fix(config): refuse Windows device names and trim aliases across the path-guard family (#480, #637) - #725
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…path-guard family (#480) The fourth member of the `platform_util` "must be a path inside the project" family. The other three refuse a value that escapes the tree; this one refuses a value that stays inside it and still names a DIFFERENT path on Windows than it does on POSIX — a reserved device basename, or a component whose trailing periods and spaces Win32 trims away. `skill_tree = "NUL"` is project-relative by every measure the other three apply, and on Windows it is a device. Phase 1 of 6. No call site is wired yet; this is the predicate and its truth table only. `_is_reserved_basename` is referenced in place at its definition site with the sanitizers — Python resolves it at call time, and a pure move would obscure the diff. It is a SEGMENT predicate (it splits on the first dot of the whole string, so it answers False for "sub/NUL"), which is why it is applied per component here. `names_tree_root`'s docstring asserted the opposite of this change as settled law — "`\"foo. \"` strips to `\"foo\"`, names a child, and is accepted" — so its tail is amended to name the new sibling as the member that refuses it, on determinism rather than containment grounds. The rest of that docstring is untouched. The `part.strip(" .") != ""` carve-out is load-bearing, not tidiness: it hands `.`, `...`, `" "` and `".. "` back to `names_tree_root` and plain `..` back to `has_parent_ref`, so all four members refuse DISJOINT sets. That is what makes each one separately ablatable, and it mirrors `names_tree_root`'s own `part != ".."` carve-out one function up. SOURCES. The git half of rule 2 is measured on this repo's suite; the Win32 filesystem half is CITED, not measured — this is a Linux box and nothing here calls a Win32 API. Fetched 2026-08-25, not quoted from memory: Microsoft "Naming Files, Paths, and Namespaces" (the reserved list, the NUL.txt equivalence); Microsoft ".NET File path formats on Windows systems" (the trim rule, and the "prior to Windows 11 ... because this no longer applies with Windows 11" statement); Wine's ntdll path conformance tests, `test_RtlGetFullPathName_U` / `test_RtlIsDosDeviceName_U` against `collapse_path` / `RtlIsDosDeviceName_U` (the per-case Windows 11 narrowing markers, and the NUL carve-out); Project Zero's "The Definitive Guide on Win32 to NT Path Conversion" (2016, so the pre-narrowing mechanism). Two corrections the fetch produced, both carried into the docstring: - Microsoft's published list stops at COM1-COM9 / LPT1-LPT9 and omits CONIN$/CONOUT$ entirely. `_RESERVED_BASENAMES` holds COM0/LPT0 and the console pair, so it is a deliberate SUPERSET, not a transcription of the docs. Wine matches CONIN$/CONOUT$ and rejects the `0` forms. The docstring says so rather than implying the set is a claim about Win32. - The trailing period/space STRIPPING rule is not on the file-naming page at all — that page states only a prohibition ("do not end a file or directory name with a space or a period"). The stripping rule is cited to the .NET path-format page, Project Zero, and Wine's `collapse_path`. - The Windows 11 narrowing is corroborated on two independent axes, and bare `NUL` at a leaf still resolves to the device there; `sub/CON` and `NUL.txt` no longer do. The NUL carve-out is stated by no Microsoft page. We refuse the Windows 10 superset on every platform anyway: a config value must not mean different things by OS build. ABLATIONS, run 2026-08-25 against a `cp` backup of src/bmad_loop/platform_util.py (md5 3357b42411b73f683514dd4d84d1021a, restored byte-identical and `md5sum -c` re-verified after each), singly, graded by NAMED test outcome rather than exit code: - A1, drop the `_is_reserved_basename(part)` term -> 12 failed, 19 passed. test_names_win32_alias_catches_reserved_device_names RED on 12 of its 14 rows. Green there: "PRN " and "CON.", which rule 2 catches without help. test_names_win32_alias_catches_the_trailing_trim (5), _accepts_ordinary_paths (6) and _leaves_the_root_and_parent_spellings_to_its_siblings (6) all stayed GREEN. - A2, drop the `part.strip(" .") != ""` carve-out -> 5 failed, 26 passed. test_names_win32_alias_leaves_the_root_and_parent_spellings_to_its_siblings RED on 5 of its 6 rows. Green there: "", which has no components at all. The other three tests all stayed GREEN. Each rule reddens its own rows and only its own rows: that disjointness is the proof, and it is what will redden if someone later "simplifies" the predicate to a bare rstrip test. `trunk fmt` changed nothing (md5 unchanged), so the ablation record grades the file as committed. Full suite 6740 passed / 49 skipped (baseline 6709 + these 31), pyright 0 errors, trunk fmt + trunk check --all clean over 258 files.
