system-prompts

A GitHub repository of system-prompt overrides for Claude Code, aimed at shrinking the always-on prompt and adjusting behavior for Opus 4.7. It includes a detailed rationale, measured prompt-size reductions, and install steps using tweakcc-fixed.

An essay arguing that second-person system prompts create attentional overhead and identity fragmentation in agent design, and proposing first-person initialization as an alternative.

Anthropic’s Claude Platform docs page tracking system prompt updates for Claude web and mobile apps, with dated entries across model versions and a note that the updates do not apply to the API.