The repo's last unverified surface gets a gate. A decoded-RGBA golden
comparator (dimensions first, then raw pixels — never encoded PNG bytes,
proven by a re-encode-invariance test) with three-artifact failure output
and a reviewed-bless mechanism; four golden states over the real Engraver —
as opened, after a scripted pencil insert (target derived through the
session's own inverses, pitch/beat value-asserted exactly), after undo
(asserted equal to the as-opened baseline byte-for-byte, bypassing the
bless path so a broken undo can never bless itself green), and the slurred
casting-off fixture (system count value-asserted). Every state renders
twice and must match itself. Three user-reviewed baselines; rasterize()
split into a pixmap core so the goldens lock the exact surface the GUI
displays; one additive CI step uploads failure artifacts; DECISIONS.md
records the calls, including two engraving gaps locked knowingly (no clef
restatement on later systems; uneven system spacing).
Seven mutations executed and independently re-verified by the coordinator;
full gate green (fmt, clippy 0, workspace 0 failed, docs, conformance 8/8,
requirement counts unchanged).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Levi Neuwirth
6be14d2122