init: seed framework reference content from agent-runtimes main repo

harnesses/composites/minimax-tdd-impl/v1/harness.yaml

@@ -0,0 +1,13 @@
+kind: composite
+name: minimax-tdd-impl
+version: 1
+description: "MiniMax TDD implementation agent — tests locked read-only at OS level, cannot be modified"
+
+layers:
+  - context: minimax-code-methodology/v1
+  - context: minimax/v1
+  - context: gitea-ssh/v1
+  - context: agent-repo/v1
+  - context: tdd-protect/v1
+  - capability: python-dev/v1
+  - capability: tdd-file-lock/v1