What problem does it solve? Splitting a large change into stacked pull requests is error-prone: files get lost between layers, lower layers break the trunk when merged alone, and rebases silently turn previously-green branches red. This Skill takes an approved stack plan and executes it safely, enforcing a per-layer green gate so every PR in the stack is reviewable and mergeable on its own. ## Core Features & Use Cases - Plan-driven stack execution: Reads a validated stacked-pr/<slug>/stack-plan.md and refuses to run on incomplete plans (missing ticket, unanswered decisions, fewer than 2 layers, red build). - Snapshot-protected splitting: Commits the existing worktree to a snapshot branch before touching any branch, then materializes each layer file-by-file with a completeness check proving nothing was dropped. - Mandatory per-layer green gate: Runs build, scoped tests, lint attributed to each layer's own base, and the repo's pre-commit hooks — never --no-verify, never submitting a red layer. - Stack lifecycle management: Submits via gh stack submit, writes PR bodies from templates, and handles sync, rebase, conflict resolution, and bottom-up merging. - Use Case: After planning a 4-layer stack with /orc-pr-setup, run this Skill to create one branch and PR per layer, verify each layer passes CI independently, and merge them bottom-up as reviews complete. ## Quick Start Ask the assistant to run /orc-pr-driver to build and submit the stacked pull requests from your approved stack plan.