chore: update PR 332 tooling for capability model

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,7 +2,7 @@
 Thanks for the PR! A few quick reminders before you hit submit:
 - DCO sign-off on every commit (git commit -s; --amend -s to fix)
 - Plugin work? Check docs/PLUGIN_AUTHORING.md and validate plugin.json
-  against schema/plugin.schema.json
+  against schema/plugin.schema.json, including capability metadata
 - Touching the highway / player UI? Add or update a Playwright test
   under tests/browser/
 -->
@@ -23,7 +23,7 @@ Thanks for the PR! A few quick reminders before you hit submit:
 - [ ] `npm run test:js` passes locally
 - [ ] `npm test` (Playwright) passes locally — *or* CI will run it
 - [ ] Verified in `docker compose up` (live-reload working directory)
-- [ ] Plugin manifest validates against `schema/plugin.schema.json`
+- [ ] Plugin manifest validates against `schema/plugin.schema.json` (legacy fields + capability metadata)
 - [ ] Not applicable — explain below
 
 ## Screenshots / recordings