{
  "slug": "agent-browser-records-browser-sessions-to-webm-21141d6bbc83",
  "title": "agent-browser records browser sessions to WebM",
  "tools": [
    "agent-browser"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-01-23T21:26:33.000Z",
  "announced_at": "2026-01-23T21:26:33.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When capturing a demo, open the application, start a WebM recording, perform the browser actions, then stop the recording to save it.",
    "examples": [
      "agent-browser open <app-url>\nagent-browser record start ./demo.webm\nagent-browser click <selector>\nagent-browser record stop"
    ],
    "gotchas": [
      "Version: v0.6.0",
      "<app-url> (required): URL to open before recording.",
      "./demo.webm (required): Output path; recording documentation requires a filename extension.",
      "<selector> (required): Element selector for the click action; refs such as @e1 are supported.",
      "Prerequisite: Install agent-browser and its Chromium browser with `npm install -g agent-browser` and `agent-browser install`.",
      "Prerequisite: The recording reference requires ffmpeg on PATH with libvpx and libx264 encoders; this requirement appears in current documentation, not the v0.6.0 release note.",
      "Recording uses Playwright's native recording.",
      "Docs conflict: The v0.6.0 release note says recording uses Playwright's native recording; current official recording docs describe piping frames to ffmpeg. The current implementation detail conflicts with the release note and is not used as a card fact."
    ]
  },
  "why_it_matters": "Record a browser session while capturing a demo of a web application.",
  "sources": [
    "https://github.com/vercel-labs/agent-browser/releases/tag/v0.6.0",
    "https://github.com/vercel-labs/agent-browser/blob/v0.6.0/README.md",
    "https://github.com/vercel-labs/agent-browser/blob/main/skill-data/core/references/video-recording.md"
  ],
  "rank": 0.93019,
  "judge": {
    "publish": true,
    "judge_model": "codex-cli/gpt-6-luna+typesafe/jev-1.13.0",
    "prompt_version": "extract-v7+enrich-v2+judge-v2x3+jev-publish-v1"
  },
  "review_state": "approved",
  "provenance": {
    "run_id": "wave2a-20261017",
    "verdict_id": "wave2a-20261017:wave2a-20261017-4d40486d947a559b-0:gate",
    "evidence_hash": "9531086d87ee94f9495a53215b8e64f11ca1d93be2a0ee37d8f6c5980236f698"
  },
  "review": {
    "draft_hash": "b4a9b1b5ce67cf638a99268d5d8d70f787d2a32d149f0f4feec8e834e4b03c91",
    "reviewer": "publication-gate",
    "reviewed_at": "2026-10-07T00:00:00.000Z",
    "decision": "wave2a-20261017:gate",
    "reason": "3 of 3 judge runs approved with p_yes >= 0.9 (mean 0.93 >= 0.9; 2 needed) and Jev gave 0.77 (>= 0.6 needed)."
  }
}