diff --git a/package.json b/package.json
index f4af1438..10cf984c 100644
--- a/package.json
+++ b/package.json
@@ -12,6 +12,7 @@
   "main": "electron/main.cjs",
   "scripts": {
     "dev": "vite dev",
+    "dev:all": "bash scripts/dev-all.sh",
     "dev:remote": "VITE_AXIS_REMOTE=1 vite dev",
     "build": "vite build",
     "preview": "vite preview",
diff --git a/scripts/dev-all.sh b/scripts/dev-all.sh
new file mode 100755
index 00000000..65049642
--- /dev/null
+++ b/scripts/dev-all.sh
@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+# Launches the full local dev chain: forgefx-midi (build once) -> ForgeFX server (:5056) -> Axis (:5173).
+# Mirrors the manual sequence in README.md's "Run (dev)" section, plus the one-time builds that
+# section doesn't mention: forgefx-midi and forgefx-server both ship dist/ exports that Vite/tsx
+# resolve at import time, so a fresh sibling checkout needs a build before `npm run dev` will work.
+set -euo pipefail
+
+AXIS_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+FORGEFX_DIR="$AXIS_DIR/../ForgeFX/server"
+MIDI_DIR="$AXIS_DIR/../forgefx-midi"
+
+for d in "$FORGEFX_DIR" "$MIDI_DIR"; do
+  if [ ! -d "$d" ]; then
+    echo "error: missing sibling repo at $d" >&2
+    echo "  expected layout: code/{Axis,ForgeFX,forgefx-midi}" >&2
+    exit 1
+  fi
+done
+
+if [ ! -d "$MIDI_DIR/dist" ]; then
+  echo "==> forgefx-midi/dist missing — building once"
+  (cd "$MIDI_DIR" && npm install && npm run build)
+fi
+
+if [ ! -d "$FORGEFX_DIR/dist" ]; then
+  echo "==> ForgeFX/server/dist missing — building once (Axis's dev bundle resolves forgefx-server/runtime from here)"
+  (cd "$FORGEFX_DIR" && npm install && npm run build)
+fi
+
+echo "==> starting ForgeFX server (:5056)"
+(cd "$FORGEFX_DIR" && npm run dev) &
+FORGEFX_PID=$!
+
+cleanup() {
+  echo "==> stopping ForgeFX server"
+  kill "$FORGEFX_PID" 2>/dev/null || true
+  wait "$FORGEFX_PID" 2>/dev/null || true
+}
+trap cleanup EXIT INT TERM
+
+echo "==> starting Axis (:5173)"
+(cd "$AXIS_DIR" && npm run dev)