…nd profile paths (#480) Phase 2 of 6: wires `names_win32_alias` into the four config-path validation sites that policy.toml and CLI profiles own — `scm.worktree_seed`, `hooks.config_path`, `skill_tree` and `seed_files`. The plugin manifest and the Unity clone are phase 3. Each site keeps its existing project-relative refusal EXACTLY as it was and gains a SECOND arm with its own message. That is not style: "must be project-relative paths" is simply false for `NUL`, which IS project-relative, and for `.claude/skills.`, which is too. The first three predicates are about containment — does this value leave the tree — and the new one is about determinism: does this value name the same path on Windows that it names here. A seed entry spelling a reserved name resolves to a device rather than to the file it spells, and a component ending in a period or space is created trimmed, so the exclude pattern the shield later renders from the configured spelling names a path that does not exist and is inert. One message grammar across all four, so a single substring matches every test: <dotted.field> entries must not name a Windows device or end a component in a period or space: got {value!r} Singular fields (`skill_tree`, `hooks.config_path`) drop `entries` and the `: got` tail, matching the messages already beside them. This is a deliberate compatibility break on config that previously loaded. It is a refusal, not a warning: the value means one thing on this platform and another on Windows, and a run that quietly seeds a different file than the one configured is the failure the guard exists to prevent. The comment at the policy site records why the refusal is separate rather than a fourth term in the arm above, and points at the predicate's docstring instead of restating the two rules and their sources. ABLATIONS (2026-08-25, HEAD 98ad121 + this change, `cp` backup, restored byte-identical with md5 re-verified and re-run green after each). Four arms deleted singly; graded by named test outcome over `pytest tests/test_policy.py tests/test_profile.py`, unablated 472 passed: - A, `policy.py` `scm.worktree_seed`: 7 failed / 465 passed. RED: all six rows of test_scm_worktree_seed_rejects_win32_alias_entries, plus the new `NUL` row of test_scm_worktree_seed_rejects_a_bad_entry_beside_good_ones. GREEN throughout: test_scm_worktree_seed_rejects_non_project_relative_entries (all 8 rows) and every row of test_profile_rejects_win32_alias_paths. - B, `profile.py` `hooks.config_path`: 2 failed / 470 passed. RED: exactly the two config_path rows. GREEN: the skill_tree and seed_files rows, and all of test_policy. - C, `profile.py` `skill_tree`: 2 failed / 470 passed. RED: exactly the two skill_tree rows. GREEN: the config_path and seed_files rows, and all of test_policy. - D, `profile.py` `seed_files`: 2 failed / 470 passed. RED: exactly the two seed_files rows. GREEN: the config_path and skill_tree rows, and all of test_policy. Four ablations, four DISJOINT red sets. That disjointness is the proof that each site is independently guarded rather than sharing one upstream check — a single guard higher up would have reddened all thirteen rows on any one deletion. `trunk fmt` was run before the ablation baseline, so the record grades the files as committed (source md5s unchanged by it). Full suite 6753 passed / 49 skipped (baseline 6740 + these 13), pyright 0 errors, `trunk check --all` clean over 258 files. No version bump; `worktree_flow.py` untouched.
…t and Unity seed paths (#480) Phase 3 of 6: wires `names_win32_alias` into the three remaining #480 sites the plugin layer owns — `_check_relative_paths` in plugins/manifest.py (which serves BOTH `seed_files` and `seed_globs`), the `[python] module` guard beside it, and the hand-mirrored guard chain in the deployed `unity_seed_assets.py`. policy.py and adapters/profile.py were phase 2; runs.py is phase 4. Both manifest sites keep their existing project-/plugin-relative refusal EXACTLY as it was and gain a SECOND arm, for the reason phase 2 recorded: "must be project-relative paths" is simply false for `NUL` and `.claude/skills.`, both of which ARE project-relative. The first three predicates are about containment; this one is about determinism — does the value name the same path on Windows that it names here. At `[python] module` the consequence is sharper than at the seed fields: that value is imported rather than copied, so a spelling Win32 resolves elsewhere is what gets exec'd. The message keeps each site's own subject spelling (`{label} entries`, and the TOML-table form `[python] module` from the plugin-relative refusal above it) on the one grammar shared by all seven sites, so a single substring matches every test in the family: must not name a Windows device or end a component in a period or space THE UNITY CLONE. `unity_seed_assets.py` is deployed into a consumer project and is stdlib-only — it cannot import core — so `_names_win32_alias` is a hand-written mirror, joining the existing `_is_absolute` / `_has_parent_ref` / `_names_tree_root` clones, with its own `_RESERVED_BASENAMES` and `_is_reserved_basename`. The file is excluded from pyright and had no guard against drift (#546). The clone WAS diffed against the core predicate character by character before this was committed — mechanically, not by eye: the frozenset, `_is_reserved_basename` and the predicate body were extracted from both files and run through difflib with docstrings and comments stripped. `_is_reserved_basename` and the set are IDENTICAL member for member; the predicate body differs only in the private name, the `str | Path` -> `str` signature (matching its three sibling clones, which are all `str`-only) and the dropped `text = str(value)` line it makes unnecessary. The two rule terms are byte-identical. Unlike the manifest sites, the Unity term joins the EXISTING chain rather than adding a second arm — that site's message ("invalid scene guard dir") is not false for a device name, so there is nothing to keep separate. The message is extended to carry the shared substring. `Assets/BmadLoop/Editor.` is the shape that matters there: the caller `.strip()`s only the whole env var, so a trailing dot and every interior component reach the guard untouched. TESTS. `test_manifest_rejects_win32_alias_seed_paths` is parametrized on the FIELD as well as the value, so the claim that one shared helper guards both fields is asserted rather than assumed. The Unity mirror is pinned behaviorally on the core predicate's own 31-row phase-1 truth table (`_names_win32_alias(x) is names_win32_alias(x)`), loaded by path through the `_load_seeder()` helper this file already uses — there was existing precedent for importing it, so no fragile loader was invented — plus a set-equality test, because the truth table cannot reach every member and a device name silently dropped from the clone would simply be seeded. ABLATIONS (2026-08-25, `cp` backup, one arm deleted at a time, each restored and md5-verified against the baseline before the next). Graded by named test node-id over `pytest tests/test_plugin_loader.py tests/test_unity_scene_guard.py`, unablated 122 passed. Baseline md5s: manifest.py 348971b941b6f3bd17ff8c048410ee34, unity_seed_assets.py bfc5f8478474b67c39baf6a29c79f695 (both restored byte-identical and re-run green). - A, `_check_relative_paths` arm: 10 failed / 112 passed. RED: all five rows of test_manifest_rejects_win32_alias_seed_paths in BOTH the seed_files and the seed_globs parametrization, reddening together. That joint reddening is the point of the field axis — it is what proves the one helper is the guard for both fields. GREEN: all four [python] module rows, all 46 Unity rows. - B, `[python] module` arm: 4 failed / 118 passed. RED: exactly its own four rows. GREEN: all ten seed rows, all 46 Unity rows. - C, the Unity chain term `or _names_win32_alias(guard_dir)`: 1 failed / 121 passed. RED: only test_seed_rejects_a_win32_alias_guard_dir_on_any_platform. The 31 parity rows and the set-mirror test stayed GREEN — correctly, and usefully: the parity tests grade the MIRROR, the behavioral test grades the WIRING, and each fails alone. - D, drop `CONIN$` from the CLONE's set only: 2 failed / 44 passed. RED: the CONIN$ parity row and test_seeder_reserved_basename_set_mirrors_core_member_for_member. This is the anti-vacuity check on the parity suite — a mirror test that could not fail would be worse than none on a file nothing else guards. Four ablations, four disjoint red sets. `trunk fmt` was run before the ablation baseline and changed nothing, so the record grades the files exactly as committed. Full suite 6800 passed / 49 skipped (baseline 6753 + 47: 14 manifest rows, 33 Unity), pyright 0 errors, `trunk check --all` clean over 258 files. No existing test or fixture needed changing, so nothing shipped in a bundled plugin.toml trips the new refusal. No version bump; worktree_flow.py untouched; the pyright exclude for `src/bmad_loop/data` left alone.
