Claude Code creator Boris Cherny just deleted 80% of Claude Code's system prompt
In a free 36-minute talk on why Opus 5 needs fewer instructions, not more: 03:38 - Delete 80% of your system prompt 07:46 - Add instructions back only after repeated failures 17:21 - Rewrite an
$35 in free Claude Opus 5 API credits for a week.
Point it at Codex, OpenCode, Cursor, or literally any tool that takes a custom API endpoint. It's called Aerolink. Sign up with Google, a free trial activates automatically - no card, no manual claim. Setup for OpenCode Desktop:
A long session sitting at 80% of a 1M-token window re-sends 800k tokens per turn.
Opus input is $5 per million. Now a hook watches the fill. At 20% it dumps the live task into the vault runs /clear. The next session boots from about 13k tokens. Seven cents.
Framer just gave designers a dial that controls how hard opus 5 thinks before it touches your prototype
Built the effort dial directly into their Agent model picker the same mechanic Anthropic shipped, now sitting inside an actual design tool: Light reasoning - quick edits,
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