feat(runtime): implement single-article consolidation runtime and modularize codebase

tests/runtime/contract/test_prompts_contract.py

@@ -0,0 +1,26 @@
+"""Contract tests for versioned prompts verifying 6-block sequence and parity."""
+
+import hashlib
+from pathlib import Path
+
+
+def test_prompts_6_block_architecture():
+    prompts_dir = Path("prompts")
+    prompt_files = list(prompts_dir.glob("*.txt"))
+    assert len(prompt_files) >= 2
+
+    for p_file in prompt_files:
+        content = p_file.read_text(encoding="utf-8")
+        assert "# BLOCK 1: SYSTEM ROLE & OBJECTIVE" in content
+        assert "# BLOCK 2: TASK INSTRUCTIONS" in content
+        assert "# BLOCK 3:" in content
+        assert "# BLOCK 4: OUTPUT CONTRACT SPECIFICATION" in content
+        assert "# BLOCK 5: QUALITY GUARDRAILS" in content
+        assert "# BLOCK 6: INPUT DATA PAYLOAD" in content
+
+
+def test_prompts_sha256_calculation():
+    prompts_dir = Path("prompts")
+    for p_file in prompts_dir.glob("*.txt"):
+        sha = hashlib.sha256(p_file.read_bytes()).hexdigest()
+        assert len(sha) == 64