diff --git a/.gitignore b/.gitignore
index 86dbbc6b..c713bdc1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -15,6 +15,8 @@ artifacts/
 .hermes/
 # Agent findings and plans — not part of code history
 findings/
+# Claude Code worktrees and per-session state — harness-local, not code history
+.claude/
 # Mutation testing output
 mutants.out*/
 # Vim swap files