13 static-invariant tests pinning the four ordered pre-check branches in
retro/SKILL.md.tmpl:Step 0.5:
A. no-remote skip — must check origin presence + set verdict
B. detached-HEAD skip — must gate behind prior verdict (ordering)
C. fetch-fail warn — must match `if !` or `||` shape, gate by verdict
D. stale-base BLOCK — must read latest-commit ISO date, cite remediation
Plus a disclosure-survives-to-narrative invariant: skip-path verdicts must be
named in prose so the retro output carries the cited reason rather than
silently misreporting.
Failing build if Step 0.5 is removed, branches re-ordered (no-remote no longer
wins), or the BLOCK message stops citing today/latest-commit/remediation
path.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Garry Tan