… the run-dir removals (#480) `_is_path_escape` was the only member of the "must be a path inside the project" guard family that omitted `names_tree_root` — the six sibling sites (policy.py, adapters/profile.py x3, plugins/manifest.py x2) all pair the three. Add it, and add a containment check to the two destructive run-dir writes. What the omission actually cost, measured on this repo: * `""` and `"."` join to the runs ROOT exactly — `Path(runs) / ""` and `Path(runs) / "."` both *are* the runs dir — so `resolve_run_dir`'s exact branch handed that root back whenever a `state.json` was lying at it, and `delete_run` removed it with a bare `shutil.rmtree`. * That precondition is worth stating rather than glossing: without a `state.json` at the runs root the exact branch is inert and the refs fall through to partial matching, which can only yield an enumerated child. The issue's own framing is wider than the measurement supports. * The ref is the operator's own argv, so there is no privilege boundary here. This is a footgun, not an escalation, and is described as one. #480 attributes the defect to `".. "` slipping `has_parent_ref` and reaching `.bmad-loop/`. That is refuted on POSIX: `".. "` resolves to an ordinary one-segment directory INSIDE the runs dir, and there is no escape. `"..."`, `".. "` and `" .."` are refused here for the Win32 half of the rule instead — cited to Microsoft/Wine/Project Zero, not measured, because this is a Linux box: the trim of trailing periods and spaces leaves `..` or nothing there. `names_win32_alias` is deliberately NOT added to this guard. It would make a legacy run dir named `NUL` or `run. ` permanently unaddressable, which is the one thing the guard exists to prevent; refusing to *mint* such a name is `is_valid_run_id`'s job and it already applies `safe_segment` identity. Addressability is otherwise unharmed — skipping the exact branch only defers to partial matching, which still enumerates and still matches a legacy dir by its own spelling. `_refuse_uncontained_run_dir` gates `delete_run` and `archive_run` on `run_dir` being a direct child of the runs dir, ahead of the live-session guard and NOT under `force` (an override is the operator accepting a leaked session, never a licence to rmtree elsewhere). It raises `UnconfinedWriteError` — the shape refusal this module already raises in `_project_of_run_dir` — because observation may degrade but a repair write must not: there is no partial `rmtree` to fall back to. Every existing caller was audited; all seven build `run_dir` from the same `project` they pass, so none is newly refused. No `.resolve()` inside the guard on purpose: `resolve()` can raise on a WSL-UNC host. Ablations (2026-08-25, five arms deleted/moved SINGLY, `cp` backup, all restored byte-identical, md5 083e108a3e81b374092c173f0e4c110a re-verified each time; 11 nodes under `-k "root_naming or outside_the_runs_dir"`, graded by named node outcome, not exit code): A drop `names_tree_root` from the chain -> 2 RED / 9 GREEN, red exactly on the `''` and `'.'` rows (DID NOT RAISE) — the two with POSIX reach. `'...'`, `'.. '`, `' ..'` stay green: they have no POSIX reach to lose, which is the measurement, not a gap in the test. B delete the `delete_run` guard -> 3 RED / 8 GREEN, on DID NOT RAISE. B' move it BELOW the `rmtree` -> 3 RED / 8 GREEN, on the canary assertion — the raise assertion passes. This is why the test asserts the directory SURVIVES: a raise after the removal would pass otherwise. C delete the `archive_run` guard -> 3 RED / 8 GREEN, on DID NOT RAISE. C' move it BELOW its `rmtree` -> 3 RED / 8 GREEN, on the canary. Four disjoint red sets across A/B/C plus the two placement mutants. Suite 6811 passed / 49 skipped (6800 + 11 new), pyright 0 errors, trunk fmt + trunk check --all clean (258 files).
A cycle-1 bundle's name becomes its directory verbatim -- `_write_intent` builds `run_dir/bundles/<name>/intent.md` with no sanitizer on the way in. BUNDLE_NAME_RE's charset is `[a-z0-9-]` with a minimum length of 2, so the reserved Windows device basenames (con, nul, aux, prn, com<N>, lpt<N>) all pass it, and Windows matches them case-insensitively, so lowercase is no reprieve. `safe_segment` already classifies every one of them as unsafe; the two families simply never met on this path. Gate at `validate_triage` rather than sanitizing at `_write_intent`, so a bad name fails loudly at triage where the LLM can be re-prompted and `Bundle.name` keeps meaning exactly one string -- sanitizing at use would split the display name from the on-disk name and leave the `dw-<name>` story key carrying the raw one. The test is `safe_segment` identity, not a hand-written device list, which keeps the accepted set in lockstep with the sanitizer that defines it: the identical idiom, for the identical reason, as `runs.is_valid_run_id`. The new check is guarded on `BUNDLE_NAME_RE.match` so a name failing both gates yields one error. Bounds re-measured against the real `safe_segment` rather than trusted: an exhaustive sweep of every RE-legal name of length 2-4 fails identity on exactly the device-name families and nothing else; cycle > 1 is unexposed because the directory is `c<cycle>-<name>`, which no prefix leaves in the reserved set; and length cannot reach the gate, since RE caps a name at 40 and MAX_SEGMENT is 120. The Win32 filesystem half of the premise is cited, not measured -- this is a Linux box. 19 new nodes in tests/test_sweep.py. Two single ablations, disjoint red sets: deleting the gate reddens the 8 reserved-name rows alone; dropping the `BUNDLE_NAME_RE.match` guard reddens the 4 fails-both-gates rows alone. Those 4 rows exist because a lowercase device name passes the regex, so it can only ever raise one error -- the guard is unobservable without an input that trips both checks.
