3e7e93ec-7a7c-4e6c-85be-68b1e1c2a9d2

prisma/schema.prisma

@@ -8,7 +8,7 @@ datasource db {
 }
 
 // A preset script file living somewhere in the folder tree.
-// folderPath is the full path from the virtual root, e.g. "root/embedded/Synth-C".
+// folderPath is the full path from the virtual root, e.g. "root/embedded".
 // Names are unique per folder (files in a directory).
 // approx = true marks embedded presets that are generated stand-ins rather
 // than ports of the original's code (the original relies on effects the
@@ -45,7 +45,7 @@ model Settings {
   bandConfig    String?
   beatConfig    String?
   // Version stamp of the embedded preset library; when it changes, the
-  // root/embedded subtree is re-seeded from BUILTIN + EMBEDDED_LIBRARY.
+  // root/embedded subtree is re-seeded from EMBEDDED_LIBRARY.
   embeddedSeed  String?
   updatedAt     DateTime @updatedAt
 }

src/app/api/presets/route.ts

@@ -1,23 +1,17 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { db } from '@/lib/db'
-import { BUILTIN_PRESETS } from '@/lib/ava/presets'
 import { EMBEDDED_LIBRARY, EMBEDDED_SEED_VERSION } from '@/lib/ava/embedded-presets'
 import { ensureFolderRows } from '@/lib/server/preset-tree'
 import { EMBEDDED_ROOT, ROOT, USER_ROOT } from '@/lib/preset-paths'
 
 export const dynamic = 'force-dynamic'
 
-/** The structural backbone of the tree, created on first run. */
+/**
-const BASE_FOLDERS = [
+ * The structural backbone of the tree, created on first run. The embedded
-  ROOT,
+ * branch has no subfolders (v7.19.0 curation) — "Beat Matrix" lives directly
-  EMBEDDED_ROOT,
+ * under root/embedded.
-  USER_ROOT,
+ */
-  'root/embedded/Synth-C',
+const BASE_FOLDERS = [ROOT, EMBEDDED_ROOT, USER_ROOT]
-  'root/embedded/Amp Picks',
-  'root/embedded/Dynamics',
-  'root/embedded/Envision',
-  'root/embedded/Zai-Magic',
-]
 
 /**
  * Version-gated seed + INTEGRITY SELF-HEAL for the embedded library.
@@ -26,18 +20,13 @@ const BASE_FOLDERS = [
  * sees, so GET verifies it on every request:
  *   1. version gate — EMBEDDED_SEED_VERSION changes trigger a full re-seed
  *      (library was regenerated);
- *   2. fingerprint — the embedded subtree must exactly match
+ *   2. fingerprint — the embedded subtree must exactly match EMBEDDED
- *      BUILTIN + EMBEDDED (folder + name). Any drift — a preset renamed or
+ *      (folder + name). Any drift — a preset renamed or deleted through
- *      deleted through pre-hardening endpoints, a row injected straight into
+ *      pre-hardening endpoints, a row injected straight into the DB —
- *      the DB — re-seeds the subtree automatically.
+ *      re-seeds the subtree automatically.
  */
 function libraryFingerprint(): string {
-  const items = [
+  const items = EMBEDDED_LIBRARY.map((p) => `${p.folder}/${p.name}`)
-    ...BUILTIN_PRESETS.map((p) => `root/embedded/Synth-C/${p.name}`),
-    ...EMBEDDED_LIBRARY.map(
-      (p) => `${p.folder.replace('root/embedded/root/embedded/', 'root/embedded/')}/${p.name}`,
-    ),
-  ]
   return items.sort().join('|')
 }
 
