Under the hoodTier: how much it should matter to you
1Useful: my rating, 1 to 5
1Signal: worth watching, 1 to 5
System PromptArea: what it touches
Internal ChangesKind: in v2.1.317,
Internal ChangesSection of the release
What
The system prompt is the standing set of instructions Claude Code gives the model at the start of a conversation. The part of Claude Code that assembles it no longer accepts an option to replace the whole prompt with a supplied text. The early exit that used that option is gone.
Why
This internal way of swapping in a different system prompt no longer exists.
