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deepseek-harness/packages/support/acp-snapshot/README.zh.md
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2026-08-09 13:15:27 +08:00

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@deepseek-ai/dsh-acp-snapshot

English | 中文

ACP 快照套件工具包:无密钥快照层(pnpm run test:snapshot,见测试策略)背后的共享机制。示例只需场景表和 fixture 目录就能获得完整快照套件;每项比较/保护机制都位于此处,受每文件覆盖率门禁约束,而不是在每个示例中复制。

四层可单独导入:

  • launchAcpTestAgent(启动器):从指定 cwd 在 tsx 下启动源 agent,或在普通 Node 下启动已构建 lib agent;通过原始字节 stdout tee 连接 SDK 客户端,收集会话更新和 stderr,在启动阶段报告异步派生失败,并默认拒绝未处理的权限请求,并负责优雅或带信号关闭。关闭会等待进程退出、继承 stdio 关闭和 ACP parser 耗尽,然后才完成关闭或传播子级错误,使捕获内容完整,且调用方可在任一结果后移除自有路径。当 Windows 接受强制终止但异步发布退出标记时,关闭会给该标记有界宽限,然后才将回退拒绝视为第二次失败。快照和普通 e2e 套件共享该进程边界;测试只需提供 agent 路径、cwd、环境覆盖和任何权限策略。
  • runScenario(harness):通过启动器从确定性 input.json 脚本驱动 ACP JSON-RPC stdio,将原始 stdout tee 给预期输出和纯度检查,并在优雅 stdin EOF 后收集每个持久化原始 JSONL 会话日志(父会话和 subagent 子会话,主会话优先)。AgentUnderTest 提供绝对 binScript、可选 libBinScript、configPath 和 tsconfigPath 路径,因为子进程 cwd 位于仓库外。当生成子级 cwd 自身位于待测授权中时,workspaceParent 可以将它从平台临时目录移出。启动失败会在拒绝诊断中保留已捕获 agent stderr。
  • 规范化器:将已捕获接口转换为稳定文本或可移植 fixture 的纯函数:normalizeStdout(JSON-RPC id → 首次出现序列;UUID 以及生成 cwd 的每种原生/JavaScript 文件系统写法 → token,按最长优先;根据 cwd 的分隔符选择规范 / 或宿主原生形式;同时作为 stdout 纯度检查)、normalizeSessionLog(时间归零、保留 seq、使用同一 cwd 路径策略)、tokenizeSessionFixtureCwd(生成的 workspace 及其文件系统别名,包括已进行 token 化的 macOS /private 别名 → 单一规范 {{cwd}};手工编写的临时路径保持不变)、scrubSystemPrompts(提示词文本 → {{system}})、scrubToolSchemas(schema bulk → {{tools}})、scrubRequestHeaders(每个 pin 之外的所有 header bulk → {{system}}/{{tools}}/{{messagePrefix}},保留结构;见header 固定 Agent Note)和 stabilizeFixtureMessageIds(针对任意录制器已准备写入 fixture 的父级/子级日志,通过结构化方式仅改写 surface 和持久 inbox 中完整消息的 ID 字段,将已提交 UUID 带入未变化且双向唯一匹配的消息)。
  • defineAcpSnapshotSuite(工厂):为场景表注册完整 describe/it 树:每场景预期输出与重新持久化日志比较、录制/刷新 fixture 回写、拒绝结构化 UNKNOWN_TOOL 结果、每个 header 类别一个 token 化 pin(由可独立共享的 system-prompt.expected.md 和 tool-schemas.expected.json sidecar 组合而成),以及实时一致性保护。其 fixture 保护会拒绝遗留场景目录、缺失文件、一个类别包含多个 pin、重复的 sidecar 内容、带非规范 macOS 前缀的 cwd token、未擦除的 JSONL header,以及格式错误的 pin header。在录制或刷新模式写入 fixture 前,仅当一条未变化完整消息的 ID 及其去除身份后的指纹在场景可写入 fixture 的父级/子级日志中均唯一时,该消息才会保留已提交的 UUID;会话包的权威 surface 类型谓词负责选择 surface 载体,与其关联的 agent/inbox/spliced 副本也纳入同一映射,且仅改写这些载体中通过验证的 id 字段。新增、发生变化、格式错误以及图关系存在歧义的消息保留本次生成的 UUID。刷新会使用收集所得本次运行的 id、cwd 及全部 cwd 别名评估本次生成的叶值;只有完整逻辑记录布局对齐且易变字符串替换形成双射时,才会复用归一化后等价的叶值;surface 或 inbox 载体中的完整消息 ID 不参与此路径,因为后续结构化处理负责这些 ID;有歧义的日志保留本次生成的字符串,而本次生成的语义值仍为权威数据。它还会在对齐事件时间前展开打包时序 envelope,因此切换打包/非打包布局无法移动后续记录。新插入的 session/title 使用前一个事件的时间,因此功能驱动的插入不会扰动 fixture 余下部分。每个场景目录的 session.jsonl 和连续 session.<n>.jsonl 同级文件构成有序的主会话/子会话清单;场景表不重复其数量。必须在 vitest 收集时调用。