@@ -72,30 +61,20 @@ async function ensureSeeded(): Promise<void> {
         ],
       },
     })
+    // the curated library has NO subfolders — drop any stale category
+    // folder rows (Synth-C / Amp Picks / Dynamics / Envision / Zai-Magic)
+    await db.folder.deleteMany({ where: { path: { startsWith: 'root/embedded/' } } })
     await db.preset.createMany({
-      data: [
+      data: EMBEDDED_LIBRARY.map((p) => ({
-        ...BUILTIN_PRESETS.map((p) => ({
+        name: p.name,
-          name: p.name,
+        author: p.author,
-          author: p.author,
+        description: p.description,
-          description: p.description,
+        content: p.content,
-          content: p.content,
+        originalFile: p.originalFile ?? null,
-          originalFile: p.originalFile ?? null,
+        isBuiltIn: true,
-          isBuiltIn: true,
+        approx: p.approx ?? false,
-          approx: false,
+        folderPath: p.folder,
-          folderPath: 'root/embedded/Synth-C',
+      })),
-        })),
-        ...EMBEDDED_LIBRARY.map((p) => ({
-          name: p.name,
-          author: p.author,
-          description: p.description,
-          content: p.content,
-          originalFile: p.originalFile ?? null,
-          isBuiltIn: true,
-          approx: p.approx ?? false,
-          // tolerate old converter output that recorded the download nesting
-          folderPath: p.folder.replace('root/embedded/root/embedded/', 'root/embedded/'),
-        })),
-      ],
     })
     await db.settings.upsert({
       where: { id: 'main' },
@@ -114,6 +93,12 @@ async function ensureSeeded(): Promise<void> {
  * the embedded library, folders outside the structural backbone — is purged
  * here so no visitor can ever alter what other visitors see. Runs on every
  * GET; it's two indexed deleteMany calls on a small SQLite table.
+ *
+ * v7.19.0: the embedded branch ships NO subfolders, so the folder purge now
+ * keeps only the three backbone rows and deletes everything else (stale
+ * category folders included). User folders never exist server-side — the
+ * "root/user created" tree lives in each visitor's browser — so nothing of
+ * any visitor's is touched.
  */
 async function purgeVisitorJunk(): Promise<void> {
   await db.preset.deleteMany({
@@ -126,14 +111,7 @@ async function purgeVisitorJunk(): Promise<void> {
     },
   })
   await db.folder.deleteMany({
-    where: {
+    where: { path: { notIn: [ROOT, EMBEDDED_ROOT, USER_ROOT] } },
-      NOT: [
-        { path: ROOT },
-        { path: EMBEDDED_ROOT },
-        { path: USER_ROOT },
-        { path: { startsWith: 'root/embedded/' } },
-      ],
-    },
   })
 }
 

src/app/page.tsx

@@ -102,19 +102,17 @@ function useInitialLoad() {
       const beat = readStoredBeatConfig()
       if (beat) store.applyBeatConfig(beat)
 
-      // startup script: saved default (this browser) → v7.2 default preset
+      // startup script: saved default (this browser) → the embedded default
-      // (Zai-Magic "Bass Bloom" — the megabuf particle bloom that remembers
+      // preset (v7.19.0: "Beat Matrix" — the 16-band beat-reactive spectrum
-      // every beat's hue) → any Zai-Magic preset → template
+      // wall, the single preset of the curated embedded library) → template
       let text: string | null = lsGetString('ava.defaultScript')
       const usedSavedDefault = text !== null && text.trim() !== ''
       let startupPreset: (typeof presetsList)[number] | undefined
       if (!text) {
         startupPreset =
           presetsList.find(
-            (p) => p.folderPath === 'root/embedded/Zai-Magic' && p.name === 'Bass Bloom',
+            (p) => p.folderPath === 'root/embedded' && p.name === 'Beat Matrix',
-          ) ??
+          ) ?? presetsList[0]
-          presetsList.find((p) => p.folderPath === 'root/embedded/Zai-Magic') ??
-          presetsList[0]
         text = startupPreset?.content ?? null
       }
       if (!text) text = STARTER_TEMPLATE

src/components/ava/audio-source.ts

@@ -320,17 +320,18 @@ function fileErrorMessage(err: unknown): string {
 }
 
 // ---------------------------------------------------------------------------
-// v7.2 showcase defaults — Bass Bloom + the Zai-Magic club mix
+// Showcase defaults (v7.19.0) — "Beat Matrix" over the demo track
 // ---------------------------------------------------------------------------
 
-/** The read-only folder that ships the hand-authored Zai-Magic presets. */
+/** The read-only folder of the curated embedded library (one preset:
-const ZAI_MAGIC_FOLDER = 'root/embedded/Zai-Magic'
+ *  "Beat Matrix" — the single shipped preset, directly under root/embedded). */
+const EMBEDDED_FOLDER = 'root/embedded'
 
 // ---------------------------------------------------------------------------
 // v7.11 — the visitor's own selection vs. the welcome showcase
 // ---------------------------------------------------------------------------
 
