Improved .gitignore.

.gitignore

@@ -3,20 +3,30 @@ data/
 
 # Environment and secrets
 .env
+.env.*
+!.env.example
 .venv/
 venv/
 env/
+ENV/
 
 # Python
 __pycache__/
 *.py[cod]
 *$py.class
 *.so
+*.pyd
 .Python
 
+# uv
+.uv/
+
 # Testing & coverage
 .pytest_cache/
 .coverage
+.coverage.*
+coverage.xml
+nosetests.xml
 htmlcov/
 .tox/
 
@@ -25,11 +35,25 @@ htmlcov/
 .mypy_cache/
 .dmypy.json
 dmypy.json
+.pytype/
 
 # Distribution / packaging
 build/
 dist/
 *.egg-info/
+*.egg
+MANIFEST
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Logs
+*.log
+nohup.out
+
+# Jupyter
+.ipynb_checkpoints/
+profile_default/
+ipython_config.py
 
 # IDE
 .vscode/
@@ -41,6 +65,11 @@ dist/
 # OS
 .DS_Store
 Thumbs.db
+desktop.ini
+
+# Merge artifacts
+*.orig
+*.rej
 
 # Agents
 AGENTS.md