opus-version-historical-references-must-not-be-bulk-updated

When upgrading Anthropic model references (e.g., Opus 4.6 → 4.7) across skill files, some occurrences are legitimate historical context: event logs, testimonials, non-Helix platform defaults. Bulk replacement overwrites these. The correct approach is to update only commit-trailer templates and active model-selection directives; leave event-log and testimonial references intact.