`validate_triage` gates bundle names in TWO places, and phase 5 landed only
the first. The other is a decision option's `bundle_name`, validated against
BUNDLE_NAME_RE alone. It is not inert: a build-effect option's `bundle_name`
becomes `Bundle.name` in `_materialize_bundles`, which feeds `_run_bundle` ->
`dirname` -> `_write_intent` -- the same cycle-1 directory, by the same
mechanism, so `con`/`nul`/`com1` reached it exactly as they did through the
`bundles` loop.
Two lines of the identical shape as the sibling gate, with the message
keeping this site's own subject spelling (`bundle_name`, and the
`decision {id} option {key}:` prefix the checks beside it use) on the
"is not a legal path segment" grammar shared with the `bundles` loop, so one
substring matches both. Guarded on `BUNDLE_NAME_RE.match` for the same
one-error-per-name reason -- and, unlike at the sibling site, that guard
carries a SECOND duty here: an option's `bundle_name` is optional, and
`safe_segment("")` is non-identity, so an unguarded identity test would
report an error for every option that names no bundle at all.
ABLATIONS (2026-08-25, `cp` backup, arms applied SINGLY, restored
byte-identical with md5 b4914b2254f7806e58eb46cb7fe6f10c re-verified each
time; 15 nodes under `-k "reserved_device_option or one_option_error or
ordinary_option"`, graded by NAMED NODE OUTCOME rather than exit code):
A delete the identity gate -> 8 RED / 7 GREEN, red exactly on
the reserved-device rows.
B drop `BUNDLE_NAME_RE.match(...) and` -> 15 RED, ALL of them. Not the
expected 4: the bare drop also loses the absent-name skip, so every
filler `keep-open` option reports on its empty `bundle_name`. That is
the site difference above, measured rather than reasoned.
B' drop only the match TERM, keeping a truthiness skip -> 4 RED / 11 GREEN,
red exactly on the fails-both-gates rows. This is the arm that isolates
the double-report property, and its red set is disjoint from A's.
The fails-both-gates rows (`CON`, `nul.`, `aux.txt`, `lpt9 `) exist for the
reason phase 5 recorded: a lowercase device name PASSES BUNDLE_NAME_RE, so it
raises exactly one error with or without the guard, and an error-count
assertion over such names is green either way. Only an input failing both
gates can observe the guard at all.
The out-of-band path is deliberately untouched: `_materialize_bundles` also
honours `answer["bundle_name"]` from a pre-answer that never passes
`validate_triage`. That is wider than this program characterized and no phase
has measured it; it is recorded in the PR body as residual work.
Suite 6845 passed / 49 skipped, pyright 0 errors, `trunk fmt` left this file
byte-identical so the ablation record grades it as committed.
…h-guard family (#480) #480's item 4 asks six anchoring helpers to swap stdlib `Path.is_absolute()` for `platform_util.is_absolute_path`, on the claim that a root-anchored operand is "joined under paths.project" on Windows. The mechanism is refuted: Windows joins such an operand by keeping the base's DRIVE and discarding the rest, so `/etc/passwd` under `C:\proj` lands at `C:\etc\passwd` -- OUTSIDE the project, not under it. The swap yields the identical result there and LOOSENS `C:foo`, which stdlib resolves to the contained `C:\proj\foo` and the family predicate would pass through. So item 4 ships as a documentation outcome. No swap is performed. recovery_flow.py's `_restore_attempt_owned_spec_bytes` is the one genuine REFUSAL guard in the tree built on stdlib `is_absolute()` -- the category the issue asserts does not exist. It fails CLOSED on Windows (a POSIX-absolute spelling reads as not-absolute there, so it raises) and `is_absolute_path` would answer True and open it. A comment records that, because the next path-guard sweep would otherwise "fix" it. The question at that site is the platform's own: a live path this process is about to `resolve(strict=True)` and write through on the host it is running on -- the opposite of the "must stay inside the project" question the family predicate is built for. Same shape of note, for the same reason, as `runs._state_base`'s. `verify.resolve_spec_path` had no docstring. It gains one stating the RULE its 14 call sites follow rather than an enumeration that would drift -- but NOT the rule the plan proposed. "A repair write pairs it with `spec_within_roots`; an observer does not" is a biconditional, and it is false in both directions: two callers that write nothing (the attempt-binding observations) DO check, and two that write (the post-dev board sync, the sweep bundle's ledger close) do NOT. The rule that actually holds is positive-only and scoped to the spec: a caller that goes on to REWRITE the spec must pair this with `spec_within_roots` first. The two unpaired writers are named and their reason given -- they write to a deterministic orchestrator-owned target, so an out-of-tree spec steers what they write and never where. DOCS. FEATURES.md's seeding and git-add-shield bullets record that the pathological spellings are now refused at config load, so the render site never sees one -- which is the only direction in which the trailing-space case closes, since PR #708's escaping fixed the gitignore parse and still named a path `mkdir` never created. porting-to-a-new-os.md gains a section on the four predicates: `platform_util` was named nowhere under docs/ before this. testing.md's "currently exactly four" conftest fixtures is corrected to five (`_isolate_state_root` was added and the doc was not). CHANGELOG under `## [Unreleased]`: the config refusal under `Changed`, led by the compatibility break; the `_is_path_escape` parity + run-dir containment and the bundle-name gate under `Fixed`. No version bump -- `sync_version.py` owns those and the bump is a separate release PR. The break makes the next release a MINOR. ABLATION for the new recovery_flow test (2026-08-25, `cp` backup, restored byte-identical with md5 b39204d831954e3c4c45902fb85914a2 re-verified, graded by named node outcome): 1 delete `not spec_path.is_absolute()` ALONE -> GREEN. Measured, and it is the finding rather than a hole: on POSIX the `resolve(strict=True)` fixed-point term below subsumes it, because a relative path never equals its own resolve. The term is load-bearing on Windows only, so no POSIX test can protect it from deletion -- the comment is what has to, which is precisely why it was worth writing. 2 delete the WHOLE refusal -> RED, on the CANARY (`assert not spec.parent.exists()`), with the `pytest.raises` assertion still GREEN: the post-mkdir recheck below still fires on the relative parent, so something raises after `mkdir` has already run. Phase 4's raise-vs-canary lesson, reproduced exactly -- a refusal test asserting only the raise would have passed against a guard that had already created the directory. Full suite 6846 passed / 49 skipped (baseline 6830 + 16), pyright 0 errors, `trunk fmt` (which touched only the new doc section) then `trunk check --all` clean over 258 files. `git grep names_win32_alias src/` shows the definition, the Unity clone's definition, and SEVEN call sites -- all wiring landed.
