docs: add CI validation scripts (#4)

Add the scripts required by validate-workspace-template.yml:
- .molecule-ci/scripts/validate-workspace-template.py
- .molecule-ci/scripts/requirements.txt

Co-authored-by: Molecule AI Plugin-Dev <plugin-dev@agents.moleculesai.app>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

.molecule-ci/scripts/requirements.txt

@@ -0,0 +1 @@
+pyyaml>=6.0

.molecule-ci/scripts/validate-workspace-template.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python3
+"""Validate a Molecule AI workspace template repo."""
+import os, sys, yaml
+
+errors = []
+
+if not os.path.isfile("config.yaml"):
+    print("::error::config.yaml not found at repo root")
+    sys.exit(1)
+
+with open("config.yaml") as f:
+    config = yaml.safe_load(f)
+
+if not config.get("name"):
+    errors.append("Missing required field: name")
+if not config.get("runtime"):
+    errors.append("Missing required field: runtime")
+
+known = {"langgraph", "claude-code", "crewai", "autogen", "deepagents", "hermes", "gemini-cli", "openclaw"}
+runtime = config.get("runtime", "")
+if runtime and runtime not in known:
+    print(f"::warning::Runtime '{runtime}' is not in the known set. OK for custom runtimes.")
+
+# Check for legacy imports
+if os.path.isfile("adapter.py"):
+    with open("adapter.py") as f:
+        content = f.read()
+        if "molecule_runtime" in content:
+            print("::warning::adapter.py imports 'molecule_runtime' — legacy import, use 'molecule_ai' or platform SDK")
+
+# Check for missing molecule-ai-workspace-runtime dependency hint
+if os.path.isfile("Dockerfile"):
+    with open("Dockerfile") as f:
+        content = f.read()
+        if "molecule-ai-workspace-runtime" not in content:
+            print("::warning::Dockerfile does not reference 'molecule-ai-workspace-runtime' — may need base runtime package")
+
+sv = config.get("template_schema_version")
+if sv is None:
+    errors.append("Missing template_schema_version (add: template_schema_version: 1)")
+
+if errors:
+    for e in errors:
+        print(f"::error::{e}")
+    sys.exit(1)
+
+print(f"✓ config.yaml valid: {config['name']} (runtime: {config.get('runtime')})")