-/** The script text this visit booted with (saved default / Bass Bloom /
+/** The script text this visit booted with (saved default / Beat Matrix /
  *  template). Any later difference = the visitor's own material. */
 let bootScriptSnapshot = ''
 
@@ -366,18 +367,18 @@ export function visitorHasOwnSelection(): boolean {
 /**
  * Music just started but no preset is active (the visitor never picked one —
  * e.g. they are running their own untitled draft): load the default preset,
- * Zai-Magic "Bass Bloom", so something beat-reactive is on screen the moment
+ * the embedded "Beat Matrix", so something beat-reactive is on screen the
- * audio arrives. Engine-only — the editor's unsaved text is never touched
+ * moment audio arrives. Engine-only — the editor's unsaved text is never
- * (the same courtesy random switching pays). v7.11: a visitor with their OWN
+ * touched (the same courtesy random switching pays). v7.11: a visitor with
- * material (custom draft / saved default) is left completely alone — the
+ * their OWN material (custom draft / saved default) is left completely
- * forced default used to replace their running script.
+ * alone — the forced default used to replace their running script.
  */
 function ensureDefaultPreset(): void {
   const s = useAvaStore.getState()
   if (s.activePresetId !== null) return
   if (visitorHasOwnSelection()) return
   const preset = s.presets.find(
-    (p) => p.folderPath === ZAI_MAGIC_FOLDER && p.name === 'Bass Bloom',
+    (p) => p.folderPath === EMBEDDED_FOLDER && p.name === 'Beat Matrix',
   )
   if (!preset) return
   const v = validateScript(preset.content)
@@ -390,30 +391,31 @@ function ensureDefaultPreset(): void {
 }
 
 /**
- * The Demo button is the showcase: point the preset tree at Zai-Magic (and
+ * The Demo button is the showcase: point the preset tree at the embedded
- * expand it so the visitor sees what is playing), then start the sequence —
+ * library (and expand it so the visitor sees what is playing). v7.19.0: the
- * v7.4: every Zai-Magic preset IN ORDER, one every 20 seconds, wrapping
+ * curated library is a single preset ("Beat Matrix"), so there is nothing
- * around, for the one play-through (Sequence, not Random — the demo pass
+ * to cycle — no mix timer is engaged; the track simply plays under the
- * should walk the whole family, not repeat picks). v7.11: only ever called
+ * beat-reactive wall, and any mix the visitor starts later is scoped to
- * for a visit that made no choice of their own (see visitorHasOwnSelection).
+ * the folder by the selection. v7.11: only ever called for a visit that
+ * made no choice of their own (see visitorHasOwnSelection).
  */
 function startShowcaseMix(): void {
   const s = useAvaStore.getState()
-  if (s.folders.includes(ZAI_MAGIC_FOLDER)) {
+  if (s.folders.includes(EMBEDDED_FOLDER)) {
-    s.selectFolder(ZAI_MAGIC_FOLDER) // also scopes the mix to the folder
+    s.selectFolder(EMBEDDED_FOLDER) // also scopes any later mix to the folder
-    s.toggleFolder(ZAI_MAGIC_FOLDER, true)
+    s.toggleFolder(EMBEDDED_FOLDER, true)
   }
-  s.setRandomIntervalSec(20)
-  s.setSequenceMode(true) // mutual exclusion unticks Random if it was on
 }
 
