feat(mindmodel): add checks utilities and tests

tests/scripts/mindmodel/test_checks.py

@@ -0,0 +1,43 @@
+import os
+import tempfile
+
+from scripts.mindmodel import checks
+
+
+def test_file_exists(tmp_path):
+    # create a file under tmp_path
+    base = str(tmp_path)
+    p = tmp_path / "subdir"
+    p.mkdir()
+    f = p / "file.txt"
+    f.write_text("hello")
+
+    # path relative to base
+    assert checks.file_exists(base, "subdir/file.txt")
+    # non-existing
+    assert not checks.file_exists(base, "subdir/missing.txt")
+
+
+def test_detect_truncated():
+    assert checks.detect_truncated("This is a truncated snippet...")
+    assert checks.detect_truncated("Truncation marker: [truncated]")
+    assert checks.detect_truncated("contains truncatED word")
+    assert not checks.detect_truncated("This is complete")
+    assert not checks.detect_truncated("")
+
+
+def test_find_potential_secrets():
+    text = """
+    api_key = "abcdEFGH1234ijklMNOP"
+    password: 'hunter2'
+    aws = AKIA1234567890ABCD12
+    random_hex = deadbeefdeadbeefdeadbeefdeadbeef
+    not_a_secret = short
+    """
+
+    found = checks.find_potential_secrets(text)
+    # should find api_key value, password, aws and long hex
+    assert "abcdEFGH1234ijklMNOP" in found
+    assert "hunter2" in found
+    assert any(item.startswith("AKIA") for item in found)
+    assert any("deadbeef" in item for item in found)