Implement provider-neutral Lean reasoning and evaluation foundation

tests/test_core.py

@@ -0,0 +1,20 @@
+import unittest
+from lean_agent.core import LeanVerifier, solve, extract
+class Scripted:
+    def __init__(self): self.calls = 0
+    def complete(self, messages):
+        self.calls += 1
+        return 'exact False.elim' if self.calls == 1 else 'intro n; rfl'
+class Tests(unittest.TestCase):
+    def test_repair(self):
+        result = solve(Scripted(), LeanVerifier(), {'id':'x','statement':'∀ n : Nat, n = n'})
+        self.assertTrue(result['success'])
+        self.assertEqual(len(result['attempts']), 2)
+    def test_holes(self):
+        for proof in ['sorry', 'admit', 'exact (by sorry)', 'rfl\n#eval 1']:
+            self.assertFalse(LeanVerifier().check('1 = 1', proof).success)
+    def test_false(self):
+        self.assertFalse(LeanVerifier().check('False', 'trivial').success)
+    def test_extract(self):
+        self.assertEqual(extract('```lean\nby\n  rfl\n```'), 'rfl')
+if __name__ == '__main__': unittest.main()