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AUDIT_TRACKER: V13-GAP-01~05 FIXED, GAP-06 PARTIALLY_FIXED wiki/middleware: 15层 (TrajectoryRecorder V13注册) wiki/log: 2026-04-13 变更记录 CLAUDE.md: 中间件链 14→15 层 Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
101 lines
4.3 KiB
Markdown
101 lines
4.3 KiB
Markdown
---
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title: 中间件链
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updated: 2026-04-11
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status: active
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tags: [module, middleware, runtime]
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---
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# 中间件链
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> 从 [[index]] 导航。关联模块: [[chat]] [[butler]] [[memory]]
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## 设计思想
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**中间件是请求处理的管道，按优先级顺序执行。**
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- 优先级 0-999，数值越小越先执行（`middleware.rs` 按升序排列）
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- 每层中间件实现 `AgentMiddleware` trait，4个 hook 点: `before_completion` / `before_tool_call` / `after_tool_call` / `after_completion`
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- 所有消息流（聊天、管家）都经过完整中间件链
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- 中间件可返回 `Stop`/`Block`/`AbortLoop` 决策来中断流程
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## 代码逻辑
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### 15 层中间件（注册顺序见 `kernel/mod.rs:190-360`）
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| # | 中间件 | 文件 | 职责 | 注册条件 |
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|---|--------|------|------|----------|
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| 1 | ButlerRouter | `middleware/butler_router.rs` | 语义技能路由 + system prompt 增强 | 始终 |
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| 2 | DataMasking | `middleware/data_masking.rs` | 手机号/身份证等敏感数据脱敏 | 始终 |
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| 3 | Compaction | `middleware/compaction.rs` | 超阈值时压缩对话历史 | `compaction_threshold > 0` |
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| 4 | Memory | `middleware/memory.rs` | 对话后自动提取记忆 | 始终 |
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| 5 | LoopGuard | `middleware/loop_guard.rs` | 防止工具调用无限循环 | 始终 |
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| 6 | TokenCalibration | `middleware/token_calibration.rs` | Token 用量校准 | 始终 |
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| 7 | SkillIndex | `middleware/skill_index.rs` | 注入技能索引到 system prompt | `!skill_index.is_empty()` |
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| 8 | Title | `middleware/title.rs` | 自动生成会话标题 | 始终 |
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| 9 | DanglingTool | `middleware/dangling_tool.rs` | 修复缺失的工具调用结果 | 始终 |
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| 10 | ToolError | `middleware/tool_error.rs` | 格式化工具错误供 LLM 恢复 | 始终 |
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| 11 | ToolOutputGuard | `middleware/tool_output_guard.rs` | 工具输出安全检查 | 始终 |
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| 12 | Guardrail | `middleware/guardrail.rs` | shell_exec/file_write/web_fetch 安全规则 | 始终 |
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| 13 | SubagentLimit | `middleware/subagent_limit.rs` | 限制并发子 agent | 始终 |
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| 14 | TrajectoryRecorder | `middleware/trajectory_recorder.rs` | 轨迹记录 + 压缩 | 始终 (V13-FIX-01 注册) |
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### 优先级分类（来自 `middleware.rs` 头注释）
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| 范围 | 类别 | 包含的中间件 |
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|------|------|-------------|
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| 100-199 | 上下文塑造 | Compaction, Memory |
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| 200-399 | 能力 | SkillIndex, Guardrail |
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| 400-599 | 安全 | LoopGuard, DataMasking |
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| 600-799 | 遥测 | TokenCalibration, Title, TrajectoryRecorder |
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### 中间件执行流
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```
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用户消息 → AgentLoop
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→ chain.run_before_completion(ctx)
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→ [按优先级升序] 每层 middleware.before_completion()
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→ Continue: 继续下一层
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→ Stop(reason): 中断循环，返回 reason
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→ LLM 调用
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→ (工具调用时) chain.run_before_tool_call()
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→ Allow: 允许执行
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→ Block(msg): 阻止，返回错误给 LLM
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→ ReplaceInput: 替换参数后允许
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→ AbortLoop: 立即终止整个循环
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→ chain.run_after_tool_call()
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→ chain.run_after_completion()
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```
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### 核心接口
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```rust
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// crates/zclaw-runtime/src/middleware.rs
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trait AgentMiddleware: Send + Sync {
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fn name(&self) -> &str;
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fn priority(&self) -> i32 { 500 }
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async fn before_completion(&self, ctx: &mut MiddlewareContext) -> Result<MiddlewareDecision>;
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async fn before_tool_call(&self, ctx: &MiddlewareContext, tool_name: &str, tool_input: &Value) -> Result<ToolCallDecision>;
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async fn after_tool_call(&self, ctx: &mut MiddlewareContext, tool_name: &str, result: &Value) -> Result<()>;
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async fn after_completion(&self, ctx: &MiddlewareContext) -> Result<()>;
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}
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```
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### 注册位置
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`crates/zclaw-kernel/src/kernel/mod.rs:190-345` — `create_middleware_chain()` 方法，13 次 `chain.register()` + 1 个条件注册。
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## 关联模块
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- [[butler]] — ButlerRouter 是管家模式的核心
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- [[chat]] — 每条消息经过完整中间件链
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- [[memory]] — Memory 中间件从对话提取记忆
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- [[hands-skills]] — SkillIndex 中间件注入技能索引
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## 关键文件
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| 文件 | 职责 |
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|------|------|
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| `crates/zclaw-runtime/src/middleware.rs` | AgentMiddleware trait + MiddlewareChain |
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| `crates/zclaw-runtime/src/middleware/` | 14 个中间件实现 (14个 .rs 文件) |
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| `crates/zclaw-kernel/src/kernel/mod.rs:190-345` | 注册入口 |
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