, {"text": "# retry the loop to avoid the rate limit", "code": "for attempt in attempts: send(request)", "position": "leading", "scope": "function", "language": "python", "comment_type": "line", "kind": "NonObviousIntent"} From 0d43784df555be7b6f4f9c66f23f0ebea18c9c7e Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 17:17:22 +0000 Subject: [PATCH 10/11] docs: refresh hook contract docs for context-aware adjudication README now documents the five verdict kinds with their cited-evidence reasons, the context-bearing 60-case corpus behind the F1 gate, the line/block lead-markup public-API sparing rule, and the Edit/MultiEdit restatement-disabled behavior. AGENTS.md and CLAUDE.md carry the repo's distribution-layer governance updates. --- AGENTS.md | 155 ++++++++++++++++++++++++++++++++++++++++-- CLAUDE.md | 2 +- README.md | 198 ++++++++++++++++++++++++++++++++++++------------------ 3 files changed, 280 insertions(+), 75 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index 3e22fad..5147d34 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -1,14 +1,155 @@ # AGENTS.md +A high-quality, mutation-tested Rust implementation of a Claude Code `PostToolUse` hook that classifies code comments as justified or unnecessary. SOTA engineering: 100% mutation on the core classifier, property-based tests, constitution-aligned, with GitHub releases and npm distribution. + +The npm distribution layer uses Effect v4 RC (see repos/effect/ for vendored sources). Never install, import, or pin `effect@3.*` in the JS side. + ## Directory map | Path | What it holds | -|---|---| -| `repos/effect/` | vendored Effect v4rc | -| `repos//` | other vendored upstream subtrees | -| `subtrees.toml` | registry of vendored subtrees | -| `README.md` | project readme | +|------|---------------| +| `crates/` | Rust core (comment-checker crate) | +| `npm/packages/comment-checker/` | JS/npm wrapper (ESM + Effect v4 RC launcher for the Rust binary) | +| `tests/` | Integration / F1 tests | +| `eval/` | Evaluation corpus | +| `repos/effect/` | Vendored Effect v4rc subtree | +| `.github/workflows/` | CI/release (pnpm + cross-platform Rust) | + +## Startup Workflow + +Before writing code, unconditionally: +1. Confirm the working directory (`pwd`) and the active task (user or task list). +2. Read this file — the whole static surface. No other standing reads. +3. Run the verification commands below and confirm a healthy baseline; repair failures before adding new scope. + +No eager-read mandates: document reads are situational, triggered by the work, never by startup: +- `README.md` — when working in a directory you have not worked in before. +- `ARCHITECTURE.md` — when the task changes a module boundary or data flow. +- Product/requirements docs — when a decision depends on product intent. + +## Working Rules + +- **One task at a time**: finish the active task before starting another. +- **Verification required**: do not claim done without running the verification commands and recording evidence — decisions, bugs, and conventions to the runtime memory system, active work to the task list. +- **Stay in scope**: do not modify files unrelated to the active task; scope reduction requires explicit user approval. +- **Multi-agent**: each agent owns a disjoint file set, claims files before editing, never delegates recursively; the root one-shot verification must pass before any agent claims done. +- **Git discipline**: Master is for releases only and should remain an empty or minimal commit. All work happens on feature branches. Never commit directly to master. Use `git checkout -b feature/...` for new work. Rebase or merge only via PRs. + +## Surface Classes + +Treat repo files as one of four surfaces; read any, mutate only the assigned class. + +| Surface | Examples | Rule | +|---------|----------|------| +| **Locked** | This file, evaluation scripts, merge policy, release workflows | Read and propose changes, never edit to make verification pass. | +| **Editable** | Project code (`crates/`, `tests/`), config, Cargo.toml, npm wrapper | Edit freely within the active task. | +| **Append-only** | `THREAD.md`, experiment logs, rejected ideas, `mutants.out*` artifacts (when tracked) | Append only; never rewrite or delete entries. | +| **Human-controlled** | Main-branch merge, production deploy, credentials, destructive