Phase 0: Setup

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

Entry gate

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

   check_gate is an EXIT gate: it verifies you have the evidence to advance, not to enter. On first entry you have no evidence yet (Step 4 below produces validate_setup.ready=true), so a gate_passed: false result here is EXPECTED — the state machine's legal transitions (None → SETUP) already guarantee only legal entry.

   • First entry (no evidence yet): note the result and continue with the Procedure.
   • Re-entry: if the gate reports violations, report them and stop — it protects against re-running a completed phase or skipping ahead.

   Enforce the gate when you ADVANCE (after the procedure), not on entry.