Anthropic published exactly how they get Claude to work autonomously for 6 hours:
• 0:00 - the two failure modes killing every long agent run
• 0:09 - the feature_list.json format + "unacceptable to remove tests" rule
• 0:16 - incremental progress + why they use Puppeteer MCP for testing
• 0:22 - the fixed session-start protocol every fresh agent runs
• 0:28 - verbatim: a typical session transcript
• 0:32 - the failure modes → solutions cheat sheet
read it today, then the article below shows how to steal every piece for your own harness.
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