setup

# 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. ## Procedure (5 steps, abort on hard failure) ### Step 1: Backend detection Run backend detection: ```bash python3 script.py backend-detect ``` The native engine is the sole generator and needs no external binary — a keyless host CLI (`claude` / `codex` / `gemini`) on PATH, or a provider API key, is sufficient (see Chunk 7's `atlas setup` wizard). The `task-master` binary is no longer required or supported; `backend-detect` reports its presence purely as informational. Continue with the resolved (native) backend. ### Step 2: Project init Check whether the current projec...