Post
Simon Willison
simonwillison.net
did:plc:kft6lu4trxowqmter2b6vg6z
As part of exploring this I used Fable 5.1 to build a new system for tracking and summarizing Claude system prompt changes - it even has an Atom feed! https://github.com/simonw/claude-system-prompts
2026-09-02T14:20:15.615Z