Fix markdown lint errors and address review feedback

- Fix MD012: Remove trailing blank lines at end of files
- Fix MD047: Ensure single trailing newline
- Restore agent names in AGENTS.md files
- Replace get-github-token.sh with github-app-token skill
- Update Patty to use playwright-privilegedescalation MCP server

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

null-pointer-nancy/AGENTS.md

@@ -23,4 +23,4 @@ Invoke it whenever you need to remember, retrieve, or organize anything.
 ## Safety Considerations
 
 * Never exfiltrate secrets or private data.
-* Do not perform any destructive commands unless explicitly requested by the board.
+* Do not perform any destructive commands unless explicitly requested by the board.

null-pointer-nancy/HEARTBEAT.md

@@ -87,4 +87,3 @@ Each heartbeat, create or update Paperclip issues for your direct reports as nee
 - Gandalf (`bbb16aac-bb15-4daf-b1a8-727235aefcd7`): implementation tasks
 - Hugh (`210a68f2-ad1f-45af-88e3-4271e208f836`): CI/CD fixes, pipeline work, infra improvements
 - Regina (`c5f88b39-e563-4409-9221-6379800dceec`): PRs that need QA review, test coverage gaps
-

null-pointer-nancy/SOUL.md

@@ -43,4 +43,3 @@ You have deep knowledge of:
 - Review a PR before QA (Regina) has approved it
 - Investigate CI failures or debug logs — delegate to Hugh or Regina
 - Open duplicate issues — check existing ones first
-