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{"type":"assistant","message":{"model":"claude-sonnet-4-6","id":"msg_01LeQTnUr2fAiwbrzyqxC8D5","type":"message","role":"assistant","content":[{"type":"thinking","thinking":"Let me research Rust across three sites using the browser automation tools.","signature":"EogCClsIDBgCKkDFhgtmyfNmZxBfVfuEAn3taJtBbEAYLCpBJ04nJkATJRDzk9shyil6ij13SBnauyLJFHLSUmCJDxGDPrybWiyAMhFjbGF1ZGUtc29ubmV0LTQtNjgAEgz3e9U6lB4lOcjmlcEaDH2X69Fs5T1xCAZLFyIwXj3MQ71ZtQxAF03XybtBdpus0mzljxidKjNF9PdwTzCCbUL4nw/pRfzAkQSUMR49KltGiZZXJN31Xk6WhiahK4Qyd3Bl4q3ZaMncFo/00A4K+lZbAlnCgAjWkifvbw3QoHc9EynQgj4wD7tKF+gfYqUA+eOhEqWqJAajSeM6t1Mp7M8np3w0jyqNeXltGAE="}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":7521,"cache_read_input_tokens":8445,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":7521},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"parent_tool_use_id":null,"session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"24d73a23-46ee-4f94-8484-386b946213cc"}
{"type":"assistant","message":{"model":"claude-sonnet-4-6","id":"msg_01LeQTnUr2fAiwbrzyqxC8D5","type":"message","role":"assistant","content":[{"type":"tool_use","id":"toolu_01UESErt7q66wFp12MNjG42w","name":"Agent","input":{"description":"Research Rust across three sites","prompt":"Research the Rust programming language across three sites using the Chrome DevTools browser automation tools available at ./servers/chrome-devtools/index.js. Write and run TypeScript scripts to navigate to each site and extract specific information.\n\n1. Navigate to https://en.wikipedia.org/wiki/Rust_(programming_language) — find and report who designed Rust\n2. Navigate to https://github.com/rust-lang/rust — find and report the star count\n3. Navigate to https://www.rust-lang.org/ — find and report the tagline or main description\n\nUse navigatePage and takeSnapshot from ./servers/chrome-devtools/index.js. Write scripts in the current working directory (/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace).\n\nFor each site, write a separate script file and run it with `npx tsx`. Extract the relevant text from the snapshots.\n\nReturn a summary with all three pieces of information.","subagent_type":"general-purpose"},"caller":{"type":"direct"}}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":2,"cache_creation_input_tokens":7521,"cache_read_input_tokens":8445,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":7521},"output_tokens":8,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"parent_tool_use_id":null,"session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"1b32662f-1dcf-425c-ba24-837f2ef66f9e"}
{"type":"system","subtype":"task_started","task_id":"a77e7a308d3d68e78","tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","description":"Research Rust across three sites","task_type":"local_agent","prompt":"Research the Rust programming language across three sites using the Chrome DevTools browser automation tools available at ./servers/chrome-devtools/index.js. Write and run TypeScript scripts to navigate to each site and extract specific information.\n\n1. Navigate to https://en.wikipedia.org/wiki/Rust_(programming_language) — find and report who designed Rust\n2. Navigate to https://github.com/rust-lang/rust — find and report the star count\n3. Navigate to https://www.rust-lang.org/ — find and report the tagline or main description\n\nUse navigatePage and takeSnapshot from ./servers/chrome-devtools/index.js. Write scripts in the current working directory (/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace).\n\nFor each site, write a separate script file and run it with `npx tsx`. Extract the relevant text from the snapshots.\n\nReturn a summary with all three pieces of information.","uuid":"913916d8-589f-4905-84e7-90b82b2c5823","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a"}
{"type":"user","message":{"role":"user","content":[{"type":"text","text":"Research the Rust programming language across three sites using the Chrome DevTools browser automation tools available at ./servers/chrome-devtools/index.js. Write and run TypeScript scripts to navigate to each site and extract specific information.\n\n1. Navigate to https://en.wikipedia.org/wiki/Rust_(programming_language) — find and report who designed Rust\n2. Navigate to https://github.com/rust-lang/rust — find and report the star count\n3. Navigate to https://www.rust-lang.org/ — find and report the tagline or main description\n\nUse navigatePage and takeSnapshot from ./servers/chrome-devtools/index.js. Write scripts in the current working directory (/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace).\n\nFor each site, write a separate script file and run it with `npx tsx`. Extract the relevant text from the snapshots.\n\nReturn a summary with all three pieces of information."}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"e823020e-4fbc-4c10-8d8d-4aff47a6b5c7","timestamp":"2026-04-07T19:51:00.404Z"}
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{"type":"user","message":{"role":"user","content":[{"type":"tool_result","content":"File does not exist. Note: your current working directory is /Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace. Did you mean index.ts?","is_error":true,"tool_use_id":"toolu_01Vf4aDrc1MwMD5ornBFxWzr"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"2b57f7d3-2a8c-40ca-99b7-a412816ae206","timestamp":"2026-04-07T19:51:02.933Z","tool_use_result":"Error: File does not exist. Note: your current working directory is /Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace. Did you mean index.ts?"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01GwJaBFHUzCgxqusmRM1qp3","type":"tool_result","content":"/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/click.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/closePage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/drag.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/emulate.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/evaluateScript.