Claude Code System Prompts

Sets the maximum number of thinking tokens for extended thinking. When max_thinking_tokens is omitted or null, thinking resets to the session default: any mid-session budget override is cleared (back to the spawn-time budget, if one was set), and thinking stays off for sessions that have it disabled. thinking_display optionally sets the thinking display mode for the rest of the session: a value replaces the session display mode, null clears that override so Claude Code's default display handling applies again, and when omitted the display mode from session start (--thinking-display) is kept.