agent-zero-fix-summary.prose.md has no YAML frontmatter (kind/name/description),
so CI validate fails on every master push that touches it (runs 226-228).
It is a dated session fix-log, not a contract - the durable knowledge already
lives in agent-zero-openrouter-key.prose.md (kind: function, referenced from
the summary). Rename to .md so validate/lint (which scan only *.prose.md)
stop rejecting master; matches repo root docs like cron-prompts-review.md.
Verified live: local validate repro PASS (36 files), prose-lint PASS at
baseline 15 warnings, no new warnings. Intentionally NOT changed: no content
edits, no other files, no contract frontmatter added to non-contract docs.