 /**
  * v7.3/v7.4: the demo is a single pass — when it ends (natural play-through,
  * Stop button, or switching to another source) unwind the showcase state:
- * the Demo flow force-checked the mix mode (Sequence), so it gets unchecked
+ * the Demo flow used to force-check the mix mode (Sequence), so it gets
- * again. The visitor's own selection (the last preset that was running)
+ * unchecked again. v7.19.0 no longer engages a timer, but the unwind stays
- * stays put. v7.11: only called when the showcase actually engaged — a
+ * as a safety net for any flags that did get set. The visitor's own
- * visitor whose own Random/Sequence mix was already running keeps it.
+ * selection (the last preset that was running) stays put. v7.11: only
+ * called when the showcase actually engaged — a visitor whose own
+ * Random/Sequence mix was already running keeps it.
  */
 function retireDemoShowcase(): void {
   const s = useAvaStore.getState()
@@ -473,7 +475,7 @@ export function useAudioSource() {
     const index = readDemoNext()
     try {
       await engine.audio.startDemo(index)
-      // v7.11: the welcome showcase (Bass Bloom + Zai-Magic Sequence) only
+      // v7.11: the welcome showcase (Beat Matrix over the demo track) only
       // engages for a visit that made NO choice of their own — no preset
       // loaded (double-click / Load / a copy), no custom script material in
       // the editor, no own mix running. Everyone else keeps their selection:
@@ -492,17 +494,17 @@ export function useAudioSource() {
         if (reason === 'ended' || reason === 'stop') writeDemoNext(index + 1)
       }
       syncSource()
-      // showcase flow (v7.2/v7.4/v7.11): nothing active and nothing of the
+      // showcase flow (v7.2/v7.11, reworked v7.19.0): nothing active and
-      // visitor's own → Bass Bloom, then the Zai-Magic sequence takes over —
+      // nothing of the visitor's own → Beat Matrix on screen; the tree points
-      // every preset in order, 20 s each, for this one play-through. With
+      // at the embedded library for the rest of the pass. With the visitor's
-      // the visitor's own selection, BOTH are skipped (ensureDefaultPreset
+      // own selection, the showcase is skipped (ensureDefaultPreset holds its
-      // holds its own guard as well).
+      // own guard as well).
       ensureDefaultPreset()
       if (showcase) startShowcaseMix()
       toast({
         title: 'Demo track playing',
         description: showcase
-          ? `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · Zai-Magic preset sequence -- every preset in order, 20 s each, one play-through.`
+          ? `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · "Beat Matrix" is running -- the built-in beat-reactive wall, straight from the embedded library.`
           : `${demoTrackTitle(index)} (${index + 1} of ${DEMO_TRACK_COUNT}) · your selection stays active -- the demo never touches your preset or the editor.`,
       })
     } catch (err) {

src/components/ava/visual-stage.tsx

@@ -110,8 +110,8 @@ export function VisualStage({ className }: { className?: string }) {
               </h2>
               <div className="grid gap-1.5 sm:gap-2.5">
                 {/* v7.2 showcase entry point -- the shimmering Demo Track
-                    button: one click starts the music AND the Zai-Magic
+                    button: one click starts the music AND the embedded
-                    club mix (random preset every 20 s) */}
+                    "Beat Matrix" showcase (v7.19.0: single-preset library) */}
                 <Button
                   onClick={() => void startDemo()}
                   className="shimmer-cta h-11 gap-2 bg-emerald-400 text-emerald-950 hover:bg-emerald-300 sm:h-12"

src/lib/ava/presets.ts

@@ -1,18 +1,10 @@
-// AVA — built-in preset scripts
+// AVA — starter template for new visualization scripts.
 //
-// These five presets are adaptations of the real Winamp AVS presets the user
+// v7.19.0: the five Synth-C "built-in" presets (BUILTIN_PRESETS, formerly
-// supplied (Google Drive → visbot.net scene classics). The core math of each
+// seeded under root/embedded/Synth-C) were removed when the embedded branch
-// original Superscope / Texer II concept is preserved and translated to the
+// was curated down to just "Beat Matrix" (see lib/ava/embedded-presets.ts).
-// AVA expression dialect. The original binary .avs files ship alongside the
+// This module now carries only the starter template used by the editor and
-// app in /avs-originals/ for reference and download.
+// the new-preset flows.
-
-export interface BuiltinPreset {
-  name: string
-  author: string
-  description: string
-  originalFile?: string
-  content: string
-}
 
