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Machine-produced by `pnpm run rescope-vendor --apply` plus the regeneration it prints: `pnpm install` for the lockfile, `pnpm run gen-third-party-notices`, `verify-translation-pairing --write` for the touched bilingual pairs, `gen-doc-graphs`, and one typert snapshot whose ids embed character offsets. `pnpm run rescope-vendor --check` verifies the result. Renames nine vendored packages (cordis, cosmokit, schemastery and the six @cordisjs plugins) and every reference that resolves them: manifest names and dependency keys, module specifiers including declare-module merges, cordis.yml plugin names, tsconfig paths, every Markdown fence, and `docs/` prose. Directory names, upstream versions, and dependency ranges are unchanged, so vendor/README.md still reads as an upstream snapshot; its manifest table gains an upstream-name column so THIRD_PARTY_NOTICES keeps MIT attribution pointed at each fork's origin. The tutorial tier follows the rename end to end: its yaml fences named plugins the Loader can no longer resolve, its `ts ignore-check` fences disagreed with the compiled fences beside them, and its prose quoted both. The contracts that told readers to keep upstream names — the root convention and the vendoring cookbook's tree comment and manifest invariant — now say to rescope instead. Two rules read `@deepseek-ai/` as "another workspace plugin": the client bundle purity gate now names the vendored libraries a browser bundle inlines, and the files where a bare `cordis` is an agent-preset id keep that product data.
144 lines
3.8 KiB
Markdown
144 lines
3.8 KiB
Markdown
# 事件系统
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[English](events.md) | 中文
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事件是 Cordis 插件间通信的核心机制。Harness 大量使用事件来实现松耦合的扩展点。
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## 基本用法
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### 监听事件
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```ts ignore-check
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ctx.on('event-name', (payload) => {
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// Handle the event.
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})
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```
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### 触发事件
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```ts ignore-check
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ctx.emit('event-name', payload)
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```
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## 事件模式
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Cordis 提供多种事件模式，适用于不同的交互约定：
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### emit — 广播
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所有监听器同步执行，返回值会被忽略：
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```ts ignore-check
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// Emit
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ctx.emit('my-plugin/ready', { id: 'worker-1' })
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// Listen
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ctx.on('my-plugin/ready', ({ id }) => {
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console.log(`${id} is ready`)
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})
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```
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### bail — 短路
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依次调用监听器，第一个非 `undefined` 的返回值将作为最终结果：
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```ts ignore-check
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// Dispatch
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const result = ctx.bail('some-check', input)
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// Listen: a returned value stops later listeners.
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ctx.on('some-check', (input) => {
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if (shouldBlock(input)) return 'blocked'
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// Return undefined to continue to the next listener.
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})
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```
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### serial — 顺序执行
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监听器按注册顺序依次执行，并等待异步结果；第一个返回非空值的监听器会终止后续执行：
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```ts ignore-check
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await ctx.serial('setup-phase', context)
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```
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### waterfall（瀑布式事件）— 流水线
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每个监听器可以包装下游返回值，形成处理链。**必须调用 `next()` 传递给下游**，不调用即会短路流水线：
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```ts ignore-check
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// Dispatch
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const output = await ctx.waterfall('my-plugin/transform', input, async () => input)
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// Listen: next() is mandatory.
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ctx.on('my-plugin/transform', async (_input, next) => {
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const downstream = await next()
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return downstream.trim()
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})
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```
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::: warning
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waterfall 监听器**必须调用 `next()`**。不调用 `next` 会短路整个流水线，这是故意为之的设计——用于实现拦截/网关逻辑。
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:::
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## 类型安全的事件
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Harness 使用 TypeScript 声明合并来为事件提供类型安全：
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```ts
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import '@deepseek-ai/cordis'
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declare module '@deepseek-ai/cordis' {
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interface Events {
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'my-plugin/ready': (payload: { id: string }) => void
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'my-plugin/check': (input: string) => boolean | undefined
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'my-plugin/transform': (input: string, next: () => Promise<string>) => Promise<string>
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}
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}
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// ctx.on('my-plugin/ready', ...) and ctx.emit('my-plugin/ready', ...)
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// are now inferred correctly.
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```
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## Cordis 事件与会话记录
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Harness 的 Cordis 事件遵循 `namespace/action` 命名，例如 `agent/step`、`agent/request`、`agent/request-error`、`tools/result` 和 `session/event`。完整签名与触发模式见[子系统页面](../../../subsystems/core.md)上生成的 `cordis-surface` 区块。
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`turn/*`、`step/*`、`tool/call`、`tool/result` 和 `compact/*` 是持久化的会话事件类型，不是同名 Cordis 事件。需要观察它们时，监听 `session/event` 并检查 `event.type`。
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## 事件监听器也是效果
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通过 `ctx.on()` 注册的监听器会在插件卸载时自动移除：
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```ts ignore-check
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export function apply(ctx: Context) {
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// This listener is removed when the plugin disposes.
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ctx.on('tools/result', handler)
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}
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```
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## 示例：日志插件
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这个插件记录工具调用和工具结果：
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```ts
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import type { Context } from '@deepseek-ai/cordis'
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import '@deepseek-ai/dsh-tools'
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export const name = 'tool-logger'
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export function apply(ctx: Context) {
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ctx.on('tools/result', (exec, result) => {
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console.log(`[tool] ${exec.name}(${JSON.stringify(exec.arguments)})`)
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const text = result.content
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.map(block => block.type === 'text' ? block.text : '')
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.join('')
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console.log(`[tool result] ${text.slice(0, 100)}`)
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})
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}
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```
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## 下一步
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- [能力分层](../practice/) — 了解能力接口中的事件
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- [LLM（大语言模型）适配器](../practice/llm-adapter.md) — 实现一个完整的 LLM 后端
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