Adds self-review check #6 to brainstorm Step 7: when the profile
declares `spec_validation.parsers`, every fenced spec block whose
fence label has an entry is written to a temp file (entry `ext`) and
run through the entry `cmd` ({file} substituted); non-zero exit is a
self-review failure that must be fixed before the spec proceeds. The
parse-trace goes into the brainstorm chat as the attestation the gate
fired. Labels with no entry are skipped-and-documented; a malformed
entry surfaces as a profile error; no `spec_validation` -> no-op.
Placed in Step 7 (not Step 4 as the issue's prose suggested) because
the spec file — and thus its code blocks — exists only after Step 6;
Step 7 also already re-runs on post-PASS edits, so a changed block
re-triggers the gate for free.
Also adds a Common Rationalisation ("it obviously parses") and a Red
Flag (configured parser, no trace in chat).
refs #1
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Brummel
e1d33369f5