PR 1 of 3 for issue #559 — docs and conventions, no behaviour change.
- New `docs/learnings/patching-minified-js.md` covering anchor
selection, identifier capture (`\w` vs `$`), beautified
false-negative trap, whitespace tolerance, replacement-string
escaping, idempotency, multi-site coordination, lastIndexOf
disambiguation, and the SHA-256-pinned hypothesis-verification
recipe.
- New `CONTRIBUTING.md` as a navigation hub: scope policy
(no net-new features outside Linux-environment parity), upstream
routing, subsystem owners, PR checklist, AI-assisted contribution
disclosure format, and the patch-script regex intent comment +
markdown wrapping conventions.
- Fix CLAUDE.md:126 example regex `\w+` → `[$\w]+` (same class of
bug the new learnings doc documents).
- CLAUDE.md learnings index entry for the new doc.
PRs 2 (`verify-cowork-patches.sh` + BATS) and 3 (silent-no-op
WARNING retrofits) follow.
Refs #559
Co-authored-by: Claude <claude@anthropic.com>
