diff --git a/exercises/204_established_identities/scripts/load_only.sh b/exercises/204_established_identities/scripts/load_only.sh
new file mode 100755
index 0000000..dca0fc9
--- /dev/null
+++ b/exercises/204_established_identities/scripts/load_only.sh
@@ -0,0 +1,184 @@
+#!/bin/bash
+#
+# 20260602 ChatGPT
+# $Id$
+# $HeadURL$
+#
+# Example command lines:
+#
+#   ./load_only.sh --tbeams "CY"
+#   ./load_only.sh --tbeams "DAN"
+#   ./load_only.sh --tbeams "BOB"
+#   ./load_only.sh --tbeams "BOB CY DAN"
+#   ./load_only.sh --tbeams "bob,cy,dan"
+#
+# If pio/platformio is not in PATH:
+#
+#   ./load_only.sh --pio-bin "$HOME/pioenv/bin/platformio" --tbeams "DAN"
+#
+
+set -euo pipefail
+
+EXERCISE="/usr/local/src/microreticulum/microReticulumTbeam/exercises/204_established_identities"
+REMOTE_HOST="ryzdesk"
+TBEAMS_RAW=""
+PIO_BIN=""
+
+usage() {
+    cat <<'EOF'
+Usage:
+  ./load_only.sh --tbeams "CY"
+  ./load_only.sh --tbeams "BOB CY DAN"
+  ./load_only.sh --tbeams "bob,cy,dan"
+
+Required:
+  --tbeams      One or more of: AMY BOB CY DAN ED FLO GUY
+
+Optional:
+  --pio-bin     Full path to pio/platformio executable
+  --exercise    PlatformIO project directory
+  --remote      Remote build host, default: ryzdesk
+EOF
+}
+
+while [ "$#" -gt 0 ]
+do
+    case "$1" in
+        --tbeams)
+            shift
+            [ "$#" -gt 0 ] || { echo "ERROR: --tbeams requires a value" >&2; exit 1; }
+            TBEAMS_RAW="$1"
+            ;;
+        --pio-bin)
+            shift
+            [ "$#" -gt 0 ] || { echo "ERROR: --pio-bin requires a value" >&2; exit 1; }
+            PIO_BIN="$1"
+            ;;
+        --exercise)
+            shift
+            [ "$#" -gt 0 ] || { echo "ERROR: --exercise requires a value" >&2; exit 1; }
+            EXERCISE="$1"
+            ;;
+        --remote)
+            shift
+            [ "$#" -gt 0 ] || { echo "ERROR: --remote requires a value" >&2; exit 1; }
+            REMOTE_HOST="$1"
+            ;;
+        -h|--help)
+            usage
+            exit 0
+            ;;
+        *)
+            echo "ERROR: unknown option: $1" >&2
+            usage >&2
+            exit 1
+            ;;
+    esac
+    shift
+done
+
+if [ -z "$TBEAMS_RAW" ]; then
+    echo "ERROR: missing required option --tbeams" >&2
+    usage >&2
+    exit 1
+fi
+
+if [ ! -d "$EXERCISE" ]; then
+    echo "ERROR: EXERCISE directory not found: $EXERCISE" >&2
+    exit 1
+fi
+
+if [ ! -f "$EXERCISE/platformio.ini" ]; then
+    echo "ERROR: platformio.ini not found under: $EXERCISE" >&2
+    exit 1
+fi
+
+if [ -n "$PIO_BIN" ]; then
+    if [ ! -x "$PIO_BIN" ]; then
+        echo "ERROR: --pio-bin is not executable: $PIO_BIN" >&2
+        exit 1
+    fi
+else
+    if command -v pio >/dev/null 2>&1; then
+        PIO_BIN="$(command -v pio)"
+    elif command -v platformio >/dev/null 2>&1; then
+        PIO_BIN="$(command -v platformio)"
+    else
+        echo "ERROR: cannot find pio or platformio in PATH" >&2
+        echo "       Try: --pio-bin \"\$HOME/pioenv/bin/platformio\"" >&2
+        exit 1
+    fi
+fi
+
+echo "EXERCISE:    $EXERCISE"
+echo "REMOTE_HOST: $REMOTE_HOST"
+echo "PIO_BIN:     $PIO_BIN"
+echo
+
+#
+# Accept either:
+#   "BOB CY DAN"
+#   "bob,cy,dan"
+#
+TBEAMS_NORMALIZED="$(echo "$TBEAMS_RAW" | tr ',' ' ')"
+
+for env_raw in $TBEAMS_NORMALIZED
+do
+    env="$(echo "$env_raw" | tr '[:upper:]' '[:lower:]')"
+    ENV="$(echo "$env" | tr '[:lower:]' '[:upper:]')"
+
+    case "$env" in
+        amy|bob|cy|dan|ed|flo|guy)
+            ;;
+        *)
+            echo "ERROR: invalid T-Beam name: $env_raw" >&2
+            echo "       Allowed names: AMY BOB CY DAN ED FLO GUY" >&2
+            exit 1
+            ;;
+    esac
+
+    dev="/dev/ttyt${ENV}"
+    remote_build_dir="${EXERCISE}/.pio/build/${env}"
+    local_build_dir="${EXERCISE}/.pio/build/${env}"
+
+    if [ ! -e "$dev" ]; then
+        echo "ERROR: expected device not found for $ENV: $dev" >&2
+        exit 1
+    fi
+
+    if ! ssh "$REMOTE_HOST" "test -d '$remote_build_dir'"; then
+        echo "ERROR: remote build directory missing on ${REMOTE_HOST}: $remote_build_dir" >&2
+        exit 1
+    fi
+
+    if [ ! -d "$local_build_dir" ]; then
+        echo "Creating missing local build directory: $local_build_dir"
+        mkdir -p "$local_build_dir" || {
+            echo "ERROR: failed to create $local_build_dir" >&2
+            exit 1
+        }
+    fi
+
+    echo "===== copy built artifact tree for $env from $REMOTE_HOST ====="
+    rsync -a \
+      "${REMOTE_HOST}:${remote_build_dir}/" \
+      "${local_build_dir}/"
+
+    if [ ! -f "${local_build_dir}/firmware.bin" ] &&
+       [ ! -f "${local_build_dir}/firmware.elf" ]; then
+        echo "ERROR: copied build tree does not appear to contain firmware output:" >&2
+        echo "       $local_build_dir" >&2
+        exit 1
+    fi
+
+    echo "===== loader-only upload $ENV on $dev ====="
+    "$PIO_BIN" run \
+      -d "$EXERCISE" \
+      -e "$env" \
+      -t nobuild \
+      -t upload \
+      --upload-port "$dev"
+
+    echo "===== finished loader-only upload for $ENV ====="
+    echo
+done