签入仓库的会话 fixture 使用规范打包行。合并此约定的在途分支通过 pnpm run migrate:packed-session-fixtures 运行临时仓库迁移器;待受影响分支收敛后,由其移除提案负责删除该迁移器。

消费方 *.snapshot.ts 就是场景表加一次工厂调用:

import { dirname, join } from 'node:path'
import { fileURLToPath } from 'node:url'
import {
  defineAcpSnapshotSuite,
  type Scenario,
  type SnapshotSuiteOptions,
} from '@deepseek-ai/dsh-acp-snapshot'

function snapshotMode(value: string | undefined): SnapshotSuiteOptions['mode'] {
  switch (value) {
    case undefined:
    case '':
    case 'replay': return 'replay'
    case 'record': return 'record'
    case 'refresh': return 'refresh'
    default: throw new Error(`unknown DSH_SNAPSHOT mode: ${value}`)
  }
}

const SCENARIOS: Scenario[] = [
  { name: 'text-turn', hasModelTurn: true, recorded: true, pinsHeader: true },
]

defineAcpSnapshotSuite({
  agent: { // absolute paths, resolved from the suite's own location
    binScript: fileURLToPath(new URL('../../../packages/examples/acp-demo/src/bin.ts', import.meta.url)),
    configPath: fileURLToPath(new URL('../cordis.yml', import.meta.url)),
    tsconfigPath: fileURLToPath(new URL('../../../tsconfig.json', import.meta.url)),
  },
  snapshotsDir: join(dirname(fileURLToPath(import.meta.url)), 'snapshots'),
  scenarios: SCENARIOS, // exactly one entry per header class sets pinsHeader
  mode: snapshotMode(process.env.DSH_SNAPSHOT),
})

启动不同组合树的场景会设置自己的 configPath(一个 basename 仍以 cordis.yml 结尾的 overlay,使 bin 的回放交换可找到同级 *cordis.snapshot.yml);当该组合改变请求 header 时,还会设置自己的 headerClass 和 pin 场景,acp-agent 示例的 Code Mode 与文件系统场景是模板。默认生成的 workspace 在会话 fixture 中存储为 {{cwd}},使平台临时根目录和随机 basename 不影响录制结果;当临时目录授权自身待测时,workspaceParent 将生成 cwd 移出平台临时区域,在 fixture 中保留该显式路径,并仍归父级所有,而 harness 只移除生成的子级。场景签入的 workspace/ 会先复制到该子级,随后 prepareWorkspace 在 agent 启动前针对生成 cwd 运行。此 hook 仅用于 Git 无法跨平台表示的 fixture;普通种子应留在 workspace/ 中,而生成路径在 Windows 上无效时还必须搭配 posixOnly。