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Included review availability: Your plan provides up to 2 included reviews per hour; 0 remain after this review. WalkthroughThe change adds platform-independent Windows path-alias validation for configuration and seeding. It hardens run deletion and archiving containment, validates sweep bundle names, and adds regression tests and portability documentation. ChangesPath and filesystem safety
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Full details: Linked Issues checkExplanation The changes satisfy Full details: Out of Scope Changes checkExplanation The code, tests, documentation, changelog, and recovery-flow comments support the path-guard, run-containment, anchoring, exclude-handling, and bundle-name objectives in Full details: Docstring CoverageExplanation Docstring coverage is 73.13% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 67 functions across 17 files. (2 skipped: 2 unsupported.) ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
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Inline comments:
In `@src/bmad_loop/platform_util.py`:
- Around line 261-267: Update the path-component validation around
_is_reserved_basename and the existing strip check to reject components
consisting only of periods or spaces when the full path is not root-only, while
continuing to delegate root-only spellings to names_tree_root. Add regression
coverage for sub/..., sub/.. , and sub/ , ensuring these aliases are rejected.
In `@src/bmad_loop/runs.py`:
- Around line 1641-1668: Update _refuse_uncontained_run_dir to reject
run_dir.name values of "." or ".." before reconstructing and comparing with
run_dir_for, while preserving the existing containment check for all other
names. Add test cases for both dot names to the containment test matrices,
covering the destructive delete and archive paths as applicable.
In `@tests/test_unity_scene_guard.py`:
- Around line 231-243: Add a docstring sentence to
test_seed_rejects_a_win32_alias_guard_dir_on_any_platform documenting removal of
_names_win32_alias(guard_dir) from the validation chain and stating that every
parameterized evil path must fail the test.
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| shape-refusal this module already raises for the same class of mistake (see | ||
| :func:`_project_of_run_dir`), and being an ``OSError`` it lands in the | ||
| handling callers already have for a removal that failed.""" | ||
| if run_dir_for(project, run_dir.name) != run_dir: |
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When .bmad-loop/runs is a symlink to a directory outside the project, run_dir_for(project, run_dir.name) is lexically identical to run_dir, so this guard accepts it; shutil.rmtree(run_dir) then follows the symlinked ancestor and deletes the external run directory. Both delete_run and archive_run therefore bypass the new containment guarantee unless the path walk rejects redirects or verifies resolved containment before the destructive write.
AGENTS.md reference: AGENTS.md:L81-L81
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Fixed in d475aaa. _refuse_uncontained_run_dir now walks every level below project — the run dir, runs, .bmad-loop — with is_link_like (not is_symlink: on Windows the unelevated redirect is a directory junction, which is_symlink reports False for) and raises UnconfinedWriteError on any redirect, ahead of both destructive writes and not waived by --force. It stops short of project itself — the operator's own argument, legitimately reachable through a symlinked home. It is check-then-act rather than fd-anchored (resolve() is banned at this site for the WSL-UNC raise, and tarfile cannot take a dir fd), with the residual documented; the racer that could re-plant between check and rmtree is a live session, which the guard below this one refuses anyway. Tests: three delete arms (one per level) plus an archive twin, canaries in the redirect target; ablation eats the external run on the ancestor arms.
| return ( | ||
| is_absolute_path(ref) | ||
| or has_parent_ref(ref) | ||
| or names_tree_root(ref) |
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When the project contains exactly one run, names_tree_root("") only skips the exact-path branch and then the empty ref matches that run because every name starts and ends with "". Consequently bmad-loop delete "" or archive "" operates on the sole run instead of raising RunRefError; the new test hides this by creating two runs, making the same fallback appear safely ambiguous. Root-naming refs need to be rejected before entering partial matching.
AGENTS.md reference: AGENTS.md:L81-L81
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Fixed in d475aaa. Confirmed — with exactly one run, "" skipped the exact branch and partial-matched the sole run (startswith("")/endswith("") are true for every name). resolve_run_dir now refuses an empty ref outright, before partial matching, so the refusal cannot depend on how many runs exist. Scoped to "" rather than every root-naming ref on purpose: no directory can be named "", so nothing loses addressability, while "..." etc. keep the partial fallback that the escape guard's docstring promises for legacy dir names. New single-run test added; the two-run test's ablation record updated ("" is now refused upstream, so ablating names_tree_root reddens the "." row alone).
| or _names_tree_root(guard_dir) | ||
| or _is_absolute(guard_dir) | ||
| or _has_parent_ref(guard_dir) | ||
| or _names_win32_alias(guard_dir) |
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When BMAD_LOOP_UNITY_SCENE_GUARD_DIR itself ends in a space, such as Assets/BmadLoop/Editor , line 230 strips that space before this new predicate sees the value. The seeder therefore installs into Editor and returns success rather than refusing the authored trailing-space component as the new validation contract and error message promise; retain the raw value for validation and only use trimming to detect an empty setting.
AGENTS.md reference: AGENTS.md:L81-L81
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Fixed in d475aaa. .strip() now only decides whether the env var is set — guard_dir = raw if raw.strip() else _DEFAULT_GUARD_DIR — so validation sees the authored value and Assets/BmadLoop/Editor is refused like at every other site instead of silently installing into Editor. A whitespace-only value still falls back to the default (unset semantics, unchanged). The behavioral test gained that row plus Assets/...; ablation restoring the old strip-before-validate composition reddens the trailing-space row alone. Stale comments referencing the old strip (the root-naming test's and the clone's _names_tree_root docstring) updated.
