# CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

## Project: ChowBox (吃啥盲盒)

WeChat Mini Program for solving "what to eat" decisions. Three modes:
- **Takeout Box (外卖盲盒)**: Random nearby quality delivery recommendation, jump to Meituan/Ele.me to order.
- **Fridge Box (冰箱盲盒)**: Input ingredients, get recipe matches ranked by match %, highlight missing items.
- **Explore Box (探店盲盒)**: Random nearby dine-in restaurant discovery, navigate via map apps.

**Status**: Pre-development planning. Zero code written. Docs in `doc/` are the source of truth.

### Tech Stack
- **Frontend**: Native WeChat Mini Program (WXML + WXSS + JavaScript), WeChat Developer Tools
- **Backend**: Java 8 + Spring Boot 2.x (classic MVC)
- **Database**: MySQL 5.7+ (primary) + Redis (cache)
- **External APIs**: Amap Web API (POI search, primary), Tencent Location Service (backup), WeChat Open APIs (navigation, subscribe messages)

### Design Tokens
- Primary: `#FF6A3D` (orange), Background: `#FFFBF4` (warm white), Text: `#333`, Accent: `#4CAF50`
- Card border-radius: 16px, Button border-radius: 24px
- Font: WeChat default Chinese font, bold titles at 16-20px

### Architecture
- Bottom tab navigation: Home (盲盒大厅), Records (记录), My (我的)
- Data flow: user location → backend → map POI API (cached by geo-grid + time) → filtering/weighting → weighted random selection → result
- POI cache: 1h client-side, 6h server-side for hot zones
- Box opening animation: 1.8-2.2s, 3-act (shake → lid open with glow → card reveal), Lottie + CSS keyframes, degrade to CSS-only on low-end devices (see `doc/box.md`)

### Key Docs
- `doc/plan.md` — Full product plan v1.0 (features, architecture, roadmap, budget)
- `doc/box.md` — Opening animation storyboard and dev parameters
- `doc/ui.md` — ASCII wireframes for all 6 core pages

### Roadmap
- **Phase 1 (MVP, 4-6 weeks)**: Scaffold mini program + Spring Boot backend, MySQL schema, Amap POI integration for takeout box, 100 recipes, basic box animation
- **Phase 2 (3-4 weeks)**: Explore box, voice ingredient input, user feedback weighting, 500+ recipes
- **Phase 3 (2-3 weeks)**: User preferences, share cards, subscribe messages, perf optimization
- **Phase 4**: Testing, WeChat review submission, iteration

No build/lint/test commands exist yet.

---

## Behavioral Guidelines

**Tradeoff:** These guidelines bias toward caution over speed. For trivial tasks, use judgment.

## 1. Think Before Coding

**Don't assume. Don't hide confusion. Surface tradeoffs.**

Before implementing:
- State your assumptions explicitly. If uncertain, ask.
- If multiple interpretations exist, present them - don't pick silently.
- If a simpler approach exists, say so. Push back when warranted.
- If something is unclear, stop. Name what's confusing. Ask.

## 2. Simplicity First

**Minimum code that solves the problem. Nothing speculative.**

- No features beyond what was asked.
- No abstractions for single-use code.
- No "flexibility" or "configurability" that wasn't requested.
- No error handling for impossible scenarios.
- If you write 200 lines and it could be 50, rewrite it.

Ask yourself: "Would a senior engineer say this is overcomplicated?" If yes, simplify.

## 3. Surgical Changes

**Touch only what you must. Clean up only your own mess.**

When editing existing code:
- Don't "improve" adjacent code, comments, or formatting.
- Don't refactor things that aren't broken.
- Match existing style, even if you'd do it differently.
- If you notice unrelated dead code, mention it - don't delete it.

When your changes create orphans:
- Remove imports/variables/functions that YOUR changes made unused.
- Don't remove pre-existing dead code unless asked.

The test: Every changed line should trace directly to the user's request.

## 4. Goal-Driven Execution

**Define success criteria. Loop until verified.**

Transform tasks into verifiable goals:
- "Add validation" → "Write tests for invalid inputs, then make them pass"
- "Fix the bug" → "Write a test that reproduces it, then make it pass"
- "Refactor X" → "Ensure tests pass before and after"

For multi-step tasks, state a brief plan:
```
1. [Step] → verify: [check]
2. [Step] → verify: [check]
3. [Step] → verify: [check]
```

Strong success criteria let you loop independently. Weak criteria ("make it work") require constant clarification.

---

**These guidelines are working if:** fewer unnecessary changes in diffs, fewer rewrites due to overcomplication, and clarifying questions come before implementation rather than after mistakes.