security: remove AI tooling files — CLAUDE.md, .claude/

.gitignore

@@ -68,16 +68,9 @@ rustc-ice-*
 .ai-coordination/
 head.rs
 
-# Claude Code local files
-.claude/PROJECT_STATE.md
-.claude/SESSION_LOG.md
-.claude/hooks/
-.claude/settings.json
-.claude/CRITICAL_STATE.md
-.claude/simulation-lessons.md
-.claude/benchmark_checklist.md
-.claude/mainnet_fresh/
-.claude/test-asset-hub.toml
+# Claude Code / AI tooling — never commit
+.claude/
+CLAUDE.md
 
 # Regenerable artifacts (do not commit)
 chain_spec.json
@@ -123,7 +116,6 @@ tools/build-mainnet-chainspec.sh
 tools/runtime-upgrade/
 tools/wasm-crypto/
 tools/usdt-bridge/bridge_db.json
-.claude/domains-repositories
 
 # Internal operational/rebranding scripts (not for public)
 docs/rebrand_project.py