diff --git a/README.md b/README.md
index d4859f7..11ec0c2 100644
--- a/README.md
+++ b/README.md
@@ -93,3 +93,10 @@ Se añadió un flow en `data/flows.json` que usa Node-RED Dashboard para mostrar
 - Puedes automatizar la subida llamando directamente al endpoint; el servidor responde con el mismo JSON que consume el dashboard (o `{ error: \"...\" }` en caso de fallo).
 
 > Tip: si cambias el flujo desde el editor de Node-RED, recuerda exportarlo o guardar el nuevo `flows.json` para versionarlo aquí.
+
+### Biblioteca y deduplicación
+
+- Cada análisis queda persistido en `data/als-library.json` junto con su hash MD5 y todos los metadatos.
+- Si intentas subir el mismo `.als`, el flujo detecta el hash duplicado, responde `409` y el dashboard avisa sin sobrescribir la biblioteca.
+- Para consultar el inventario (por ejemplo, desde una IA) usa `GET /als/library`; el endpoint devuelve el arreglo completo de proyectos almacenados.
+- Como el archivo vive dentro de `/data`, puedes versionarlo o respaldarlo fácilmente según tu flujo de trabajo.
diff --git a/data/als-library.json b/data/als-library.json
new file mode 100644
index 0000000..ae1444e
--- /dev/null
+++ b/data/als-library.json
@@ -0,0 +1,173 @@
+[
+  {
+    "hash": "9dbed77293415a951c43101ef30873d4",
+    "projectName": "GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL).als",
+    "meta": {
+      "creator": "Ableton Live 12.2",
+      "version": "5.12.0_12203",
+      "revision": "1c7a2c5dacd710ba28150f2c1534c22b1c158263",
+      "fileName": "GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL).als",
+      "sizeBytes": 6685879,
+      "sizeHuman": "6.4 MB"
+    },
+    "liveSet": {
+      "tempo": 124,
+      "loopLengthBeats": 272,
+      "durationSeconds": 131.61290322580646,
+      "durationHuman": "2:12",
+      "loopStart": 0,
+      "scenes": []
+    },
+    "tracks": [
+      {
+        "name": "VOCAL",
+        "type": "Audio",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "KICK #1",
+        "type": "Audio",
+        "deviceCount": 0,
+        "color": "22"
+      },
+      {
+        "name": "5-Audio",
+        "type": "Audio",
+        "deviceCount": 1,
+        "color": "22"
+      },
+      {
+        "name": "6-Audio",
+        "type": "Audio",
+        "deviceCount": 2,
+        "color": "22"
+      },
+      {
+        "name": "KSMR FX",
+        "type": "Audio",
+        "deviceCount": 1,
+        "color": "22"
+      },
+      {
+        "name": "Clap",
+        "type": "MIDI",
+        "deviceCount": 1,
+        "color": "22"
+      },
+      {
+        "name": "9-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 4,
+        "color": "22"
+      },
+      {
+        "name": "10-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 2,
+        "color": "22"
+      },
+      {
+        "name": "12-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "13-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 2,
+        "color": "22"
+      },
+      {
+        "name": "14-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 2,
+        "color": "22"
+      },
+      {
+        "name": "15-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "16-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "17-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "18-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 5,
+        "color": "22"
+      },
+      {
+        "name": "19-Serum 2",
+        "type": "MIDI",
+        "deviceCount": 2,
+        "color": "22"
+      },
+      {
+        "name": "Drums",
+        "type": "Grupo",
+        "deviceCount": 1,
+        "color": "22"
+      },
+      {
+        "name": "LEAD",
+        "type": "Grupo",
+        "deviceCount": 3,
+        "color": "22"
+      },
+      {
+        "name": "Bass",
+        "type": "Grupo",
+        "deviceCount": 1,
+        "color": "22"
+      }
+    ],
+    "stats": {
+      "audio": 5,
+      "midi": 11,
+      "group": 3,
+      "totalTracks": 19,
+      "devices": 42,
+      "scenes": 0,
+      "samples": 8
+    },
+    "samples": {
+      "total": 8,
+      "relative": [
+        "Samples/Imported/RUFUS DU SOL - In the Moment (Adriatique Remix) Acapella.mp3",
+        "Samples/Processed/Bounce/Bounce KICK #1 [2025-08-30 144250]-3.wav",
+        "Samples/Recorded/12-Audio 0001 [2025-08-30 143952].wav",
