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        },
        {
          "line": 416,
          "text": "    const path = method.split(\".\");"
        },
        {
          "line": 417,
          "text": "    let node = root;"
        },
        {
          "line": 418,
          "text": "    for (const part of path.slice(0, -1)) node = node[part] ??= {};"
        },
        {
          "line": 419,
          "text": "    node[path.at(-1)] = (...args) => {"
        },
        {
          "line": 420,
          "text": "      while (args.length && args.at(-1) === undefined) args.pop();"
        },
        {
          "line": 421,
          "text": "      if (typeof args.at(-1) === \"function\") {"
        },
        {
          "line": 422,
          "text": "        throw new TypeError(`${method}: tabbit.evaluate supports promise-style chrome APIs only`);"
        },
        {
          "line": 423,
          "text": "      }"
        },
        {
          "line": 424,
          "text": "      return call(method, structuredClone(args));"
        },
        {
          "line": 425,
          "text": "    };"
        }
      ]
    },
    {
      "id": "D10",
      "kind": "shipped-text-observation",
      "path": "runtime/src/agent-bridge.mjs",
      "startLine": 8,
      "endLine": 15,
      "lines": [
        {
          "line": 8,
          "text": "// Only registered, packaged adapters can run. A renderer cannot supply modules,"
        },
        {
          "line": 9,
          "text": "// executable paths or shell commands. Future adapters need no new Native API."
        },
        {
          "line": 10,
          "text": "const providers = ["
        },
        {
          "line": 11,
          "text": "  codexProvider,"
        },
        {
          "line": 12,
          "text": "  claudeProvider,"
        },
        {
          "line": 13,
          "text": "  workbuddyProvider,"
        },
        {
          "line": 14,
          "text": "  cursorProvider,"
        },
        {
          "line": 15,
          "text": "];"
        }
      ]
    },
    {
      "id": "D11",
      "kind": "shipped-text-observation",
      "path": "runtime/src/agent-provider-codex.mjs",
      "startLine": 60,
      "endLine": 80,
      "lines": [
        {
          "line": 60,
          "text": "async function readHistory(method, params, timeoutMs = 15000) {"
        },
        {
          "line": 61,
          "text": "  const child = spawnAgentProcess(await codexPath(), ['app-server', '--listen', 'stdio://']);"
        },
        {
          "line": 62,
          "text": "  // A following exec resume must not race the app-server's writer lock."
        },
        {
          "line": 63,
          "text": "  const closed = new Promise((resolve) => child.once('close', resolve));"
        },
        {
          "line": 64,
          "text": "  try {"
        },
        {
          "line": 65,
          "text": "    return await watchJsonProcess(child, {"
        },
        {
          "line": 66,
          "text": "      timeoutMs,"
        },
        {
          "line": 67,
          "text": "      maxBytes: 32 * 1024 * 1024,"
        },
        {
          "line": 68,
          "text": "      initialize(channel) {"
        },
        {
          "line": 69,
          "text": "        channel.send({"
        },
        {
          "line": 70,
          "text": "          id: 1,"
        },
        {
          "line": 71,
          "text": "          method: 'initialize',"
        },
        {
          "line": 72,
          "text": "          params: { clientInfo: { name: 'tabbit_agent_bridge', version: '0.1.0' } },"
        },
        {
          "line": 73,
          "text": "        });"
        },
        {
          "line": 74,
          "text": "      },"
        },
        {
          "line": 75,
          "text": "      onMessage(message, channel) {"
        },
        {
          "line": 76,
          "text": "        if (message.error) throw new AgentError('Codex 无法读取历史，请重新选择');"
        },
        {
          "line": 77,
          "text": "        if (message.id === 1) {"
        },
        {
          "line": 78,
          "text": "          channel.send({ method: 'initialized' });"
