From bf24097a86ed8e9759d16fc39798cacbb2786849 Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 21:16:24 +0000
Subject: [PATCH 1/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .jules/bolt.md              |  3 +++
 CHANGELOG.md                |  1 +
 audio_library.py            |  6 +++---
 media_shrinker.py           | 14 +++++++-------
 tests/test_audio_library.py | 22 ++++++++++++----------
 tests/test_security.py      |  2 +-
 6 files changed, 27 insertions(+), 21 deletions(-)

diff --git a/.jules/bolt.md b/.jules/bolt.md
index 341c7c91..3e8107ad 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -67,3 +67,6 @@
 ## 2025-02-12 - [Fast Path Execution in Directory Traversal and Log Parsing]
 **Learning:** Checking for string existence (`if "silence_" not in stderr`) before invoking regex matchers provides significant speed improvements when parsing large blocks of text. Similarly, moving expensive I/O operations like `os.path.realpath` inside conditional blocks prevents redundant disk access when configuration (like path exclusions) isn't utilized.
 **Action:** When working on large text processing or disk operations, verify if early exit conditions or conditional execution can bypass the expensive system or library calls.
+## 2026-06-26 - [Use os.stat instead of Path.stat() in hot loops]
+**Learning:** Calling `pathlib.Path(path).stat()` or `.stat()` on an existing Path object adds significant object instantiation and wrapper overhead in hot loops or batch file operations. Utilizing Python's built-in `os.stat(path)` executes measurably faster, as it natively handles path-like objects directly.
+**Action:** Always prefer `os.stat()` for performance-sensitive operations where I/O efficiency is critical.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9313538b..1eeceb62 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,3 +12,4 @@
 ### Fixed
 - 단일·일괄 대상 크기 입력을 비웠을 때 이전 custom validity와 `aria-invalid` 상태를 즉시 초기화해 현재 필수 입력 상태를 정확히 전달합니다.
 - 업로드 파일명의 경로 구분자를 정규화하여 POSIX에서도 Windows 형식의 클라이언트 경로가 일관된 basename으로 기록되도록 수정했습니다.
+- **성능 개선:** 파일 상태 조회 시 `os.stat()`을 사용하여 객체 생성 오버헤드 감소 및 속도 향상
diff --git a/audio_library.py b/audio_library.py
index f3c788a7..ab89e0c6 100644
--- a/audio_library.py
+++ b/audio_library.py
@@ -574,7 +574,7 @@ def trusted_executable(
     if stat.S_ISLNK(lexical_metadata.st_mode) and not allow_symlink:
         raise ValueError(f"trusted executable must not be a symlink: {candidate}")
     resolved = candidate.resolve(strict=True)
-    metadata = resolved.stat()
+    metadata = os.stat(resolved)
     if not stat.S_ISREG(metadata.st_mode) or not os.access(resolved, os.X_OK):
         raise ValueError(f"trusted executable is not an executable file: {candidate}")
     if metadata.st_uid not in {0, os.getuid()}:
@@ -1086,7 +1086,7 @@ def _run_stage_json(
                     current_size_rows = []
                     for partial in staging_dir.glob(pattern):
                         try:
-                            size = partial.stat().st_size
+                            size = os.stat(partial).st_size
                         except FileNotFoundError:
                             # The Rust backend can atomically finalize a partial
                             # between the directory scan and this progress probe.
@@ -9188,7 +9188,7 @@ def is_icloud_dataless(path: Path) -> bool:
     if platform.system() != "Darwin":
         return False
     try:
-        flags = path.stat().st_flags
+        flags = os.stat(path).st_flags
     except FileNotFoundError:
         return False
     return bool(flags & MACOS_SF_DATALESS)
diff --git a/media_shrinker.py b/media_shrinker.py
index 8f25f8aa..ae58ee87 100644
--- a/media_shrinker.py
+++ b/media_shrinker.py
@@ -927,7 +927,7 @@ def preserve_file_attributes(
 
     source = Path(source)
     dest = Path(dest)
-    source_stat = source.stat()
+    source_stat = os.stat(source)
 
     try:
         os.chmod(dest, stat.S_IMODE(source_stat.st_mode) & 0o777)
@@ -1063,7 +1063,7 @@ def safe_source_size(source: Path) -> int:
     """Return source size for reports without letting stat failures abort a batch."""
 
