diff --git a/fusion_plating/.gitignore b/fusion_plating/.gitignore
index 29075c88..48fcb4ba 100644
--- a/fusion_plating/.gitignore
+++ b/fusion_plating/.gitignore
@@ -2,6 +2,10 @@
 # The companion server saves files here; not project source.
 .superpowers/
 
+# Claude Code preview-tooling state (launch.json for preview_start,
+# throwaway HTML mockups from brainstorming sessions).
+.claude/
+
 # Local Odoo dev artifacts
 *.pyc
 __pycache__/