        },
        {
          "line": 79,
          "text": "          channel.send({ id: 2, method, params });"
        },
        {
          "line": 80,
          "text": "        } else if (message.id === 2) channel.resolve(message.result);"
        }
      ]
    },
    {
      "id": "D12",
      "kind": "shipped-text-observation",
      "path": "runtime/package.json",
      "startLine": 1,
      "endLine": 13,
      "lines": [
        {
          "line": 1,
          "text": "{"
        },
        {
          "line": 2,
          "text": "  \"name\": \"@tabbit/playwright-agent\","
        },
        {
          "line": 3,
          "text": "  \"version\": \"0.1.0\","
        },
        {
          "line": 4,
          "text": "  \"private\": true,"
        },
        {
          "line": 5,
          "text": "  \"type\": \"module\","
        },
        {
          "line": 6,
          "text": "  \"engines\": {"
        },
        {
          "line": 7,
          "text": "    \"node\": \">=24.0.0\""
        },
        {
          "line": 8,
          "text": "  },"
        },
        {
          "line": 9,
          "text": "  \"scripts\": {"
        },
        {
          "line": 10,
          "text": "    \"test\": \"vpython3 run_tests.py\","
        },
        {
          "line": 11,
          "text": "    \"r6\": \"node scripts/r6-installed-smoke.mjs\""
        },
        {
          "line": 12,
          "text": "  }"
        },
        {
          "line": 13,
          "text": "}"
        }
      ]
    },
    {
      "id": "D13",
      "kind": "shipped-text-observation",
      "path": "runtime/src/playbooks.mjs",
      "startLine": 11,
      "endLine": 14,
      "lines": [
        {
          "line": 11,
          "text": "// Packaged runtime/src is two levels below skills. Tests inject their fixture"
        },
        {
          "line": 12,
          "text": "// root because source checkout layout is intentionally not a runtime bundle."
        },
        {
          "line": 13,
          "text": "const DEFAULT_PLAYBOOK_ROOT = fileURLToPath(new URL("
        },
        {
          "line": 14,
          "text": "  \"../../skills/tabbit/playbooks/\", import.meta.url));"
        }
      ]
    }
  ],
  "boundedSearch": {
    "scope": "All 37 runtime/src files only",
    "pattern": "\\bupstream\\b|\\brebase\\b|\\bgclient\\b|\\bDEPS\\b|BUILD\\.gn|runtime_release_manifest|runtime_stage|\\bupdate(r)?\\b|\\bdownload.*runtime\\b|remote-debugging|new WebSocket|chromium\\.launch|chromium\\.connect",
    "matches": [
      {
        "path": "runtime/src/agent-history-jsonl.mjs",
        "line": 57,
        "text": "fingerprint: createHash('sha256').update(content).digest('hex'),"
      },
      {
        "path": "runtime/src/agent-windows-uia.ps1",
        "line": 200,
        "text": "# Never overwrite a clipboard update made by the user/another application."
      },
      {
        "path": "runtime/src/persistent-evaluator.mjs",
        "line": 1424,
        "text": "const sha256 = createHash(\"sha256\").update(data).digest(\"hex\");"
      },
      {
        "path": "runtime/src/task-worker.mjs",
        "line": 76,
        "text": "const browser = await chromium.connectOverCDP(transport, {noDefaults: true});"
      }
    ],
    "interpretation": "No observed Chromium sync pipeline/updater; hash .update and clipboard comment are irrelevant; connectOverCDP is the positive connection evidence",
    "negativeConclusionScope": "Only this installed runtime/src, not the browser project or binaries"
  },
  "optionalCloudImporterSearch": {
    "scope": "37 runtime/src files",
    "pattern": "agent-workbuddy-openapi",
    "matches": [],
    "conclusion": "No observed importer in searched source set; remote availability and external imports unknown"
  },
  "unknowns": [
    "Chromium upstream revision and patch queue",
    "Browser-side private bridge and CDP policy implementation",
    "Playwright vendor changes / stock identity",
    "CLI/launcher binary implementation and endpoint discovery",
    "Actual Node binary version",
    "Independent deployment/update pipeline",
    "Runtime stamp derivation",
    "Authenticode validity",
    "Live behavior"
  ]
}