Source: task/album-cue-lower-run-converge (plan/steward-linker-design) — the 16d8f74 LOWER_RUN both leaked lowercase prose and truncated digit-led titles; this converges the precision/recall balance.
- Weak cue (album|record|ep|lp): admit a capital/digit-led run OR a SINGLE lowercase token only (LOWER_ONE, guarded by a negative lookahead so a second lowercase word reads as prose and is rejected) — closes the 'makes me cry' / 'changed everything' prose leak.
- Strong cue (called|titled|named): the ONLY place a multi-word lowercase run (LOWER_RUN) is admitted — 'an album called good kid maad city' → 'good kid maad city'.
- New DIGIT_RUN (digit lead absorbs trailing lowercase tokens, bounded 1-4 words, tried before TITLE_RUN) fixes the digit truncation — '36 chambers'/'1989 deluxe'/'808s and heartbreak' capture in full.
- Position-mapping invariant enforced in the album push helper; bounded regexes (ReDoS test on a multi-KB pathological input); comprehensive BOTH-direction tests (precision: non-stop-set lowercase leads emit nothing; recall: digit continuation, single token, strong cue).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
