What problem does it solve? Coding agents like Claude Code, Codex, and Gemini CLI each keep their own global instruction files, so making every agent on a machine offload rank/classify/yes-no decisions to TypeSafe's Jev requires editing four separate files by hand and keeping them in sync. This Skill installs the jev CLI and a managed BCP 14 instruction block into all of them idempotently, with drift detection and safe uninstall. ## Core Features & Use Cases - Multi-agent installation: Writes a managed Jev block into ~/.claude/CLAUDE.md, ~/.agents/AGENTS.md, $CODEX_HOME/AGENTS.md, and ~/.gemini/GEMINI.md, preserving all content outside the markers and backing up files before first modification. - Block or mirror modes: --mode block adds only the Jev rules; --mode mirror gives non-Claude agents a managed copy of the whole CLAUDE.md with @imports inlined. - Drift checking and verification: --check reports OK/STALE/MISSING per target with exit 1 on drift, refuses malformed markers with exit 3 before writing, and supports a smoke-test Noul call plus jev log review of per-project call logs. - Use Case: You set up a new laptop and want Claude Code, Codex, and Gemini CLI to all route their System One decisions through Jev. Run the installer once, add your TypeSafe API key to ~/.config/typesafe/env, and verify with --check. ## Quick Start Ask your agent to set up Jev for all coding agents on this machine and verify the installation with a drift check.