Autonomous Skill - Multi-Session Task Execution Execute complex tasks across multiple Claude Code sessions with automatic continuation, progress tracking, and two completion mechanisms (promise tags + checkbox counting). Two Execution Modes Headless Mode (default) Spawns child sessions in a bash loop. Best for background/unattended work. Hook Mode (in-session) Uses a Stop hook to intercept session exit and feed the prompt back. Runs inside the current interactive session — no nesting issues. Two Task Strategies Structured (default) Full task decomposition: Initializer creates with phased sub-…