test: version-sync test reads pyproject.toml instead of hard-coding

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/test_core.py

@@ -3,9 +3,11 @@ proper test functions with tmp_path/monkeypatch fixtures)."""
 
 import json
 import os
+import re
 import sys
 import urllib.error
 import urllib.request
+from pathlib import Path
 
 import pytest
 
@@ -1187,8 +1189,12 @@ def test_restart_claude_desktop_linux_refuses_without_touching_processes(monkeyp
 # --------------------------------------------------------------------------- #
 def test_dunder_version_matches_pyproject():
     # Guards against the version drifting out of sync between the two places
-    # a human might bump it.
-    assert c.__version__ == "1.2.0"
+    # a human might bump it. Reads pyproject.toml rather than hard-coding a
+    # version here (which would make this a third place to bump).
+    text = (Path(__file__).parent.parent / "pyproject.toml").read_text(encoding="utf-8")
+    m = re.search(r'^version\s*=\s*"([^"]+)"', text, re.MULTILINE)
+    assert m, "no [project] version found in pyproject.toml"
+    assert c.__version__ == m.group(1)
 
 
 def test_parse_version_basic():