Running without an AI provider key
What the built-in development model can and cannot do.
With no provider key configured, agents run on heuristic-dev — a rule-based planner that matches your words to tool names.
It exercises the entire pipeline: planning, validation, policy, approval, execution, tracing and metering. Everything you see is real behaviour, not a simulation.
What it is not is a language model. It matches verbs and nouns, so "show me today's orders" works and an unusual phrasing may not. It also refuses to run in production.
Add ANTHROPIC_API_KEY, OPENAI_API_KEY or GOOGLE_AI_API_KEY and re-seed; the default model switches to a real one automatically.