diff --git a/.jules/bolt.md b/.jules/bolt.md
index 1a8e67d..7d0e07f 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -10,3 +10,6 @@
 ## 2024-05-23 - Shell Script Sourcing for Tests
 **Learning:** Shell scripts in `lib/` often run as standalone executables but must be sourceable for unit testing. Without a guard `if [[ "${BASH_SOURCE[0]}" == "${0}" ]];`, sourcing the script triggers its main execution logic (e.g., argument parsing), causing tests to fail immediately with exit codes or usage messages.
 **Action:** Always wrap the main execution logic of shell scripts in a guard block to ensure they can be safely sourced by test runners like BATS.
+## 2026-05-22 - [Random ID Generation Performance]
+**Learning:** Generating random IDs using `head -c 10 /dev/urandom | md5sum | cut -c 1-6` is significantly slower than using Bash builtins because it spawns three external processes per ID. In tight loops (e.g., creating many tasks), this becomes a bottleneck.
+**Action:** Use Bash builtins (e.g., `$RANDOM`) to generate random strings when cryptographic security is not required. It is approx 40x faster.
diff --git a/lib/task_manager/simple.sh b/lib/task_manager/simple.sh
index 493fa46..4b27c61 100755
--- a/lib/task_manager/simple.sh
+++ b/lib/task_manager/simple.sh
@@ -49,26 +49,16 @@ init_tasks() {
 
 # Generate a short random ID (similar to beads format)
 generate_id() {
-    if [ -e /dev/urandom ] && command -v md5sum >/dev/null; then
-        # Fast generation using system random source (Linux/macOS)
-        head -c 10 /dev/urandom | md5sum | cut -c 1-6
-    elif [ "$HAS_PYTHON3" -eq 1 ]; then
-        python3 -c "import uuid; print(str(uuid.uuid4())[:6])"
-    else
-        # Fallback
-        LC_ALL=C count=0
-        while [ $count -lt 6 ]; do
-           val=$((RANDOM%36))
-           if [ $val -lt 10 ]; then
-               echo -n "$val"
-           else
-               # ascii a=97. val-10+97
-               printf \\$(printf '%03o' $((val-10+97)))
-           fi
-           count=$((count+1))
-        done
-        echo ""
-    fi
+    # Optimized generation using Bash builtins (avoiding external process spawns)
+    # Generates a 6-character hex string (0-9, a-f)
+    local charset="0123456789abcdef"
+    local id=""
+    local i
+    for ((i=0; i<6; i++)); do
+        local rand=$((RANDOM % 16))
+        id="${id}${charset:$rand:1}"
+    done
+    echo "$id"
 }
 
 # Generate hierarchical task ID