The GitHub Copilot CLI plugin reference requires plugin.json at the root of the plugin directory. BCQuality shipped it only under .claude-plugin/, which is tolerated by --plugin-dir but is non-canonical and can be rejected on the marketplace / 'plugin install owner/repo' path.
Mirror the proven microsoft/BC-ALAgents al-review plugin layout: move plugin.json to the repo (plugin) root and add an explicit skills array plus repository/license/keywords metadata to both plugin.json and marketplace.json. The skills array pins the one real skill (skills/bcquality-al-review/), avoiding ambiguity with the loose meta .md files in skills/.
Verified: 'copilot --plugin-dir <clone>' still loads the bcquality plugin and the bcquality-al-review skill registers at runtime, identical to before.
* Package BCQuality as an installable plugin (experiment)
Adds a marketplace + plugin manifest and a bridge review skill that drives the existing Entry protocol from a plugin host. No changes to knowledge or routing logic.
* Bridge skill: make enabled-layers configurable; note layer-pruning limit and manifest choice
Addresses PR #84 review (JesperSchulz): #2 layer policy has no hook in the plugin path -> expose BCQUALITY_ENABLED_LAYERS and document that it narrows discovery only, not a hard deny; #3 document the .claude-plugin manifest choice (verified on Copilot CLI).
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Co-authored-by: wenjiefan <wenjiefan@microsoft.com>
