chore: bootstrap agnostic agent harness framework

harness/workflow.stages.yml

@@ -0,0 +1,55 @@
+version: 1
+
+feature_states:
+  allowed: [pending, in_progress, blocked, done]
+
+stages:
+  - name: intake
+    owner: leader
+    input:
+      - backlog/features.json
+      - work/current.md
+    output:
+      - work/current.md
+
+  - name: design
+    owner: architect
+    optional: true
+    output:
+      - work/artifacts/<feature_id>/architect.md
+
+  - name: build
+    owner: implementer
+    output:
+      - work/artifacts/<feature_id>/implementer.md
+
+  - name: review_gate
+    owner: reviewer
+    required: true
+    output:
+      - work/artifacts/<feature_id>/reviewer.json
+
+  - name: security_gate
+    owner: security
+    required: true
+    output:
+      - work/artifacts/<feature_id>/security.json
+
+  - name: qa_gate
+    owner: qa
+    required: true
+    output:
+      - work/artifacts/<feature_id>/qa.json
+
+  - name: close
+    owner: leader
+    required: true
+    output:
+      - work/artifacts/<feature_id>/leader-close.json
+      - work/history.md
+
+close_requirements:
+  - reviewer.json.verdict == "APPROVED"
+  - security.json.verdict == "APPROVED"
+  - qa.json.verdict == "APPROVED"
+  - scripts/verify.sh exit_code == 0