---
id: P-REINFORCE-WIKI-EC4DA38B
category: Unified
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.

## 🔗 Knowledge Connections
### Related Concepts (Auto-Linked)
* [[Architecture]]
* [[Noise]]
* [[P-Reinforce]]
* [[Principles]]
* [[Purpose]]