+        "Presets/Audio Effects/Audio Effect Rack/Filter HI and Low.adg",
+        "Samples/Recorded/12-Audio 0001 [2025-08-30 144108].wav",
+        "Samples/Imported/Clap Fx.wav",
+        "Samples/Imported/Clap.wav",
+        "Swing and Groove/Swing/Swing 16-99.agr"
+      ],
+      "absolute": [
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Imported/RUFUS DU SOL - In the Moment (Adriatique Remix) Acapella.mp3",
+        "C:/VST2/Proximity-x64.dll",
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Processed/Bounce/Bounce KICK #1 [2025-08-30 144250]-3.wav",
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Recorded/12-Audio 0001 [2025-08-30 143952].wav",
+        "C:/Users/novik/OneDrive/Documenten/Ableton/User Library/Presets/Audio Effects/Audio Effect Rack/Filter HI and Low.adg",
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Recorded/12-Audio 0001 [2025-08-30 144108].wav",
+        "C:/VST2/Fabfilter/FabFilter Pro-Q 4.dll",
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Imported/Clap Fx.wav",
+        "C:/Users/novik/Desktop/YOUTUBE RUFUS DUU SOL & ARTBAT/GHOSTPRODUCTION.PRO (ABLETON LIVE) (Style RUFUS DUU SOL) Project/Samples/Imported/Clap.wav",
+        "C:/VST2/Fabfilter/FabFilter Pro-C 2.dll"
+      ]
+    },
+    "storedAt": "2025-12-01T02:46:38.916Z"
+  }
+]
\ No newline at end of file
diff --git a/data/flows.json b/data/flows.json
index 8c00270..4db4aaa 100644
--- a/data/flows.json
+++ b/data/flows.json
@@ -45,14 +45,14 @@
     "order": 0,
     "width": "12",
     "height": "7",
-    "format": "<md-card class=\"als-upload-card\">\n  <md-card-title>\n    <span class=\"md-headline\">Inspector de proyectos ALS</span>\n  </md-card-title>\n  <md-card-content>\n    <p>Selecciona un archivo <code>.als</code> de Ableton Live. El an\u00e1lisis se realiza en el servidor a trav\u00e9s de un endpoint HTTP dedicado.</p>\n    <input type=\"file\" accept=\".als\" id=\"als-input-{{$id}}\" style=\"margin-top:12px\"/>\n    <p class=\"md-caption\" ng-if=\"statusText\">{{statusText}}</p>\n  </md-card-content>\n</md-card>\n<script>\n(function(scope) {\n  const inputId = 'als-input-' + scope.$id;\n  function setStatus(text) {\n    scope.$applyAsync(function() { scope.statusText = text; });\n  }\n  function uploadFile(file) {\n    if (!file) { return; }\n    setStatus('Subiendo ' + file.name + '...');\n    const reader = new FileReader();\n    reader.onload = function(evt) {\n      setStatus('Analizando ' + file.name + '...');\n      fetch('/als/upload', {\n        method: 'POST',\n        headers: { 'Content-Type': 'application/json' },\n        body: JSON.stringify({\n          filename: file.name,\n          size: file.size,\n          data: evt.target.result\n        })\n      })\n      .then(async (res) => {\n        const text = await res.text();\n        let payload = null;\n        try { payload = text ? JSON.parse(text) : {}; } catch (err) {}\n        if (!res.ok) {\n          throw new Error(payload && payload.error ? payload.error : ('HTTP ' + res.status));\n        }\n        setStatus('An\u00e1lisis completado para ' + file.name);\n        const inputEl = document.getElementById(inputId);\n        if (inputEl) { inputEl.value = null; }\n        return payload;\n      })\n      .catch((err) => {\n        console.error('ALS upload error', err);\n        setStatus('Error analizando el archivo: ' + (err.message || 'desconocido'));\n      });\n    };\n    reader.onerror = function(e) {\n      console.error('No se pudo leer el archivo ALS', e);\n      setStatus('No se pudo leer el archivo.');\n    };\n    reader.readAsDataURL(file);\n  }\n  function bindInput() {\n    const input = document.getElementById(inputId);\n    if (!input) { return; }\n    input.addEventListener('change', function(evt) {\n      uploadFile(evt.target.files[0]);\n    });\n  }\n  setTimeout(bindInput, 0);\n})(scope);\n</script>",
