What is WorktreeCreate?

An automatic action that runs a Node.js event-reporting script when Git creates a worktree, an additional working copy of a repository.

Use it to report this Git worktree event through the listed hook script.

It records worktree creation without requiring a manual reporting command.

WorktreeCreate — Hook by JKHeadley

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add hooks/jkheadley/instar/worktree-create

Clone the repo

git clone --depth 1 https://github.com/JKHeadley/instar

Made for: Claude Code.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin 97% copy Near-identical to another mod in the catalogue.

Security

Grade A, and why

WorktreeCreate scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the commands this hook runs, not an audit. A hook is shell that executes on your machine at the event it names, which is why every command in it is printed with what was found.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

97% identical to PostToolUse — 2 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

.claude/settings.json · 14 lines

What it actually says

{
  "WorktreeCreate": [
    {
      "matcher": "",
      "hooks": [
        {
          "type": "command",
          "command": "node .instar/hooks/instar/hook-event-reporter.js",
          "timeout": 3000
        }
      ]
    }
  ]
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2d ago First seen · 14 lines scan A f15562dc07bf

Subscribe to this mod's changes

WorktreeCreate is a hook published in the GitHub repository JKHeadley/instar (77 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: a hook is shell that never enters the context. A static security scan graded it A with 0 findings. It is 97% identical to PostToolUse, differing in 2 lines, and is treated as a copy.

Data and AI Git and workflow Memory and context agent-framework agent-identity agent-infrastructure agent-memory agent-skills ai-agents

PreToolUse

Runs before the agent uses a tool for Bash tool calls, executing code_scanner_hook.py, observability_hook.py and pii_checker_hook.py via python3 (3 commands). From alibaba/anolisa.

alibaba/anolisa · not measured

Stop

Runs when the agent finishes a response, executing observability_hook.py via python3. From alibaba/anolisa.

alibaba/anolisa · not measured

UserPromptSubmit

Runs when you submit a prompt, before the agent sees it for 编码, 开发, python, git, push, 爬虫, API, 部署, Docker, 数据库, Linux, shell, npm, pip, 安装, 配置, 调试, 测试, 重构, 优化, 架构, 系统, 引擎, 项目, 仓库, 文件操作, 数据抓取, 分析, 报告, PDF, Excel, Word, PPT, 图片, 视频, 生成, 创作, 写文章, 写代码, 做网站, 建应用, 设计, UI, UX, 前端, 后端, 全栈, 开发工具, IDE, VSCode, JetBrains…

jiabaobei/skills-constitution · not measured

WorktreeCreate