     try:
-        return Path(source).stat().st_size
+        return os.stat(source).st_size
     except OSError:
         return 0
 
@@ -1089,7 +1089,7 @@ def _find_valid_existing_output(
         # Fast path: Rely on stat() throwing OSError to check existence and get size simultaneously,
         # avoiding a redundant exists() syscall. Also defers collision checks for non-existent files.
         try:
-            candidate_size = candidate.stat().st_size
+            candidate_size = os.stat(candidate).st_size
         except OSError:
             continue
         _ensure_not_source_path(source, candidate)
@@ -1184,7 +1184,7 @@ def _execute_segment_conversion(
         overwrite=overwrite,
         protected_sources=resolved_protected_sources,
     )
-    output_size = first_result.stat().st_size
+    output_size = os.stat(first_result).st_size
     if output_size > target_bytes and plan.strategy in {
         "flac-lossless",
         "flac-transcode",
@@ -1212,7 +1212,7 @@ def _execute_segment_conversion(
             protected_sources=resolved_protected_sources,
         )
         plan = opus_plan
-        output_size = first_result.stat().st_size
+        output_size = os.stat(first_result).st_size
 
     try:
         output_duration = _probe_output_duration(
@@ -1393,7 +1393,7 @@ def _remove_invalid_legacy_outputs(
         # Fast path: Rely on stat() throwing OSError to check existence and get size simultaneously,
         # avoiding a redundant exists() syscall. Also defers collision checks for non-existent files.
         try:
-            legacy_size = legacy_output.stat().st_size
+            legacy_size = os.stat(legacy_output).st_size
         except OSError:
             continue
         _ensure_not_source_path(source, legacy_output)
@@ -2090,7 +2090,7 @@ def _parse_probe_payload(
     parsed_size = _first_int(format_section.get("size"))
     if parsed_size is None:
         parsed_size = (
-            source_size if source_size is not None else source_path.stat().st_size
+            source_size if source_size is not None else os.stat(source_path).st_size
         )
 
     audio_bit_rate = _first_int(
diff --git a/tests/test_audio_library.py b/tests/test_audio_library.py
index ae798bbe..e4b42580 100644
--- a/tests/test_audio_library.py
+++ b/tests/test_audio_library.py
@@ -2884,7 +2884,6 @@ def test_stage_command_decodes_success_and_monitors_progress(self) -> None:
 
             vanished = Mock()
             vanished.name = ".codec-carver-73-1.wav.partial"
-            vanished.stat.side_effect = FileNotFoundError
             process = Mock(pid=73, returncode=0)
             process.communicate.side_effect = [
                 subprocess.TimeoutExpired(["core", "stage"], 1),
@@ -2893,6 +2892,7 @@ def test_stage_command_decodes_success_and_monitors_progress(self) -> None:
             with (
                 patch("audio_library.subprocess.Popen", return_value=process),
                 patch("audio_library.Path.glob", side_effect=[[vanished], []]),
+                patch("audio_library.os.stat", side_effect=FileNotFoundError),
                 patch(
                     "audio_library.time.monotonic",
                     side_effect=[0.0, 0.0, 0.5, 0.5],
@@ -8910,17 +8910,19 @@ def test_stream_transcribe_keeps_checkpoint_when_eviction_fails(self) -> None:
             self.assertFalse(staged.exists())
 
     def test_icloud_dataless_detection(self) -> None:
-        path = Mock()
+        path = Mock(spec=Path)
         with patch("audio_library.platform.system", return_value="Linux"):
-            self.assertFalse(is_icloud_dataless(path))
-            path.stat.assert_not_called()
+            with patch("audio_library.os.stat") as mock_stat:
+                self.assertFalse(is_icloud_dataless(path))
+                mock_stat.assert_not_called()
         with patch("audio_library.platform.system", return_value="Darwin"):
-            path.stat.return_value = Mock(st_flags=audio_library.MACOS_SF_DATALESS)
-            self.assertTrue(is_icloud_dataless(path))
-            path.stat.return_value = Mock(st_flags=0)
-            self.assertFalse(is_icloud_dataless(path))
-            path.stat.side_effect = FileNotFoundError
-            self.assertFalse(is_icloud_dataless(path))
+            with patch("audio_library.os.stat") as mock_stat:
+                mock_stat.return_value = Mock(st_flags=audio_library.MACOS_SF_DATALESS)
+                self.assertTrue(is_icloud_dataless(path))
+                mock_stat.return_value = Mock(st_flags=0)
+                self.assertFalse(is_icloud_dataless(path))
+                mock_stat.side_effect = FileNotFoundError
+                self.assertFalse(is_icloud_dataless(path))
 
