# IMPLEMENTATION_REPORT — ECR-003

**Date:** 2026-08-06  
**Status:** Implemented  
**Change Level:** L2  

## What changed

| Area | Change |
|------|--------|
| Engine | 新建 `chanlun/analysis/wyckoff/`：交易区间、A–E 阶段、Spring/SOS/LPS/UTAD/SOW/LPSY、区间 VP（POC/VAH/VAL）、量能确认 |
| API | `/api/analyze` 按需 `include_wyckoff=1` 返回顶层 `wyckoff`；默认可不计算 |
| Contract | `analyze_contract_keys.json` 扩展为 required + optional_when |
| UI | 主站「威科夫」及子项开关；Lightweight 绘制区间/阶段/事件/VP |
| Tests | `tests/test_wyckoff.py`；契约 HTTP opt-in |

## Compatibility

- 缠论算法与 golden 基线未改
- `/api/analyze` 既有字段未删；`wyckoff` 仅 opt-in
- 未改 `config/` / `strategies/`；未改 `/chan_tv`

## Tests

见 `docs/TEST_REPORT/ECR-003.md`。

## Follow-ups

- CODE_REVIEW Approve
- 启发式参数（ATR 容差、lookback）后续可调