Agent loop starter (no API key required)
=========================================

node agent-loop.js "convert 12 miles to km, then count the words in: the quick brown fox"

This is the plan -> act -> observe loop every real tool-using AI agent runs, with the planner
replaced by a tiny rule-based one so it runs free, offline, and the same every time. Open
agent-loop.js and read planSteps() and TOOLS -- that is the one part you replace with a real
model call later. Everything else (the loop, the transcript, the tool contract) stays the same.
