Add perf testing aliases, knowledgebase sync, and ignore .claude dir

- Add yalp:perf and yalp:perf:stop aliases for YALP Core perf testing
- Add sync-knowledgebases function and kb-sync alias
- Add .claude/ to .gitignore

.gitignore

@@ -1,2 +1,3 @@
 # Local Natera config with account IDs, IPs, and internal paths (never commit)
 zshrc-natera.private
+.claude/

zshrc-natera

@@ -37,6 +37,27 @@ alias yalp:api='core && make local_run_api'
 alias yalp:psql='core && docker exec -it yalp-core-postgres psql -U postgres -d yalp_core_db'
 alias yalp:start='core && make local_db_start && make local_run_api'
 
+# YALP Core perf testing — close all boring tunnels, kill stale API, start perf DB + API (backgrounded)
+alias yalp:perf='core && boring list 2>/dev/null | tail -n +2 | awk "{print \$2}" | while read -r t; do boring close "$t" 2>/dev/null; done; lsof -ti :9258 | xargs kill 2>/dev/null; make local_container_db && make local_perf_db_start && make local_perf_run_api &>/dev/null & echo "YALP Core perf API starting on :9258 (pid $!)"'
+alias yalp:perf:stop='lsof -ti :9258 | xargs kill 2>/dev/null && echo "YALP Core perf API stopped" || echo "No process on :9258"'
+
+# Sync knowledgebase docs from all ~/work projects into ~/work/knowledgebases
+sync-knowledgebases() {
+  local src_base="$HOME/work"
+  local dest_base="$HOME/work/knowledgebases"
+  mkdir -p "$dest_base"
+  for dir in "$src_base"/*/docs/knowledgebase; do
+    [[ -d "$dir" ]] || continue
+    local project="${dir%/docs/knowledgebase}"
+    project="${project##*/}"
+    echo "Syncing $project..."
+    rm -rf "$dest_base/$project"
+    cp -R "$dir" "$dest_base/$project"
+  done
+  echo "Done."
+}
+alias kb-sync='sync-knowledgebases'
+
 # Natera repos use master as primary; rewrite "git switch main" to "git switch master"
 git() {
   if [[ "$1" == "switch" && "${2:-}" == "main" ]]; then