chore: add PR template and update workflow

Add .github/pull_request_template.md based on knative
upstream format. Update feature development sequence to
include PR creation step.

Co-Authored-By: Claude <noreply@anthropic.com>

Author: twoGiants

.github/pull_request_template.md

@@ -0,0 +1,20 @@
+# Changes
+
+<!--
+Describe your changes here.
+
+- :gift: Add new feature
+- :bug: Fix bug
+- :broom: Update or clean up current behavior
+- :wastebasket: Remove feature or internal logic
+-->
+
+-
+-
+-
+
+<!--
+Optional: link an issue.
+Usage: `Fixes #<issue number>`, or `Relates to #<issue number>`.
+If no issue exists, include the 'why' behind your changes above.
+-->

AGENTS.md

@@ -50,8 +50,9 @@ After [Startup Sequence](#startup-sequence), work through the picked feature:
 4. **Review** — code review using `/requesting-code-review` skill, fix found issues
 5. **Manual Test** — use browser automation and validate it works in the browser
 6. **Complete** — flip `passes` to `true` in `docs/features.json`, update `docs/claude-progress.txt`, commit
-7. Move plan to `docs/plans/completed/`
-8. Stop, wait for user command
+7. **PR** — push branch, open PR via `gh pr create` using `.github/pull_request_template.md`
+8. Move plan to `docs/plans/completed/`
+9. Stop, wait for user command
 
 ## Session Rules