Claude in Chrome MCP Troubleshooting
trailofbits/skills
Diagnoses why the Claude in Chrome MCP tools report the browser extension as not connected, with macOS-specific checks and a fix for the Claude.app native host conflict.
Complete plugin development workflow: build, test, icon, troubleshoot, and setup.
Install Build Plugin
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install opentabs-dev/opentabs build-plugin --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/build-plugin .claude/skills/build-plugin && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .claude/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-pluginType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install opentabs-dev/opentabs build-plugin --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/build-plugin .agents/skills/build-plugin && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .agents/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install opentabs-dev/opentabs build-plugin --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/build-plugin .cursor/skills/build-plugin && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .cursor/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/opentabs-dev/opentabs.git --path .agents/skills/build-plugin--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install opentabs-dev/opentabs build-plugin --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/build-plugin .gemini/skills/build-plugin && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .gemini/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install opentabs-dev/opentabs build-pluginInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/build-plugin .github/skills/build-plugin && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .github/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add opentabs-dev/opentabs --skill build-plugin -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install opentabs-dev/opentabs build-plugin --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/opentabs-dev/opentabs.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/build-plugin .opencode/skills/build-plugin && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "build-plugin" agent skill from https://github.com/opentabs-dev/opentabs/tree/main/.agents/skills/build-plugin into .opencode/skills/build-plugin/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "build-plugin", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
build-plugin- GitHub stars
- 967
- Token cost
- ~190 tokens
- SKILL.md length
- 59 words
- Files
- 3
- Skills in repo
- 3
- Repo updated
- First seen
- Licence
- MIT
At a glance
Complete plugin development workflow: build, test, icon, troubleshoot, and setup.
- The user wants to build a plugin
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
- Create a plugin
- Troubleshoot issues
What it does
Build Plugin is an agent skill from opentabs-dev/opentabs. Complete plugin development workflow: build, test, icon, troubleshoot, and setup. Use when the user wants to build a plugin, create a plugin, troubleshoot issues, add icons, or install/configure plugins. Triggers on: build plugin, create plugin, develop plugin, new plugin, plugin icon, troubleshoot, debug, setup plugin, install plugin.
Its SKILL.md is about 190 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files (for example `CLAUDE.md` and `__SKILL__.md`).
It sits in Agent Workflows, covering Hooks and plugins and Browser automation. It works with Model Context Protocol, TypeScript and Chrome Extensions. The repository describes itself as: Browser automation clicks buttons. OpenTabs calls APIs. The licence is MIT.
When your agent uses it
- The user wants to build a plugin
- Create a plugin
- Troubleshoot issues
- Install/configure plugins
Example prompts
- “/build-plugin”
What it can do on your machine
Read from SKILL.md and the folder at commit de9200b. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md.
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Build Plugin loads about 190 tokens when it runs. Until then it costs about 88 tokens; SKILL.md has 59 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
The full file from opentabs-dev/opentabs at commit de9200b, republished under its MIT licence (© opentabs-dev). 59 words, ~190 tokens.
Download SKILL.mdSave it as
.claude/skills/build-plugin/SKILL.md (or your agent's skills folder). This skill also uses 2 other files; get the full folder from GitHub.- name
- build-plugin
- description
- Complete plugin development workflow: build, test, icon, troubleshoot, and setup. Use when the user wants to build a plugin, create a plugin, troubleshoot issues, add icons, or install/configure plugins. Triggers on: build plugin, create plugin, develop plugin, new plugin, plugin icon, troubleshoot, debug, setup plugin, install plugin.
IMPORTANT: This file is a stub. The actual skill content is maintained in __SKILL__.md in this same directory.
Before proceeding, you MUST read the file .Codex/skills/build-plugin/__SKILL__.md for the latest skill instructions. The content is kept separate so that updates to the skill are always picked up fresh, even if this stub was cached at the start of a session.
© opentabs-dev, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
SKILL.md and 2 other files in .agents/skills/build-plugin of opentabs-dev/opentabs.
- SKILL.md
- CLAUDE.md
- __SKILL__.md
Open the folder on GitHubat commit de9200b
Compare with similar skills
Build Plugin next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Build Plugin this skillopentabs-dev/opentabs | 967 | — | ~190 | Automated safety check: Pass | MIT | |
| Claude in Chrome MCP Troubleshootingtrailofbits/skills | 7.4k | 3 repos | ~2.6k | Automated safety check: Pass | CC-BY-SA-4.0 | |
| OpenpetsOpenPetsHQ/openpets | 1.3k | — | ~2.1k | Automated safety check: Pass | MIT | |
| Spec Driven Developzhu1090093659/deepseek-pp | 1.9k | — | ~6.9k | Automated safety check: Pass | Apache-2.0 | |
| Project Releaseswimmwatch/cloakbrowser-mcp | 161 | — | ~1.9k | Automated safety check: Pass | MIT | |
| Project Pull Requestswimmwatch/cloakbrowser-mcp | 161 | — | ~1k | Automated safety check: Pass | MIT |
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Project Release
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Project Pull Request
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Create, update, prepare, or review a cloakbrowser-mcp GitHub Pull Request only when the user explicitly requests PR work.
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Related
Categories
Questions about Build Plugin
What does Build Plugin do?
Complete plugin development workflow: build, test, icon, troubleshoot, and setup. Build Plugin is an agent skill from opentabs-dev/opentabs. Complete plugin development workflow: build, test, icon, troubleshoot, and setup.
When should I use Build Plugin?
Build Plugin fits situations like: the user wants to build a plugin; create a plugin; troubleshoot issues; install/configure plugins.
How do I install Build Plugin in Claude Code?
Run `npx skills add opentabs-dev/opentabs --skill build-plugin -a claude-code`. Or copy the skill folder (.agents/skills/build-plugin in opentabs-dev/opentabs) into .claude/skills/build-plugin in your project. Claude Code loads it when a task matches its description.
How do I install Build Plugin in Codex?
Run `npx skills add opentabs-dev/opentabs --skill build-plugin -a codex`. Or copy the skill folder (.agents/skills/build-plugin in opentabs-dev/opentabs) into .agents/skills/build-plugin in your project. Codex loads it when a task matches its description.
Can I use Build Plugin in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add opentabs-dev/opentabs --skill build-plugin -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/build-plugin, .gemini/skills/build-plugin, .github/skills/build-plugin and .opencode/skills/build-plugin in your project.
What does Build Plugin need to run?
SKILL.md names no scripts, command-line tools or credentials: Build Plugin is instructions for the agent only.
Does Build Plugin access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Build Plugin safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Build Plugin use?
Build Plugin is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Build Plugin use?
About 190 tokens (SKILL.md is roughly 760 characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.
What are the alternatives to Build Plugin?
Skills that share tags, products or a category with Build Plugin: Claude in Chrome MCP Troubleshooting (trailofbits/skills, 7.4k stars), Openpets (OpenPetsHQ/openpets, 1.3k stars), Spec Driven Develop (zhu1090093659/deepseek-pp, 1.9k stars) and Project Release (swimmwatch/cloakbrowser-mcp, 161 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Build Plugin?
opentabs-dev (a GitHub user) maintains it in opentabs-dev/opentabs, which has 967 GitHub stars. The repository holds 3 skills in this directory. The repository was last updated on October 3, 2026.
Source: opentabs-dev/opentabs on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.