# File Map — Who Owns What

## apps/api

```
apps/api/
  cmd/server/          # main only: wire deps, start HTTP
  internal/
    handler/           # HTTP bind/unbind, validate input, call service interfaces
    service/<domain>/  # business rules, transactions orchestration
    repository/        # SQL / DB access only
    model/             # DB structs / domain structs (no HTTP types leakage preferred)
    middleware/        # auth, request id, recovery helpers
    config/            # env config
  pkg/                 # small reusable libs (e.g. response envelope)
  migrations/          # schema versions
```

### Forbidden placements

| Wrong | Right |
|---|---|
| SQL in `handler/` | `repository/` |
| gin.Context in `repository/` | keep HTTP out of repo |
| Business unlock rules only in UI | `service/` + persist |
| Fat `pkg/utils` | domain package or focused pkg |

## apps/user-h5

```
src/
  pages/        # route screens
  components/   # reusable UI
  api/          # thin wrappers → @yuxingu/sdk
  stores/       # pinia
  hooks/        # composables
  router/
  layouts/
  assets/
```

No raw `fetch` in `pages/`.

## packages

| Package | Owns |
|---|---|
| `sdk` | HTTP client + adapters |
| `types` | Shared TS domain types |
| `utils` | Pure helpers |
| `ui` | CSS tokens |

## .ai/

Rules, ADR, patterns, examples, playbooks, checklists. Not runtime code.

### Environment docs

| Path | Owns |
|---|---|
| `environment.md` | Local vs CI vs Prod policy |
| `development.md` | Host Go / Vite local rules |
| `docker.md` | When Docker is / is not used |
| `deployment.md` | Prod immutable images / CI |
| `commands.md` | Copy-paste commands |

Runtime compose for **deps only**: repo-root `docker-compose.dev.yml`.

### .ai/product/ & .ai/domain/

| Path | Owns |
|---|---|
| `product/lexicon.md` | 产品中文语言契约（最高优先级） |
| `product/feature-design.md` | Feature Spec 强制规范 |
| `product/feature-spec/` | 单功能详细设计（流程/规则/API/验收） |
| `product/user-journey.md` | 转化路径 |
| `product/page-tree.md` | H5 路由冻结 |
| `product/feature-map.md` | 能力树 · 五 Tab 冻结 |
| `product/ENGINEERING-FREEZE.md` | P1 真源索引 |
| `playbooks/feature-spec.md` | Spec → 实现步骤 |
| `domain/domain-map.md` + `erd.md` | Contexts + 表结构 |
| `architecture/go-services.md` | Go 包边界 |
| `domain.md` | Tech ↔ 用户名 |

### .ai/design/

| Path | Owns |
|---|---|
| `reverse-engineering-spec.md` | 竞品/成熟 App 逆向工程规范（STEP 1–18 · Evidence First） |
| `design-system.md` | Tokens, color, type, spacing, motion, voice |
| `component-catalog.md` | Allowed reusable UI components |
| `platform/*.md` | H5 / mini-program / website / Flutter limits |

Runtime CSS tokens: `packages/ui/src/tokens.css` (must stay aligned with design-system).

## apps/docs/

Product / business docs (not engineering rules):

| Path | Owns |
|---|---|
| `README.md` | Reading order |
| `analysis/` | Competitor teardowns |
| `prd-mvp.md` | MVP scope & acceptance |
| `business-model.md` | Revenue layers |
| `product-roadmap.md` | Phased vertical slices |
| `adr/` | Optional business-facing ADRs |

Engineering standards live in `.ai/` only; `apps/docs/standards/*` is deprecated.

## Legacy (do not extend)

Root `yuxingu.html`, `pages/`, `css/`, `js/`, `server.py`.