Jj Enforcer

OpenCode plugin that blocks git usage inside Jujutsu workspaces and forces agents onto jj.

Highlights

• inspects bash tool calls before execution instead of relying on post-hoc review
• detects .jj roots from the workspace, git -C, and cd ... && git ... command patterns
• blocks wrapper forms such as rtk git ... so rewrite plugins cannot bypass the policy
• stays repository local with no external service or daemon requirements
• ships as a small npm package that can also be copied directly into .opencode/plugin

Install

Use the published package from opencode.jsonc:

{
  "plugin": ["@xesrevinu/opencode-jj-enforcer@latest"],
}

Restart OpenCode after updating the plugin list.

If you want to iterate from a checkout instead of npm:

mkdir -p .opencode/plugin
cp plugin/jj-enforcer.ts .opencode/plugin/jj-enforcer.ts

Usage

The plugin checks the current workspace plus directories referenced inside the shell command. If any of them belong to a Jujutsu repository, the command is rejected and the agent is told to use jj.

Examples that are blocked inside a .jj workspace:

git status
git -C ../repo log
cd ../repo && git diff
rtk git log

Development

The repository uses Bun for dependency management and local commands.

bun install
bun run check

Release

This package uses Changesets plus the shared GitHub Actions release workflow.

bun run changeset
bun run version-packages
bun run release

License

MIT