feat: add minimal run engine

docs/schemas/templates/development@1.yaml

@@ -0,0 +1,35 @@
+name: development
+version: 1
+roles:
+  - id: spec_writer
+    requiredCapabilities:
+      - spec_write
+    preferredBackends:
+      - fake
+  - id: phase_planner
+    requiredCapabilities:
+      - phase_planning
+    preferredBackends:
+      - fake
+phases:
+  - key: spec
+    title: Development Specification
+    risk: low
+    roles:
+      - spec_writer
+    expectedArtifact:
+      path: artifacts/spec.json
+      schema: dev/spec@1
+    gates:
+      - spec_approved
+  - key: phase_plan
+    title: Phase Plan
+    risk: low
+    roles:
+      - phase_planner
+    expectedArtifact:
+      path: artifacts/phase-plan.json
+      schema: dev/phase-plan@1
+    gates:
+      - phase_plan_approved
+defaultGates: []