ops, publishing to npm/GitHub under systemfsoftware | Ask the user before acting. | + +## Definition of Done + +A task is done only when ALL are true: +- [ ] Target behavior is implemented. +- [ ] Required verification actually ran (tests / lint / type-check / build / mutation where applicable). +- [ ] Evidence recorded via the runtime memory system and task list. + +## Verification Commands + +These are the checks that must pass. The one-shot gate below runs them as phases: an `&&` between two phases is either a real producer→consumer edge or a deliberate fail-fast gate — a cheap check placed first so an expensive phase is never bought on a trivial failure. Steps of comparable cost with no edge between them belong in the same phase, fanned out under one cap. + +- `cargo fmt --check` +- `cargo clippy --all-targets -- -D warnings` +- `cargo test --all-targets` +- Core classifier mutation (when changing `crates/comment-checker/src/classify.rs`): `cargo mutants --file crates/comment-checker/src/classify.rs --timeout 90` + +```bash +# One-shot verification command (with explicit caps) +CARGO_BUILD_JOBS=4 cargo fmt --check && CARGO_BUILD_JOBS=4 cargo clippy --all-targets -- -D warnings && cargo test -- --test-threads=4 +``` + +**For classifier changes**, the mutants command above must be run. + +```bash +# One-shot verification command (with explicit caps) +CARGO_BUILD_JOBS=4 cargo fmt --check && CARGO_BUILD_JOBS=4 cargo clippy --all-targets -- -D warnings && cargo test -- --test-threads=4 +``` +**Rust/Cargo specifics for manifest resolution**: Commands are direct `cargo` invocations (Cargo.toml serves as manifest; no `[scripts]` like package.json). The gate resolves via the Cargo toolchain present in PATH. The instructions surface names these as the verifiable entrypoints. + +Keep the gate bounded when changing it. Concurrency multiplies: the runner's task cap times each task's own worker pool. For Cargo, use `CARGO_BUILD_JOBS=4` (or CI equivalent) or `-j` where supported to cap; defaults are safe for this small crate but the gate documents the cap. Prefer the runner's CPU-relative cap. Add a phase only when the check gating it is far cheaper than the phase behind it; never chain independent same-cost checks with `&&`, and never fan out uncapped. + +### Anti-Bypass Rules +- Run the full one-shot command, not individual tests in isolation. +- Evidence comes from the current run — never an old CI result or prior session; any failure blocks done, even unrelated-looking ones. +- Never widen the gate's concurrency to make it finish faster; an oversubscribed run is not a passing run. +- Never suppress, skip, or disable checks, or cherry-pick passing tests, to make verification pass. +- Never edit this file or any gate to approve your own work. + +### Hallucination Prevention +- **Search before write**: read current source or type definitions before calling a library API; never invent APIs from training memory. +- **Read before edit**: read a file in this session before editing it. +- **Verify before claim**: "done" requires the verification command to have run in this session with output recorded. +- **Cite, do not invent**: every factual claim about the codebase comes from a tool read in this session. + +## Human Approval Boundaries + +Ask the user before: +- Merging to main/trunk, deploying to production, or releasing. +- Destructive operations (`rm -rf`, dropping databases, deleting migrations). +- Using credentials, tokens, secrets, or destructive tooling. +- Publishing releases or pushing to systemfsoftware org (account/credential mismatch must be resolved first). + +## End of Session + +1. Record current state, blockers, and next steps via the runtime memory system and task list. +2. Commit with a descriptive message once work is in a safe state. +3. Leave the repo restartable: the next session runs verification immediately. + +## Instruction Hierarchy + +This root file is the whole harness until evidence proves otherwise, and the whole static surface (root plus pointer, budgeted at 500 lines). Two truths: code and tests are how things ARE; instruction files carry only how we want things to BE — intent and boundaries. + +A leaf `AGENTS.md` exists only when it passes the earn test: an agent demonstrably got something wrong in that directory, or it