AIFIRST The reason your 5-hour window evaporates in minutes: Claude rewrites...
The brief
TodoWrite injects a `todo_reminder` block near the FRONT of the conversation.
Key points
- Every checkbox update re-stamps that block, busting the prompt cache after the system prompt - forcing a full context rewrite (800k-900k to...
Sources
- r/ClaudeAIreddit.com
- Source codegithub.com