One standard tool-use loop replaces the need for layered JSON routing:
the LLM sees all 22 tools plus real multi-turn history, every tool result
(including errors) returns to the loop as an observation, and the final
user-facing reply is always LLM-written. Interruptions report exactly
which tools already executed so side effects are never silently lost or
repeated by fallback paths. Gated by NOFX_AGENT_V2 (default on).
