spectacular

Use before starting any new phase - explains how sequential and parallel phases automatically chain together through base branch inheritance (main worktree tracks progress, parallel phases inherit from current branch, no manual intervention needed)

Use when working with stacked branches, managing dependent PRs/CRs, or uncertain about git-spice commands (stack vs upstack vs downstack) - provides command reference, workflow patterns, and common pitfalls for the git-spice CLI tool

Use when starting any conversation in a project using spectacular - establishes mandatory workflows for spec-anchored development, including when to use /spectacular commands and how to work with constitutions

Use to validate spectacular environment - checks superpowers plugin, git-spice, git repo, and project structure before running spectacular workflows

Use before creating worktrees or executing tasks - validates that CLAUDE.md defines required setup commands (install, optional postinstall) and provides clear error messages with examples if missing