@enfect/claude

Effect v4 guidance, skills, and post-write pattern checks for Claude Code. Part of Enfect.

Install

For one project, add the marketplace and enable the plugin in .claude/settings.json:

{
  "extraKnownMarketplaces": {
    "enfect": { "source": { "source": "github", "repo": "mpsuesser/enfect" } }
  },
  "enabledPlugins": { "enfect@enfect": true }
}

Or install it from the command line:

claude plugin marketplace add mpsuesser/enfect
claude plugin install enfect@enfect --scope project

The marketplace installs this npm package. To turn the plugin off for one project, run claude plugin disable enfect@enfect --scope project.

What it does

• Guidance is added in full at session start, after /clear, after compaction, and to every subagent when it starts. It is split into labeled parts because each hook output is limited to 10,000 characters.
• Skills load as plugin skills named enfect:effect-*.
• Patterns run after Write, Edit, and MultiEdit. Edits are checked only in newly added text; full writes are checked in full. When several patterns match, the most severe findings include their guidance inline and the rest point to their pattern files.

The hooks need Node.js 20 or newer, with npm, on PATH. In the first session, the plugin installs the @ast-grep/napi native binding into its Claude Code data directory. If that install fails, regex-based checks still run, and the session context notes that AST-based checks are disabled.

Commands

Commands come from packages/commands and ship as plugin skills that only the user can invoke. Try /enfect:enfect-hello-world Ada to get Hello, Ada!. Text after the command name fills $ARGUMENTS.

Develop locally

From the repository root, run bun run build, then start a session with claude --plugin-dir plugins/claude.

License

MIT