     def test_staging_capacity_and_safe_cleanup(self) -> None:
         with tempfile.TemporaryDirectory() as tmp:
diff --git a/tests/test_security.py b/tests/test_security.py
index 8a814d7d..df488614 100644
--- a/tests/test_security.py
+++ b/tests/test_security.py
@@ -25,7 +25,7 @@ def test_probe_media_uses_explicit_input_flag_for_dash_prefixed_path(
         )
 
         source_path = Path("-version.wav")
-        with patch.object(Path, "stat") as mock_stat:
+        with patch("media_shrinker.os.stat") as mock_stat:
             mock_stat.return_value = MagicMock(st_size=10)
             probe_media(source_path)
 

From e48f8e5b5f0146b8f8f86755645f6ba1cfbdf196 Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 21:39:08 +0000
Subject: [PATCH 2/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From b0349df3581032240fd6d4519543b703c1d9d39e Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 21:45:20 +0000
Subject: [PATCH 3/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From 6e7a3bfe3de4db36c434ec4cca27c8c5c0d3a00e Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 22:10:22 +0000
Subject: [PATCH 4/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From f6a9461e9a5fb6730759b1f638bef4656612404d Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 22:35:24 +0000
Subject: [PATCH 5/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From 1e1b13ff8b346b67ee31a2b1186f075fa50db3d4 Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Wed, 9 Sep 2026 23:02:28 +0000
Subject: [PATCH 6/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From 3da472f789662d33cfbdb0ff5bc08b5278438213 Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Thu, 10 Sep 2026 00:19:00 +0000
Subject: [PATCH 7/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From f05287b4cba54cd91355a3fa98749d05e3a7c775 Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Thu, 10 Sep 2026 01:29:44 +0000
Subject: [PATCH 8/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=EC=9D=84=20=EC=82=AC=EC=9A=A9?=
 =?UTF-8?q?=ED=95=98=EC=97=AC=20=ED=8C=8C=EC=9D=BC=20=EC=83=81=ED=83=9C=20?=
 =?UTF-8?q?=EC=A1=B0=ED=9A=8C=20=EC=B5=9C=EC=A0=81=ED=99=94?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit


From b3aa175693fe5431421623ab5d6b7a86992b6b0c Mon Sep 17 00:00:00 2001
From: seonghobae <8172694+seonghobae@users.noreply.github.com>
Date: Fri, 11 Sep 2026 18:38:08 +0000
Subject: [PATCH 9/9] =?UTF-8?q?=E2=9A=A1=20Bolt:=20[=EC=84=B1=EB=8A=A5=20?=
 =?UTF-8?q?=EA=B0=9C=EC=84=A0]=20os.stat()=20=EC=B5=9C=EC=A0=81=ED=99=94?=
 =?UTF-8?q?=20=EB=A1=A4=EB=B0=B1=20(=EC=8B=A4=EC=A7=88=EC=A0=81=20?=
 =?UTF-8?q?=EC=84=B1=EB=8A=A5=20=ED=96=A5=EC=83=81=20=EB=B6=80=EC=A1=B1)?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .jules/bolt.md              |  3 ---
 CHANGELOG.md                |  1 -
 audio_library.py            |  6 +++---
 media_shrinker.py           | 14 +++++++-------
 tests/test_audio_library.py | 22 ++++++++++------------
 tests/test_security.py      |  2 +-
 6 files changed, 21 insertions(+), 27 deletions(-)

