docs(ci): document automated GitHub Actions validation and add drawio verifier step

.github/workflows/ci.yml

@@ -26,5 +26,9 @@ jobs:
       - name: Verify sequence OAuth specs
         run: python scripts/verify-sequence-oauth.py
 
+      - name: Verify draw.io import script
+        run: python scripts/verify-drawio-import.py
+
       - name: Verify icon build script
         run: python scripts/build-icons.py
+

README.md

@@ -340,6 +340,8 @@ If you touch the draw.io import path, `python3 scripts/verify-drawio-import.py`
 it drives the real extractor against `scripts/fixtures/sample-architecture.drawio` in all four
 container formats and checks the references stay in sync.
 
+All pull requests and pushes are automatically validated via GitHub Actions CI (`.github/workflows/ci.yml`).
+
 ### What loads when
 
 At startup, the agent sees only the skill name and description. When a request matches, it loads `SKILL.md`; type references are pulled in only when relevant. This keeps the skill fast even with 36 reference files.