+    "format": "<md-card class=\"als-upload-card\">\n  <md-card-title>\n    <span class=\"md-headline\">Inspector de proyectos ALS</span>\n  </md-card-title>\n  <md-card-content>\n    <p>Selecciona un archivo <code>.als</code>. Se enviar\u00e1 al endpoint <code>/als/upload</code> y, si es nuevo, se almacenar\u00e1 en la biblioteca.</p>\n    <input type=\"file\" accept=\".als\" id=\"als-input-{{$id}}\" style=\"margin-top:12px\" />\n    <p class=\"md-caption\" ng-if=\"statusText\">{{statusText}}</p>\n  </md-card-content>\n</md-card>\n<script>\n(function(scope) {\n  const inputId = 'als-input-' + scope.$id;\n  function setStatus(text) {\n    scope.$applyAsync(function() { scope.statusText = text; });\n  }\n  function uploadFile(file) {\n    if (!file) { return; }\n    setStatus('Subiendo ' + file.name + '...');\n    const reader = new FileReader();\n    reader.onload = function(evt) {\n      setStatus('Analizando ' + file.name + '...');\n      fetch('/als/upload', {\n        method: 'POST',\n        headers: { 'Content-Type': 'application/json' },\n        body: JSON.stringify({ filename: file.name, size: file.size, data: evt.target.result })\n      })\n      .then(async (res) => {\n        const text = await res.text();\n        let payload = null;\n        try { payload = text ? JSON.parse(text) : {}; } catch (err) {}\n        if (!res.ok) {\n          throw new Error(payload && payload.error ? payload.error : ('HTTP ' + res.status));\n        }\n        setStatus('An\u00e1lisis guardado para ' + (payload.projectName || file.name));\n        const inputEl = document.getElementById(inputId);\n        if (inputEl) { inputEl.value = null; }\n        return payload;\n      })\n      .catch((err) => {\n        console.error('ALS upload error', err);\n        setStatus('Error: ' + (err.message || 'del servidor'));\n      });\n    };\n    reader.onerror = function(e) {\n      console.error('No se pudo leer el archivo ALS', e);\n      setStatus('No se pudo leer el archivo.');\n    };\n    reader.readAsDataURL(file);\n  }\n  function bindInput() {\n    const input = document.getElementById(inputId);\n    if (!input) { return; }\n    input.addEventListener('change', function(evt) {\n      uploadFile(evt.target.files[0]);\n    });\n  }\n  setTimeout(bindInput, 0);\n})(scope);\n</script>",
     "storeOutMessages": false,
     "fwdInMessages": false,
     "resendOnRefresh": true,
     "templateScope": "local",
     "className": "",
-    "x": 250,
-    "y": 120,
+    "x": 230,
+    "y": 100,
     "wires": []
   },
   {
@@ -64,13 +64,13 @@
     "order": 0,
     "width": "12",
     "height": "14",
-    "format": "<md-card class=\"als-summary-card\">\n  <md-card-title>\n    <span class=\"md-headline\">Resumen del proyecto</span>\n  </md-card-title>\n  <md-card-content ng-if=\"msg.payload\">\n    <div class=\"summary-grid\">\n      <div class=\"stat\">\n        <div class=\"label\">Proyecto</div>\n        <div class=\"value\">{{msg.payload.projectName}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Tempo</div>\n        <div class=\"value\">{{msg.payload.liveSet.tempo || 'N/D'}} BPM</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Duraci\u00f3n aprox.</div>\n        <div class=\"value\">{{msg.payload.liveSet.durationHuman || 'N/D'}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Escenas</div>\n        <div class=\"value\">{{msg.payload.stats.scenes}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Samples</div>\n        <div class=\"value\">{{msg.payload.samples.total}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Dispositivos</div>\n        <div class=\"value\">{{msg.payload.stats.devices}}</div>\n      </div>\n    </div>\n    <div class=\"meta-block\">\n      <p><strong>Versi\u00f3n:</strong> {{msg.payload.meta.creator || 'Desconocido'}} {{msg.payload.meta.version}}</p>\n      <p><strong>Archivo:</strong> {{msg.payload.meta.fileName || '\u2014'}} \u00b7 {{msg.payload.meta.sizeHuman}}</p>\n    </div>\n    <h4>Tracks ({{msg.payload.stats.totalTracks}})</h4>\n    <div class=\"track-list\" ng-if=\"msg.payload.tracks.length\">\n      <div class=\"track\" ng-repeat=\"track in msg.payload.tracks\">\n        <div class=\"track-name\">{{track.name || '(sin nombre)'}} </div>\n        <div class=\"track-meta\">{{track.type}} \u00b7 {{track.deviceCount}} dispositivos</div>\n      </div>\n    </div>\n    <h4 ng-if=\"msg.payload.liveSet.scenes.length\">Escenas</h4>\n    <md-list ng-if=\"msg.payload.liveSet.scenes.length\">\n      <md-list-item ng-repeat=\"scene in msg.payload.liveSet.scenes\">\n        <p>{{scene || '(sin nombre)'}} </p>\n      </md-list-item>\n    </md-list>\n    <h4 ng-if=\"msg.payload.samples.relative.length\">Muestras referenciadas</h4>\n    <md-list ng-if=\"msg.payload.samples.relative.length\">\n      <md-list-item ng-repeat=\"path in msg.payload.samples.relative\">\n        <p>{{path}}</p>\n      </md-list-item>\n    </md-list>\n  </md-card-content>\n  <md-card-content ng-if=\"!msg.payload && !msg.error\">\n    <p>Sube un archivo <code>.als</code> para ver el an\u00e1lisis.