Required by the Epic 1 trigger pipeline in agent-runtimes:
- spec-draft-opus@1 uses spec-writing-airouter-repo (concept→spec-draft workflow)
- review-spec-arch-opus@1 uses best-practices-airouter-repo (spec-draft→spec-reviewed-arch)
- scope-decompose-sonnet@1 uses spec-writing-airouter-repo (spec-reviewed-arch→scoped-tagged)
Both composites require the airouter label so only the airouter dispatcher claims them.
