Binary Test Rewards in Code Agent RL Reward Sloppy Diffs
This story is from 2026-09-29. It is preserved in the archive; the latest stories are on the live feed.
When teams run reinforcement learning for code agents, the reward function almost always defaults to a test suite. A unit test runs in an isolated container. If the exit code is zero, the rollout gets a reward of one. If the test fails, the reward is zero. On paper, this sounds clean. Test-based ve…
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- 2026-09-29 16:19 · DEV Community — Machine Learning
Binary Test Rewards in Code Agent RL Reward Sloppy Diffs