 export const STARTER_TEMPLATE = `# AVA visualization script -- starter template
 # Tap "Help" in the editor for the full variable & function reference.
@@ -45,227 +37,3 @@ red = 0.2 + bass
 green = 0.8
 blue = 0.25 + treb
 `
-
-export const BUILTIN_PRESETS: BuiltinPreset[] = [
-  {
-    name: 'Gap The Mind',
-    author: 'synth-c (adapted)',
-    description:
-      'Radial waveform circles with the original polar-warp distortion. The radius tracks a rolling average of the audio, treble warps the ring geometry, and the hue sweeps on every beat. Adapted from the Winamp AVS classic (Visbot 17).',
-    originalFile: '/avs-originals/Synth-C - Gap The Mind.avs',
-    content: `# Adapted from "Synth-C - Gap The Mind" (Winamp AVS / visbot.net)
-# Core of the original Superscope preserved:
-#   r = i*2pi; d = snd; x = sin(r)*d; y = cos(r)*d
-#   d = d*(1 - sin((r-pi/2)*7)*.03); r = r + cos(d*12)*.03
-name: Gap The Mind
-author: synth-c (adapted)
-mode: lines
-blend: additive
-persist: 0.9
-linewidth: 2
-
-[init]
-n = 480
-hue = 0
-rot = 0
-avg = 0
-
-[frame]
-# rolling average of the audio energy (the original used a getosc ring buffer)
-avg = avg * 0.8 + (bass + vol) * 0.2
-hue = hue + dt * (0.05 + mid * 0.12) + beat * 0.015
-rot = rot + dt * (0.1 + mid_att * 0.9)
-rad = 0.25 + avg * 0.85
-warp = 1 + treb * 0.5
-
-[point]
-r = i * 6.28318
-d = rad + abs(v) * 0.45
-d = d * (1 - sin((r - 1.5708) * 7) * 0.03 * warp)
-r = r + cos(d * 12) * 0.03 * warp + rot
-x = sin(r) * d / aspect
-y = cos(r) * d
-red = 0.5 + 0.5 * sin(hue * 6.28318)
-green = 0.5 + 0.5 * sin(hue * 6.28318 + 2.094)
-blue = 0.5 + 0.5 * sin(hue * 6.28318 + 4.188)
-`,
-  },
-  {
-    name: "wonder 'bout",
-    author: 'zamuz (adapted)',
-    description:
-      'A field of rings that spawn, expand and fade -- each at its own tempo, sized by the bass, in stable per-ring colors (the original spawned Texer II ring sprites with random colors and bass-scaled sizes). From the visbot.net classic by zamuz.',
-    originalFile: '/avs-originals/zamuz - wonder bout.avs',
-    content: `# Adapted from "wonder 'bout" by zamuz (Winamp AVS / visbot.net)
-# The original spawned Texer II ring sprites: ss = ss + .05 per frame,
-# size = |ss| * min(w,h)*.006, random color & position on wrap,
-# grow-scale sampled from the bass (getspec(.1,.1,0)).
-name: wonder 'bout
-author: zamuz (adapted)
-mode: lines
-blend: additive
-persist: 0.88
-linewidth: 1.8
-
-[init]
-n = 480
-groups = 12
-hue = 0
-
-[frame]
-# expansion speed rises with the smoothed bass (original: reg01 = .05/frame)
-speed = 0.25 + bass_att * 0.9
-hue = hue + dt * 0.1
-
-[point]
-g = floor(i * groups)
-gi = frac(i * groups)
-# per-ring phase, drifting at its own tempo
-ph = frac(rand(g * 7.3 + 1) + time * speed * (0.7 + rand(g + 31) * 0.6))
-px0 = rand(g + 3.7) * 1.7 - 0.85
-py0 = rand(g + 9.1) * 1.7 - 0.85
-rad = ph * (0.3 + bass * 0.6)
-cr = rand(g + 21.7)
-cg = rand(g + 15.3)
-cb = rand(g + 27.9)
-fade = (1 - ph) * (0.25 + ph * 2.2)
-a = 6.28318 * (gi * 1.05 - 0.025)
-x = px0 + cos(a) * rad / aspect
-y = py0 + sin(a) * rad
-red = cr * fade * (0.7 + 0.3 * sin(hue * 6.28318 + g))
-green = cg * fade * (0.7 + 0.3 * sin(hue * 6.28318 + g + 2.09))
-blue = cb * fade * (0.7 + 0.3 * sin(hue * 6.28318 + g + 4.19))
-skip = if(below(gi, 0.025), 1, 0)
-`,
-  },
-  {
-    name: 'Quantization',
-    author: 'synth-c (adapted)',
-    description:
-      'Audio-reactive rings snapped to a pixel grid -- the original quantized scope coordinates ((x*40)|0)/40 and rendered a sound heightmap as dot fog. Here the rings are quantized dots that thicken with the mid range.',
-    originalFile: '/avs-originals/Synth-C - Quantization.avs',
