Ban Backup and Version-Suffix Files Across All Repos

taskdone

Enforce the docs-doctrine rule that .bak, .old, .tmp, _v2, _final, _new files are forbidden. VCS history is the only acceptable backup mechanism.

Acceptance Criteria

  • [ ] Scan all repos for files matching banned patterns (.bak, .old, .tmp, _v2, _final, _new, _copy)
  • [ ] Delete or properly rename every violation found
  • [ ] Add a .gitignore pattern to reject future violations
  • [ ] Document the ban in CLAUDE.md or contributing guidelines
  • [ ] Verify zero violations remain via automated scan