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/fill.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/fillForm.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/getConsoleMessage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/getNetworkRequest.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/handleDialog.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/hover.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/lighthouseAudit.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/listConsoleMessages.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/listNetworkRequests.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/listPages.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/navigatePage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/newPage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/performanceAnalyzeInsight.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/performanceStartTrace.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/performanceStopTrace.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/pressKey.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/resizePage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/selectPage.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/takeMemorySnapshot.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/takeScreenshot.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/takeSnapshot.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/typeText.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/uploadFile.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/waitFor.ts\n/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/servers/chrome-devtools/index.ts"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01A1LUKKsVtCpeQVMsem6ygh","type":"tool_result","content":"     1→// auto-generated by codegen.ts — do not edit\n     2→import { callTool } from \"../../browser-code/client.js\";\n     3→\n     4→export interface NavigatePageInput {\n     5→  /** Navigate the page by URL, back or forward in history, or reload. */\n     6→  type?: string;\n     7→  /** Target URL (only type=url) */\n     8→  url?: string;\n     9→  /** Whether to ignore cache on reload. */\n    10→  ignoreCache?: boolean;\n    11→  /** Whether to auto accept or beforeunload dialogs triggered by this navigation. Default is accept. */\n    12→  handleBeforeUnload?: string;\n    13→  /** A JavaScript script to be executed on each new document before any other scripts for the next navigation. */\n    14→  initScript?: string;\n    15→  /** Maximum wait time in milliseconds. If set to 0, the default timeout will be used. */\n    16→  timeout?: number;\n    17→}\n    18→\n    19→/** Go to a URL, or back, forward, or reload. Use project URL if not specified otherwise. */\n    20→export async function navigatePage(input: NavigatePageInput = {}): Promise<string> {\n    21→  return callTool(\"navigate_page\", input);\n    22→}\n    23→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"00f5c5dd-4e57-42ce-a542-e453c3861928","timestamp":"2026-04-07T19:51:07.709Z"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0189Tn6rYjSpzrb8SEW5b38Q","type":"tool_result","content":"     1→// auto-generated by codegen.ts — do not edit\n     2→import { callTool } from \"../../browser-code/client.js\";\n     3→import { resolve } from \"node:path\";\n     4→\n     5→export interface TakeSnapshotInput {\n     6→  /** Whether to include all possible information available in the full a11y tree. Default is false. */\n     7→  verbose?: boolean;\n     8→  /** The absolute path, or a path relative to the current working directory, to save the snapshot to instead of attaching it to the response. */\n     9→  filePath?: string;\n    10→}\n    11→\n    12→/** Take a text snapshot of the currently selected page based on the a11y tree. The snapshot lists page elements along with a unique\n    13→identifier (uid). Always use the latest snapshot. Prefer taking a snapshot over taking a screenshot. The snapshot indicates the element selected\n    14→in the DevTools Elements panel (if any). */\n    15→export async function takeSnapshot(input: TakeSnapshotInput = {}): Promise<string> {\n    16→  if (input.filePath && !input.filePath.startsWith(\"/\")) {\n    17→    input = { ...input, filePath: resolve(input.filePath) };\n    18→  }\n    19→  return callTool(\"take_snapshot\", input);\n    20→}\n    21→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"cccc9ddd-2ddc-46b0-8ae5-8ed30565a426","timestamp":"2026-04-07T19:51:08.529Z"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01UfKvbKjZpHaBfgqCtUL4yi","type":"tool_result","content":"     1→// auto-generated by codegen.ts — do not edit\n     2→export * from \"./click.js\";\n     3→export * from \"./closePage.js\";\n     4→export * from \"./drag.js\";\n     5→export * from \"./emulate.js\";\n     6→export * from \"./evaluateScript.js\";\n     7→export * from \"./fill.js\";\n     8→export * from \"./fillForm.js\";\n     9→export * from \"./getConsoleMessage.js\";\n    10→export * from \"./getNetworkRequest.js\";\n    11→export * from \"./handleDialog.js\";\n    12→export * from \"./hover.js\";\n    13→export * from \"./lighthouseAudit.js\";\n    14→export * from \"./listConsoleMessages.js\";\n    15→export * from \"./listNetworkRequests.js\";\n    16→export * from \"./listPages.js\";\n    17→export * from \"./navigatePage.js\";\n    18→export * from \"./newPage.js\";\n    19→export * from \"./performanceAnalyzeInsight.js\";\n    20→export * from \"./performanceStartTrace.js\";\n    21→export * from \"./performanceStopTrace.js\";\n    22→export * from \"./pressKey.js\";\n    23→export * from \"./resizePage.js\";\n    24→export * from \"./selectPage.js\";\n    25→export * from \"./takeMemorySnapshot.js\";\n    26→export * from \"./takeScreenshot.js\";\n    27→export * from \"./takeSnapshot.js\";\n    28→export * from \"./typeText.js\";\n    29→export * from \"./uploadFile.js\";\n    30→export * from \"./waitFor.js\";\n    31→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"7620c83a-ba28-4e94-a232-1104f8fe9092","timestamp":"2026-04-07T19:51:08.877Z"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_0135w4UgpSNqGsDCXETnZoiC","type":"tool_result","content":"     1→/**\n     2→ * Browser automation library for code-mode benchmarks.