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.
OpenLoomi × Claude Code hooks installer. An agent skill from melandlabs/openloomi.
Install Openloomi Hooks
$ npx skills add melandlabs/openloomi --skill openloomi-hooks -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install melandlabs/openloomi openloomi-hooks --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/melandlabs/openloomi.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .claude/skills/openloomi-hooks && 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 "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .claude/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooksType 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 melandlabs/openloomi --skill openloomi-hooks -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install melandlabs/openloomi openloomi-hooks --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/melandlabs/openloomi.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .agents/skills/openloomi-hooks && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .agents/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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 melandlabs/openloomi --skill openloomi-hooks -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install melandlabs/openloomi openloomi-hooks --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/melandlabs/openloomi.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .cursor/skills/openloomi-hooks && 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 "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .cursor/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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/melandlabs/openloomi.git --path plugins/claude/skills/openloomi-hooks--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 melandlabs/openloomi --skill openloomi-hooks -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install melandlabs/openloomi openloomi-hooks --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/melandlabs/openloomi.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .gemini/skills/openloomi-hooks && 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 "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .gemini/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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 melandlabs/openloomi openloomi-hooksInstalls 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 melandlabs/openloomi --skill openloomi-hooks -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/melandlabs/openloomi.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .github/skills/openloomi-hooks && 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 "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .github/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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 melandlabs/openloomi --skill openloomi-hooks -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install melandlabs/openloomi openloomi-hooks --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/melandlabs/openloomi.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/claude/skills/openloomi-hooks .opencode/skills/openloomi-hooks && 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 "openloomi-hooks" agent skill from https://github.com/melandlabs/openloomi/tree/main/plugins/claude/skills/openloomi-hooks into .opencode/skills/openloomi-hooks/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "openloomi-hooks", 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
openloomi-hooks- GitHub stars
- 1k
- Token cost
- ~525 tokens
- SKILL.md length
- 167 words
- Files
- 1
- Skills in repo
- 23
- Repo updated
- First seen
- Licence
- Apache-2.0
At a glance
OpenLoomi × Claude Code hooks installer. An agent skill from melandlabs/openloomi.
- The user wants Claude Codes lifecycle (SessionStart
- SKILL.md covers Safety guarantees and Suggested user prompt
- Calls node
- UserPromptSubmit
What it does
Openloomi Hooks is an agent skill from melandlabs/openloomi. OpenLoomi × Claude Code hooks installer. Use when the user wants Claude Code's lifecycle (SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, Stop, SubagentStart, SubagentStop, Notification) to mirror onto the Loomi Pet, or wants to auto-archive every Stop into OpenLoomi memory. Triggers: install hooks, /openloomi:hooks, hooks install, hooks uninstall, hooks status, mirror claude on pet, auto-archive stop.
Its SKILL.md is about 530 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: OpenLoomi is an open-source AI coworker. It connects your work tools, understands what you’re working on, and tells you what needs your attention, why it matters, and what to do… The licence is Apache-2.0.
When your agent uses it
- The user wants Claude Codes lifecycle (SessionStart
- UserPromptSubmit
- Notification) to mirror onto the Loomi Pet
- Wants to auto-archive every Stop into OpenLoomi memory
Example prompts
- “/openloomi-hooks”
Requirements
- Pre-approved tools (allowed-tools): Bash(node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs *)
What it can do on your machine
Read from SKILL.md and the folder at commit 2aca101. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
Bash(node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs *)
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
node
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
Openloomi Hooks loads about 525 tokens when it runs. Until then it costs about 108 tokens; SKILL.md has 167 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 melandlabs/openloomi at commit 2aca101, republished under its Apache-2.0 licence (© melandlabs). 167 words, ~525 tokens.
Download SKILL.mdSave it as
.claude/skills/openloomi-hooks/SKILL.md (or your agent's skills folder).- name
- openloomi-hooks
- description
- OpenLoomi × Claude Code hooks installer. Use when the user wants Claude Code's lifecycle (SessionStart, UserPromptSubmit, PreToolUse, PostToolUse, Stop, SubagentStart, SubagentStop, Notification) to mirror onto the Loomi Pet, or wants to auto-archive every Stop into OpenLoomi memory. Triggers: install hooks, /openloomi:hooks, hooks install, hooks uninstall, hooks status, mirror claude on pet, auto-archive stop.
