diff --git a/.gitignore b/.gitignore
index ee743a2..2935934 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,7 @@ work/
 
 # Generated by build.sh on every run (rule 8: never edited by hand).
 src/main.tex
+
+# Python bytecode, and per-session scratch work (backups, probes, OCR re-scan).
+__pycache__/
+.scratch/
diff --git a/tools/__pycache__/polish.cpython-312.pyc b/tools/__pycache__/polish.cpython-312.pyc
deleted file mode 100644
index 5cf7448..0000000
Binary files a/tools/__pycache__/polish.cpython-312.pyc and /dev/null differ