Executing Sequential Phase

Overview

Sequential phases use natural git-spice stacking in the main worktree.

Each task creates a branch with gs branch create, which automatically stacks on the current HEAD. No manual stacking operations needed.

Critical distinction: Sequential tasks BUILD ON each other. They need integration, not isolation.

When to Use

Use this skill when execute command encounters a phase marked "Sequential" in plan.md:

• ✅ Tasks must run in order (dependencies)
• ✅ Execute in existing {runid}-main worktree
• ✅ Trust natural stacking (no manual gs upstack onto)
• ✅ Stay on task branches (don't switch to base between tasks)

Sequential phases never use worktrees. They share one workspace where tasks build cumulatively.