carries a non-derivable mandate no ancestor can carry. A package manifest is NOT evidence; a leaf that describes what a directory contains instead of mandating agent behaviour is a descriptive leaf — delete it. Leaf coverage is evidence-gated, never metric-driven; coverage-count leaves are coverage theater that rots. + +Before adding any rule anywhere, run the placement escalation order: (1) delete it, (2) mechanize it — type, lint rule, hook, gate, folder boundary, (3) trigger-load it — skill, (4) situational read when work reaches it, (5) static prose in an instruction file — last resort, for pre-harm universals. + +- A rule lives in exactly ONE file: the highest level it applies to. If a rule here applies to exactly one directory, move it to that directory's leaf. +- Leaf delivery is a one-line pointer (`@AGENTS.md`), never a second manual restating this file. +- The directory map stays high-level: directories and their governance only, never individual files — file-level maps go stale and mislead; files are discovered with tools, not declared here. + +| Directory | Leaf | Why | +|-----------|------|-----| +| `crates/` | no | Rust core governed by root rules and tests | +| `npm/` | no (governed by root) | npm distribution layer (can contain multiple packages/apps under packages/ or apps/) — simple wrapper today | +| `tests/` | no | test harness governed by root verification | + +## Git and Branch Discipline (Project Specific) + +- Master branch must remain an empty or minimal commit (only for tags/releases). +- All development happens on feature branches. +- Create feature branches with `git checkout -b feature/`. +- Never push directly to master; use PRs for integration. +- Before starting work, ensure you are on the correct feature branch; rebase onto latest master only via approved PR. +- Cleanup commits (e.g., gitignore target/, mutants.out) belong on the feature branch before PR. + +Constitution principles (branch-free pure core, mutation-tested classifier, no silent bypasses, evidence before claims) are followed via project tests, gates, and practices. External references are situational only when decisions require them and are not local file dependencies. + +## Project-Specific Notes + +- Core classifier in `crates/comment-checker/src/classify.rs` must maintain 100% mutation score. +- F1 corpus and threshold in `eval/corpus.json` and `tests/f1.rs`. +- npm wrapper lives under `npm/packages/comment-checker/` (the `npm/` folder is the container that can hold multiple packages/apps). The correct platform binary is provided via optionalDependencies. + +## Verification Gate (Staged) + +Run as: +```bash +cargo fmt --check && \ +cargo clippy --all-targets -- -D warnings && \ +cargo test --all-targets +``` +Core classifier mutation (when changing `crates/comment-checker/src/classify.rs`): `cargo mutants --file crates/comment-checker/src/classify.rs --timeout 90` +**For classifier changes** add the mutants step above. -## Effect version +**Rust/Cargo specifics for manifest resolution**: Commands are direct `cargo` invocations (Cargo.toml serves as manifest; no `[scripts]` like package.json). The gate resolves via the Cargo toolchain present in PATH. The instructions surface names these as the verifiable entrypoints. -Effect v4 only. v3 is forbidden — never install, import, or pin `effect@3.*`. +This harness was bootstrapped from the template after subtraction audit (no prior instruction files existed). All rules passed the earn test or escalation order. \ No newline at end of file diff --git a/CLAUDE.md b/CLAUDE.md index 43c994c..eef4bd2 100644 --- a/CLAUDE.md +++ b/CLAUDE.md @@ -1 +1 @@ -@AGENTS.md +@AGENTS.md \ No newline at end of file diff --git a/README.md b/README.md index 507748f..9f30d41 100644 --- a/README.md +++ b/README.md @@ -1,50 +1,55 @@ # comment-checker -A Claude Code `PostToolUse` hook that flags **genuinely unnecessary** code -comments — and, unlike blunt "flag every comment" checkers, **spares the -justified ones** so the warning is worth listening to. +> **comment-checker is a Claude Code hook — an alternative to blunt flag-everything checkers — that blocks only the comments that don't earn their place.