</p>\n  </md-card-content>\n  <md-card-content ng-if=\"msg.error\">\n    <p class=\"md-warn\">{{msg.error}}</p>\n  </md-card-content>\n</md-card>\n<style>\n  .als-summary-card h4 { margin-top: 16px; }\n  .summary-grid { display: flex; flex-wrap: wrap; gap: 12px; }\n  .summary-grid .stat { flex: 1 1 180px; background: rgba(0,0,0,0.05); padding: 8px 12px; border-radius: 6px; }\n  .summary-grid .label { font-size: 0.8em; text-transform: uppercase; color: #666; }\n  .summary-grid .value { font-size: 1.1em; font-weight: 600; }\n  .meta-block { margin-top: 12px; }\n  .track-list .track { padding: 6px 0; border-bottom: 1px solid rgba(0,0,0,0.08); }\n  .track-name { font-weight: 600; }\n  .track-meta { font-size: 0.85em; color: #555; }\n</style>",
+    "format": "<md-card class=\"als-summary-card\">\n  <md-card-title>\n    <span class=\"md-headline\">Resumen del proyecto</span>\n  </md-card-title>\n  <md-card-content ng-if=\"msg.payload\">\n    <div class=\"summary-grid\">\n      <div class=\"stat\">\n        <div class=\"label\">Proyecto</div>\n        <div class=\"value\">{{msg.payload.projectName}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Tempo</div>\n        <div class=\"value\">{{msg.payload.liveSet.tempo || 'N/D'}} BPM</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Duraci\u00f3n aprox.</div>\n        <div class=\"value\">{{msg.payload.liveSet.durationHuman || 'N/D'}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Escenas</div>\n        <div class=\"value\">{{msg.payload.stats.scenes}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Samples</div>\n        <div class=\"value\">{{msg.payload.samples.total}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Dispositivos</div>\n        <div class=\"value\">{{msg.payload.stats.devices}}</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Hash</div>\n        <div class=\"value\">{{msg.payload.hash | limitTo:12}}\u2026</div>\n      </div>\n      <div class=\"stat\">\n        <div class=\"label\">Guardado</div>\n        <div class=\"value\">{{msg.payload.storedAt | date:'medium'}}</div>\n      </div>\n    </div>\n    <div class=\"meta-block\">\n      <p><strong>Versi\u00f3n:</strong> {{msg.payload.meta.creator || 'Desconocido'}} {{msg.payload.meta.version}}</p>\n      <p><strong>Archivo:</strong> {{msg.payload.meta.fileName || '\u2014'}} \u00b7 {{msg.payload.meta.sizeHuman}}</p>\n    </div>\n    <h4>Tracks ({{msg.payload.stats.totalTracks}})</h4>\n    <div class=\"track-list\" ng-if=\"msg.payload.tracks.length\">\n      <div class=\"track\" ng-repeat=\"track in msg.payload.tracks\">\n        <div class=\"track-name\">{{track.name || '(sin nombre)'}} </div>\n        <div class=\"track-meta\">{{track.type}} \u00b7 {{track.deviceCount}} dispositivos</div>\n      </div>\n    </div>\n    <h4 ng-if=\"msg.payload.liveSet.scenes.length\">Escenas</h4>\n    <md-list ng-if=\"msg.payload.liveSet.scenes.length\">\n      <md-list-item ng-repeat=\"scene in msg.payload.liveSet.scenes\">\n        <p>{{scene || '(sin nombre)'}} </p>\n      </md-list-item>\n    </md-list>\n    <h4 ng-if=\"msg.payload.samples.relative.length\">Muestras referenciadas</h4>\n    <md-list ng-if=\"msg.payload.samples.relative.length\">\n      <md-list-item ng-repeat=\"path in msg.payload.samples.relative\">\n        <p>{{path}}</p>\n      </md-list-item>\n    </md-list>\n  </md-card-content>\n  <md-card-content ng-if=\"!msg.payload && !msg.error\">\n    <p>Sube un archivo <code>.als</code> para ver el an\u00e1lisis y guardarlo.</p>\n  </md-card-content>\n  <md-card-content ng-if=\"msg.error\">\n    <p class=\"md-warn\">{{msg.error}}</p>\n  </md-card-content>\n</md-card>\n<style>\n  .als-summary-card h4 { margin-top: 16px; }\n  .summary-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }\n  .summary-grid .stat { background: rgba(0,0,0,0.05); padding: 8px 12px; border-radius: 6px; }\n  .summary-grid .label { font-size: 0.8em; text-transform: uppercase; color: #666; }\n  .summary-grid .value { font-size: 1.1em; font-weight: 600; }\n  .meta-block { margin-top: 12px; }\n  .track-list .track { padding: 6px 0; border-bottom: 1px solid rgba(0,0,0,0.08); }\n  .track-name { font-weight: 600; }\n  .track-meta { font-size: 0.85em; color: #555; }\n</style>",
