diff --git a/.gitignore b/.gitignore
index fb255d1..4d000c1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -35,6 +35,8 @@ deploy/*-auth-secret.yaml
 /.agents/
 /.codex/
 /AGENTS.md
+# claude-flow scratch dirs, anywhere in the tree (e.g. solitaire_engine/src/)
+.claude-flow/
 
 # Local token-saving helper scripts (peek/cargoclip/testfail/diffclip/etc.) —
 # inspection-only Go tools, not committed. Tracked scripts/*.sh and *.md stay.