Understanding Cross-Phase Stacking

Overview

Phases automatically build on each other's completed work. Understanding how phases chain together is essential for correct execution.

This is a reference skill - read it to understand cross-phase dependencies, not to execute a workflow.

When to Use

Use this skill when:

• Starting a new phase (need to understand what base to build from)
• Debugging stack relationships across phase boundaries
• Verifying phases are chaining correctly
• Understanding why parallel worktrees use specific base branches

Mental model check: If you're thinking "create worktrees from {runid}-main branch", you need this skill.

The Cross-Phase Inheritance Principle