P0: Rust engine, wire daemon and audio-reactive descent surface

reference/demo/start.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+cd "$(dirname "$0")"
+
+if [ -z "${DEEPSEEK_API_KEY:-}" ]; then
+  DEEPSEEK_API_KEY="$(python3 - <<'PY'
+import os
+try:
+    import yaml
+    d = yaml.safe_load(open(os.path.expanduser('~/.dsh/.credentials.yaml')))
+    print((d.get('refs') or {}).get('DEEPSEEK_API_KEY', ''))
+except Exception:
+    print('')
+PY
+)"
+  export DEEPSEEK_API_KEY
+fi
+
+if [ -z "${DEEPSEEK_API_KEY}" ]; then
+  echo "no DEEPSEEK_API_KEY — the choir will run in local mode"
+fi
+
+exec node server.js