diff --git a/hooks/format-code.sh b/hooks/format-code.sh
new file mode 100755
index 0000000..0726d25
--- /dev/null
+++ b/hooks/format-code.sh
@@ -0,0 +1,12 @@
+#!/bin/bash
+# Read tool input from stdin (JSON with tool_input.file_path)
+FILE=$(jq -r '.tool_input.file_path // empty' 2>/dev/null)
+
+[ -z "$FILE" ] && exit 0
+
+case "$FILE" in
+  *.py)
+    uvx black --quiet "$FILE" ;;
+  *.js|*.ts|*.jsx|*.tsx)
+    prettier --write "$FILE" 2>/dev/null ;;
+esac
diff --git a/settings.json b/settings.json
index 4468ec0..8c4ef18 100644
--- a/settings.json
+++ b/settings.json
@@ -103,6 +103,18 @@
   },
   "effortLevel": "medium",
   "hooks": {
+    "PostToolUse": [
+      {
+        "matcher": "Edit|Write|MultiEdit",
+        "hooks": [
+          {
+            "type": "command",
+            "command": "/home/cal/.claude/hooks/format-code.sh",
+            "timeout": 10
+          }
+        ]
+      }
+    ],
     "SessionEnd": [
       {
         "hooks": [