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"We removed over 80% of Claude Code's system prompt for Opus 5 and Fable 5"

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"We removed over 80% of Claude Code's system prompt for Opus 5 and Fable 5"

#1

Post by nreece » Sat, Jul 25, 2026, 2:18 AM UTC

"We removed over 80% of Claude Code's system prompt for Opus 5 and Fable 5"
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Re: "We removed over 80% of Claude Code's system prompt for Opus 5 and Fable 5"

#2

Post by ncr100 » Sat, Jul 25, 2026, 6:30 AM UTC

https://xcancel.com/trq212/status/2080710971228918066

Re: "We removed over 80% of Claude Code's system prompt for Opus 5 and Fable 5"

#3

Post by no-name-here » Sat, Jul 25, 2026, 6:32 AM UTC

A far better source link: https://claude.com/blog/the-new-rules-of-context-engineering...

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