chrome-mcp-troubleshooting SKILL.md skillA
chrome-mcp-troubleshooting from trailofbits/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add trailofbits/skills/chrome-mcp-troubleshooting@git:20261009.b9b8814Pins git:20261009.b9b8814 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- trailofbits/skills
- Path
plugins/chrome-mcp-troubleshooting/skills/chrome-mcp-troubleshooting/SKILL.md- Versions recorded
- 1
- Latest version
- git:20261009.b9b8814, committed Oct 9, 2026
- Size
- 10,274 bytes
- Repository stars
- 7,698
- License
- CC-BY-SA-4.0
Diagnose and fix Claude in Chrome MCP extension connectivity issues. Use when mcp__claude-in-chrome__* tools fail, return "Browser extension is not connected", or behave erratically.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Claude in Chrome MCP Troubleshooting Use this skill when Claude in Chrome MCP tools fail to connect or work unreliably. ## When to Use - `mcp__claude-in-chrome__*` tools fail with "Browser extension is not connected" - Browser automation works erratically or times out - After updating Claude Code or Claude.app - When switching between Claude Code CLI and Claude.app (Cowork) - Native host process is running but MCP tools still fail ## When NOT to Use - **Linux or Windows users** - This skill covers macOS-specific paths and tools (`~/Library/Application Support/`, `osascript`) - General Chrome automation issues unrelated to the Claude extension - Claude.app desktop issues (not browser-related) - Network connectivity problems - Chrome extension installation issues (use Chrome Web Store support) ## The Claude.app vs Claude Code Conflict (Primary Issue) **Background:** When Claude.app added Cowork support (browser automation from the desktop app), it introduced a competing native messaging host that conflicts with Claude Code CLI. ### Two Native Hosts, Two Socket Formats | Component | Native Host Binary | Socket Location | |-----------|-------------------|-----------------| …
Read the whole file at its exact version.
How to install
mdr add trailofbits/skills/chrome-mcp-troubleshooting@sha256:1456ace18266e816The line at the top of this page pins the label git:20261009.b9b8814, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_umh5kxcn4bdfauqm)
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Versions
The registry has recorded 1 version of this file, committed on Oct 9, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (10274 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
trailofbits/skills · 7,698 stars · license CC-BY-SA-4.0 · pushed 2026-10-22 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_umh5kxcn4bdfauqm GET https://markdownregistry.com/api/v1/resolve?ref=trailofbits/skills/chrome-mcp-troubleshooting GET https://markdownregistry.com/api/v1/blob/1456ace18266e81691c6ba0e5f3ec11df4a51cfa3e50eb511a113f15ab080c68
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.