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Fable 5.2 system prompt for the Claude Web

by Ashik Nesin Ashik Nesin

Pliny the Liberator is back with another system prompt leak. This time it is Anthropic Fable 5.2

You can check it out here: https://github.com/elder-plinius/CL4R1T4S/blob/main/ANTHROPIC/CLAUDE-WEB-APP-FABLE-5.2.md

2026-11-10-at-23.37.09.png

It’s a massive prompt 😮

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