diff --git a/.gemini/skills/mma-tier2-tech-lead/SKILL.md b/.gemini/skills/mma-tier2-tech-lead/SKILL.md
index 52c3f0a..2225465 100644
--- a/.gemini/skills/mma-tier2-tech-lead/SKILL.md
+++ b/.gemini/skills/mma-tier2-tech-lead/SKILL.md
@@ -21,6 +21,7 @@ When implementing tracks, consult these docs for threading, data flow, and modul
 - Maintain persistent context throughout a track's implementation phase (No Context Amnesia).
 - Review implementations and coordinate bug fixes via Tier 4 QA.
 - **CRITICAL: ATOMIC PER-TASK COMMITS**: You MUST commit your progress on a per-task basis. Immediately after a task is verified successfully, you must stage the changes, commit them, attach the git note summary, and update `plan.md` before moving to the next task. Do NOT batch multiple tasks into a single commit.
+- **Meta-Level Sanity Check**: After completing a track (or upon explicit request), perform a codebase sanity check. Run `uv run ruff check .` and `uv run mypy --explicit-package-bases .` to ensure Tier 3 Workers haven't degraded static analysis constraints. Identify broken simulation tests and append them to a tech debt track or fix them immediately.
 
 ## Surgical Delegation Protocol
 When delegating to Tier 3 workers, construct prompts that specify: