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# Implementation Plan: [FEATURE]
**Branch**: `[###-feature-name]` | **Date**: [DATE] | **Spec**: [link]
**Input**: Feature specification from `/specs/[###-feature-name]/spec.md`
**Note**: This template is filled in by the `/speckit.plan` command. See `.specify/templates/commands/plan.md` for the execution workflow.
## Summary
[Extract from feature spec: primary requirement + technical approach from research]
## Technical Context
**Language/Version**: Go 1.25+ (静态链接,单二进制交付)
**Primary Dependencies**: Fiber v3HTTP 服务、Viper配置、Logrus + Lumberjack结构化日志 & 滚动)、标准库 `net/http`/`io`
**Storage**: 本地文件系统缓存目录 `StoragePath/<Hub>/<path>` + `.meta` 元数据
**Testing**: `go test ./...`,使用 `httptest`、临时目录和自建上游伪服务验证配置/缓存/代理路径
**Target Platform**: Linux/Unix CLI 进程,由 systemd/supervisor 管理,匿名下游客户端
**Project Type**: 单 Go 项目(`cmd/` 入口 + `internal/*` 包)
**Performance Goals**: 缓存命中直接返回;回源路径需流式转发,单请求常驻内存 <256MB命中/回源日志可追踪
**Constraints**: 禁止 Web UI 或账号体系;所有行为受单一 TOML 配置控制;每个 Hub 需独立 Domain/Port 绑定;仅匿名访问
**Scale/Scope**: 支撑 Docker/NPM/Go/PyPI 等多仓代理,面向弱网及离线缓存复用场景
## Constitution Check
*GATE: Must pass before Phase 0 research. Re-check after Phase 1 design.*
- Feature 仍然是“轻量多仓 CLI 代理”,未引入 Web UI、账号体系或与代理无关的能力。
- 仅使用 Go + 宪法指定依赖;任何新第三方库都已在本计划中说明理由与审核结论。
- 行为完全由 `config.toml` 控制,新增配置项已规划默认值、校验与迁移策略。
- 方案维持缓存优先 + 流式回源路径,并给出命中/回源/失败的日志与观测手段。
- 计划内列出了配置解析、缓存读写、Host Header 路由等强制测试与中文注释交付范围。
## Project Structure
### Documentation (this feature)
```text
specs/[###-feature]/
├── plan.md # This file (/speckit.plan command output)
├── research.md # Phase 0 output (/speckit.plan command)
├── data-model.md # Phase 1 output (/speckit.plan command)
├── quickstart.md # Phase 1 output (/speckit.plan command)
├── contracts/ # Phase 1 output (/speckit.plan command)
└── tasks.md # Phase 2 output (/speckit.tasks command - NOT created by /speckit.plan)
```
### Source Code (repository root)
```text
cmd/any-hub/main.go # CLI 入口、参数解析
internal/config/ # TOML 加载、默认值、校验
internal/server/ # Fiber 服务、路由、中间件
internal/cache/ # 磁盘/内存缓存与 .meta 管理
internal/proxy/ # 上游访问、缓存策略、流式复制
configs/ # 示例 config.toml如需
tests/ # `go test` 下的单元/集成测试,用临时目录
```
**Structure Decision**: 采用单 Go 项目结构,特性代码应放入上述现有目录;如需新增包或目录,必须解释其与 `internal/*` 的关系并给出后续维护策略。
## Complexity Tracking
> **Fill ONLY if Constitution Check has violations that must be justified**
| Violation | Why Needed | Simpler Alternative Rejected Because |
|-----------|------------|-------------------------------------|
| [e.g., 4th project] | [current need] | [why 3 projects insufficient] |
| [e.g., Repository pattern] | [specific problem] | [why direct DB access insufficient] |