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Does Claude Code (or whatever harness) have it's own system prompt of on top of Opus'?
by ares623 6mo ago
Does Claude Code (or whatever harness) have it's own system prompt of on top of Opus'?
- simonw 6mo agoYes, in fact it has an entirely different system prompt from the ones that Anthropic publish on https://platform.claude.com/docs/en/release-notes/system-prompts https://platform.claude.com/docs/en/release-notes/system-pro... The Claude Code one isn't published anywhere but it's very easy to get hold of. One way to do that is to run Claude Code through a logging proxy - I was using a project called claude-trace for this last year but I'm not sure if it still works, I've not tried it in a while: https://simonwillison.net/2025/Jun/2/claude-trace/ https://simonwillison.net/2025/Jun/2/claude-trace/