- allowed-tools
- Bash(node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs *)
OpenLoomi Hooks Sub-skill
The plugin ships a hook bundle in hooks/hooks.json but never installs it
automatically. Users must explicitly run one of:
/openloomi:hooks install— merge the bundle into~/.claude/settings.json/openloomi:hooks uninstall— strip only the plugin's block (other plugins' hooks are preserved)/openloomi:hooks status— report whether the bundle is currently active
Under the hood this calls:
node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs install-hooks
node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs uninstall-hooks
node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs hooks-statusSafety guarantees
install-hooksis merge-no-overwrite: only adds the plugin's block underhooks.__openloomi_claude_plugin_hooks__. Existing hooks for other plugins are not touched.uninstall-hooksremoves only the plugin-marked block; rerunning it after the first time reportsremoved: false, never deletes anything else's hooks.- The merge is atomic (
writeFileto a temp file, thenrename). - The Stop hook always exits 0 — archive failures are reported as
JSON
{continue: true, _openloomi: {archive: "skipped", reason: ...}}so they can never block Claude Code's response stream.
Suggested user prompt
This plugin can mirror Claude Code's lifecycle onto your Loomi Pet. To enable this, run
/openloomi:hooks install. To disable, run/openloomi:hooks uninstall. The plugin never modifies your~/.claude/settings.jsonwithout explicit consent.
© melandlabs, Apache-2.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file
Files
Just SKILL.md in plugins/claude/skills/openloomi-hooks of melandlabs/openloomi.
Open the folder on GitHubat commit 2aca101
Compare with similar skills
Openloomi Hooks 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 |
|---|---|---|---|---|---|---|
| Openloomi Hooks this skillmelandlabs/openloomi | 1k | — | ~525 | Automated safety check: Pass | Apache-2.0 | |
| 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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Explains how to write agents for Claude Code plugins: the markdown file with YAML frontmatter, trigger descriptions, model and color settings, and system prompt design.
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- Official
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Questions about Openloomi Hooks
What does Openloomi Hooks do?
OpenLoomi × Claude Code hooks installer. An agent skill from melandlabs/openloomi. Openloomi Hooks is an agent skill from melandlabs/openloomi. OpenLoomi × Claude Code hooks installer.
When should I use Openloomi Hooks?
Openloomi Hooks fits situations like: the user wants Claude Codes lifecycle (SessionStart; userPromptSubmit; notification) to mirror onto the Loomi Pet; wants to auto-archive every Stop into OpenLoomi memory.
How do I install Openloomi Hooks in Claude Code?
Run `npx skills add melandlabs/openloomi --skill openloomi-hooks -a claude-code`. Or copy the skill folder (plugins/claude/skills/openloomi-hooks in melandlabs/openloomi) into .claude/skills/openloomi-hooks in your project. Claude Code loads it when a task matches its description.
How do I install Openloomi Hooks in Codex?
Run `npx skills add melandlabs/openloomi --skill openloomi-hooks -a codex`. Or copy the skill folder (plugins/claude/skills/openloomi-hooks in melandlabs/openloomi) into .agents/skills/openloomi-hooks in your project. Codex loads it when a task matches its description.
Can I use Openloomi Hooks 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 melandlabs/openloomi --skill openloomi-hooks -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/openloomi-hooks, .gemini/skills/openloomi-hooks, .github/skills/openloomi-hooks and .opencode/skills/openloomi-hooks in your project.
What does Openloomi Hooks need to run?
Going by SKILL.md and its folder, Openloomi Hooks needs the command-line tools its instructions call (node). Its frontmatter pre-approves these tools: Bash(node ${CLAUDE_PLUGIN_ROOT}/scripts/loomi-bridge.mjs *).
Does Openloomi Hooks 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 Openloomi Hooks 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 Openloomi Hooks use?
Openloomi Hooks is published under the Apache-2.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.
How many tokens does Openloomi Hooks use?
About 525 tokens (SKILL.md is roughly 2.1k 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 Openloomi Hooks?
Skills that share tags, products or a category with Openloomi Hooks: 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 Openloomi Hooks?
melandlabs (a GitHub organization) maintains it in melandlabs/openloomi, which has 1,038 GitHub stars. The repository holds 23 skills in this directory. The repository was last updated on September 24, 2026.
Source: melandlabs/openloomi on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.