Stops your AI coding agent from writing calls to functions that don't exist, before the edit lands. Deterministic, no LLM, no API keys.
Latest release v0.88.0 · 30 Oct 2026
4 files for Claude Code: PreToolUse, PostToolUse, runecho, runecho CLAUDE.md — 1,207 tokens loaded in every session.
CLAUDE.md A 1,207 tok .claude/settings.json A — .claude/settings.json A — .claude/settings.json A — These files are inth3shadows/runecho's own configuration — they tell Claude Code how to work on this repository, so they are not mods to install elsewhere. Copy one as a starting point and replace the parts that are about this project.