{
  "slug": "chrome-devtools-mcp-adds-experimental-screencast-recording-tools-0515f8b21bdd",
  "title": "chrome-devtools-mcp adds experimental screencast recording tools",
  "tools": [
    "chrome-devtools-mcp"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-02-25T06:57:30.000Z",
  "announced_at": "2026-02-25T06:57:30.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When recording a page during debugging, start chrome-devtools-mcp with `--experimentalScreencast` enabled and ffmpeg available on the server PATH. Call `screencast_start` with optional `path`, then `screencast_stop`; the stop response reports the saved path.",
    "examples": [
      "Start the MCP server with `--experimentalScreencast`, then call `screencast_start` with `{ \"path\": \"<output>.mp4\" }` and `screencast_stop` with `{}`."
    ],
    "gotchas": [
      "Version: 0.18.0",
      "Availability: Experimental; enabled only when the `--experimental-screencast` command line option is provided.",
      "Requires Install ffmpeg and ensure it is available in the MCP server PATH.",
      "--experimentalScreencast / --experimental-screencast: Boolean server option; exposes the experimental screencast tools. Default is false.",
      "screencast_start.path: Output path; when omitted, a unique temporary path is generated. v0.18.0 records in MP4 format.",
      "screencast_stop parameters: No parameters.",
      "Prerequisite: Install ffmpeg and ensure it is available in the MCP server PATH.",
      "Recording is saved in mp4 format.",
      "If no `path` is provided, a temporary file with the correct extension is created.",
      "Requires ffmpeg; an error is reported if ffmpeg is not installed.",
      "Docs conflict: The current tool reference and current source use `filePath` and describe WebM support, while v0.18.0 source uses `path` and MP4. The v0.18.0 source was used for the version-specific tool parameters."
    ]
  },
  "why_it_matters": "When recording a page during browser debugging, enable the experimental screencast tools and capture then save the recording.",
  "sources": [
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/releases/tag/chrome-devtools-mcp-v0.18.0",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/941",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/chrome-devtools-mcp-v0.18.0/src/tools/screencast.ts",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/main/docs/configuration.md"
  ],
  "rank": 0.97028,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v1+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "ghtools-20261008",
    "verdict_id": "ghtools-20261008:ghtools-20261008-210ebd676b9d5d8d-2:gate",
    "evidence_hash": "602c00b324f7e66839d16778d091c262c4ee70e978047a91d5991c04e5cd2691"
  },
  "review": {
    "draft_hash": "3ca0e43098007713517d21edbf65b637b21b8158be78a266a76e789ce5442287",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "ghtools-20261008:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.97 >= 0.9; 2 needed) and Jev gave 0.76 (>= 0.6 needed)."
  }
}