     "storeOutMessages": false,
     "fwdInMessages": false,
     "resendOnRefresh": true,
     "templateScope": "local",
     "className": "",
-    "x": 1170,
+    "x": 1240,
     "y": 320,
     "wires": []
   },
@@ -83,7 +83,7 @@
     "method": "post",
     "upload": false,
     "swaggerDoc": "",
-    "x": 210,
+    "x": 180,
     "y": 320,
     "wires": [
       [
@@ -102,7 +102,7 @@
     "initialize": "",
     "finalize": "",
     "libs": [],
-    "x": 480,
+    "x": 460,
     "y": 320,
     "wires": [
       [
@@ -118,7 +118,7 @@
     "type": "function",
     "z": "f68df1c4d2e4e1a9",
     "name": "Inspector ALS",
-    "func": "function toArray(value) {\n    if (!value) { return []; }\n    return Array.isArray(value) ? value : [value];\n}\nfunction readName(entity) {\n    if (!entity || !entity.Name) { return ''; }\n    const name = entity.Name;\n    if (name.EffectiveName && name.EffectiveName.Value) { return name.EffectiveName.Value; }\n    if (name.UserName && name.UserName.Value) { return name.UserName.Value; }\n    if (name.Value) { return name.Value; }\n    return '';\n}\nfunction countDevices(node) {\n    if (!node || typeof node !== 'object') { return 0; }\n    let total = 0;\n    Object.values(node).forEach((value) => {\n        if (!value) { return; }\n        if (Array.isArray(value)) {\n            total += value.length;\n        } else if (typeof value === 'object') {\n            total += 1;\n        }\n    });\n    return total;\n}\nfunction humanFileSize(bytes) {\n    if (!bytes && bytes !== 0) { return 'N/D'; }\n    if (bytes < 1024) { return bytes + ' B'; }\n    const units = ['KB', 'MB', 'GB'];\n    let value = bytes / 1024;\n    let unit = units[0];\n    for (let i = 0; i < units.length; i += 1) {\n        unit = units[i];\n        if (value < 1024 || i === units.length - 1) { break; }\n        value /= 1024;\n    }\n    return value.toFixed(1) + ' ' + unit;\n}\nfunction secondsToHuman(seconds) {\n    if (!seconds && seconds !== 0) { return null; }\n    const total = Math.round(seconds);\n    const mins = Math.floor(total / 60);\n    const secs = String(total % 60).padStart(2, '0');\n    return mins + ':' + secs;\n}\nfunction handlePathField(field, bucket) {\n    if (!field) { return; }\n    if (typeof field === 'string') {\n        bucket.add(field);\n    } else if (Array.isArray(field)) {\n        field.forEach((item) => handlePathField(item, bucket));\n    } else if (typeof field === 'object' && field.Value) {\n        bucket.add(field.Value);\n    }\n}\nfunction collectRefs(node, bag) {\n    if (!node || typeof node !== 'object') { return; }\n    handlePathField(node.RelativePath, bag.relative);\n    handlePathField(node.Path, bag.absolute);\n    Object.values(node).forEach((value) => {\n        if (Array.isArray(value)) {\n            value.forEach((item) => collectRefs(item, bag));\n        } else if (value && typeof value === 'object') {\n            collectRefs(value, bag);\n        }\n    });\n}\nif (!Buffer.isBuffer(msg.payload)) {\n    msg.error = 'No se recibi\u00f3 un Buffer con el ALS.';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    return msg;\n}\nconst originalSize = msg.size || msg.payload.length;\nlet xmlBuffer;\ntry {\n    xmlBuffer = zlib.gunzipSync(msg.payload);\n} catch (err) {\n    msg.error = 'El archivo no parece ser un ALS v\u00e1lido (fall\u00f3 la descompresi\u00f3n).';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    node.error(err, msg);\n    return msg;\n}\nlet doc;\ntry {\n    const ParserClass = fastXmlParser.XMLParser || fastXmlParser;\n    const parser = new ParserClass({\n        ignoreAttributes: false,\n        attributeNamePrefix: '',\n        parseAttributeValue: false,\n        allowBooleanAttributes: true\n    });\n    doc = parser.parse(xmlBuffer.toString('utf8'));\n} catch (err) {\n    msg.error = 'No se pudo parsear el XML del proyecto.';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    node.error(err, msg);\n    return msg;\n}\nconst ableton = doc?.Ableton || {};\nconst liveSet = ableton.LiveSet || {};\nconst projectName = readName(liveSet) || msg.filename || 'Proyecto sin nombre';\nconst tempoValue = liveSet?.MainTrack?.DeviceChain?.Mixer?.Tempo?.Manual?.Value\n    ?? liveSet?.DeviceChain?.Mixer?.Tempo?.Manual?.Value\n    ?? null;\nconst tempo = tempoValue ? Number(tempoValue) : null;\nconst loopLengthBeats = Number(liveSet?.Transport?.LoopLength?.Value) || null;\nconst durationSeconds = tempo && loopLengthBeats ? (loopLengthBeats * 60) / tempo : null;\nconst trackBuckets = [\n    { key: 'AudioTrack', label: 'Audio', stat: 'audio' },\n    { key: 'MidiTrack', label: 'MIDI', stat: 'midi' },\n    { key: 'GroupTrack', label: 'Grupo', stat: 'group' }\n];\nconst stats = { audio: 0, midi: 0, group: 0, devices: 0 };\nconst tracks = [];\nconst trackNode = liveSet?.Tracks || {};\ntrackBuckets.forEach((bucket) => {\n    toArray(trackNode[bucket.key]).forEach((track) => {\n        stats[bucket.stat] += 1;\n        const deviceCount = countDevices(track?.DeviceChain?.DeviceChain?.Devices);\n        stats.devices += deviceCount;\n        tracks.push({\n            name: readName(track) || bucket.label + ' ' + stats[bucket.stat],\n            type: bucket.label,\n            deviceCount,\n            color: track?.Color?.Value || null\n        });\n    });\n});\nconst scenes = toArray(liveSet?.Scenes?.Scene)\n    .map((scene) => readName(scene))\n    .filter((name) => name !== '');\nconst sampleRefs = { relative: new Set(), absolute: new Set() };\ncollectRefs(liveSet, sampleRefs);\nconst sampleSummary = {\n    total: sampleRefs.relative.size || sampleRefs.absolute.size,\n    relative: Array.from(sampleRefs.relative).slice(0, 15),\n    absolute: Array.from(sampleRefs.absolute).slice(0, 10)\n};\nmsg.analysis = {\n    projectName,\n    meta: {\n        creator: ableton.Creator || null,\n        version: [ableton.MajorVersion, ableton.MinorVersion].filter(Boolean).join('.'),\n        revision: ableton.Revision || null,\n        fileName: msg.filename || null,\n        sizeBytes: originalSize,\n        sizeHuman: humanFileSize(originalSize)\n    },\n    liveSet: {\n        tempo,\n        loopLengthBeats,\n        durationSeconds,\n        durationHuman: secondsToHuman(durationSeconds),\n        loopStart: Number(liveSet?.Transport?.LoopStart?.Value) || 0,\n        scenes\n    },\n    tracks,\n    stats: {\n        audio: stats.audio,\n        midi: stats.midi,\n        group: stats.group,\n        totalTracks: tracks.length,\n        devices: stats.devices,\n        scenes: scenes.length,\n        samples: sampleSummary.total\n    },\n    samples: sampleSummary\n};\nmsg.error = null;\nmsg.statusCode = 200;\nmsg.statusText = 'An\u00e1lisis actualizado';\nreturn msg;",
+    "func": "function toArray(value) {\n    if (!value) { return []; }\n    return Array.isArray(value) ? value : [value];\n}\nfunction readName(entity) {\n    if (!entity || !entity.Name) { return ''; }\n    const name = entity.Name;\n    if (name.EffectiveName && name.EffectiveName.Value) { return name.EffectiveName.Value; }\n    if (name.UserName && name.UserName.Value) { return name.UserName.Value; }\n    if (name.Value) { return name.Value; }\n    return '';\n}\nfunction countDevices(node) {\n    if (!node || typeof node !== 'object') { return 0; }\n    let total = 0;\n    Object.values(node).forEach((value) => {\n        if (!value) { return; }\n        if (Array.isArray(value)) {\n            total += value.length;\n        } else if (typeof value === 'object') {\n            total += 1;\n        }\n    });\n    return total;\n}\nfunction humanFileSize(bytes) {\n    if (!bytes && bytes !== 0) { return 'N/D'; }\n    if (bytes < 1024) { return bytes + ' B'; }\n    const units = ['KB', 'MB', 'GB', 'TB'];\n    let value = bytes / 1024;\n    let unit = units[0];\n    for (let i = 0; i < units.length; i += 1) {\n        unit = units[i];\n        if (value < 1024 || i === units.length - 1) { break; }\n        value /= 1024;\n    }\n    return value.toFixed(1) + ' ' + unit;\n}\nfunction secondsToHuman(seconds) {\n    if (!seconds && seconds !== 0) { return null; }\n    const total = Math.round(seconds);\n    const mins = Math.floor(total / 60);\n    const secs = String(total % 60).padStart(2, '0');\n    return mins + ':' + secs;\n}\nfunction handlePathField(field, bucket) {\n    if (!field) { return; }\n    if (typeof field === 'string') {\n        bucket.add(field);\n    } else if (Array.isArray(field)) {\n        field.forEach((item) => handlePathField(item, bucket));\n    } else if (typeof field === 'object' && field.Value) {\n        bucket.add(field.Value);\n    }\n}\nfunction collectRefs(node, bag) {\n    if (!node || typeof node !