apm.yml only declares claude and codex marketplace output profiles --
codex writes a differently-shaped file to .agents/plugins/marketplace.json,
so nothing regenerates the legacy Copilot CLI path at
.github/plugin/marketplace.json. It was hand-synced once during the #90
conversion and had drifted (missing the category field added when codex
output was enabled) with no gate to catch it.
scripts/sync-marketplace-mirror.sh keeps it byte-identical to the compiled
.claude-plugin/marketplace.json, wired as a pre-push check so it can't go
stale silently again.
Refs: #90
Defame1297
a873e93050