Earlier commit naively wrote a `.github/agents/<id>.agent.md` for every
installed skill, which would clutter the Custom Agents picker with 90+
workflow/tool entries that don't belong there.
Adds an `agents-only` filter that gates the per-skill emission on whether
the canonical id signals a persona agent:
- Primary rule: id contains `-agent-` (e.g. `bmad-agent-pm`,
`gds-agent-game-dev`, `wds-agent-freya-ux`,
`bmad-cis-agent-storyteller`).
- Allowlist: `bmad-tea` — TEA's Murat persona uses the bare module code
rather than the `-agent-` convention. Listed explicitly so the rule
still surfaces it.
Verified against the full installed manifest (114 skills): catches all
20 description-confirmed personas across BMM, CIS, GDS, WDS, TEA;
excludes all 94 workflows/tools.
Wired through a new yaml field on github-copilot:
commands_filter: agents-only
OpenCode is unaffected — it has no `commands_filter` set, so the loop
behaves as before (every skill becomes a slash command).
Tests: extends Suite 17 with a multi-skill manifest fixture covering
persona/agent + bmad-tea + workflow cases; asserts persona agents and
bmad-tea get .agent.md files while workflows do not. 322 tests pass.
Refs #2267
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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