\n     3→ *\n     4→ * Thin wrapper that calls chrome-devtools-mcp tools via a local HTTP bridge.\n     5→ * The bridge (bridge.ts) maintains a persistent MCP session so browser state\n     6→ * persists across scripts.\n     7→ *\n     8→ * The agent must know tool names and build arguments — this library does NOT\n     9→ * provide high-level wrappers. This keeps the interface close to raw MCP,\n    10→ * isolating the \"code execution\" variable.\n    11→ *\n    12→ * Usage:\n    13→ *   import { callTool, listTools } from \"./browser-code\";\n    14→ *   const tools = await listTools();\n    15→ *   const result = await callTool(\"navigate_page\", { url: \"https://example.com\" });\n    16→ *   console.log(result);\n    17→ */\n    18→\n    19→const BRIDGE_URL = process.env.BROWSER_CODE_BRIDGE_URL ?? \"http://127.0.0.1:9223\";\n    20→\n    21→/** List all available tools from the chrome-devtools-mcp server. */\n    22→export async function listTools(): Promise<Array<{ name: string; description?: string }>> {\n    23→  const res = await fetch(`${BRIDGE_URL}/tools`);\n    24→  if (!res.ok) throw new Error(`listTools failed: ${await res.text()}`);\n    25→  return res.json();\n    26→}\n    27→\n    28→/**\n    29→ * Call an MCP tool by name with the given arguments.\n    30→ * Returns the text content of the tool result.\n    31→ *\n    32→ * Example:\n    33→ *   await callTool(\"navigate_page\", { url: \"https://example.com\" })\n    34→ *   await callTool(\"take_snapshot\")\n    35→ *   await callTool(\"click\", { element: \"@e1\" })\n    36→ */\n    37→export async function callTool(name: string, args: Record<string, unknown> = {}): Promise<string> {\n    38→  const res = await fetch(`${BRIDGE_URL}/call`, {\n    39→    method: \"POST\",\n    40→    headers: { \"Content-Type\": \"application/json\" },\n    41→    body: JSON.stringify({ name, args }),\n    42→  });\n    43→  const data = await res.json() as { result?: string; error?: string };\n    44→  if (data.error) throw new Error(data.error);\n    45→  return data.result ?? \"\";\n    46→}\n    47→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"ffd13dd9-5ff3-43ce-8411-e220d78827d0","timestamp":"2026-04-07T19:51:17.076Z"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01AgvKWd4QsnnV8igL5bN8Pn","type":"tool_result","content":"     1→# Tools\n     2→\n     3→You have strongly-typed TypeScript wrappers for browser automation at\n     4→`./servers/chrome-devtools/`. Each MCP tool is a separate `.ts` module\n     5→with typed input interfaces. Browse the directory to discover tools.\n     6→\n     7→Write a `.ts` script and run it with `npx tsx`. Example:\n     8→\n     9→    import { navigatePage, takeSnapshot } from \"./servers/chrome-devtools/index.js\";\n    10→\n    11→    const page = await navigatePage({ url: \"https://example.com\" });\n    12→    const snap = await takeSnapshot({});\n    13→    console.log(snap);\n    14→\n    15→`takeSnapshot` accepts an optional input object, so prefer `takeSnapshot({})`\n    16→when you do not need any options.\n    17→\n    18→`evaluateScript` expects a `function` string, and also accepts a `script`\n    19→alias for convenience.\n    20→\n    21→IMPORTANT: Do NOT use `curl`, `wget`, or WebFetch.\n    22→You must use the `./servers/chrome-devtools/` wrappers exclusively.\n    23→Write scripts in the current working directory (not /tmp) so relative\n    24→imports resolve correctly. Browser state persists across scripts.\n    25→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"f892f2a0-961e-4d5e-9918-8901425b5f04","timestamp":"2026-04-07T19:51:17.527Z"}
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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_018ozXD6Lek1r6sa2VigmAiX","type":"tool_result","content":"126-    uid=82_118 link \"structured\" description=\"Structured programming\" url=\"https://en.wikipedia.org/wiki/Structured_programming\"\n127-      uid=82_119 StaticText \"structured\"\n128:    uid=82_120 link \"Developer\" description=\"Software developer\" url=\"https://en.wikipedia.org/wiki/Software_developer\"\n129:      uid=82_121 StaticText \"Developer\"\n130-    uid=82_122 StaticText \"The Rust Team\"\n131-    uid=82_123 StaticText \"First appeared\"\n--\n386-      uid=82_347 StaticText \"at compile time\"\n387-    uid=82_348 StaticText \".\"\n388:    uid=82_349 StaticText \"Software developer Graydon Hoare created Rust in 2006 while working at \"\n389-    uid=82_350 link \"Mozilla\" url=\"https://en.wikipedia.org/wiki/Mozilla\"\n390-      uid=82_351 StaticText \"Mozilla\"\n--\n399-    uid=82_360 link \"system software\" description=\"System software\" url=\"https://en.wikipedia.org/wiki/System_software\"\n400-      uid=82_361 StaticText \"system software\"\n401:    uid=82_362 StaticText \". It has been studied academically and has a growing community of developers.\"\n402-    uid=82_363 heading \"History\" level=\"2\"\n403-    uid=82_111 StaticText \"​\"\n--\n420-    uid=82_379 link \"Mozilla\" url=\"https://en.wikipedia.org/wiki/Mozilla\"\n421-      uid=82_380 StaticText \"Mozilla\"\n422:    uid=82_381 StaticText \" employee Graydon Hoare in 2006. According to \"\n423-    uid=82_382 StaticText \"MIT Technology Review\"\n424-    uid=82_383 StaticText \", he started the project due to his frustration with a broken elevator in his apartment building whose software had crashed,\"\n--\n435-      uid=82_394 StaticText \"16\"\n436-      uid=82_395 StaticText \"]\"\n437:    uid=82_396 StaticText \" During the time period between 2006 and 2009, Rust was not publicized to others at Mozilla and was written in Hoare's free time;\"\n438-    uid=82_397 link \"[17]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Klabnik2016ACMHistory-21\"\n439-      uid=82_398 StaticText \"[\"\n--\n441-      uid=82_400 StaticText \"]\"\n442-    uid=82_401 StaticText \": 7:50 \"\n443:    uid=82_402 StaticText \" Hoare began speaking about the language around 2009 after a small group at Mozilla became interested in the project.