-    content: `# Adapted from "Synth-C - Quantization" (Winamp AVS / visbot.net)
-# Original Superscope: r = i*2pi; d = snd + .5; x = sin(r)*d; y = cos(r)*d
-# with pixel quantization  x = ((x*40)|0)/40  and a dot-fog sound heightmap.
-name: Quantization
-author: synth-c (adapted)
-mode: dots
-blend: additive
-persist: 0.82
-linewidth: 3
-
-[init]
-n = 720
-hue = 0
-q = 34
-avg = 0
-
-[frame]
-hue = hue + dt * 0.06
-avg = avg * 0.8 + vol * 0.2
-rad = 0.28 + avg * 0.75
-zoom = 0.9 + bass * 0.3
-
-[point]
-r = i * 6.28318
-d = rad + abs(v) * 0.4
-x0 = sin(r) * d * zoom
-y0 = cos(r) * d * zoom
-# snap to the quantization grid (the |0 division from the original)
-x = floor(x0 * q) / q / aspect
-y = floor(y0 * q) / q
-red = 0.5 + 0.5 * sin(hue * 6.28318 + d * 3)
-green = 0.5 + 0.5 * sin(hue * 6.28318 + d * 3 + 2.09)
-blue = 0.5 + 0.5 * sin(hue * 6.28318 + d * 3 + 4.19)
-size = 2 + mid * 5
-`,
-  },
-  {
-    name: "keep tryin'",
-    author: 'zamuz (adapted)',
-    description:
-      "Bass-driven particle bursts that expand outward with a sinusoidal swirl -- the original spawned white Texer dots with radius = bass*3+.3 and pushed the screen through sin(y*20) swirl movements. Dot size follows the highs.",
-    originalFile: '/avs-originals/zamuz - keep tryin.avs',
-    content: `# Adapted from "keep tryin'" by zamuz (Winamp AVS / visbot.net)
-# Original Texer II dots: rs = getspec(.1,.1,0)*3 + .3 on spawn,
-# swirl movement  x = x + .002*sin(y*20); y = y + .002*sin(x*20).
-name: keep tryin'
-author: zamuz (adapted)
-mode: dots
-blend: additive
-persist: 0.85
-linewidth: 3
-
-[init]
-n = 900
-travel = 0
-hue = 0
-
-[frame]
-travel = travel + dt * (0.35 + bass_att * 1.2)
-swirl = 0.15 + mid * 0.5
-hue = hue + dt * 0.15
-
-[point]
-d = frac(rand(i + 0.13) + travel)
-ang = rand(i + 0.77) * 6.28318 + d * swirl * 6.28318
-rad = d * (0.3 + bass * 0.7)
-x0 = sin(ang) * rad
-y0 = cos(ang) * rad
-# the swirl distortion from the original movement
-x = x0 + 0.05 * sin(y0 * 20) / aspect
-y = y0 + 0.05 * sin(x0 * 20)
-fade = sin(d * 3.14159)
-red = fade * (0.25 + 0.75 * sin(hue * 6.28318))
-green = fade * (0.25 + 0.75 * sin(hue * 6.28318 + 2.09))
-blue = fade * (0.25 + 0.75 * sin(hue * 6.28318 + 4.19))
-size = 1.5 + treb * 3
-`,
-  },
-  {
-    name: 'vorticity',
-    author: 'synth-c / zamuz (adapted)',
-    description:
-      'Swirling spiral arms rotating in a vortex -- the original advected 3D particle trails through a rotating vector field at sound-driven speed. Here six arms twist harder as the mid range rises and the whole vortex spins with the bass.',
-    originalFile: '/avs-originals/zamuz - vorticity brain activity remix.avs',
-    content: `# Adapted from "vorticity (brain activity remix)" -- original by synth-c,
-# remix by zamuz (Winamp AVS / visbot.net). The original ran 3D particle
-# trails through rotating vector fields at sound-driven speed (sndspd = 10).
-name: vorticity
-author: synth-c / zamuz (adapted)
-mode: lines
-blend: additive
-persist: 0.92
-linewidth: 1.6
-
-[init]
-n = 1200
-t = 0
-hue = 0
-
-[frame]
-t = t + dt * (0.4 + bass_att * 1.6)
-twist = 1.2 + mid * 2.6
-zoom = 0.75 + bass * 0.45
-hue = hue + dt * 0.04 + beat * 0.01
-
-[point]
-arm = floor(i * 6)
-fa = frac(i * 6)
-d = fa
-ang = arm * 1.047 + d * twist * 3.14159 + t
-rad = (0.06 + d * d * 1.1) * zoom
-x = sin(ang) * rad / aspect
-y = cos(ang) * rad
-red = (0.3 + 0.7 * d) * (0.35 + bass)
-green = (0.3 + 0.7 * d) * (0.25 + mid)
-blue = (0.3 + 0.7 * d) * (0.2 + treb + hue * 0.25)
-skip = if(below(fa, 0.03), 1, 0)
-`,
-  },
-]
-
-/** Download path for each original Winamp .avs file. */
-export function originalFileUrl(name: string): string | undefined {
-  return BUILTIN_PRESETS.find((p) => p.name === name)?.originalFile
-}