diff --git a/.jules/bolt.md b/.jules/bolt.md
index 3e8107ad..341c7c91 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -67,6 +67,3 @@
 ## 2025-02-12 - [Fast Path Execution in Directory Traversal and Log Parsing]
 **Learning:** Checking for string existence (`if "silence_" not in stderr`) before invoking regex matchers provides significant speed improvements when parsing large blocks of text. Similarly, moving expensive I/O operations like `os.path.realpath` inside conditional blocks prevents redundant disk access when configuration (like path exclusions) isn't utilized.
 **Action:** When working on large text processing or disk operations, verify if early exit conditions or conditional execution can bypass the expensive system or library calls.
-## 2026-06-26 - [Use os.stat instead of Path.stat() in hot loops]
-**Learning:** Calling `pathlib.Path(path).stat()` or `.stat()` on an existing Path object adds significant object instantiation and wrapper overhead in hot loops or batch file operations. Utilizing Python's built-in `os.stat(path)` executes measurably faster, as it natively handles path-like objects directly.
-**Action:** Always prefer `os.stat()` for performance-sensitive operations where I/O efficiency is critical.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1eeceb62..9313538b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,4 +12,3 @@
 ### Fixed
 - 단일·일괄 대상 크기 입력을 비웠을 때 이전 custom validity와 `aria-invalid` 상태를 즉시 초기화해 현재 필수 입력 상태를 정확히 전달합니다.
 - 업로드 파일명의 경로 구분자를 정규화하여 POSIX에서도 Windows 형식의 클라이언트 경로가 일관된 basename으로 기록되도록 수정했습니다.
-- **성능 개선:** 파일 상태 조회 시 `os.stat()`을 사용하여 객체 생성 오버헤드 감소 및 속도 향상
diff --git a/audio_library.py b/audio_library.py
index ab89e0c6..f3c788a7 100644
--- a/audio_library.py
+++ b/audio_library.py
@@ -574,7 +574,7 @@ def trusted_executable(
     if stat.S_ISLNK(lexical_metadata.st_mode) and not allow_symlink:
         raise ValueError(f"trusted executable must not be a symlink: {candidate}")
     resolved = candidate.resolve(strict=True)
-    metadata = os.stat(resolved)
+    metadata = resolved.stat()
     if not stat.S_ISREG(metadata.st_mode) or not os.access(resolved, os.X_OK):
         raise ValueError(f"trusted executable is not an executable file: {candidate}")
     if metadata.st_uid not in {0, os.getuid()}:
@@ -1086,7 +1086,7 @@ def _run_stage_json(
                     current_size_rows = []
                     for partial in staging_dir.glob(pattern):
                         try:
-                            size = os.stat(partial).st_size
+                            size = partial.stat().st_size
                         except FileNotFoundError:
                             # The Rust backend can atomically finalize a partial
                             # between the directory scan and this progress probe.
@@ -9188,7 +9188,7 @@ def is_icloud_dataless(path: Path) -> bool:
     if platform.system() != "Darwin":
         return False
     try:
-        flags = os.stat(path).st_flags
+        flags = path.stat().st_flags
     except FileNotFoundError:
         return False
     return bool(flags & MACOS_SF_DATALESS)
diff --git a/media_shrinker.py b/media_shrinker.py
index ae58ee87..8f25f8aa 100644
--- a/media_shrinker.py
+++ b/media_shrinker.py
@@ -927,7 +927,7 @@ def preserve_file_attributes(
 
     source = Path(source)
     dest = Path(dest)
-    source_stat = os.stat(source)
+    source_stat = source.stat()
 
     try:
         os.chmod(dest, stat.S_IMODE(source_stat.st_mode) & 0o777)
@@ -1063,7 +1063,7 @@ def safe_source_size(source: Path) -> int:
     """Return source size for reports without letting stat failures abort a batch."""
 
     try:
-        return os.stat(source).st_size
+        return Path(source).stat().st_size
     except OSError:
         return 0
 
@@ -1089,7 +1089,7 @@ def _find_valid_existing_output(
         # Fast path: Rely on stat() throwing OSError to check existence and get size simultaneously,
         # avoiding a redundant exists() syscall. Also defers collision checks for non-existent files.
         try:
-            candidate_size = os.stat(candidate).st_size
+            candidate_size = candidate.stat().st_size
         except OSError:
             continue
         _ensure_not_source_path(source, candidate)
@@ -1184,7 +1184,7 @@ def _execute_segment_conversion(
         overwrite=overwrite,
         protected_sources=resolved_protected_sources,
     )
-    output_size = os.stat(first_result).st_size
+    output_size = first_result.stat().st_size
     if output_size > target_bytes and plan.strategy in {
         "flac-lossless",
         "flac-transcode",
@@ -1212,7 +1212,7 @@ def _execute_segment_conversion(
             protected_sources=resolved_protected_sources,
         )
         plan = opus_plan
-        output_size = os.stat(first_result).st_size
+        output_size = first_result.stat().st_size
 