…nd run containment (#480) Review round 1 (CodeRabbit + codex), all six findings validated against the code and fixed: - names_win32_alias: an all-period/space component embedded beside a real one (sub/...) slipped all four family members — names_tree_root demands every component be root-naming and the old carve-out excluded such components unconditionally. Rule 2 is now scoped by the whole value (not root_naming), with . and .. carved out for their owners. Unity clone mirrored; parity and behavioral rows extended. - _refuse_uncontained_run_dir: a run_dir spelled runs/.. has .name == '..' and the direct-child rebuild reproduces it verbatim, so rmtree would resolve it to .bmad-loop itself; refused by name. A run-dir level redirected through a symlink (or win32 junction — is_link_like, not is_symlink) kept the lexical spelling while sending the removal outside the project; refused by an lstat-family walk over the orchestrator-owned levels, stopping short of the operator's own project argument. - resolve_run_dir: an empty ref is a prefix and suffix of every id, so partial matching read it as a wildcard and resolved the sole run of a one-run project; refused outright (no directory can be named '', so no addressability is lost). - unity_seed_assets: the env value was .strip()-ed before validation, so an authored trailing space was silently trimmed instead of refused; .strip() now only detects an unset/blank setting and validation sees the raw value. - test_unity_scene_guard: the behavioral wiring test now records its exact ablation mutation, per the testing doctrine. Every new gate ablation-graded singly with disjoint red sets; the redirect tests' measured failure kinds are recorded in their docstrings.
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| # Separate arm, same reason as `_check_relative_paths`, and it bites harder here: | ||
| # this value is not copied but *imported*, so a module spelled `NUL` or `hooks.` | ||
| # resolves on Windows to something other than the file the manifest names. | ||
| if names_win32_alias(module): |
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When [python].module ends in a space, such as module = "hooks.py ", _parse_python strips the authored value on line 190 before this new predicate runs, so the manifest is accepted and stores hooks.py instead of raising the promised alias error. This makes this validation site silently normalize exactly the trailing-space spelling the new cross-platform contract says must fail; validate the raw value before any trimming.
AGENTS.md reference: AGENTS.md:L81-L81
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Fixed in 8b4e45d. Same class as the Unity finding, same fix shape: .strip() now decides only whether a module was given — if not module.strip() — and validation plus the stored PythonSpec.module use the authored value, so module = "hooks.py " is refused with the promised alias error. Audited the other six sites for the same strip-before-validate composition: manifest _check_relative_paths (seed_files/seed_globs), profile hooks.config_path/skill_tree/seed_files, and policy worktree_seed all validate raw values — this was the last one. New "hooks.py " row added; ablation restoring the strip reddens it alone.
| # `BUNDLE_NAME_RE` is no more able to express the rule here than there. | ||
| # Guarded on the match above so one bad name yields one error, and on | ||
| # nothing else: an absent `bundle_name` fails that match already. | ||
| if BUNDLE_NAME_RE.match(bundle_name) and safe_segment(bundle_name) != bundle_name: |
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When an existing .bmad-loop/decisions.json contains a pre-upgrade build answer whose bundle_name is nul/con and a fresh triage renumbers or removes that option, this check validates only the fresh option; _materialize_bundles explicitly falls back to the persisted answer at lines 1359-1361, bypassing the new gate and passing the reserved name to _write_intent as a directory. On Windows the resumed sweep therefore still fails while creating the bundle, so persisted answers need the same path-segment validation before materialization.
AGENTS.md reference: AGENTS.md:L78-L78
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Fixed in 8b4e45d. This was the residual the PR body had recorded for follow-up — confirmed reachable exactly as you traced it: a pre-answer whose key no longer maps to a current option falls back to answer["bundle_name"] verbatim at _materialize_bundles, bypassing both option-site gates. The same two rules (BUNDLE_NAME_RE + safe_segment identity) now gate that lane, by journaled discard (sweep-bundle-name-discarded) rather than by error: the human's build decision is the payload and the always-legal decision-<id> fallback is what an unnamed answer gets anyway — mirroring the existing sweep-bundle-name-normalized repair precedent at the fresh-triage boundary. New unattended-sweep test with a persisted bundle_name="nul" answer; ablation dropping the gate reddens it alone. PR body updated to record the closure.
The directory spelling was itself Win32-divergent: with nothing seeded, (tmp_path / 'Assets' / '...').exists() is True on Windows because the trim resolves '...' to Assets — the Windows CI legs failing on it is a measured live demonstration of the rule under test. The payload-file spelling grades on both platforms.
…r bundle names (#480, #637) Review round 2 (codex), both findings validated and fixed: - manifest._parse_python stripped the module value before the alias arm ran, so an authored trailing space (module = 'hooks.py ') was silently trimmed and accepted instead of refused — the one site of seven whose value the family never saw raw. .strip() now decides only whether a module was given; validation and the stored value use the authored spelling. The other six sites were audited and already validate raw values. - A pre-answer's bundle_name never passes validate_triage (a fresh triage can renumber or drop the option it answered), so the persisted-answer fallback in _materialize_bundles was the one route by which a name failing the two option-site gates still reached _write_intent as a directory. The same two rules now gate that lane, by journaled discard (sweep-bundle-name-discarded) rather than by error — the build decision is honored under the always-legal decision-<id> fallback, mirroring the sweep-bundle-name-normalized repair precedent. This closes the residual the PR body had recorded for follow-up; the body is updated accordingly. Both gates ablation-graded singly: restoring the manifest strip reddens the 'hooks.py ' row alone; dropping the discard gate reddens the new pre-answer test alone.
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Closes #480
Closes #637
platform_utilgrows a fourth member of its "must be a path inside the project"predicate family, and it is wired into every config-path validation site in the tree.
The first three predicates are about containment — does this value escape the
project. The new one,
names_win32_alias, is about determinism: does this valuename the same path on Windows that it names here.
A config value that spells a reserved Windows device basename (
NUL,aux.json,COM1) resolves to a device rather than to the file it spells; a component ending ina trailing period or space is created with that character trimmed away, so the path
the operator authored and the path Win32 creates are different strings. Both are now
refused at config load, on every platform.
