Phase 3: Handoff

Declarative phase skill. Invoked by the prd-taskmaster orchestrator when current_phase is HANDOFF. Never called directly by a user.

The one rule: detect what the user has, recommend ONE mode, give the user a structured choice, dispatch the chosen mode. Mode D executes only on tier=premium; otherwise it is a locked teaser.

Entry gate

1. Call mcp__plugin_prd_go__check_gate(phase="HANDOFF", evidence={}) for diagnostics.

   check_gate is an EXIT gate: it requires user_mode_choice and plan_file_exists — both produced by HANDOFF itself, i.e. evidence to advance, not to enter. On first entry neither exists yet, so a gate_passed: false here is EXPECTED — the state machine's legal transitions already guarantee only legal entry.