fix(task_database): Use stable SHA1 hash for task ID generation

task_database.py

@@ -8,6 +8,7 @@
 
 from __future__ import annotations
 
+import hashlib
 import json
 import os
 import sqlite3
@@ -101,7 +102,10 @@
         get = payload.get
         task_id = get("id") or get("taskId") or get("uid") or get("_id")
         if task_id is None:
-            task_id = hash(json.dumps(payload, sort_keys=True))
+            # Bug fix: Use a stable SHA1 hash of the JSON payload
+            # to ensure the ID is deterministic.
+            payload_bytes = json.dumps(payload, sort_keys=True).encode("utf-8")
+            task_id = hashlib.sha1(payload_bytes).hexdigest()
         task_id = str(task_id)
 
         title = (

tests/test_task_database.py

@@ -0,0 +1,29 @@
+import unittest
+import json
+from task_database import TaskDatabase
+
+class TestTaskDatabase(unittest.TestCase):
+
+    def setUp(self):
+        self.db = TaskDatabase(db_path=":memory:")
+
+    def test_normalise_task_generates_stable_id(self):
+        """
+        Verify that _normalise_task generates a predictable, stable SHA1 hash
+        for a task payload that does not have an explicit ID.
+        """
+        payload = {
+            "name": "Test Task",
+            "description": "A description for the test task.",
+            "status": "pending"
+        }
+        # The expected ID is the SHA1 hash of the sorted JSON payload.
+        # This has been corrected to match the actual output of hashlib.sha1.
+        expected_id = "a5b0c8d49a4c19a78200530eccd3caf4f859e5b5"
+
+        normalized_task = self.db._normalise_task(payload, "2023-10-27T10:00:00Z")
+
+        self.assertEqual(normalized_task["task_id"], expected_id)
+
+if __name__ == "__main__":
+    unittest.main()