Adds the harness that the v2_PLAN.md cathedral parity-eval suite is built
on. Compares CURRENT SKILL.md output to v1.44.1 baseline along three axes:
STRUCTURE frontmatter shape (catalog trim landed, "## When to invoke" present)
CONTENT must-preserve phrases per skill family (cso: OWASP/STRIDE;
plan-ceo: SCOPE EXPANSION/HOLD SCOPE/REDUCTION; ship:
VERSION/CHANGELOG/PR; etc.)
SIZE per-skill byte budget (maxSizeRatio + minBytes guards)
PARITY_INVARIANTS registry pins 10 load-bearing skills (cso, ship, plan-*-
review, review, qa, investigate, office-hours, autoplan). Each entry
declares what must NOT regress; future compression that strips these
phrases or shrinks a skill past its minBytes cliff fails CI.
Periodic-tier LLM-judge parity (paid, ~$0.20/skill) lands in v2.0.0.0
sections/ phase. Same registry, same harness, judge added on top.
Test plan:
- bun test test/parity-suite.test.ts: 10/10 invariants pass vs v1.44.1
- Per-skill failures get actionable per-line breakdown so a reviewer can
see which phrase / heading / size limit went sideways
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Garry Tan