What each phase landed
98ad1210platform_util.names_win32_alias— the predicate, its sourced docstring, and the amendment tonames_tree_root's docstring, which asserted the opposite of this change as settled law. 31 table-driven tests. No call site wired.4d6241fescm.worktree_seed(policy.py) andhooks.config_path/skill_tree/seed_files(adapters/profile.py). 13 new rows.4d7bc02aplugins/manifest.py—_check_relative_paths(one helper serving bothseed_filesandseed_globs) and[python] module— plus a hand-mirrored_names_win32_aliasin the deployed, stdlib-onlyunity_seed_assets.py. 47 new tests.3c9b0857runs.py:names_tree_rootinto_is_path_escape(family parity), and_refuse_uncontained_run_dirgatingdelete_run/archive_run. 11 new nodes.5a784a71safe_segmentidentity gate on bundle names invalidate_triage. 19 new nodes.84f2f668,a088db29Seven wiring sites, one message grammar, so a single substring matches every test in
the family:
Four of #480's own claims were refuted on re-measurement
#480 was filed 2026-08-07; PRs #479, #708, #712 and #724 have landed since, so every
line anchor in the issue is stale. Four validation passes re-measured every claim
against HEAD
cca32a35before any code was written. No issue comments were filed —this PR body is the public record of the corrections.
1. Item 4's mechanism is factually wrong, so item 4 ships as documentation, not a
code swap. The issue asks six anchoring helpers to use
platform_util.is_absolute_pathinstead of stdlib
Path.is_absolute(), on the claim that on Windows/etc/passwd"isjoined under
paths.project". Measured: Windows joins a root-anchored operand bykeeping the base's drive and discarding the rest, so
/etc/passwdunderC:\projlands at
C:\etc\passwd— outside the project, not under it. The proposed swapproduces the identical result for that input and loosens
C:foo, which stdlibresolves to the contained
C:\proj\fooand the helper would pass through untouched.The issue's "all have
spec_within_rootsbackstops" holds for 1 of 6 named sites.The swap was not performed. What shipped instead is a comment at the one genuine
refusal guard and a docstring stating the rule the call sites actually follow.
2. Item 2's "authored value vs normalized value" framing is a no-op. The issue asks
the shield to render its exclude pattern from the normalized value the copy loop uses
rather than the raw config string. There is no normalized value: the copy loop
(
worktree_flow.py:963-964) and the render site (:1200) use the identicalauthored string. The real divergence is string-versus-what-Win32-creates-at-
mkdir,which is why item 2 collapses into item 1's predicate and needs no
worktree_flow.pychange at all. Refusing the pathological spellings at load means the render site never
sees one.
3. PR #708 inverted the trailing-space case. The issue says the space case "agrees
by luck" and only the trailing dot diverges. That was true at filing and is false now:
#708 escaped the trailing space to
/skills\, which fixed POSIX and broke Windows thesame way the dot was already broken. Space and dot are one defect with one shape, and
this PR closes both by refusing the spelling upstream.
4. Item 3's reach is wrong, and the real gap is a different one. The issue
attributes the defect to
".. "slippinghas_parent_refand reaching.bmad-loop/.On POSIX
".. "resolves to an ordinary one-segment directory inside the runs dir— there is no escape. The actual gap:
_is_path_escapewas the only member of theseven-site family omitting
names_tree_root, so""and"."join to the runsroot exactly, and
delete_runremoved it with a bareshutil.rmtree.reach exists only when a
state.jsonis lying at the runs root:resolve_run_dir'sexact branch is gated on
is_run(exact), so without one,""and"."fall throughto partial matching, which can only yield an enumerated child, an ambiguity error, or
"no such run" — never the root. The parity gap and the missing containment are both
real and both fixed; the blast radius is narrower than an unqualified reading suggests.
The ref is also the operator's own argv, so there is no privilege boundary here: this
is a footgun, not an escalation.
Item 1 was confirmed, but its exposure is 7 sites, not 2. One sub-claim was
partially refuted: Windows 11 stopped special-casing a device name carrying an
extension (
NUL.txt) or sitting as a non-root leaf (sub/CON) — though bareNULata leaf still resolves to the device there. We refuse the Windows 10 superset on every
platform deliberately: a config value must not mean different things by OS build.
Proof posture: which half is measured and which is cited
The git and POSIX halves of every premise are measured on this repo's suite. The
Win32 filesystem half is cited, not measured — this is a Linux box, CI's legs are
Linux, and nothing here calls a Win32 API. Sources were fetched on 2026-08-25 rather
than recalled: Microsoft "Naming Files, Paths, and Namespaces" (the reserved list, the
NUL.txtequivalence), Microsoft ".NET File path formats on Windows systems" (thetrim rule and the Windows 11 statement), Wine's ntdll path conformance tests
(
collapse_path,RtlIsDosDeviceName_U, and the per-case Windows 11 markers), andProject Zero's "The Definitive Guide on Win32 to NT Path Conversion" (2016, so the
pre-narrowing mechanism).
Two attribution corrections came out of that fetch and are worth recording:
page. That page states only a prohibition ("do not end a file or directory name with
a space or a period"). The stripping rule is cited to the .NET path-format page,
Project Zero, and Wine's
collapse_path._RESERVED_BASENAMESis a deliberate superset of Microsoft's published list,which names only
COM1-COM9/LPT1-LPT9and omitsCONIN$/CONOUT$entirely.Wine matches the console pair and rejects the
0forms, soCOM0/LPT0are backedby neither authority. The set's own comment at
platform_util.py:58-59claiming theyare "reserved by the same rule" is wrong; it was left untouched as out of scope and
the new docstring states the truth instead.
Compatibility break — the next release is a MINOR
Config that previously loaded now raises
PolicyError/ProfileError/ a manifesterror. This is a refusal rather than a warning by design: the value means one thing on
this platform and another on Windows, and a run that quietly seeds a different file
than the one configured is exactly the failure the guard exists to prevent.
The refusal is cross-platform, matching how the family already rejects
C:\secretson POSIX for determinism rather than for reachability.
Blast radius, audited rather than assumed: no shipped profile, bundled
plugin.toml,or
data/settings/core.tomldefault trips the new refusal — 459 pre-existingpolicy/profile tests and 122 plugin-loader/Unity tests passed untouched across phases 2
and 3, and no existing test or fixture needed changing anywhere in the program. All
seven production call sites of
delete_run/archive_run(cli.py ×4, runsetup.py,tui/app.py ×2) build
run_dirfrom the sameprojectthey pass, so none is newlyrefused.
