Fix: Restore unified Topics folder and reorganize specialized category folders

10_Wiki/Topics/2026-05-02_second-brain-trace-collapsible-ui.md

@@ -0,0 +1,30 @@
+---
+id: P-REINFORCE-WIKI-EC4DA38B
+category: Dev
+confidence_score: 0.95
+tags: ['architecture-principles']
+last_reinforced: 2026-05-02
+---
+
+# Development Log: Second Brain Trace Collapsible UI
+
+## Purpose
+Reduce visual noise from Second Brain Trace details while keeping the evidence available when the user wants to inspect it.
+
+## Implementation Summary
+- Wrapped Second Brain Trace output in a collapsed HTML `<details>` block.
+- Added a compact summary line showing usage status and note counts.
+- Kept detailed referenced notes, unused notes, grounding metrics, and debug JSON inside the expanded section.
+- Updated tests to verify the collapsible structure is rendered.
+
+## Changed Files
+- `src/features/secondBrainTrace.ts`
+- `tests/secondBrainTrace.test.ts`
+
+## Verification
+- `./node_modules/.bin/tsc --noEmit`
+- `npm run compile`
+- `./node_modules/.bin/jest --runInBand`
+
+## Result
+Trace evidence is still available, but it no longer dominates every answer by default.