\"\n444:    uid=82_403 link \"[18]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Hoare2010-22\"\n445-      uid=82_404 StaticText \"[\"\n446-      uid=82_405 StaticText \"18\"\n447-      uid=82_406 StaticText \"]\"\n448:    uid=82_407 StaticText \" Hoare cited languages from the 1970s, 1980s, and 1990s as influences — including \"\n449-    uid=82_408 link \"CLU\" description=\"CLU (programming language)\" url=\"https://en.wikipedia.org/wiki/CLU_(programming_language)\"\n450-      uid=82_409 StaticText \"CLU\"\n--\n482-      uid=82_441 StaticText \"Limbo\"\n483-    uid=82_442 StaticText \".\"\n484:    uid=82_443 link \"[18]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Hoare2010-22\"\n485-      uid=82_444 StaticText \"[\"\n486-      uid=82_445 StaticText \"18\"\n--\n492-      uid=82_451 StaticText \"]\"\n493-    uid=82_452 StaticText \": 8:17 \"\n494:    uid=82_453 link \"[18]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Hoare2010-22\"\n495-      uid=82_454 StaticText \"[\"\n496-      uid=82_455 StaticText \"18\"\n497-      uid=82_456 StaticText \"]\"\n498:    uid=82_457 StaticText \" Early Rust developer Manish Goregaokar similarly described Rust as being based on \"mostly decades-old research.\"\"\n499-    uid=82_458 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n500-      uid=82_459 StaticText \"[\"\n--\n557-    uid=82_515 link \"engine\" description=\"Browser engine\" url=\"https://en.wikipedia.org/wiki/Browser_engine\"\n558-      uid=82_516 StaticText \"engine\"\n559:    uid=82_517 StaticText \", placed engineers on the project including Patrick Walton, Niko Matsakis, Felix Klock, and Manish Goregaokar.\"\n560-    uid=82_518 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n561-      uid=82_519 StaticText \"[\"\n562-      uid=82_520 StaticText \"16\"\n563-      uid=82_521 StaticText \"]\"\n564:    uid=82_522 StaticText \" A conference room taken by the project developers was dubbed \"the nerd cave,\" with a sign placed outside the door.\"\n565-    uid=82_523 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n566-      uid=82_524 StaticText \"[\"\n--\n652-      uid=82_609 StaticText \"]\"\n653-    uid=82_610 StaticText \": 22:32 \"\n654:    uid=82_611 StaticText \"According to Steve Klabnik, Rust was influenced during this period by developers coming from \"\n655-    uid=82_612 link \"C++\" url=\"https://en.wikipedia.org/wiki/C%2B%2B\"\n656-      uid=82_613 StaticText \"C++\"\n--\n667-      uid=82_624 StaticText \"]\"\n668-    uid=82_625 StaticText \": 30:50 \"\n669:    uid=82_626 StaticText \"Graydon Hoare stepped down from Rust in 2013.\"\n670-    uid=82_627 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n671-      uid=82_628 StaticText \"[\"\n672-      uid=82_629 StaticText \"16\"\n673-      uid=82_630 StaticText \"]\"\n674:    uid=82_631 StaticText \" After Hoare's departure, it evolved organically under a federated governance structure, with a \"core team\" of initially six people,\"\n675-    uid=82_632 link \"[17]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Klabnik2016ACMHistory-21\"\n676-      uid=82_633 StaticText \"[\"\n--\n678-      uid=82_635 StaticText \"]\"\n679-    uid=82_636 StaticText \": 21:45 \"\n680:    uid=82_637 StaticText \" and around 30-40 developers total across various other teams.\"\n681-    uid=82_638 link \"[17]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Klabnik2016ACMHistory-21\"\n682-      uid=82_639 StaticText \"[\"\n--\n852-      uid=82_808 StaticText \"16\"\n853-      uid=82_809 StaticText \"]\"\n854:    uid=82_810 StaticText \" Engineers cited performance, lack of a garbage collector, safety, and pleasantness of working in the language as reasons for the adoption. Amazon developers cited a finding by Portuguese researchers that Rust code used \"\n855-    uid=82_811 link \"less energy\" description=\"Energy efficiency in computing\" url=\"https://en.wikipedia.org/wiki/Energy_efficiency_in_computing\"\n856-      uid=82_812 StaticText \"less energy\"\n--\n928-      uid=82_883 StaticText \"36\"\n929-      uid=82_884 StaticText \"]\"\n930:    uid=82_885 StaticText \" The foundation would provide financial support for Rust developers in the form of grants and server funding.\"\n931-    uid=82_886 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n932-      uid=82_887 StaticText \"[\"\n--\n1018-      uid=82_972 StaticText \"46\"\n1019-      uid=82_973 StaticText \"]\"\n1020:    uid=82_974 StaticText \" Hoare has described Rust as targeted at frustrated C++ developers.\"\n1021:    uid=82_975 link \"[18]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Hoare2010-22\"\n1022-      uid=82_976 StaticText \"[\"\n1023-      uid=82_977 StaticText \"18\"\n--\n4814-      uid=82_4498 StaticText \"170\"\n4815-      uid=82_4499 StaticText \"]\"\n4816:    uid=82_4500 StaticText \" In 2025, kernel developers at the \"\n4817:    uid=82_4501 link \"Linux Kernel Developers Summit\" url=\"https://en.wikipedia.org/wiki/Linux_Kernel_Developers_Summit\"\n4818:      uid=82_4502 StaticText \"Linux Kernel Developers Summit\"\n4819-    uid=82_4503 StaticText \" determined the project to be a success, and Rust usage for kernel code will no longer be considered experimental.\"\n4820-    uid=82_4504 link \"[173]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-179\"\n--\n4825-    uid=82_4509 link \"Android\" description=\"Android (operating system)\" url=\"https://en.wikipedia.org/wiki/Android_(operating_system)\"\n4826-      uid=82_4510 StaticText \"Android\"\n4827:    uid=82_4511 StaticText \" developers used Rust in 2021 to rewrite existing components.