diff --git a/.gitignore b/.gitignore
index df3e929..b63db78 100644
--- a/.gitignore
+++ b/.gitignore
@@ -79,6 +79,9 @@ web_modules/
 # Phase 05 backfill cursor checkpoints — persisted locally, must not be committed.
 .backfill-cursor-*.json
 
+# Local Claude Code agent state (memory, session permissions). Never committed.
+.claude/
+
 # parcel-bundler cache (https://parceljs.org/)
 .cache
 .parcel-cache
diff --git a/biome.json b/biome.json
index ccba1f7..d9fc040 100644
--- a/biome.json
+++ b/biome.json
@@ -31,6 +31,7 @@
     "ignore": [
       "node_modules",
       ".wrangler",
+      ".claude",
       "dist",
       "coverage",
       "src/modules/loldle/champions.json",