** -Built in Rust on tree-sitter (37 grammars, statically linked — no runtime -network, no dynamic loading). A from-scratch, constitution-aligned rewrite of -[`code-yeongyu/go-claude-code-comment-checker`](https://github.com/code-yeongyu/go-claude-code-comment-checker). +Every flag names the specific reason — restates the code, TODO without a tracked ticket, dead code left in a comment, change-log memo — so an agent cannot hand-wave it away. Comments that earn their place are spared: license headers, linter and type-checker directives, public-API docs, and non-obvious intent. -## The problem it solves +```bash +cargo install --git https://github.com/systemfsoftware/comment-checker --package claude-code-comment-checker +``` + +Wired as a `PostToolUse` hook, it runs on every `Write`, `Edit`, and `MultiEdit`, checks the comments in the written code, and blocks the change when any are unnecessary: + +```bash +$ echo '{"tool_name":"Write","tool_input":{"file_path":"src/load_config.py","content":"import json\n\ndef load_config(path):\n # Parse the config file\n data = json.load(open(path))\n # TODO: fix this later\n # print(data)\n return data\n"}}' | comment-checker +An automated reviewer flagged 3 comment(s) in src/load_config.py as unnecessary. -A checker that flags *every* comment trains the AI to dismiss the warning -("this one's justified") — even when it isn't. This checker classifies each -comment and only flags the unnecessary ones, with a **specific reason** the -dismissal can't hand-wave: +Each is stated with the specific reason it should be removed. Do not +dismiss these as "justified" — the reason is given so the claim can be +checked, not argued away. -- `restates what the code already says` -- `a TODO with no tracked reference — file a ticket or delete it` -- `dead code left in a comment` -- `describes what changed, not why — git history already records this` + line 4 — # Parse the config file — restates what the code already says + line 6 — # TODO: fix this later — a TODO with no tracked reference — file a ticket or delete it + line 7 — # print(data) — dead code left in a comment -It **spares** comments that earn their place: license/SPDX headers, linter and -type-checker directives (`# noqa`, `// @ts-ignore`, `eslint-disable`), BDD -steps (`# given/when/then`), public-API docstrings (`@param`/`@returns`/`Args:`), -non-obvious intent (`// workaround:`, `// because`, `// to avoid`), attribution, -shebangs, and generated-file notices. +Action: delete the flagged comments. If the code is unclear without +one, make the code self-explanatory instead — better names, extraction, +a clearer type — and do not re-add the comment. +exit 2 +``` ## Install -### npm +**Status: pre-release.** The npm distribution is built but the first release has not been published yet. Once it lands, npm is the recommended install: ```bash -npm install -g @systemfsoftware/claude-code-comment-checker +pnpm install -g @systemfsoftware/claude-code-comment-checker ``` -The package fetches the prebuilt binary for your platform on install. +The package ships prebuilt binaries for Linux (x64, arm64), macOS (x64, arm64), and Windows (x64) as optional dependencies — npm installs only the one for your platform. No postinstall script runs, so `--ignore-scripts` and strict package managers work. Packages are published with OIDC trusted publishing and provenance. -### GitHub releases +Until then, install from source (works today): -Grab the `comment-checker-.tar.gz` for your platform from -[releases](https://github.com/systemfsoftware/claude-code-comment-checker/releases) -and put the `comment-checker` binary on your `PATH`. +```bash +cargo install --git https://github.com/systemfsoftware/comment-checker --package claude-code-comment-checker +``` -## Setup +Requires Rust 1.85+. Each [GitHub release](https://github.com/systemfsoftware/comment-checker/releases) also attaches `comment-checker-.tar.gz` tarballs for direct download. -Add to `~/.claude/settings.json` (or `.claude/settings.json` in your project): +## Quick Start + +1. Install (above). +2. Add the hook to `~/.claude/settings.json` (or `.claude/settings.json` in a project): ```json { @@ -61,55 +66,114 @@ Add to `~/.claude/settings.json` (or `.claude/settings.json` in your project): } ``` +3. Done. A clean change exits 0: + +```bash +$ echo '{"tool_name":"Write","tool_input":{"file_path":"src/client.py","content":"# SPDX-License-Identifier: Apache-2.0\ndef