\"\n4828-    uid=82_4512 link \"[174]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-180\"\n4829-      uid=82_4513 StaticText \"[\"\n--\n4996-    uid=82_4680 link \"Meta\" description=\"Meta Platforms\" url=\"https://en.wikipedia.org/wiki/Meta_Platforms\"\n4997-      uid=82_4681 StaticText \"Meta\"\n4998:    uid=82_4682 StaticText \") used Rust to redesign its system that manages source code for internal projects.\"\n4999-    uid=82_4683 link \"[16]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-MITTechReview-20\"\n5000-      uid=82_4684 StaticText \"[\"\n--\n5004-    uid=82_4688 link \"Stack Overflow\" url=\"https://en.wikipedia.org/wiki/Stack_Overflow\"\n5005-      uid=82_4689 StaticText \"Stack Overflow\"\n5006:    uid=82_4690 StaticText \" Developer Survey, 14.8% of respondents had recently done extensive development in Rust.\"\n5007-    uid=82_4691 link \"[191]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-SO-2025-survey-197\"\n5008-      uid=82_4692 StaticText \"[\"\n5009-      uid=82_4693 StaticText \"191\"\n5010-      uid=82_4694 StaticText \"]\"\n5011:    uid=82_4695 StaticText \" The survey named Rust the \"most admired programming language\" annually from 2016 to 2025 (inclusive), as measured by the number of existing developers interested in continuing to work in the language.\"\n5012-    uid=82_4696 link \"[192]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-198\"\n5013-      uid=82_4697 StaticText \"[\"\n--\n5018-      uid=82_4702 StaticText \"note 7\"\n5019-      uid=82_4703 StaticText \"]\"\n5020:    uid=82_4704 StaticText \" In 2025, 29.2% of developers not currently working in Rust expressed an interest in doing so.\"\n5021-    uid=82_4705 link \"[191]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-SO-2025-survey-197\"\n5022-      uid=82_4706 StaticText \"[\"\n--\n5104-      uid=82_4786 StaticText \"16\"\n5105-      uid=82_4787 StaticText \"]\"\n5106:    uid=82_4788 StaticText \" Inclusiveness has been cited as an important factor for some Rust developers.\"\n5107-    uid=82_4789 link \"[140]\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_note-Nature-146\"\n5108-      uid=82_4790 StaticText \"[\"\n--\n5901-[Omitted long context line]\n5902-    uid=82_5573 StaticText \"^ \"\n5903:    uid=82_5574 link \"Jump up to: a\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_ref-Hoare2010_22-0\"\n5904-      uid=82_5575 StaticText \"Jump up to:\"\n5905-      uid=82_5576 StaticText \"a\"\n5906-    uid=82_5577 StaticText \" \"\n5907:    uid=82_5578 link \"b\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_ref-Hoare2010_22-1\"\n5908-      uid=82_5579 StaticText \"b\"\n5909-    uid=82_5580 StaticText \" \"\n5910:    uid=82_5581 link \"c\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_ref-Hoare2010_22-2\"\n5911-      uid=82_5582 StaticText \"c\"\n5912-    uid=82_5583 StaticText \" \"\n5913:    uid=82_5584 link \"d\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_ref-Hoare2010_22-3\"\n5914-      uid=82_5585 StaticText \"d\"\n5915-    uid=82_5586 StaticText \" \"\n5916:    uid=82_5587 StaticText \"Hoare, Graydon (July 2010). \"\n5917:    uid=82_5588 link \"Project Servo: Technology from the past come to save the future from itself\" url=\"http://venge.net/graydon/talks/intro-talk-2.pdf\"\n5918-      uid=82_5589 StaticText \"Project Servo: Technology from the past come to save the future from itself\"\n5919-    uid=82_5590 StaticText \" \"\n--\n5923-    uid=82_5594 StaticText \"2024-10-29\"\n5924-    uid=82_5595 StaticText \".\"\n5925:    uid=82_5596 generic description=\"ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=conference&rft.btitle=Project+Servo%3A+Technology+from+the+past+come+to+save+the+future+from+itself&rft.pub=Mozilla+Annual+Summit&rft.date=2010-07&rft.aulast=Hoare&rft.aufirst=Graydon&rft_id=http%3A%2F%2Fvenge.net%2Fgraydon%2Ftalks%2Fintro-talk-2.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ARust+%28programming+language%29\"\n5926-    uid=82_5597 link \"Jump up\" description=\"Jump up\" url=\"https://en.wikipedia.org/wiki/Rust_(programming_language)#cite_ref-OCamlCompiler_23-0\"\n5927-      uid=82_5598 StaticText \"^\"\n5928-    uid=82_5599 StaticText \" \"\n5929:    uid=82_5600 StaticText \"Hoare, Graydon (November 2016). \"\n5930:    uid=82_5601 link \"\"Rust Prehistory (Archive of the original Rust OCaml compiler source code)\"\" url=\"https://github.com/graydon/rust-prehistory/tree/master\"\n5931-      uid=82_5602 StaticText \"\"Rust Prehistory (Archive of the original Rust OCaml compiler 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{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01AnsJAAWbJQFmx31hdsiitJ","type":"tool_result","content":"Navigation result: Successfully navigated to https://www.rust-lang.org/.\n## Pages\n1: https://rust-lang.org/ [selected]\n## Latest page snapshot\nuid=84_0 RootWebArea \"Rust Programming Language\" url=\"https://rust-lang.org/\"\n  uid=84_1 navigation\n    uid=84_2 link \"Rust Logo\" url=\"https://rust-lang.org/\"\n      uid=84_3 image \"Rust Logo\" url=\"https://rust-lang.org/static/images/rust-logo-blk.svg\"\n    uid=84_4 link \"Install\" url=\"https://rust-lang.org/tools/install\"\n      uid=84_5 StaticText \"Install\"\n    uid=84_6 link \"Learn\" url=\"https://rust-lang.org/learn\"\n      uid=84_7 StaticText \"Learn\"\n    uid=84_8 link \"Playground\" url=\"https://play.rust-lang.org/\"\n      uid=84_9 StaticText \"Playground\"\n    uid=84_10 link \"Tools\" url=\"https://rust-lang.org/tools\"\n      uid=84_11 StaticText \"Tools\"\n    uid=84_12 link \"Governance\" url=\"https://rust-lang.org/governance\"\n      uid=84_13 StaticText \"Governance\"\n    uid=84_14 link \"Community\" url=\"https://rust-lang.org/community\"\n      uid=84_15 StaticText \"Community\"\n    uid=84_16 link \"Blog\" url=\"https://blog.rust-lang.org/\"\n      uid=84_17 StaticText \"Blog\"\n    uid=84_18 StaticText \"Language\"\n    uid=84_19 combobox \"Language\" expandable haspopup=\"menu\" value=\"English (en-US)\"\n      uid=84_20 option \"English (en-US)\" selectable selected value=\"English (en-US)\"\n      uid=84_21 option \"Español (es)\" selectable value=\"Español (es)\"\n      uid=84_22 option \"Français (fr)\" selectable value=\"Français (fr)\"\n      uid=84_23 option \"Italiano (it)\" selectable value=\"Italiano (it)\"\n      uid=84_24 option \"日本語 (ja)\" selectable value=\"日本語 (ja)\"\n      uid=84_25 option \"Português (pt-BR)\" selectable value=\"Português (pt-BR)\"\n      uid=84_26 option \"Русский (ru)\" selectable value=\"Русский (ru)\"\n      uid=84_27 option \"Türkçe (tr)\" selectable value=\"Türkçe (tr)\"\n      uid=84_28 option \"简体中文 (zh-CN)\" selectable value=\"简体中文 (zh-CN)\"\n      uid=84_29 option \"正體中文 (zh-TW)\" selectable value=\"正體中文 (zh-TW)\"\n  uid=84_30 main\n    uid=84_31 heading \"Rust\" level=\"1\"\n    uid=84_32 heading \"A language empowering everyone to build reliable and efficient software.