One deliberate over-refusal: the gate refuses
com0/lpt0, which Win32 does notreserve. That is inherited from
_RESERVED_BASENAMESbeing a superset, not chosenhere, and
runs.is_valid_run_idhas behaved identically since it adopted the samesafe_segmentidiom — it is the family's existing posture.This PR does not bump the version.
scripts/sync_version.pyowns version stringsand the bump is a separate release PR. Per the bump-intent rule, a compatibility break
on previously-accepted config makes the next release a minor, not a patch. The
CHANGELOG entries land under
## [Unreleased].#637 — both
validate_triagepaths are gatedvalidate_triagegates bundle names in two places, and phase 5's trace found thesecond one. Phase 5 landed the
bundlesloop (sweep.py:211); this phase lands thedecision-option
bundle_namebeside it, which was validated againstBUNDLE_NAME_REonly. That value is not inert: a build-effect option's
bundle_namebecomesBundle.namein_materialize_bundles, which feeds_run_bundle→dirname→_write_intent— the same cycle-1 directory, by the same mechanism.The test at both sites is
safe_segmentidentity rather than a hand-written devicelist, which keeps the accepted set in lockstep with the sanitizer that defines it —
the identical idiom, for the identical reason, as
runs.is_valid_run_id.Bounds were re-measured against the real
safe_segmentrather than trusted: anexhaustive sweep of every
BUNDLE_NAME_RE-legal name of length 2-4 fails identity onexactly the device-name families and nothing else, with no hyphen or digit
surprises. Cycle > 1 is unexposed — the directory is
c<cycle>-<name>, which no prefixleaves in the reserved set. Length cannot reach the gate: the regex caps a name at 40
and
MAX_SEGMENTis 120.The pre-answer residual, closed in review round 2
_materialize_bundlesalso honouredanswer["bundle_name"]supplied by an out-of-bandpre-answer, which reached
Bundle.namewithout passing throughvalidate_triageatall. This was first recorded here as residual work; codex's round-2 review flagged the
same lane independently, and it is now measured and gated:
_materialize_bundlesapplies the same two rules (
BUNDLE_NAME_RE+safe_segmentidentity) to theanswer-supplied name, by journaled discard rather than by error — the human's build
decision is the payload and the always-legal
decision-<id>fallback is what anunnamed answer gets anyway.
Item 4 ships as documentation, and one more claim was corrected on the way
Item 4's swap was not performed, for the reason above. What shipped instead:
recovery_flow._restore_attempt_owned_spec_bytes— the one genuinerefusal guard in the tree built on stdlib
is_absolute(), which is the categoryConfig-path guards: reserved device names, exclude-pattern rendering, and two lexical-check gaps #480 asserts does not exist. The question at that site is the platform's own: a
live path this process is about to
resolve(strict=True)and write through on thehost it is running on, which is the opposite of the "must stay inside the project"
question the family predicate is built for. The comment exists so the next
path-guard sweep does not "fix" it.
verify.resolve_spec_path, which had none, stating the rule its14 call sites follow.
repair write pairs it with
spec_within_roots; an observer does not". Audited acrossall 14 sites, that biconditional is false in both directions: two callers that
write nothing (the attempt-binding observations) do check, and two that write (the
post-dev board sync, the sweep bundle's ledger close) do not. The rule that actually
holds is positive-only and scoped to the spec: a caller that goes on to rewrite the
spec must pair this with
spec_within_rootsfirst. The two unpaired writers arenamed in the docstring with their reason — they write to a deterministic
orchestrator-owned target, so an out-of-tree spec steers what they write and never
where. A docstring asserting the original wording would have been contradicted by
sweep.pyon its first reading.On the tests
Every phase graded its guard with single-arm ablations —
cpbackup, one arm removedat a time, restored byte-identical with the md5 re-verified, and graded by named test
node outcome rather than by a pytest exit code. Across phases 1-5 that is 16 arms
producing disjoint red sets, which is the actual proof that each site is independently
guarded: one guard higher up would have reddened every row on any single deletion.
Two of those records are worth surfacing, because both are cases where the obvious
assertion could not fail:
DID NOT RAISE, which proves only that something raises. Moving the guard below itsshutil.rmtreeleaves the raise assertion green and reddens the canary assertionalone. That mutant pair is the only thing proving the guard sits above the removal
rather than after it — a containment test asserting only the raise would pass against
an implementation that destroys the directory first.
con,nul)passes
BUNDLE_NAME_RE, so it can only ever raise one error, with or without theBUNDLE_NAME_RE.matchguard. An error-count assertion over such names is greeneither way. The guard is observable only on an input failing both gates (
CON,nul.,aux.txt,lpt9), so those rows are what make the guard non-decorative bymeasurement. The same trap applies to the sibling gate this phase adds, and its
ablation is designed the same way.
The one non-disjoint red set is correct rather than a symptom: phase 3's
test_manifest_rejects_win32_alias_seed_pathsis parametrized on the field as wellas the value, and its ablation reddens all five rows in both the
seed_filesandseed_globsparametrizations together. That joint reddening is what proves one sharedhelper is the guard for both fields.
A third case landed in this phase, and it is the sharpest of the three:
is_absolute()term is subsumed on POSIX, and the measurement says so.Deleting
not spec_path.is_absolute()from the recovery-flow guard leaves the newtest green — on POSIX the
resolve(strict=True)fixed-point term below catchesevery relative spelling anyway, because a relative path never equals its own
resolve. The term is load-bearing on Windows only, so no test runnable on CI can
protect it from deletion; the comment is what has to, which is the whole reason it
was worth writing. Deleting the whole refusal reddens the test on its canary
(
assert not spec.parent.exists()) whilepytest.raisesstays green — thepost-mkdir recheck still fires, after
mkdirhas already run. Phase 4's lesson,reproduced exactly.
unity_seed_assets.pyis deployed into consumer projects, is stdlib-only (it cannotimport core), and is excluded from pyright — so its
_names_win32_aliasis a hand-writtenmirror with no automated drift guard. It was diffed against the core predicate
mechanically, not by eye (difflib over extracted blocks with comments and docstrings
stripped): the frozenset and
_is_reserved_basenameare identical member for member,and the predicate body differs only in the private name and the
str | Path→strsignature its three sibling clones already use. It is now pinned behaviorally on the
core predicate's own 31-row truth table plus a set-equality test, in the test file that
already drives that script by path.
Summary by CodeRabbit
Bug Fixes
Documentation