Claude Code mod

collision-guard

Warns when another Claude session on the same repo already edited the file being changed, or claimed the same package version.

Guard & safety mods Source

Install

From source
git clone https://github.com/eshin087/claude-code-mods.git
claude --plugin-dir ./claude-code-mods/collision-guard

The repo has no marketplace file, so load the plugin folder directly with --plugin-dir.

What it can access

Reach
L2Writes or runs: runs processes, writes files, reads files, reads env vars, draws
Sees
Edit|Write|NotebookEdit calls
Hooks
session.startturn.starttool.callcommand.run

From a static scan of the mod's code by awesome-claude-code-mods. It shows what the code asks for, not a security review.

How Claude Code mods work

  • A mod is a plugin with a JavaScript or TypeScript module that runs inside Claude Code (version 2.1.287 or later). It can draw panes beside the transcript, a band above the prompt, buttons and toasts, restyle the spinner and tool rows, and watch or rewrite tool calls and prompts.
  • It installs like any plugin: add its marketplace with /plugin marketplace add owner/repo, then /plugin install name@marketplace.
  • Check what a mod can reach before installing: it runs with your permissions. Reach goes from drawing only, to reading files, to writing files or running processes, to the network. Run claude plugin validate on a clone to list its hooks and calls without running it.
  • Turn one off from the Installed tab in /plugin, or start Claude Code with --safe-mode to skip every customization for a session.
Claude Code docs

Details

Repository
eshin087/claude-code-mods
Folder
collision-guard
Author
eshin087
Type
Guard & safety mods
Last updated
25 October 2026
Listed in
awesome-claude-code-mods

FAQ

What is collision-guard?

Warns when another Claude session on the same repo already edited the file being changed, or claimed the same package version. It is a mod for Claude Code, from eshin087/claude-code-mods on GitHub.

What can the collision-guard mod access?

Its widest reach is "writes or runs" (runs processes, writes files, reads files, reads env vars, draws). It sees Edit|Write|NotebookEdit calls. Like any mod, it runs with your permissions.

How do I install collision-guard?

Clone eshin087/claude-code-mods and start Claude Code with --plugin-dir pointing at the mod's folder (collision-guard).

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