Claude Code creator Boris Cherny ( @bcherny )
"For people who aren't building agentic products but are using Claude Code, every 6 months, delete your claude.md file, delete your skills, and delete your hooks. Then see what the model does. It might surprise you.
For Opus 5, we strongly recommend trying to delete all of these things because the model may no longer need the extensive instructions that were necessary for previous models."
- at Y Combinator Startup School 2026.
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From "Y Combinator" YouTube channel, (full video link in comment)