Update Library Documentation

Update documentation in .claude/docs/libraries/ with latest information.

Steps

1. Inventory Library Docs

Run lib_inventory.py instead of eyeballing the directory — it scans each doc's > **Last Updated** / > **Version Checked** metadata, resolves the version the project declares and locks, and cross-checks declared dependencies:

python3 .claude/skills/update-lib-docs/lib_inventory.py \
  [--stale-days N] [--today YYYY-MM-DD] [--library NAME] [--project-root DIR]

Emits {ok, libraries_dir, stale_days, today, library, libraries, counts, missing_metadata, undocumented, declared_dependencies, dependencies, sources, manifest_errors, warnings, artifacts}.

Field	Meaning
libraries[]	file, name, last_updated, version_checked, age_days, stale, stale_reasons, has_metadata, read_error, declared_spec, declared_in, locked_version, locked_in, ecosystem, version_drift, version_drift_basis, version_drift_note
counts	total, stale, missing_metadata, read_errors, version_drift, drift_unknown
missing_metadata	Doc filenames with no Last Updated / Version Checked blockquote — invisible to staleness until fixed
undocumented	Declared dependencies with no doc file at all
dependencies	Version resolution per package: declared_spec + locked_version and where each came from
sources	Every dependency table actually parsed: file, table, ecosystem, kind (manifest/lock), dependency_count
manifest_errors	{file, error} for a manifest or lockfile that failed to parse
warnings	e.g. a manifest with no readable dependency table, or no lockfile found

stale is the OR of two signals, and stale_reasons says which fired:

• age — age_days > --stale-days (default 90).
• version_drift — version_checked disagrees with locked_version, with a pinned declared_spec, or falls below the spec's lower bound. version_drift is true/false only when the comparison is decidable; null plus version_drift_note means it is not (no lockfile behind an open range, a non-numeric version). null is not "clean" — read the note.

Exit codes: 0 ok, 1 bad argument (--today not YYYY-MM-DD, --library not a package name, --project-root missing), 2 a manifest or lockfile could not be parsed, 3 a library doc could not be read. If ok is false, stop and report the manifest_errors / read_error entries — an empty scope from a broken manifest is not success.

This run's scope is the union of three lists from that output: entries with stale: true, every doc in missing_metadata, and every name in undocumented. Everything else is already current — skip it.

2. Web Search for Latest Info

For each library in scope, search for:

• Breaking changes
• Deprecated features
• New features
• Security updates
• Newer upstream releases (an upgrade consideration, not the version recorded in the doc — > **Version Checked**: is the version this project uses, which the inventory already resolved)

3. Update Documents

Derive each doc path from the same authority research-lib uses, so an update and a creation can never disagree about the filename:

python3 .claude/skills/_shared/workspace.py --skill research-lib \
  --title "{library}" --create

Then, for each stale library, update paths.lib_doc; for each undocumented dependency, create it following the same template (see research-lib's documentation template for the full section layout):

1. Update > **Version Checked**: to the inventory's locked_version (or the version satisfying declared_spec when nothing is locked)
2. Update > **Last Updated**: to today
3. Add new features/constraints
4. Mark deprecated APIs
5. Update code examples if needed

4. Validate Updated Documents

After updating or creating a doc, validate it against the lib-doc contract:

python3 .claude/skills/_shared/validate_doc.py --contract lib-doc \
  --file <paths.lib_doc>

Exit 0 means the four required ## sections (Overview, Core Features, Constraints & Notes, References) and the Last Updated / Version Checked metadata lines are all present. Exit 1 means the file does not exist or could not be read (there is no sections_missing on that path — check the path before editing anything). Exit 2 means the doc violates the contract: sections_missing lists absent sections, metadata_missing lists absent metadata lines. Fill both in; do not report the update as complete with either non-empty.

Re-running step 1 is the completion check: a doc you updated must no longer appear in stale, missing_metadata, or undocumented.

5. Check Impact on Code

After updating docs, verify:

• Using any deprecated APIs?
• Any breaking change impacts?
• Need to update project dependencies?

Editing a manifest or source file is outside this skill's documentation scope. If step 5 leads to any change outside .claude/docs/libraries/, run the gates before reporting:

bash .claude/skills/_shared/verify.sh

Exit 0 means the gates passed; exit 2 means a gate failed or no gates ran. Do not report completion on a non-zero exit.

Key Items to Check

Category	What to Look For
Security	CVEs, security patches
Breaking	API changes, removed features
Deprecated	APIs marked for removal
Performance	Optimization improvements
New Features	Useful additions

Update Format

There is one library-doc template, in research-lib/SKILL.md under ## Documentation Template, and it is the version pinned by tests/test_validate_doc.py against the lib-doc contract. Do not keep a second copy here: a template that no test pins is how the two skills came to disagree about the metadata block in the first place.

An update edits the existing document in place:

• Refresh the > **Last Updated** / > **Version Checked** blockquote that already sits directly under the H1 — it is the only place a version lives, so do not add a second version line anywhere.
• Optionally add a ## Recent Changes list after the blockquote; it is not a contract section, so keep the four required sections intact.

Report

After updating, report to the user per .claude/rules/language.md:

• Which libraries were updated
• Significant changes found
• Any action items for the project