Standalone, host-agnostic Ralph-loop driver: run any AI coding CLI (Claude Code, Codex, OpenCode, Gemini, Aider, Amp, Copilot, …) in a tight self-driving loop against a file-state workspace, with structured specs/tickets/gotchas/plan, stop conditions, and minimum-LLM-call defaults. Stdlib-only Python; no internet; no cross-skill dependencies.