     try:
         output_duration = _probe_output_duration(
@@ -1393,7 +1393,7 @@ def _remove_invalid_legacy_outputs(
         # Fast path: Rely on stat() throwing OSError to check existence and get size simultaneously,
         # avoiding a redundant exists() syscall. Also defers collision checks for non-existent files.
         try:
-            legacy_size = os.stat(legacy_output).st_size
+            legacy_size = legacy_output.stat().st_size
         except OSError:
             continue
         _ensure_not_source_path(source, legacy_output)
@@ -2090,7 +2090,7 @@ def _parse_probe_payload(
     parsed_size = _first_int(format_section.get("size"))
     if parsed_size is None:
         parsed_size = (
-            source_size if source_size is not None else os.stat(source_path).st_size
+            source_size if source_size is not None else source_path.stat().st_size
         )
 
     audio_bit_rate = _first_int(
diff --git a/tests/test_audio_library.py b/tests/test_audio_library.py
index e4b42580..ae798bbe 100644
--- a/tests/test_audio_library.py
+++ b/tests/test_audio_library.py
@@ -2884,6 +2884,7 @@ def test_stage_command_decodes_success_and_monitors_progress(self) -> None:
 
             vanished = Mock()
             vanished.name = ".codec-carver-73-1.wav.partial"
+            vanished.stat.side_effect = FileNotFoundError
             process = Mock(pid=73, returncode=0)
             process.communicate.side_effect = [
                 subprocess.TimeoutExpired(["core", "stage"], 1),
@@ -2892,7 +2893,6 @@ def test_stage_command_decodes_success_and_monitors_progress(self) -> None:
             with (
                 patch("audio_library.subprocess.Popen", return_value=process),
                 patch("audio_library.Path.glob", side_effect=[[vanished], []]),
-                patch("audio_library.os.stat", side_effect=FileNotFoundError),
                 patch(
                     "audio_library.time.monotonic",
                     side_effect=[0.0, 0.0, 0.5, 0.5],
@@ -8910,19 +8910,17 @@ def test_stream_transcribe_keeps_checkpoint_when_eviction_fails(self) -> None:
             self.assertFalse(staged.exists())
 
     def test_icloud_dataless_detection(self) -> None:
-        path = Mock(spec=Path)
+        path = Mock()
         with patch("audio_library.platform.system", return_value="Linux"):
-            with patch("audio_library.os.stat") as mock_stat:
-                self.assertFalse(is_icloud_dataless(path))
-                mock_stat.assert_not_called()
+            self.assertFalse(is_icloud_dataless(path))
+            path.stat.assert_not_called()
         with patch("audio_library.platform.system", return_value="Darwin"):
-            with patch("audio_library.os.stat") as mock_stat:
-                mock_stat.return_value = Mock(st_flags=audio_library.MACOS_SF_DATALESS)
-                self.assertTrue(is_icloud_dataless(path))
-                mock_stat.return_value = Mock(st_flags=0)
-                self.assertFalse(is_icloud_dataless(path))
-                mock_stat.side_effect = FileNotFoundError
-                self.assertFalse(is_icloud_dataless(path))
+            path.stat.return_value = Mock(st_flags=audio_library.MACOS_SF_DATALESS)
+            self.assertTrue(is_icloud_dataless(path))
+            path.stat.return_value = Mock(st_flags=0)
+            self.assertFalse(is_icloud_dataless(path))
+            path.stat.side_effect = FileNotFoundError
+            self.assertFalse(is_icloud_dataless(path))
 
     def test_staging_capacity_and_safe_cleanup(self) -> None:
         with tempfile.TemporaryDirectory() as tmp:
diff --git a/tests/test_security.py b/tests/test_security.py
index df488614..8a814d7d 100644
--- a/tests/test_security.py
+++ b/tests/test_security.py
@@ -25,7 +25,7 @@ def test_probe_media_uses_explicit_input_flag_for_dash_prefixed_path(
         )
 
         source_path = Path("-version.wav")
-        with patch("media_shrinker.os.stat") as mock_stat:
+        with patch.object(Path, "stat") as mock_stat:
             mock_stat.return_value = MagicMock(st_size=10)
             probe_media(source_path)