How to Stress-Test a Coding Agent Harness Before Committing to It

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A developer has proposed a 15-minute evaluation protocol for teams considering jcode, a new MIT-licensed coding-agent harness built in Rust. The test involves creating a minimal repository with a deliberate bug and asking the harness to fix it, then documenting the outcome in a portable exit file. The protocol checks whether the resulting work — diffs, commands, and state — can be verified by another developer using only standard Git and npm tools, without relying on harness-specific formats. A secondary test uses a command that returns a non-zero exit code to verify the harness handles failures gracefully rather than falsely marking tasks complete. The author notes this is an evaluation framework, not a verdict on jcode, and encourages reusing the fixture as an acceptance test for any future harness.

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ProgrammingDEV Community ·

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