load(path):\n return open(path).read()\n"}}' | comment-checker +[check-comments] Skipping: No unnecessary comments found +exit 0 +``` + +## What it flags + +Five kinds of comments, each with a stated reason: + +| Kind | Reason given | Example | +|---|---|---| +| Restates the code | `restates what the code already says` (shares tokens, or an operator match) | `// adds one to one` next to `x := 1 + 1` | +| Narrates the flow | `narrates the for construct the code already shows` | `// loop over each item` next to `for item in items:` | +| Change-log memo | `describes what changed, not why — git history already records this` | `// Changed from old_value to new_value` | +| Dead code in a comment | `dead code left in a comment` | `// fmt.Println("debug")` | +| TODO without a ticket | `a TODO with no tracked reference — file a ticket or delete it` | `// TODO: fix this later` | + +Restatement flags cite the evidence: `shares counter; increment ↔ +=` — the +overlap or verb-to-operator match the verdict was built on, so the reason is +checkable against the code. + +## What it spares + +Comments that earn their place are classified as justified and pass: + +- **License and provenance** — SPDX identifiers, copyright lines, generated-file notices (`// SPDX-License-Identifier: Apache-2.0`, `// THIS FILE IS AUTO-GENERATED - DO NOT EDIT`) +- **Directives** — `# noqa: E501`, `// @ts-ignore`, `// eslint-disable-next-line`, `# shellcheck disable=SC2086`, `// clippy::too_many_arguments`, `/* istanbul ignore next */` +- **BDD steps** — `# given`, `# when`, `// then` +- **Public-API docs** — docstrings with `@param`, `@returns`, `Args:`, `Returns:`, `# panics`, `# safety`; likewise line/block comments whose text *leads* with a contract tag (`# Returns: …`, `// @param …`) at a contract position (head of a declaration) +- **Non-obvious intent** — `// workaround:`, `# because …`, `// to avoid the TOCTOU race`, `Why:`, `!NOTE:`, `1-based`/`0-based` conventions +- **Attribution and references** — `// @author`, `// ref: https://…`, `adapted from`, `ported from` +- **Shebangs** — `#!/usr/bin/env python` + +On `Edit` and `MultiEdit`, only **newly added** comments are checked — pre-existing comments in the file never block a change. The fragment may cut off the surrounding code, so restatement detection is disabled on edits: explicit rules still block, but a comment the hook cannot verify against reliable context passes. + +## Why it's different + +Blunt comment checkers flag every comment that isn't on a small allowlist — docstrings included. Most flags are false, and the agent learns to dismiss the warning entirely. + +| | Flag-everything checkers | comment-checker | +|---|---|---| +| Decision | Flag everything not on an allowlist | Classify each comment against ordered rule tables | +| Docstrings | Flagged | Spared when they document an API | +| Reason per flag | Generic warning | One of five specific, checkable reasons | +| Edits | Whole file | Only newly-added comments; restatement disabled on fragments | +| Precision bar | None | F1 ≥ 0.85 on the context-bearing corpus (60 cases, per-kind floors) + +Built in Rust on tree-sitter: 37 languages (Python, TypeScript, JavaScript, Rust, Go, Java, C/C++, C#, Kotlin, Scala, Ruby, PHP, Swift, Elixir, Bash, Lua, SQL, JSON, YAML, TOML, HTML, CSS, Dockerfile, HCL, Markdown, R, Dart, Zig, Haskell, OCaml, Svelte, Elm, Groovy, CUE, Protocol Buffers), statically linked — no runtime network, no dynamic loading. The classifier core is mutation-tested to 100%. + ## Exit codes -| code | meaning | -|------|---------| -| 0 | pass — no unnecessary comments | -| 2 | block — unnecessary comments detected | +| Code | Meaning | +|---|---| +| 0 | Pass — no unnecessary comments found (also for skipped input: malformed payload, no file path, unsupported language) | +| 2 | Block — unnecessary comments found; the report is printed to stdout | + +Malformed input never blocks — a hook must not fail the user's work on bad input. ## Custom prompt +The default report can be replaced; `{{comments}}` inserts it: + ```bash -comment-checker --prompt "Your changes: {{comments}}" +comment-checker --prompt "Your changes contain: {{comments}}" ``` -## Development +To wire it into the hook command in `settings.json`: -```bash -cargo test --all-targets # unit + property + composition + F1 gate -cargo clippy --all-targets -- -D warnings -cargo fmt --check -cargo mutants --file src/classify.rs # mutation gate (100% on the core) +```json +{ "type": "command", "command": "comment-checker --prompt \"Your changes contain: {{comments}}\"" } ``` -The evaluation corpus (50 labeled code comments) lives in `eval/corpus.json` -and is gated by `tests/f1.rs`; the differential harness (`tests/differential.rs`) -asserts this checker beats the original by ≥ 10 F1 points (measured **1.000 vs -0.710**). A wiki-grounded, position-swapped pairwise judge independently -confirmed the Rust checker is more correct on **18/18 disagreement cases**. - -## Constitution conformance - -The classifier is a pure, branch-free fold over ordered rule tables (CONST-P1, -CONST-P2) and is gated at a 100% mutation score on the core (CONST-T3). Two -CONST-G1 judgment calls are declared, not hidden: the hook boundary fails open -to a single `None`/empty result rather than tagged error variants (CONST-D2), -because no caller branches on *why* detection failed — every failure path is -the same deliberate "skip, never block the user"; and `line_number` is an -unbranded `usize` (CONST-D3) because it is only ever read for display, so the -transposition harm the rule exists to prevent cannot occur here. - -## How it works - -1. The hook receives JSON from Claude Code on stdin. -2. It extracts the content written by `Write`/`Edit`/`MultiEdit`. -3. It detects the language from the file extension and parses it with - tree-sitter. -4. It walks the tree for comment nodes and classifies each one — the pure core, - a branch-free fold over ordered rule tables. -5. Justified comments are spared; unnecessary ones are reported with a reason. +The default prompt is tuned for precision. Override only with a tested alternative. + +## Non-goals + +- **No rewriting.** The hook blocks and reports; it does not edit the code or auto-delete comments. +- **Not a linter.** It judges comments only — not style, naming, or architecture. +- **Rule-based, not learned.** A justified comment matching no justification rule can still be flagged, and a noisy one matching a justification pattern can pass. Edge cases belong in the issue tracker. +- **37 languages.** Files in other languages are skipped and exit 0. + +## FAQ + +**Q: `command not found: comment-checker` after install.** +A: The binary isn't on your shell's PATH. `cargo install` puts it in `~/.cargo/bin`; a global npm install puts it in the npm global bin directory. Restart the shell or add the directory to PATH, then re-check. + +**Q: The hook errors with `BinaryNotFound`.** +A: The npm launcher could not find its platform package. This is expected while the npm package is unpublished, or on an unsupported platform (only Linux/macOS x64 + arm64 and Windows x64 exist). Until the first npm release, install with `cargo install --git https://github.com/systemfsoftware/comment-checker --package claude-code-comment-checker`. + +**Q: The hook blocked my write. Do I really have to delete the comment?** +A: Only the flagged ones. Each line names the reason, so verify it against the code. If the code is unclear without the comment, make the code self-explanatory — better names, extraction, a clearer type — and don't re-add the comment. + +**Q: It flagged a comment that is genuinely useful.** +A: The classifier is rule-based and precision-oriented. Open an issue with the comment and the language; the rule tables are the maintained surface for exactly this feedback. + +**Q: It didn't flag a comment I expected it to.** +A: Only the five kinds above are flagged. Also, on `Edit` and `MultiEdit`, only newly-added comments are checked — pre-existing comments pass by design, and restatement detection is disabled because the fragment cannot vouch for the surrounding code. + +**Q: Does it send my code anywhere?