每个 pin 默认拥有其生成的 system-prompt.expected.md 或 tool-schemas.expected.json;当完整的对应序列相同时,systemPromptSource 和 toolSchemasSource 指定另一个 pin 作为来源,因此每个不同版本只提交一次。该 pin 的 session.jsonl 存储 "system":"{{system}}","tools":"{{tools}}",同时保留配置、原因和任何模型可见前缀。具有合法运行中 header 变更的 pin 声明 expectedHeaderChanges;共享来源必须声明相同的 header 变更数量,录制/刷新会拒绝生成不同字节的共享引用方。

每个场景都比较 stdout.expected.jsonl,其中以 cwd 为根的分隔符规范化为 /。在 Windows 上,pinsNativeWindowsStdout 还会在共享预期输出之后比较完整 stdout.expected.windows.jsonl,并在启用时精确要求该 sidecar。需要非 Windows 主机的场景声明 posixOnly,在 Windows 上跳过运行测试,但 fixture 保护仍在所有平台覆盖其已提交文件;示例包括 POSIX 进程语义(例如取消实时 bash 调用会终止脱离进程组)和 Windows 无法表示的生成路径。组合需要可用 pwsh 的场景声明 pwshOnly;调用方提供的 hasPwsh 探测(随附的 acp-agent 套件遵循执行器自身的解析,因此 Program Files 安装也计入)在解析不到可用 pwsh 时跳过运行测试,而 fixture 保护仍处处覆盖其已提交文件。

示例还发布 cordis.snapshot.yml 回放 overlay,位于 cordis.yml 旁边(bin 在 DSH_SNAPSHOT=replay 下交换它们,见单源回放配置 Agent Note);回放 fixture 由 dsh-llm-replay 提供,该包通过对子级设置的 DSH_SNAPSHOT_* env var 指向它。pnpm run test:snapshot:record 调用实时 LLM,并重写已记录场景的模型 fixture;pnpm run test:snapshot:refresh 保持无密钥,运行回放 overlay,并从已提交模型脚本重写 stdout、可比较会话日志预期输出,以及各 pin 自有的提示词与工具 schema sidecar。Fixture 角色、录制/回放/刷新语义和场景表字段记录在 Scenario 以及快照 Agent Note 中。

约束:suite.ts 与 harness.ts 导入 vitest(harness 通过 vi.waitFor 轮询其持久边界等待),因此包入口只能在 vitest 运行中导入(启动器和规范化器没有此依赖,但从同一入口发布)。启动器和套件工厂按设计专用于 ACP,启动器使用 SDK 的 ClientSideConnection;规范化器是与传输无关的会话日志/文本辅助工具,还由 JSON-RPC 和 Web 快照录制器消费。输入脚本覆盖初始化、新建会话、文本提示、取消、预期 RPC 失败和持久轮次边界等待。权限往返是选项类别选择(allow_once、reject_once 等)的 FIFO 队列,映射到 agent 发出的 optionId;缺少或耗尽的队列回答 cancelled,未提供类别会拒绝运行。

模型体验

无。该测试专用 harness 记录、规范化并比较 ACP transcript,不会改变 agent 组装的模型请求。

KV Cache 影响

无;该包既不组装也不发送提供方请求。

已知限制与暂缓事项

  • 会话收集需要原始 JSONL mode:runScenario 收集持久化 .jsonl 日志,因此快照配置使用 persistenceCompression: 'none';压缩 JSONL 和 SQLite 组合没有快照收集路径。
  • 构建 mode 需要当前产物:先运行 pnpm run build,再选择 DSH_EXAMPLE_MODE=lib;源 mode 仍是零构建路径。
  • 后端覆盖仍使用 ACP 驱动器:保留场景为何使用该传输,见仅自动化 ACP 决策。