Sandbox demo
Writing Tests-First
Red, green, refactor — but the agent does the typing.
The tightest TDD loop you'll ever drive. You describe the spec; the agent writes the failing test; the agent writes the implementation; you review; the agent refactors. You do almost no typing — but you steer with precision.
Sandbox transcript
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The transcript is canned — no real API calls. The point is to internalize the loop: user → plan → tool → result → answer.
Check your understanding
Q1. What does seeing all 5 tests fail before any implementation prove?
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