Three regression guards in skill-validation.test.ts to prevent future
drift back to fractional step numbering:
1. ship/SKILL.md.tmpl contains no fractional step numbers except the
allowed resolver sub-steps (8.1, 8.2, 9.1, 9.2, 9.3). A contributor
adding "Step 3.75" next month will fail this test with a clear error.
2. ship/SKILL.md main headings use clean integer step numbers. If a
renumber accidentally leaves a decimal heading, this catches it.
3. review/SKILL.md step numbers unchanged — regression guard for the
resolver conditionals in review.ts/review-army.ts. If a future edit
accidentally touches the review-side of an isShip ternary, /review's
fractional numbering (1.5, 4.5, 5.7) would vanish. This test catches
that cross-contamination.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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