Issue Slice Autopilot

Drive a complex issue to completion across multiple PRs with minimal or no user intervention.

This skill is for long-running tasks where one giant PR is too risky. It repeatedly:

1. selects the largest sane slice with no overlap with in-flight work,
2. implements and validates the slice,
3. runs $commit-and-push,
4. runs $enter-merge-queue until merged,
5. refreshes state and repeats.

Core Rules