From 36bb4236e9c761902edb6ad25235927aeff88737 Mon Sep 17 00:00:00 2001
From: Jackson Ferguson <jackson.ferguson0@gmail.com>
Date: Fri, 30 Jan 2026 20:31:20 -0800
Subject: [PATCH 1/2] feat(sysaudio): add robust signal I/O and metadata
 handling

- Implement `save_signal` with automatic timestamping and compressed .npz storage.
- Add `load_signal` with legacy key support (signal vs data) to handle older captures.
- Create `scan_metadata` utility to aggregate recording attributes into a Pandas DataFrame.
- Add CLI-based file selection (`select_file_cli`) for interactive workflows.
---
 .github/workflows/ci.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e116b6..23eda6c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -40,6 +40,9 @@ jobs:
         uv run ruff check .
         uv run ruff format --check .
 
+    - name: Type check with mypy
+      run: uv run mypy oscilloscope-rp2040
+
     - name: Run Tests
       run: uv run pytest
 

From 49a281f9fe22f95e6e7acff3d1d327ded30c9d5b Mon Sep 17 00:00:00 2001
From: Jackson Ferguson <jackson.ferguson0@gmail.com>
Date: Fri, 30 Jan 2026 20:34:37 -0800
Subject: [PATCH 2/2] fix(sysaudio): allow Path objects in load_signal

- Update `load_signal` type signature to accept `pathlib.Path` in addition to `str`.
- Resolve mypy errors when loading files defined via pathlib in analysis notebooks.
---
 oscilloscope-rp2040/sysaudio/io.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/oscilloscope-rp2040/sysaudio/io.py b/oscilloscope-rp2040/sysaudio/io.py
index 245781a..623b8c2 100644
--- a/oscilloscope-rp2040/sysaudio/io.py
+++ b/oscilloscope-rp2040/sysaudio/io.py
@@ -2,7 +2,8 @@
 import os
 import sys
 from datetime import datetime
-from typing import Any, Optional, Tuple
+from pathlib import Path
+from typing import Any, Optional, Tuple, Union
 
 import numpy as np
 import pandas as pd
@@ -63,7 +64,7 @@ def save_signal(
     return path
 
 
-def load_signal(filepath: str) -> Tuple[np.ndarray, float]:
+def load_signal(filepath: Union[str, Path]) -> Tuple[np.ndarray, float]:
     """
     Robust loader for .npz files.