## Your Task

1. Read the full app PRD at `prd-main.md` (in the same directory as this file)
2. Read the PRD at `prd.json` (in the same directory as this file)
3. Read the progress log at `progress.txt` (check Codebase Patterns section first)
4. **DO YOUR JOB**
5. Update the PRD to set `passes: true` for the completed story
6. Append your progress to `progress.txt`

## Progress Report Format

APPEND to progress.txt (never replace, always append):
```
## [Date/Time] - [Story ID]
- What was implemented
- Files changed
- **Learnings for future iterations:**
  - Patterns discovered (e.g., "this codebase uses X for Y")
  - Gotchas encountered (e.g., "don't forget to update Z when changing W")
  - Useful context (e.g., "the evaluation panel is in component X")
---
```

## USER REQUEST
{
  "id": "US-017",
  "title": "Fluid Curtain pull-down animation",
  "description": "As a user, I want to pull down from the top of any view to slide the app panel off-screen and reveal the AI chat layer beneath.",
  "acceptanceCriteria": [
    "framer-motion useMotionValue + useSpring (stiffness: 300, damping: 30) controls a 'y' CSS transform on the main app panel wrapper",
    "Trigger 1: wheel event listener at document level — when the current route's scroll position is at 0 and deltaY < 0 (overscroll up), animate panel y from 0 to viewport height",
    "Trigger 2: Cmd/Ctrl+K keyboard shortcut toggles curtain open (y = viewport height) and closed (y = 0)",
    "AI chat view is rendered as a fixed full-screen layer behind the sliding panel and becomes fully visible when panel slides down",
    "App panel remains mounted during animation (no unmount/remount, no state loss)",
    "Returning from chat: wheel event with deltaY > 0 at chat-bottom OR Cmd/Ctrl+K slides panel back to y = 0",
    "Right-edge vertical 'keep scrolling for AI' label with chevron-down is visible in every section (non-interactive, visual hint only)",
    "Typecheck passes",
    "Verify in browser using dev-browser skill"
  ],
  "priority": 17,
  "passes": false,
  "notes": ""
}