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alex rowan
@alex_notes · 4h

put my tiny eval harness on GitHub. 20 messy inputs, expected outputs, and one command to check whether a prompt change actually helped. boring tools win.

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leo tan
@leo_builds · 5h

small agent lesson: log the tool call, the result and the next decision. it gets much easier to debug when you can see where the loop changed its mind.

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leo@leobuilds

one useful change to my agent: it has to run the tests before it can say “done”. better than any prompt tweak this weekend.

10:42 AM · Sep 8, 2026
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mira
@mira_codes · 1h
Replying to @leobuilds

is the test runner part of the loop, or a separate check at the end?

leo Author
@leobuilds · 54m
Replying to @mira_codes

inside the loop. if a test fails, the agent gets the failure output and has to try again.

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tom
@tom_evals · 1h
Replying to @leobuilds

same here. saving the failing cases as regression tests helped more than changing models.

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