Verifies the TOC is current without writing: exit 0 (up to date), 1 (stale),
2 (no markers). Documented in README. Tested across all three exit states.

- Detects relative file links pointing at missing paths
- Validates #anchors (same-file and cross-file) using GitHub's slug algorithm
- Ignores links in fenced code blocks and inline code spans
- Network-free by default; --external lists URLs without fetching
- CI-friendly exit codes (0 ok / 1 broken / 2 usage); --json output
- Documented in README with usage and feature list

…hecks

Concrete copy-paste artifacts wiring link-check.js (and opt-in markdown-toc.js
--check) into CI and git hooks. Tested on this repo. README section + note on
the marker false-positive caveat.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YC1umQHkdcQLWnoF5GKE45

Zero-dependency, network-free Node linter for the --- frontmatter block:
required-key checks, YYYY-MM-DD date validation, boolean/list type checks,
duplicate-key and unterminated-block detection. Supports --dir recursion,
--json, --quiet, and CI exit codes (0/1/2). Practical YAML subset parser
(scalars, quoted strings, flow + block lists, booleans, numbers). Tested
against the blog-drafts repo plus crafted bad-input fixtures. README section
6 + TOC added; all links verified.

…, skipped levels)

…dep, --write/--check

…nguage, mismatched)

…text (a11y + SEO)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01EsnAGky7CwiknXv6K84UnU

Was link-check only. Now runs the whole suite: link-check, code-fence-lint,
image-alt-lint, and frontmatter-lint (--allow-missing) ON by default (defect-only,
CI-safe); heading-lint and table-fmt --check opt-in (they flag deliberate style,
not bugs); markdown-toc stays opt-in via TOC_FILES. Each check toggleable via
CHECK_* env vars. Tested: default passes on this repo, strict (CHECK_HEADINGS=1
CHECK_TABLES=1) fails on the intentional duplicate sub-headings + unaligned table,
toggles work. Updated README + docs-check.yml to match.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NdojMF6h7vP4khiEFhWwB1

Flags mixed bullet markers within one list (MD004), broken ordered
numbering that's neither all-1. nor a clean increment (MD029), and
odd-space list indentation (MD005/MD007, a non-failing warning). Tracks
and skips fenced code; scopes marker checks to a single list block so
separate lists using different markers are never cross-flagged. --json,
--quiet, per-rule toggles, --strict-indent; CI exit codes; require()able
via lintText. Tested on fixtures (each rule), false-positive guards, and
the repo's own docs. Wired into examples/check-docs.sh (ON by default,
CHECK_LISTS toggle) and documented as README section 11.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013kxtY7Uxk9sJZFdxU7ucAt

Lints commit messages against Conventional Commits: header grammar, type enum,
blank-line separator (errors) plus subject/body length and style (warnings).
Three input modes (message file, --stdin, --range A..B), hook-ready (strips git
cruft, skips merge autos), --json/--quiet, require()-able lintMessage/stripGitCruft.
Adds examples/git-commit-msg hook and README section 12 with a dogfood note.
Tested across 16 cases incl. FP guards; existing doc suite still clean.

Zero-dep Node linter — version-heading format, SemVer, ISO dates, change-group
names, duplicate/ordering/empty checks. Fenced-code aware, --json/--strict/require().
Wired into check-docs.sh as an auto-on per-file check when a CHANGELOG exists.
README section 13.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VteDDVmV9aL5p8kSqdCxeC

The hygiene companion to the content lint family. Flags trailing whitespace
(MD009), hard tabs in indentation (MD010), CRLF/bare-CR line endings, a
missing/duplicated final newline, and over-long blank runs (MD012) — the
invisible diff noise the content linters ignore. Every rule is mechanical,
so --fix repairs all of them idempotently. Fenced-code aware; allows the
2-space Markdown hard break by default; works on any text file, not just MD.

Wired into examples/check-docs.sh as a default-ON, defect-only check and
documented as README section 14. Tested against crafted inputs: lint output,
exit codes 0/1/2, --fix byte-correctness, idempotency, CRLF, --no-md-breaks;
dogfooded clean on the repo's own docs.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017xACmT2TJTBxXtDgx1jpfK

Wired into check-docs.sh as a default-on defect-only check (empty/whitespace
link text fail; non-descriptive and raw-URL text warn). README section 15 + ToC.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012fBd8EPMktgYBViLUd7H3s

Scans the working tree for hardcoded credentials using prefix-anchored patterns
(AWS AKIA, GitHub ghp_/github_pat_, Slack tokens+webhooks, Google AIza, Stripe
sk_live, npm_, private-key blocks) reported as errors, plus lower-confidence JWT
and generic high-entropy assignment rules as warnings. Shannon-entropy + placeholder
filtering keeps false positives down (AKIAIOSFODNN7EXAMPLE and ${VAR} don't fire);
findings are redacted so the report never leaks the secret. Flags: --strict/--json/
--quiet; exit 0/1/2. Adds examples/git-pre-commit-secrets hook and README section 16.

Verified: 9 crafted positives flagged, 6 negatives excluded, all exit codes, dogfooded
clean on the repo (23 files). Patterns cross-checked against gitleaks' default ruleset.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015E3hofptrivNd5nE786hcM

…MD052/MD053)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01J8EFkg8nwgpKwbsJbxh9oz

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_013jMykKQfZSz6PncZJDE96c

…eading (MD036)

Catches the fake headings heading-lint.js can't see — a bold paragraph that
renders like a section title but produces no anchor, no TOC entry, no
screen-reader stop. Fence-aware; skips list items, blockquotes, table rows,
and emphasis ending in sentence punctuation. Wired into check-docs.sh (ON by
default) and documented in the README. 21 scripts.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Wr9aHqQKdXspWsHxdEtP8j