# AI_NOTES — Stage 3: <title from plan>

## What was done
- <list of changes>

## Why this approach
- <rationale>

## Files created / modified
| File | Action | Description |
|---|---|---|
| `src/internal/llm_history/` | created | what and why |
| `tests/llm_history_test.go` | created | what and why |

## Risks and limitations
- <known issues>

## Invariant compliance
- [ ] <invariant> — respected / violated (explain)

## How to verify
1. <command or manual check>