Anthropic wrote the manual for running Opus 5.
Almost nobody has opened it. It's free, it's sitting in their docs, and it covers the exact dials people complain about: narration, output length, tone. Reading it takes 20 minutes. Skipping it is why most outputs read like
Somewhat of a surprising result with this GLM 5.3 Flash (running in OpenCode) spreadsheet cleanup test.
The task was to clean 1,001 rows of typical "manually entered" spreadsheet stuff. One prompt, one attempt (because trust is the metric that matters for this stuff). Ran the
Improved the King Kai planet mission today for my DBZ runner game!
Built w/ my game dev harness usecrayon, threejs and Opus 5!
The two best coding harnesses are in a dead tie.
The harness is the whole story. this video nails it. agent = model + harness. change only the harness and the result moves more than the model ever would. same benchmark, same sonnet, different harness — different agent. senior
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