diff --git a/.gitignore b/.gitignore
index 9c86897..83f4bf5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,7 @@
 # cust
 ./*.csv
+.claude/
+data/
 
 # Allow test fixture data
 !tests/fixtures/data/
@@ -23,6 +25,8 @@ instance/
 # SQLite database files
 *.sqlite3
 *.db
+*.db-shm
+*.db-wal
 
 # Migrations
 migrations/
diff --git a/requirements.txt b/requirements.txt
index 93d6bdd..eedac8f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,6 @@
 requests>=2.31.0
 lxml>=5.0.0
+cssselect>=1.2.0
 yfinance>=0.2.0
 python-dotenv>=1.0.0
 alpaca-trade-api>=3.0.0