{
  "slug": "chrome-devtools-mcp-get-css-styles-formats-css-rules-for-debugging-21389e7a2963",
  "title": "chrome-devtools-mcp get_css_styles formats CSS rules for debugging",
  "tools": [
    "chrome-devtools-mcp"
  ],
  "tags": [
    "agent"
  ],
  "introduced_at": "2026-09-23T09:52:30.000Z",
  "announced_at": "2026-09-23T09:52:30.000Z",
  "effective_at": null,
  "date_basis": "source-publication",
  "status": "unknown",
  "how": {
    "incantation": "When debugging why an element’s styles apply, are overridden, or conflict, get its UID from `take_snapshot`, then call `get_css_styles` with the page ID and UID. Page through results with `pageIdx`; each page returns 10 rules by default.",
    "examples": [
      "chrome-devtools get_css_styles <pageId> \"<uid>\"",
      "chrome-devtools get_css_styles <pageId> \"<uid>\" --pageSize 20 --pageIdx 0"
    ],
    "gotchas": [
      "Version: 1.10.0",
      "pageId (required): Targets a specific page by ID.",
      "uid (required): Snapshot element UID to inspect.",
      "pageIdx: Zero-based result page; defaults to 0.",
      "pageSize: Maximum rules per page; defaults to 10.",
      "Prerequisite: A UID from `take_snapshot` is required.",
      "Requires a UID from `take_snapshot`.",
      "Returns 10 rules per page by default; `pageIdx` is 0-based and defaults to 0 (the first page)."
    ]
  },
  "why_it_matters": "Inspect matched, inherited, or pseudo-element CSS rules for an element while debugging why its styles apply or conflict.",
  "sources": [
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/releases/tag/chrome-devtools-mcp-v1.10.0",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2707",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2612",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2799",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2717",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2715",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2713",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2716",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/pull/2718",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/chrome-devtools-mcp-v1.10.0/skills/chrome-devtools-cli/SKILL.md",
    "https://github.com/ChromeDevTools/chrome-devtools-mcp/blob/chrome-devtools-mcp-v1.10.0/docs/tool-reference.md"
  ],
  "rank": 0.95047,
  "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-bbef5e4906e2ddf2-0:gate",
    "evidence_hash": "f8e7f9b38024c4568d58d8cb3a068f5727073812cab921ba945fb49ae8bc7dcd"
  },
  "review": {
    "draft_hash": "0224ae5a218ac05133b25d29a948379a72e98bc2c2cfcf5c631745b6487fb8fc",
    "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 0.95 >= 0.9; 2 needed) and Jev gave 0.77 (>= 0.6 needed)."
  }
}