Apply review suggestions to the real-files block in
ai-agent-roles-catalog.provider.spec.ts (test-only):
1. Fix inaccurate comment: there are 5 content YAML files (index +
four per-bundle/lang files), not 6.
2. Improve isolation: read/parse the real index lazily inside tests
(via loadRealIndex) instead of in the describe body, so a broken
real file fails only these catalog tests, not collection of the
whole spec (incl. the unrelated mocked-remote provider tests).
3. Add the symmetric slug check: each language file's slug set must
equal the declared slug set (no undeclared/extra roles), matching
scripts/check.mjs's exact two-way correspondence.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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