diff --git a/.mulch/expertise/seedpass.jsonl b/.mulch/expertise/seedpass.jsonl
index 91ae66b0..4540db29 100644
--- a/.mulch/expertise/seedpass.jsonl
+++ b/.mulch/expertise/seedpass.jsonl
@@ -8,3 +8,4 @@
 {"type":"decision","title":"Codex runtime model source","rationale":"In this environment Overstory v0.7.9 rejects bare gpt-* in config models:, while codex account mode rejects provider-prefixed openai/gpt-* names; the stable path is model mapping in agent-manifest.json.","classification":"tactical","recorded_at":"2026-03-03T21:05:28.553Z","id":"mx-bc6fbc"}
 {"type":"convention","content":"SeedPass swarm baseline targets canonical branch beta and quality gates should run with .venv/bin prepended to PATH for pytest -q and scripts/run_ci_tests.sh.","classification":"tactical","recorded_at":"2026-03-03T21:05:48.410Z","id":"mx-c35626"}
 {"type":"pattern","name":"tui-v3-grid-focus-and-query-state","description":"TUI v3 main grid keyboard scrolling depends on explicit focus ownership: focus #entry-data-table on MainScreen mount and restore focus there when closing the command palette. Persist active search query in app state so refresh/filter/sort changes do not silently clear results.","classification":"tactical","recorded_at":"2026-03-06T12:08:49.420Z","id":"mx-4f9056"}
+{"type":"pattern","name":"tui-v3-maintenance-css-conventions","description":"Maintenance screens share MAINTENANCE_CSS from maintenance.py. Use CSS (not DEFAULT_CSS) on Screen subclasses. Intro cards use round border style. Danger buttons use background #880000 / border #ff4444.","classification":"foundational","recorded_at":"2026-03-06T18:30:22.430Z","outcomes":[{"status":"success","agent":"builder-maint-polish"}],"id":"mx-470d93"}