\" level=\"2\"\n    uid=84_33 link \"GET STARTED\" url=\"https://rust-lang.org/learn/get-started\"\n      uid=84_34 StaticText \"GET STARTED\"\n    uid=84_35 link \"Version 1.94.1\" url=\"https://blog.rust-lang.org/releases/latest\"\n      uid=84_36 StaticText \"Version 1.94.1\"\n    uid=84_37 heading \"Why Rust?\" level=\"2\"\n    uid=84_38 heading \"Performance\" level=\"3\"\n    uid=84_39 StaticText \"Rust is blazingly fast and memory-efficient: with no runtime or garbage collector, it can power performance-critical services, run on embedded devices, and easily integrate with other languages.\"\n    uid=84_40 heading \"Reliability\" level=\"3\"\n    uid=84_41 StaticText \"Rust’s rich type system and ownership model guarantee memory-safety and thread-safety — enabling you to eliminate many classes of bugs at compile-time.\"\n    uid=84_42 heading \"Productivity\" level=\"3\"\n    uid=84_43 StaticText \"Rust has great documentation, a friendly compiler with useful error messages, and top-notch tooling — an integrated package manager and build tool, smart multi-editor support with auto-completion and type inspections, an auto-formatter, and more.\"\n    uid=84_44 heading \"Build it in Rust\" level=\"2\"\n    uid=84_45 StaticText \"In 2018, the Rust community decided to improve the programming experience for a few distinct domains (see \"\n    uid=84_46 link \"the 2018 roadmap\" url=\"https://blog.rust-lang.org/2018/03/12/roadmap.html\"\n      uid=84_47 StaticText \"the 2018 roadmap\"\n    uid=84_48 StaticText \"). For these, you can find many high-quality crates and some awesome guides on how to get started.\"\n    uid=84_49 image \"terminal\" url=\"https://rust-lang.org/static/images/cli.svg\"\n    uid=84_50 heading \"Command Line\" level=\"3\"\n    uid=84_51 StaticText \"Whip up a CLI tool quickly with Rust’s robust ecosystem. Rust helps you maintain your app with confidence and distribute it with ease.\"\n    uid=84_52 link \"BUILDING TOOLS\" url=\"https://rust-lang.org/what/cli\"\n      uid=84_53 StaticText \"BUILDING TOOLS\"\n    uid=84_54 image \"gear with puzzle piece elements\" url=\"https://rust-lang.org/static/images/webassembly.svg\"\n    uid=84_55 heading \"WebAssembly\" level=\"3\"\n    uid=84_56 StaticText \"Use Rust to supercharge your JavaScript, one module at a time. Publish to npm, bundle with webpack, and you’re off to the races.\"\n    uid=84_57 link \"WRITING WEB APPS\" url=\"https://rust-lang.org/what/wasm\"\n      uid=84_58 StaticText \"WRITING WEB APPS\"\n    uid=84_59 image \"a cloud with nodes\" url=\"https://rust-lang.org/static/images/networking.svg\"\n    uid=84_60 heading \"Networking\" level=\"3\"\n    uid=84_61 StaticText \"Predictable performance. Tiny resource footprint. Rock-solid reliability. Rust is great for network services.\"\n    uid=84_62 link \"WORKING ON SERVERS\" url=\"https://rust-lang.org/what/networking\"\n      uid=84_63 StaticText \"WORKING ON SERVERS\"\n    uid=84_64 image \"an embedded device chip\" url=\"https://rust-lang.org/static/images/embedded.svg\"\n    uid=84_65 heading \"Embedded\" level=\"3\"\n    uid=84_66 StaticText \"Targeting low-resource devices? Need low-level control without giving up high-level conveniences? Rust has you covered.\"\n    uid=84_67 link \"STARTING WITH EMBEDDED\" url=\"https://rust-lang.org/what/embedded\"\n      uid=84_68 StaticText \"STARTING WITH EMBEDDED\"\n    uid=84_69 heading \"Rust in production\" level=\"2\"\n    uid=84_70 StaticText \"Hundreds of companies around the world are using Rust in production today for fast, low-resource, cross-platform solutions. \"\n    uid=84_71 StaticText \"From startups to large corporations, from embedded devices to scalable web services, Rust is a great fit.\"\n    uid=84_72 heading \"Get involved\" level=\"2\"\n    uid=84_73 heading \"Read Rust\" level=\"3\"\n    uid=84_74 StaticText \"We love documentation! Take a look at the books available online, as well as key blog posts and user guides.\"\n    uid=84_75 link \"READ THE BOOK\" url=\"https://rust-lang.org/learn\"\n      uid=84_76 StaticText \"READ THE BOOK\"\n    uid=84_77 heading \"Watch Rust\" level=\"3\"\n    uid=84_78 StaticText \"The Rust community has a dedicated YouTube channel collecting a huge range of presentations and tutorials.\"\n    uid=84_79 link \"WATCH THE VIDEOS\" url=\"https://www.youtube.com/channel/UCaYhcUwRBNscFNUKTjgPFiA\"\n      uid=84_80 StaticText \"WATCH THE VIDEOS\"\n    uid=84_81 heading \"Contribute code\" level=\"3\"\n    uid=84_82 StaticText \"Rust is truly a community effort, and we welcome contribution from hobbyists and production users, from newcomers and seasoned professionals. Come help us make the Rust experience even better!\"\n    uid=84_83 link \"READ CONTRIBUTION GUIDE\" url=\"https://rustc-dev-guide.rust-lang.org/getting-started.html\"\n      uid=84_84 StaticText \"READ CONTRIBUTION GUIDE\"\n    uid=84_85 heading \"Thanks\" level=\"2\"\n    uid=84_86 StaticText \"Rust would not exist without the generous contributions of time, work, and resources from individuals and companies. We are very grateful for the support!\"\n    uid=84_87 heading \"Individuals\" level=\"3\"\n    uid=84_88 StaticText \"Rust is a community project and is very thankful for the many community contributions it receives.\"\n    uid=84_89 link \"SEE INDIVIDUAL CONTRIBUTORS\" url=\"https://thanks.rust-lang.org/\"\n      uid=84_90 StaticText \"SEE INDIVIDUAL CONTRIBUTORS\"\n    uid=84_91 heading \"Corporate sponsors\" level=\"3\"\n    uid=84_92 StaticText \"The Rust project receives support from companies through the Rust Foundation.\"\n    uid=84_93 link \"SEE FOUNDATION MEMBERS\" url=\"https://foundation.rust-lang.org/members\"\n      uid=84_94 StaticText \"SEE FOUNDATION MEMBERS\"\n  uid=84_95 contentinfo\n    uid=84_96 heading \"Get help!\" level=\"4\"\n    uid=84_97 link \"Documentation\" url=\"https://rust-lang.org/learn\"\n      uid=84_98 StaticText \"Documentation\"\n    uid=84_99 link \"Rust Forge (Contributor Documentation)\" url=\"http://forge.rust-lang.org/\"\n      uid=84_100 StaticText \"Rust Forge (Contributor Documentation)\"\n    uid=84_101 link \"Ask a Question on the Users Forum\" url=\"https://users.rust-lang.org/\"\n      uid=84_102 StaticText \"Ask a Question on the Users Forum\"\n    uid=84_103 StaticText \"Language\"\n    uid=84_104 combobox \"Language\" expandable haspopup=\"menu\" value=\"English (en-US)\"\n      uid=84_105 option \"English (en-US)\" selectable selected value=\"English (en-US)\"\n      uid=84_106 option \"Español (es)\" selectable value=\"Español (es)\"\n      uid=84_107 option \"Français (fr)\" selectable value=\"Français (fr)\"\n      uid=84_108 option \"Italiano (it)\" selectable value=\"Italiano (it)\"\n      uid=84_109 option \"日本語 (ja)\" selectable value=\"日本語 (ja)\"\n      uid=84_110 option \"Português (pt-BR)\" selectable value=\"Português (pt-BR)\"\n      uid=84_111 option \"Русский (ru)\" selectable value=\"Русский (ru)\"\n      uid=84_112 option \"Türkçe (tr)\" selectable value=\"Türkçe (tr)\"\n      uid=84_113 option \"简体中文 (zh-CN)\" selectable value=\"简体中文 (zh-CN)\"\n      uid=84_114 option \"正體中文 (zh-TW)\" selectable value=\"正體中文 (zh-TW)\"\n    uid=84_115 heading \"Terms and policies\" level=\"4\"\n    uid=84_116 link \"Code of Conduct\" url=\"https://rust-lang.org/policies/code-of-conduct\"\n      uid=84_117 StaticText \"Code of Conduct\"\n    uid=84_118 link \"Licenses\" url=\"https://rust-lang.org/policies/licenses\"\n      uid=84_119 StaticText \"Licenses\"\n    uid=84_120 link \"Logo Policy and Media Guide\" url=\"https://foundation.rust-lang.org/policies/logo-policy-and-media-guide/\"\n      uid=84_121 StaticText \"Logo Policy and Media Guide\"\n    uid=84_122 link \"Security Disclosures\" url=\"https://rust-lang.org/policies/security\"\n      uid=84_123 StaticText \"Security Disclosures\"\n    uid=84_124 link \"Privacy Notice\" url=\"https://foundation.rust-lang.org/policies/privacy-policy/\"\n      uid=84_125 StaticText \"Privacy Notice\"\n    uid=84_126 link \"All Policies\" url=\"https://rust-lang.org/policies\"\n      uid=84_127 StaticText \"All Policies\"\n    uid=84_128 heading \"Social\" level=\"4\"\n    uid=84_129 link \"Mastodon\" url=\"https://social.rust-lang.org/@rust\"\n      uid=84_130 image \"Mastodon\" description=\"Mastodon\" url=\"https://rust-lang.org/static/images/mastodon.svg\"\n    uid=84_131 link \"Bluesky\" url=\"https://bsky.app/profile/rust-lang.org\"\n      uid=84_132 image \"Bluesky\" description=\"Bluesky\" url=\"https://rust-lang.org/static/images/bluesky.svg\"\n    uid=84_133 link \"youtube logo\" url=\"https://www.youtube.com/channel/UCaYhcUwRBNscFNUKTjgPFiA\"\n      uid=84_134 image \"youtube logo\" description=\"YouTube\" url=\"https://rust-lang.org/static/images/youtube.svg\"\n    uid=84_135 link \"github logo\" url=\"https://github.com/rust-lang\"\n      uid=84_136 image \"github logo\" description=\"GitHub\" url=\"https://rust-lang.org/static/images/github.svg\"\n    uid=84_137 StaticText \"Maintained by the Rust Team. See a bug? \"\n    uid=84_138 link \"File an issue!\" url=\"https://github.com/rust-lang/www.rust-lang.org/issues/new/choose\"\n      uid=84_139 StaticText \"File an issue!\"\n    uid=84_140 StaticText \"Web site built every day at 22:00 UTC\"\n    uid=84_141 StaticText \"Looking for the \"\n    uid=84_142 link \"previous website\" url=\"https://prev.rust-lang.org/\"\n      uid=84_143 StaticText \"previous website\"\n    uid=84_144 StaticText \"?\"","is_error":false}]},"parent_tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"3d0f268d-3775-4ca0-b1d8-d8985f06c154","timestamp":"2026-04-07T19:52:01.405Z"}
{"type":"system","subtype":"task_notification","task_id":"a77e7a308d3d68e78","tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","status":"completed","output_file":"","summary":"Research Rust across three sites","usage":{"total_tokens":29881,"tool_uses":19,"duration_ms":74165},"uuid":"54e8f9c6-5723-4bd0-bc60-6137fc864591","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a"}
{"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01UESErt7q66wFp12MNjG42w","type":"tool_result","content":[{"type":"text","text":"All three sites have been successfully scraped. Here is the complete summary:\n\n---\n\n**Research Summary: Rust Programming Language**\n\n**Script files written and executed:**\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_wikipedia.ts`\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_github.ts`\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_rustlang.ts`\n\n---\n\n**1. Who designed Rust (Wikipedia)**\nRust was designed and created by **Graydon Hoare**, a software developer who started the project in 2006 while working as a Mozilla employee. The Wikipedia infobox lists the developer as \"The Rust Team,\" reflecting its current community-driven governance, but Hoare is the original creator. He stepped down from the project in 2013.\n\nSource text from snapshot: `\"Software developer Graydon Hoare created Rust in 2006 while working at Mozilla\"`\n\n---\n\n**2. Star count (GitHub — github.com/rust-lang/rust)**\nThe repository has **112k stars** (shown as \"112k\" in the GitHub UI star button).