Plan - Implementation Planning

Create an implementation plan for a feature or task. Three modes:

• Fast – quick plan, no git branch, saves to the configured fast plan path (default: .ai-factory/PLAN.md)
• Full — richer plan, asks preferences, saves to the configured full-plan directory, and optionally creates a git branch/worktree when git is enabled and branch creation is allowed
• Ultra — exhaustive multi-file plan bundle under the configured full-plan directory: index.md is the manifest/progress ledger and every implementation phase is a separate, deeply specified markdown file. Use it when planning with a stronger model for later execution by a smaller model.

For ultra layout, detail requirements, integrity checks, and consumer behavior, read references/ULTRA-FORMAT.md before creating or modifying the bundle.

Workflow

Step 0 (pre): Detect Handoff Mode

Determine Handoff mode, task ID, and branch contract. Resolve each value independently so legacy callers that pass only HANDOFF_MODE and HANDOFF_TASK_ID still enter Handoff mode correctly: