Hook Development for Claude Code Plugins
anthropics/claude-plugins-official
Explains how to write Claude Code plugin hooks, both prompt-based checks and bash commands, for events such as PreToolUse, Stop and SessionStart.
Review files or folders in the PM Brain repo for quality, freshness, consistency, and system health.
Install Brain Review
$ npx skills add andreaskelm/pm-brain --skill brain-review -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install andreaskelm/pm-brain brain-review --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/andreaskelm/pm-brain.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.claude/skills/brain-review .claude/skills/brain-review && 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 "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .claude/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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/andreaskelm/pm-brain/tree/main/.claude/skills/brain-reviewType 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 andreaskelm/pm-brain --skill brain-review -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install andreaskelm/pm-brain brain-review --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/andreaskelm/pm-brain.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.claude/skills/brain-review .agents/skills/brain-review && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .agents/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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 andreaskelm/pm-brain --skill brain-review -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install andreaskelm/pm-brain brain-review --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/andreaskelm/pm-brain.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.claude/skills/brain-review .cursor/skills/brain-review && 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 "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .cursor/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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/andreaskelm/pm-brain.git --path .claude/skills/brain-review--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 andreaskelm/pm-brain --skill brain-review -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install andreaskelm/pm-brain brain-review --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/andreaskelm/pm-brain.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.claude/skills/brain-review .gemini/skills/brain-review && 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 "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .gemini/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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 andreaskelm/pm-brain brain-reviewInstalls 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 andreaskelm/pm-brain --skill brain-review -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/andreaskelm/pm-brain.git skills-src && mkdir -p .github/skills && cp -r skills-src/.claude/skills/brain-review .github/skills/brain-review && 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 "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .github/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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 andreaskelm/pm-brain --skill brain-review -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install andreaskelm/pm-brain brain-review --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/andreaskelm/pm-brain.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.claude/skills/brain-review .opencode/skills/brain-review && 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 "brain-review" agent skill from https://github.com/andreaskelm/pm-brain/tree/main/.claude/skills/brain-review into .opencode/skills/brain-review/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "brain-review", 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
brain-review- GitHub stars
- 234
- Token cost
- ~986 tokens
- SKILL.md length
- 442 words
- Files
- 1
- Skills in repo
- 18
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Review files or folders in the PM Brain repo for quality, freshness, consistency, and system health.
- Works in 4 steps: Scope → Review types (pick what fits) → Output → …
- Explicitly asks for a repo review
- SKILL.md covers Step 1 — Scope, Step 2 — Review types (pick…, Step 3 — Output and Step 4 — Capture routing…, plus 2 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Brain Review is an agent skill from andreaskelm/pm-brain. Review files or folders in the PM Brain repo for quality, freshness, consistency, and system health. Slash-command style — invoke when the user explicitly asks for a repo review, context health check, or alignment pass on an initiative folder. Not for auto-invocation on casual chat.
Its SKILL.md is about 990 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.
It sits in Agent Workflows, covering Hooks and plugins. The repository describes itself as: AI-powered product management thinking & operating system. Playbooks, guides, templates, and frameworks that bridge PM theory to daily execution.
When your agent uses it
- Explicitly asks for a repo review
- Context health check
- Alignment pass on an initiative folder
Example prompts
- “/brain-review”
Workflow steps
4 steps, taken from the step headings in SKILL.md.
- Scope
- Review types (pick what fits)
- Output
- Capture routing (before close)
What it can do on your machine
Read from SKILL.md and the folder at commit 38696ac. 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
Brain Review loads about 986 tokens when it runs. Until then it costs about 74 tokens; SKILL.md has 442 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
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 442 words (~986 tokens).
“Structured pass over what's on disk — not the conversation you just had (that's evaluate-artifact). Use when they want to know if an avatar, initiative folder, context cluster, or PM Brain setup is still true, good, and aligned.”
- name
- brain-review
- disable-model-invocation
- true
Files
Just SKILL.md in .claude/skills/brain-review of andreaskelm/pm-brain.
Open the folder on GitHubat commit 38696ac
Compare with similar skills
Brain Review 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 |
|---|---|---|---|---|---|---|
| Brain Review this skillandreaskelm/pm-brain | 234 | — | ~986 | Automated safety check: Pass | Custom licence | |
| Hook Development for Claude Code Pluginsanthropics/claude-plugins-official | 38k | 10 repos | ~4.1k | Automated safety check: Notes | Apache-2.0 | |
| Claude Code Agent Developmentanthropics/claude-plugins-official | 38k | 7 repos | ~2.8k | Automated safety check: Pass | Apache-2.0 | |
| Claude Code Skill Developer Guidediet103/claude-code-infrastructure-showcase | 10k | 11 repos | ~3.5k | Automated safety check: Pass | MIT | |
| Plugin Settings Patternanthropics/claude-plugins-official | 38k | 7 repos | ~3k | Automated safety check: Pass | Apache-2.0 | |
| MCP Integration for Pluginsanthropics/claude-plugins-official | 38k | 11 repos | ~3.1k | Automated safety check: Pass | Apache-2.0 |
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Categories
Questions about Brain Review
What does Brain Review do?
Review files or folders in the PM Brain repo for quality, freshness, consistency, and system health. Brain Review is an agent skill from andreaskelm/pm-brain. Review files or folders in the PM Brain repo for quality, freshness, consistency, and system health.
When should I use Brain Review?
Brain Review fits situations like: explicitly asks for a repo review; context health check; alignment pass on an initiative folder.
How do I install Brain Review in Claude Code?
Run `npx skills add andreaskelm/pm-brain --skill brain-review -a claude-code`. Or copy the skill folder (.claude/skills/brain-review in andreaskelm/pm-brain) into .claude/skills/brain-review in your project. Claude Code loads it when a task matches its description.
How do I install Brain Review in Codex?
Run `npx skills add andreaskelm/pm-brain --skill brain-review -a codex`. Or copy the skill folder (.claude/skills/brain-review in andreaskelm/pm-brain) into .agents/skills/brain-review in your project. Codex loads it when a task matches its description.
Can I use Brain Review 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 andreaskelm/pm-brain --skill brain-review -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/brain-review, .gemini/skills/brain-review, .github/skills/brain-review and .opencode/skills/brain-review in your project.
What does Brain Review need to run?
SKILL.md names no scripts, command-line tools or credentials: Brain Review is instructions for the agent only.
Does Brain Review 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 Brain Review 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 Brain Review use?
Brain Review has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Brain Review use?
About 986 tokens (SKILL.md is roughly 3.9k 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 Brain Review?
Skills that share tags, products or a category with Brain Review: Hook Development for Claude Code Plugins (anthropics/claude-plugins-official, 38k stars), Claude Code Agent Development (anthropics/claude-plugins-official, 38k stars), Claude Code Skill Developer Guide (diet103/claude-code-infrastructure-showcase, 10k stars) and Plugin Settings Pattern (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Brain Review?
andreaskelm (a GitHub user) maintains it in andreaskelm/pm-brain, which has 234 GitHub stars. The repository holds 18 skills in this directory. The repository was last updated on October 9, 2026.
Source: andreaskelm/pm-brain on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.