Implement WebAssembly runtime and kinematics coverage

scripts/test_validate_task_pointer.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+import tempfile
+import unittest
+import json
+from pathlib import Path
+
+from validate_task_pointer import PointerError, validate_pointer
+
+
+VALID = """# pointer
+## Current
+context_id: c1
+## Read
+read paths only; coverage/report.json
+## Task
+one result
+## Next
+one next
+## Verify
+one test
+## Stop
+stop on drift
+"""
+
+
+class TaskPointerTests(unittest.TestCase):
+    def write(self, text: str) -> Path:
+        directory = tempfile.TemporaryDirectory()
+        self.addCleanup(directory.cleanup)
+        path = Path(directory.name) / "nextTask.md"
+        path.write_text(text, encoding="utf-8")
+        return path
+
+    def test_valid_pointer_reports_bounded_size(self):
+        result = validate_pointer(self.write(VALID))
+        self.assertLessEqual(result["bytes"], 8192)
+
+    def test_context_id_must_match_lock_when_supplied(self):
+        directory = tempfile.TemporaryDirectory()
+        self.addCleanup(directory.cleanup)
+        root = Path(directory.name)
+        pointer = root / "nextTask.md"
+        pointer.write_text(VALID, encoding="utf-8")
+        lock = root / "context-lock.json"
+        lock.write_text(json.dumps({"context_id": "other"}), encoding="utf-8")
+        with self.assertRaisesRegex(PointerError, "does not match lock"):
+            validate_pointer(pointer, lock_path=lock)
+
+    def test_history_heading_is_rejected(self):
+        with self.assertRaisesRegex(PointerError, "history section"):
+            validate_pointer(self.write(VALID + "\n## History\nold log\n"))
+
+    def test_evidence_heading_is_rejected(self):
+        with self.assertRaisesRegex(PointerError, "history section"):
+            validate_pointer(self.write(VALID + "\n## Evidence\nold evidence\n"))
+
+    def test_large_pointer_is_rejected(self):
+        with self.assertRaisesRegex(PointerError, "byte budget"):
+            validate_pointer(self.write(VALID + "x" * 9000))
+
+
+if __name__ == "__main__":
+    unittest.main()