The document is closed: no unique content remains — § D (pre-release
security review) is duplicated in progress.md, security.md and the
CHANGELOG, and B.1-B.3/C.4 were trimmed in 60addd5. It stays until the
tag only because it describes the release gate.
Record the retirement as a v1.x tail item in roadmap.md with the
concrete steps: archive the file and retarget its references, including
the stale "plan C.4" pointers in Makefile, release.yml and the e2e test.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
mix
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