\n\nSource text from snapshot: `StaticText \"112k\"` adjacent to the star link.\n\n---\n\n**3. Tagline / main description (rust-lang.org)**\nThe main heading/tagline on the official Rust website is:\n\n> **\"A language empowering everyone to build reliable and efficient software.\"**\n\nSource text from snapshot: `heading \"A language empowering everyone to build reliable and efficient software.\" level=\"2\"`"},{"type":"text","text":"agentId: a77e7a308d3d68e78 (use SendMessage with to: 'a77e7a308d3d68e78' to continue this agent)\n<usage>total_tokens: 29703\ntool_uses: 19\nduration_ms: 74167</usage>"}]}]},"parent_tool_use_id":null,"session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"6d6762e0-95bc-47c8-ae16-5d482f98f065","timestamp":"2026-04-07T19:52:14.572Z","tool_use_result":{"status":"completed","prompt":"Research the Rust programming language across three sites using the Chrome DevTools browser automation tools available at ./servers/chrome-devtools/index.js. Write and run TypeScript scripts to navigate to each site and extract specific information.\n\n1. Navigate to https://en.wikipedia.org/wiki/Rust_(programming_language) — find and report who designed Rust\n2. Navigate to https://github.com/rust-lang/rust — find and report the star count\n3. Navigate to https://www.rust-lang.org/ — find and report the tagline or main description\n\nUse navigatePage and takeSnapshot from ./servers/chrome-devtools/index.js. Write scripts in the current working directory (/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace).\n\nFor each site, write a separate script file and run it with `npx tsx`. Extract the relevant text from the snapshots.\n\nReturn a summary with all three pieces of information.","agentId":"a77e7a308d3d68e78","content":[{"type":"text","text":"All three sites have been successfully scraped. Here is the complete summary:\n\n---\n\n**Research Summary: Rust Programming Language**\n\n**Script files written and executed:**\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_wikipedia.ts`\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_github.ts`\n- `/Users/kunchen/github/kunchenguid/axi/bench-browser/results/chrome-devtools-mcp-code/multi_site_research/run4/workspace/research_rustlang.ts`\n\n---\n\n**1. Who designed Rust (Wikipedia)**\nRust was designed and created by **Graydon Hoare**, a software developer who started the project in 2006 while working as a Mozilla employee. The Wikipedia infobox lists the developer as \"The Rust Team,\" reflecting its current community-driven governance, but Hoare is the original creator. He stepped down from the project in 2013.\n\nSource text from snapshot: `\"Software developer Graydon Hoare created Rust in 2006 while working at Mozilla\"`\n\n---\n\n**2. Star count (GitHub — github.com/rust-lang/rust)**\nThe repository has **112k stars** (shown as \"112k\" in the GitHub UI star button).\n\nSource text from snapshot: `StaticText \"112k\"` adjacent to the star link.\n\n---\n\n**3. Tagline / main description (rust-lang.org)**\nThe main heading/tagline on the official Rust website is:\n\n> **\"A language empowering everyone to build reliable and efficient software.\"**\n\nSource text from snapshot: `heading \"A language empowering everyone to build reliable and efficient software.\" level=\"2\"`"}],"totalDurationMs":74167,"totalTokens":29703,"totalToolUseCount":19,"usage":{"input_tokens":1,"cache_creation_input_tokens":4781,"cache_read_input_tokens":24463,"output_tokens":458,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":0,"ephemeral_5m_input_tokens":4781},"inference_geo":"","iterations":[],"speed":"standard"}}}
{"type":"assistant","message":{"model":"claude-sonnet-4-6","id":"msg_01XH7KA5AmjRMBwjonUhhDRC","type":"message","role":"assistant","content":[{"type":"text","text":"Here's what I found across all three sites:\n\n---\n\n**1. Wikipedia** — Who designed Rust\nRust was created by **Graydon Hoare** in 2006 while working at Mozilla. The project is now maintained by \"The Rust Team.\"\n\n**2. GitHub** (`github.com/rust-lang/rust`) — Star count\nThe repository has **112k stars**.\n\n**3. rust-lang.org** — Tagline\n> *\"A language empowering everyone to build reliable and efficient software.\"*"}],"stop_reason":null,"stop_sequence":null,"stop_details":null,"usage":{"input_tokens":1,"cache_creation_input_tokens":899,"cache_read_input_tokens":15966,"cache_creation":{"ephemeral_5m_input_tokens":0,"ephemeral_1h_input_tokens":899},"output_tokens":1,"service_tier":"standard","inference_geo":"not_available"},"context_management":null},"parent_tool_use_id":null,"session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","uuid":"7d00d70e-5d74-41e0-bf7c-d378acf23afd"}
{"type":"result","subtype":"success","is_error":false,"duration_ms":83817,"duration_api_ms":79984,"num_turns":2,"result":"Here's what I found across all three sites:\n\n---\n\n**1. Wikipedia** — Who designed Rust\nRust was created by **Graydon Hoare** in 2006 while working at Mozilla. The project is now maintained by \"The Rust Team.\"\n\n**2. GitHub** (`github.com/rust-lang/rust`) — Star count\nThe repository has **112k stars**.\n\n**3. rust-lang.org** — Tagline\n> *\"A language empowering everyone to build reliable and efficient software.\"*","stop_reason":"end_turn","session_id":"30dc831c-6c98-4fbb-8c46-99b41690f92a","total_cost_usd":0.25564394999999995,"usage":{"input_tokens":3,"cache_creation_input_tokens":8420,"cache_read_input_tokens":24411,"output_tokens":483,"server_tool_use":{"web_search_requests":0,"web_fetch_requests":0},"service_tier":"standard","cache_creation":{"ephemeral_1h_input_tokens":8420,"ephemeral_5m_input_tokens":0},"inference_geo":"","iterations":[],"speed":"standard"},"modelUsage":{"claude-sonnet-4-6":{"inputTokens":19,"outputTokens":3835,"cacheReadInputTokens":243769,"cacheCreationInputTokens":33315,"webSearchRequests":0,"costUSD":0.25564394999999995,"contextWindow":200000,"maxOutputTokens":32000}},"permission_denials":[],"fast_mode_state":"off","uuid":"9465d6d4-189a-45fa-a4f9-dab5b439cd82"}