== 'object') { return; }\n    handlePathField(node.RelativePath, bag.relative);\n    handlePathField(node.Path, bag.absolute);\n    Object.values(node).forEach((value) => {\n        if (Array.isArray(value)) {\n            value.forEach((item) => collectRefs(item, bag));\n        } else if (value && typeof value === 'object') {\n            collectRefs(value, bag);\n        }\n    });\n}\nif (!Buffer.isBuffer(msg.payload)) {\n    msg.error = 'No se recibi\u00f3 un Buffer con el ALS.';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    return msg;\n}\nconst originalSize = msg.size || msg.payload.length;\nlet xmlBuffer;\ntry {\n    xmlBuffer = zlib.gunzipSync(msg.payload);\n} catch (err) {\n    msg.error = 'El archivo no parece ser un ALS v\u00e1lido (fall\u00f3 la descompresi\u00f3n).';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    node.error(err, msg);\n    return msg;\n}\nlet doc;\ntry {\n    const ParserClass = fastXmlParser.XMLParser || fastXmlParser;\n    const parser = new ParserClass({\n        ignoreAttributes: false,\n        attributeNamePrefix: '',\n        parseAttributeValue: false,\n        allowBooleanAttributes: true\n    });\n    doc = parser.parse(xmlBuffer.toString('utf8'));\n} catch (err) {\n    msg.error = 'No se pudo parsear el XML del proyecto.';\n    msg.analysis = null;\n    msg.statusCode = 400;\n    node.error(err, msg);\n    return msg;\n}\nconst ableton = doc?.Ableton || {};\nconst liveSet = ableton.LiveSet || {};\nconst projectName = readName(liveSet) || msg.filename || 'Proyecto sin nombre';\nconst tempoValue = liveSet?.MainTrack?.DeviceChain?.Mixer?.Tempo?.Manual?.Value\n    ?? liveSet?.DeviceChain?.Mixer?.Tempo?.Manual?.Value\n    ?? null;\nconst tempo = tempoValue ? Number(tempoValue) : null;\nconst loopLengthBeats = Number(liveSet?.Transport?.LoopLength?.Value) || null;\nconst durationSeconds = tempo && loopLengthBeats ? (loopLengthBeats * 60) / tempo : null;\nconst trackBuckets = [\n    { key: 'AudioTrack', label: 'Audio', stat: 'audio' },\n    { key: 'MidiTrack', label: 'MIDI', stat: 'midi' },\n    { key: 'GroupTrack', label: 'Grupo', stat: 'group' }\n];\nconst stats = { audio: 0, midi: 0, group: 0, devices: 0 };\nconst tracks = [];\nconst trackNode = liveSet?.Tracks || {};\ntrackBuckets.forEach((bucket) => {\n    toArray(trackNode[bucket.key]).forEach((track) => {\n        stats[bucket.stat] += 1;\n        const deviceCount = countDevices(track?.DeviceChain?.DeviceChain?.Devices);\n        stats.devices += deviceCount;\n        tracks.push({\n            name: readName(track) || bucket.label + ' ' + stats[bucket.stat],\n            type: bucket.label,\n            deviceCount,\n            color: track?.Color?.Value || null\n        });\n    });\n});\nconst scenes = toArray(liveSet?.Scenes?.Scene)\n    .map((scene) => readName(scene))\n    .filter((name) => name !== '');\nconst sampleRefs = { relative: new Set(), absolute: new Set() };\ncollectRefs(liveSet, sampleRefs);\nconst sampleSummary = {\n    total: sampleRefs.relative.size || sampleRefs.absolute.size,\n    relative: Array.from(sampleRefs.relative).slice(0, 15),\n    absolute: Array.from(sampleRefs.absolute).slice(0, 10)\n};\nconst hash = crypto.createHash('md5').update(msg.payload).digest('hex');\nmsg.analysis = {\n    hash,\n    projectName,\n    meta: {\n        creator: ableton.Creator || null,\n        version: [ableton.MajorVersion, ableton.MinorVersion].filter(Boolean).join('.'),\n        revision: ableton.Revision || null,\n        fileName: msg.filename || null,\n        sizeBytes: originalSize,\n        sizeHuman: humanFileSize(originalSize)\n    },\n    liveSet: {\n        tempo,\n        loopLengthBeats,\n        durationSeconds,\n        durationHuman: secondsToHuman(durationSeconds),\n        loopStart: Number(liveSet?.Transport?.LoopStart?.Value) || 0,\n        scenes\n    },\n    tracks,\n    stats: {\n        audio: stats.audio,\n        midi: stats.midi,\n        group: stats.group,\n        totalTracks: tracks.length,\n        devices: stats.devices,\n        scenes: scenes.length,\n        samples: sampleSummary.total\n    },\n    samples: sampleSummary\n};\nmsg.error = null;\nmsg.statusCode = 200;\nmsg.statusText = 'An\u00e1lisis generado';\nreturn msg;",
