Three doc changes for the bundle's discoverability:
1. New docs/contributor/ci-guards.md (185 lines)
Entry-point doc for new contributors. Explains the four categories
of guards (code-shape, contract-parity, build/dep, operational),
the discipline that keeps them honest (allowlist + expiration),
and how to add a new one. Cross-references scripts/ci-guards/README.md
for the exhaustive list.
2. scripts/ci-guards/README.md — added a 'Forward-looking guards'
subsection naming complete-path-config-coverage, doc-rot-detector,
and cold-db-compose-smoke with their item references + a
one-sentence description of what each catches. Replaced the
stale '22 guards' header with 'Count: re-derive via ls' per the
no-version-stamped-numbers convention from CLAUDE.md.
3. docs/README.md — wired ci-guards.md into the Contributor section
navigation table.
Bumped 'Last reviewed:' to 2026-05-12 on the two docs touched
(docs/README.md, docs/contributor/ci-pipeline.md).
Verified: doc-rot-detector.sh green at 91 docs scanned, 89 dated, 0
warns, 0 fails.
Audit-Closes: post-v2.1.0-anti-rot/item-1
Audit-Closes: post-v2.1.0-anti-rot/item-2
Audit-Closes: post-v2.1.0-anti-rot/item-5
Audit-Closes: post-v2.1.0-anti-rot/item-6
shankar0123