CI & Build / Python lint (push) Successful in 2s
CI & Build / Plugin hooks (push) Successful in 13s
CI & Build / TypeScript typecheck (push) Successful in 53s
CI & Build / integration (push) Successful in 56s
CI & Build / Python tests (push) Successful in 1m31s
CI & Build / Build & push image (push) Successful in 14s
In a repo where 3,000 files define `slug`, scribe_local_dups printed nothing; with 3 files it printed the duplicate line. Every hook runs under `set -uo pipefail`, and `hits=$(git grep -l … | head -4) || hits=""` lost head's four lines whenever git grep was still writing when head exited. That is a SIGPIPE, the substitution fails, and the outer fallback wipes the result. So the by-name duplicate arm went silent for exactly the most-duplicated names. Found while fixing the same trap in the new Stop hook (#4041). - The fallback moves inside the substitution, `$(… | head -N || true)`, at all five sites: scribe_defs.sh (local dups), scribe_prior_art.sh (names, old_first, shapes) and scribe_after_write.sh (names). A real upstream failure still yields empty output. - check_plugin gains a known-bad pattern for the shape, so no hook can bring it back. - Tests: the real function against a 3,000-file repo (past the pipe buffer), and the pattern shown to flag the old shape and pass the fix. Plugin version minted. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>