** +A: No. It is a local binary that reads the hook payload from stdin and writes to stdout — no network, no dynamic loading, no telemetry. + +## Contributing + +Development setup and workflow: [AGENTS.md](AGENTS.md). ## License -MIT. +Apache License 2.0. See [LICENSE](LICENSE). From f2ac912d0f83caa6147ef3000f65e339060eedd0 Mon Sep 17 00:00:00 2001 From: ryan Date: Sun, 16 Aug 2026 17:23:32 +0000 Subject: [PATCH 11/11] docs(compound): compound the evidence-gated classification learning Solves: how a deterministic classifier cites verified evidence, fails open on fragment-unreliable context, and gates the wiring (F1 evidence assertion, per-kind floors incl. the single-case-kind hole). Verified by 117/117 mutation, pipeline pins, and corpus floors; CONCEPTS.md seeded with the classifier domain vocabulary. --- CONCEPTS.md | 49 ++++++++ ...ence-gated-context-aware-classification.md | 109 ++++++++++++++++++ 2 files changed, 158 insertions(+) create mode 100644 CONCEPTS.md create mode 100644 docs/solutions/design-patterns/evidence-gated-context-aware-classification.md diff --git a/CONCEPTS.md b/CONCEPTS.md new file mode 100644 index 0000000..17c2077 --- /dev/null +++ b/CONCEPTS.md @@ -0,0 +1,49 @@ +# CONCEPTS.md + +Domain vocabulary for comment-checker: words with codebase-specific meaning +that solutions docs and instructions cite without redefinition. + +## Classifier verdicts + +### Restatement (RestatesCode) +A comment that says, in prose, what its adjacent code already says — the +filled-in words or the verb-to-operator mapping (`"increment"` ↔ `+=`) are +the same fact twice. Distinct from a justification, which adds a reason the +code cannot show. + +### Flow narration (NarratesControlFlow) +A comment that names the control construct the adjacent code already +displays (`"loop over each"` beside a `for`) — the kind that reads like +spoken code and adds nothing. + +## Evidence and context + +### Cited evidence (RestateEvidence) +The tokens or verb→operator matches a restatement verdict was built on, +published with the flag so the reason is checkable against the code. A +verdict that cannot cite verified evidence is not emitted. + +### Unreliable context +Structural context (the adjacent-code window) that cannot vouch for the +comment because the input was a fragment: Edit/MultiEdit boundaries truncate +what the hook can see. Verdicts that depend on context never convict on +unreliable context — they fail open (spare). Explicit text-only rules +(unlike restatement) still apply on fragments, because they need no context. + +### Reliable adjacency +The production parse's adjacent-code snippet when the hook had the whole +file and the code window is trustworthy; the only input context-aware +verdicts may cite. + +## Quality gates + +### Per-kind floor +A per-kind/precision-recall gate on the corpus that trips when a kind's +classifier weakens — including a single-case kind that goes wrong — so a +weakness in one kind cannot hide inside an aggregate F1 score. + +## Flagged ambiguities + +- "context" had been used for both the language (scope/position) and the + evidence (adjacent code) — these are distinct; adjacent syntax is the + only context that carries the mention. \ No newline at end of file diff --git a/docs/solutions/design-patterns/evidence-gated-context-aware-classification.md b/docs/solutions/design-patterns/evidence-gated-context-aware-classification.md new file mode 100644 index 0000000..8fd1a38 --- /dev/null +++ b/docs/solutions/design-patterns/evidence-gated-context-aware-classification.md @@ -0,0 +1,109 @@ +--- +title: Evidence-gated, context-aware comment classification +date: 2026-08-16 +category: design-patterns +module: comment-checker (classify.rs) +problem_type: design_pattern +component: service_object +severity: low +applies_when: + - Building a deterministic classifier whose verdicts must cite the evidence they were built on + - The classifier's runtime input is a partial view of its subject (hook fragments, diff gates) + - Structural context (adjacent code) may be missing or unreliable at fragment edges +tags: [classifier, evidence-gated, context-aware, comment-classification, deterministic] +--- + +# Evidence-gated, context-aware comment classification + +## Context + +comment-checker is a Claude Code PostToolUse hook that judges whether each +comment in a write earns its place. The classifier core (classify.rs) folds +ordered rule tables (JUSTIFIED then UNNECESSARY), then falls through to two +context-aware detectors — flow narration, then restatement-with-evidence — +and finally a terminal text-only rule. The trap this pattern exists to +prevent: a verdict that rests on context the input cannot vouch for, or +cites "evidence" the code never showed. + +## Guidance + +1. **Judge the comment against the code it annotates, and cite what you + actually verified.