     "outputs": 1,
     "noerr": 0,
     "initialize": "",
@@ -131,9 +131,37 @@
       {
         "var": "zlib",
         "module": "zlib"
+      },
+      {
+        "var": "crypto",
+        "module": "crypto"
       }
     ],
-    "x": 760,
+    "x": 750,
+    "y": 300,
+    "wires": [
+      [
+        "b0b4475c1cd1a2f1"
+      ]
+    ]
+  },
+  {
+    "id": "b0b4475c1cd1a2f1",
+    "type": "function",
+    "z": "f68df1c4d2e4e1a9",
+    "name": "Registrar ALS",
+    "func": "const DB_PATH = '/data/als-library.json';\nfunction readLibrary() {\n    try {\n        const raw = fs.readFileSync(DB_PATH, 'utf8');\n        return raw ? JSON.parse(raw) : [];\n    } catch (err) {\n        if (err.code === 'ENOENT') { return []; }\n        node.error('No se pudo leer la biblioteca ALS', err);\n        throw err;\n    }\n}\nfunction writeLibrary(data) {\n    fs.writeFileSync(DB_PATH, JSON.stringify(data, null, 2));\n}\nif (!msg.analysis || !msg.analysis.hash) {\n    msg.error = 'No se pudo guardar el an\u00e1lisis (hash faltante).';\n    msg.statusCode = msg.statusCode || 400;\n    msg.analysis = null;\n    return msg;\n}\nconst library = readLibrary();\nconst existing = library.find((entry) => entry.hash === msg.analysis.hash);\nif (existing) {\n    msg.error = 'Este archivo ALS ya fue registrado anteriormente.';\n    msg.statusCode = 409;\n    msg.statusText = 'Archivo duplicado';\n    msg.analysis = null;\n    return msg;\n}\nconst record = {\n    ...msg.analysis,\n    storedAt: new Date().toISOString()\n};\nlibrary.push(record);\nwriteLibrary(library);\nmsg.analysis = record;\nmsg.error = null;\nmsg.statusCode = 200;\nmsg.statusText = 'An\u00e1lisis almacenado';\nreturn msg;",
+    "outputs": 1,
+    "noerr": 0,
+    "initialize": "",
+    "finalize": "",
+    "libs": [
+      {
+        "var": "fs",
+        "module": "fs"
+      }
+    ],
+    "x": 980,
     "y": 300,
     "wires": [
       [
@@ -153,8 +181,8 @@
     "initialize": "",
     "finalize": "",
     "libs": [],
-    "x": 780,
-    "y": 380,
+    "x": 760,
+    "y": 400,
     "wires": [
       [
         "d2bc9fd9a04fde13",
@@ -173,8 +201,8 @@
     "initialize": "",
     "finalize": "",
     "libs": [],
-    "x": 1050,
-    "y": 260,
+    "x": 1240,
+    "y": 240,
     "wires": [
       [
         "3c1fe83bb7f4a173"
@@ -188,8 +216,8 @@
     "name": "",
     "statusCode": "",
     "headers": {},
-    "x": 1250,
-    "y": 260,
+    "x": 1440,
+    "y": 240,
     "wires": []
   },
   {
@@ -203,8 +231,8 @@
     "initialize": "",
     "finalize": "",
     "libs": [],
-    "x": 1050,
-    "y": 360,
+    "x": 1240,
+    "y": 380,
     "wires": [
       [
         "f9c6054bed66e56e",
@@ -225,8 +253,60 @@
     "targetType": "full",
     "statusVal": "",
     "statusType": "auto",
-    "x": 1270,
-    "y": 420,
+    "x": 1450,
+    "y": 440,
+    "wires": []
+  },
+  {
+    "id": "5d10419c2babf6bc",
+    "type": "http in",
+    "z": "f68df1c4d2e4e1a9",
+    "name": "GET /als/library",
+    "url": "/als/library",
+    "method": "get",
+    "upload": false,
+    "swaggerDoc": "",
+    "x": 200,
+    "y": 500,
+    "wires": [
+      [
+        "8c33f8cbb1c2669c"
+      ]
+    ]
+  },
+  {
+    "id": "8c33f8cbb1c2669c",
+    "type": "function",
+    "z": "f68df1c4d2e4e1a9",
+    "name": "Listar biblioteca ALS",
+    "func": "const DB_PATH = '/data/als-library.json';\ntry {\n    const raw = fs.readFileSync(DB_PATH, 'utf8');\n    const data = raw ? JSON.parse(raw) : [];\n    msg.payload = data;\n    msg.statusCode = 200;\n} catch (err) {\n    if (err.code === 'ENOENT') {\n        msg.payload = [];\n        msg.statusCode = 200;\n    } else {\n        node.error('No se pudo leer la biblioteca ALS', err);\n        msg.statusCode = 500;\n        msg.payload = { error: 'No se pudo leer la biblioteca ALS' };\n    }\n}\nreturn msg;",
+    "outputs": 1,
+    "noerr": 0,
+    "initialize": "",
+    "finalize": "",
+    "libs": [
+      {
+        "var": "fs",
+        "module": "fs"
+      }
+    ],
+    "x": 480,
+    "y": 500,
+    "wires": [
+      [
+        "0f16a9fca5dce956"
+      ]
+    ]
+  },
+  {
+    "id": "0f16a9fca5dce956",
+    "type": "http response",
+    "z": "f68df1c4d2e4e1a9",
+    "name": "",
+    "statusCode": "",
+    "headers": {},
+    "x": 700,
+    "y": 500,
     "wires": []
   }
 ]
\ No newline at end of file