Under the hood
The coding system prompt no longer includes its 'scratchpad' and 'language' sections
What
The function that assembles Claude Code's system prompt no longer includes a 'scratchpad' section, nor the 'language' sections it previously had. Handling of environment info was also consolidated into a single call instead of being spread across the prompt assembly.
Why
Removing these sections changes what built-in guidance the model receives at the start of every conversation, though the evidence doesn't say what, if anything, replaced their function.
Something disagreesSomething we can check disagrees with this entry, or the writer said they could not settle it.
The writer flagged doubt
What, if anything, replaces the removed scratchpad and language guidance is not shown in the evidence.