diff --git a/.gitignore b/.gitignore
index 82f901b..65151d9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -22,6 +22,7 @@ env/
 *.swo
 *~
 docs
+
 # OS
 .DS_Store
 Thumbs.db
@@ -39,8 +40,3 @@ dist/
 *.spec
 *.icns
 *.ico
-# Superpowers brainstorming visual companion
-.superpowers/
-.llm-wiki/
-.agents/
-.pi/
diff --git a/src/pygui/__main__.py b/src/pygui/__main__.py
index 0e3efd5..03c7f81 100644
--- a/src/pygui/__main__.py
+++ b/src/pygui/__main__.py
@@ -12,7 +12,7 @@ from pygui.backend.data.file_browser import FileBrowser
 from pygui.backend.data.local_settings import LocalSettings
 from pygui.backend.data.local_settings_model import LocalSettingsModel
 
-# Importing wafer_map_item registers the @QmlElement WaferMapItem (QML: import ISC.Wafer).
+# Importing wafer_map_item + trend_chart_item registers @QmlElement types (QML: import ISC.Wafer).
 
 
 # ===== Application Entry Point =====
diff --git a/src/pygui/serialcomm/stream_reader.py b/src/pygui/serialcomm/stream_reader.py
index 54cbba2..64cd069 100644
--- a/src/pygui/serialcomm/stream_reader.py
+++ b/src/pygui/serialcomm/stream_reader.py
@@ -184,9 +184,8 @@ class StreamReader:
                         # Sync marker appeared – hand off to binary parser.
                         hex_chars.append(byte)
                         break
-                    c = chr(byte)
-                    if c in "0123456789ABCDEFabcdef":
-                        hex_chars.append(c)
+                    if chr(byte) in "0123456789ABCDEFabcdef":
+                        hex_chars.append(byte)
                 else:
                     continue
                 break  # broke out of inner loop due to 0xAA