** Restatement evidence is `RestateEvidence { lexical, + operator }`: comment tokens found in the adjacent code's token set, plus + verb→operator table matches (`increment`↔`+=`, `returns`↔`return`, + `loop`/`iterate`/`retry`→`for`/`while`/`foreach`/`iter`). Evidence is + returned only when containment ≥ RESTATE_CONTAINMENT (0.5) or an operator + match fires; otherwise default (no citations), never a guess. +2. **Fragment context is never a conviction.** `reliable_adjacent` is the + single gate — context marked `unreliable` (Edit/MultiEdit boundary + fragments) yields no adjacency; the restatement fallback on unreliable + context is downgraded to `Justified::NonObviousIntent` (fail-open). A + fragment test (tests/pipeline.rs `multi_edit_new_todo_comment_blocks`) + keeps the downgrade scoped to the fallback — explicit rules still block. +3. **Mask content that can fake evidence.** String literals are blanked + before keyword extraction (`mask_literals` → `raw_keyword_tokens`), so + `print("for the win")` can never be cited as a `for` construct. +4. **Contract markup earns sparing when it leads a declaration position.** + A docstring is promoted by markup anywhere; a line/block comment is + promoted only when the markup leads the comment and the comment sits at a + contract position (above a declaration). +5. **Gate the wiring, not just the score.** The F1 gate runs the production + parse→detect→classify path and fails when no detected-path restatement + verdict carries cited evidence — a detector that silently dropped + `adjacent_code` aliases through otherwise. + +### Enforcement (the gates that hold this) + +- Mutation: `cargo mutants --file crates/comment-checker/src/classify.rs + --timeout 90` — 117/117 caught on `feat/sota-comment-adjudication` + (measured 2026-08-16; branch head not yet merged). +- F1 gate: tests/f1.rs `detected_path_reaches_f1_threshold` (+ evidence + assertion), `every_case_is_detectable_end_to_end`. +- Per-kind floors: tests/common/mod.rs `per_kind_violations` trips on a + single-case kind going wrong (`actual == 1 && correct == 0`) and applies + bucket precision/recall floors at `actual >= MIN_BUCKET`. +- Pipeline pins: tests/pipeline.rs edit-fragment fail-open and block-report + evidence rendering (`report_cites_restate_evidence`). +- Corpus: eval/corpus.json is the single source of truth — 60 cases, each + with text/code/position/scope/language/comment_type/kind; malformed JSON + and zero-case kinds fail loudly. + +## Why This Matters + +- The hook **blocks the user's write**: an uninhibited conviction costs a + product telemetry-free, rule-based trust. Every flag is checkable against + the code, so the reason is the contract. +- Without the fragment rule, an Edit that adds a comment near the cut edge + gets convicted on code the edit never saw — the single most common + real-world trigger. +- Without evidence, the floor threshold ("restatement") is unverifiable and + drifts; with it, the report is the audit trail. + +## When to Apply + +- Any rule engine whose input is a partial view: LLM hooks seeing only + written fragments, diff-gated qualifiers, linters classifying without the + AST. +- The fail-open path costs nothing when you always have complete context + (whole-file checkers) and fails open there — the pattern's cost is only + recall on fragments, which is the point (prefer don't-convict). + +## Examples + +- `// increment the counter` beside `counter += 1` → RestatesCode; report + cites `shares counter`, `increment ↔ +=`. +- `# throttle to avoid the rate limit` beside `sleep(delay)` → spared + (NonObviousIntent): shares a surface word but adds a constraint the code + lacks. +- `# Returns: the user` (Ruby line comment above a def) → PublicApiDoc: + contract markup leading a non-docstring at contract position. +- Edit fragment adding `# increment the counter` → hook passes (context + unreliable, downgraded); Edit fragment adding `# TODO: fix` → blocks + (explicit rule still applies). + +## Related + +- Plan (design intent, unedited): ../../plans/2026-08-12-002-feat-sota-comment-adjudication-plan.md +- Product doc: ../../../README.md (five kinds; "restatement detection is + disabled on edits") +- Corpus: ../../../eval/corpus.json \ No newline at end of file