Development Blog

Notes from building mouse and long-horizon agents.

Sep 28, 2026 6 min read

Inside Muse’s browser stack
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Sep 25, 2026 5 min read

Is Meta’s Muse secretly running an OpenAI model?
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Sep 22, 2026 6 min read

I asked Meta’s Muse for its filesystem and it sent me 6.8 GB
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Sep 14, 2026 4 min read

Mouse on GLM-5.3-Flash

23 of 30 FrontierHarness tasks on Z.ai's Flash model, next to the published GLM-5.3 harness runs, for $6.72 in tokens.
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Sep 11, 2026 3 min read

Rational Awareness

Taking the possibility of failure as seriously as the promise of success.
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Sep 9, 2026 5 min read

Mouse on FrontierHarness

25 of 30 tasks under the benchmark's own scripts, the highest pass rate against the twelve published harnesses.
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Sep 9, 2026 3 min read

How Mouse uses verification loops to keep coding agents working

The Mouse harness, built on OpenCode, took the score from 15/30 to 25/30 using verification loops.
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Aug 28, 2026 8 min read

How to run code agents overnight

House rules on how to run long-horizon agents while you sleep.
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