feat: check duplicate roxygen documentation action (#864)

[dem-extra1]

Closes #864

WIP — opened up front to claim the issue; implementing now.

[dem-extra1]

Addressed all 4 review findings in commit 3a41edd:

1. \website/permissions.qmd\ (MD013 line length): Wrapped the \check-duplicate-roxygen\ entry onto a new line, keeping line lengths well under 80 characters.
2. \website/reference/check-duplicate-roxygen.qmd\ (MD013 line length): Wrapped the opt-out directive introductory line across two lines to stay under 80 characters.
3. \README.md\ (versioning enumeration): Added \check-duplicate-roxygen.yml\ to the ## Versioning\ section's list of capabilities that only ever shipped at @v2.
4. \website/versioning.qmd\ (unpinned @v2 actions): Added \check-duplicate-roxygen.yml\ (and synced \check-one-function-per-file.yml) to the ## Pinning third-party actions\ section's list of unpinned @v2\ actions.

Posted by Antigravity (AI agent) --- not written by a human.

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[github-actions]

Claude finished review — View run

---

Both prior-round findings are fully resolved:

1. lint-qmd CI failure — confirmed fixed. Ran the pinned markdownlint-cli2-equivalent tool (lint-qmd/run_lint_qmd.mjs, markdownlint 0.40.0, same version CI uses) against the two flagged files and the entire website/ .qmd tree: zero errors across all 55 files. website/permissions.qmd:14-15 and website/reference/check-duplicate-roxygen.qmd:12-13 are both rewrapped under 80 columns at clause boundaries, with no loss of meaning.

2. Missing @v2-only-capability list entries — confirmed fixed. README.md's main ## Versioning enumeration (line 618) and website/versioning.qmd's "not SHA-pinned" list (line 153) both now include `check-duplicate-roxygen.yml`. The fix also swept up the pre-existing, unrelated gap noted in the previous round (check-one-function-per-file.yml was missing from the same website/versioning.qmd list) — that capability is now present too, with no duplication.

I also re-verified this diff round didn't touch anything else (4 files, 8/6 lines, exactly matching the two fixes) and re-grepped the repo for any other @v2-only-capability enumeration site that might still be missing check-duplicate-roxygen; found none beyond the two closed in this round. The unrelated README.md:768 mention of check-code-similarity.yml/claude.yml/claude-code-review.yml is a different list (workflows that expose timeout-minutes as a workflow_call input) and doesn't apply to this capability.

No new issues found in this round's diff.

Verdict

Ready for merge — both blocking findings from the prior review round (comment, commit 3ea71449) are verified fixed: lint-qmd now passes cleanly (reproduced locally with the pinned tool version), and both missing @v2-only-capability list entries are filled in, including a pre-existing sibling gap that was cleaned up as a bonus. No new issues introduced by this round's changes.

Structured Review Data (JSON)

{
  "schema_version": "1.1",
  "reviewer": "claude",
  "commit_sha": "510cc700b626574ed63aacf6de443380637d1bea",
  "verdict": "CLEAN",
  "findings": [],
  "detailed_assessment": "Reproduced the pinned lint-qmd tool locally against website/permissions.qmd and website/reference/check-duplicate-roxygen.qmd plus the full website .qmd tree, confirming zero MD013 violations remain after the rewrap fix in commit 3a41edd.",
  "holistic_assessment": "Verified both versioning-doc enumeration sites (README.md Versioning section, website/versioning.qmd Pinning subsection) now list check-duplicate-roxygen.yml with no duplication, closing the doc-sync gap CLAUDE.md requires and satisfying prior review's CI and documentation-completeness requirements."
}

Reviewed commit: 3a41edd

[github-actions]

💰 Cost: $1.1616 (review) — run