src/lib/store.ts

@@ -29,7 +29,7 @@ export interface PresetItem {
   /** true = generated stand-in (embedded presets whose original relies on
    *  effects the script engine cannot run); false = original/user code. */
   approx?: boolean
-  /** Full path from the virtual root, e.g. "root/embedded/Synth-C". */
+  /** Full path from the virtual root, e.g. "root/embedded". */
   folderPath: string
   /** Path of the original Winamp .avs binary in /public, when shipped. */
   originalFile: string | null

worklog.md

@@ -2714,3 +2714,38 @@ BROWSER E2E (agent-browser, ALL PASS):
 
 Stage Summary:
 - v7.19.0 shipped: the trueblack tail is automatic. Every trail now ends in pure black at any persist without opting in, via an exact -1/255 GPU sweep that preserves alpha (behind/clear safe); the Canvas2D difference tail is demoted to a gated no-WebGL fallback; the header is a tri-state (auto/on/off). Texe-rings works unmodified -- the smear is gone and the background returns to pure black behind the rings.
+
+---
+Task ID: 53
+Agent: main (Z.ai Code)
+Task: v7.19.0 embedded-library curation (user request): clean out the "Embedded" branch -- remove every item and subfolder except one preset, "Beat Matrix", which moves up to live directly at root/embedded/Beat Matrix. "embedded" stays read-only; the "user created" branch stays untouched.
+
+Library source changes:
+- src/lib/ava/embedded-presets.ts: rewritten from 1476 lines / 90 presets (Amp Picks 66, Dynamics 9, Envision 16, Zai-Magic 12) + 5 Synth-C built-ins to a single hand-authored preset: Beat Matrix, folder "root/embedded" (was root/embedded/Zai-Magic). Script content byte-identical to the v7.13.1-fixed original (cell-center grid mapping, getspec bands, beat-rotated rainbow, strobe flash). EMBEDDED_SEED_VERSION 7.18.1 -> 7.19.0; header documents the curation + where the retired sources still live (tools/converted/, public/avs-originals/).
+- src/lib/ava/presets.ts: stripped to STARTER_TEMPLATE only. BUILTIN_PRESETS (the five Synth-C ports formerly seeded to root/embedded/Synth-C), the BuiltinPreset interface and the dead originalFileUrl() helper removed; no importer remains (script-tab / page / audio-source / presets-tab only ever wanted STARTER_TEMPLATE).
+
+Seed pipeline changes (src/app/api/presets/route.ts):
+- BASE_FOLDERS: the five category rows dropped; just root / root/embedded / root/user created.
+- libraryFingerprint()/seed data: BUILTIN branch gone; the old doubled-path replace() (converter "root/embedded/root/embedded/" nesting tolerance) removed -- the curated library carries clean folders.
+- Re-seed now also deletes stale embedded subfolder rows (deleteMany startsWith "root/embedded/"), so Synth-C / Amp Picks / Dynamics / Envision / Zai-Magic Folder rows do not linger as empty tree nodes.
+- purgeVisitorJunk folder purge inverted: it used to KEEP everything under root/embedded/; it now keeps ONLY the three backbone rows (notIn), enforcing the no-subfolders embedded branch on every GET. User folders never exist server-side (browser localStorage), so nothing of any visitor's is touched.
+
+Startup / showcase rewiring (the old hardwires pointed at the removed folder):
+- page.tsx: startup preset = Beat Matrix at root/embedded (was Bass Bloom in Zai-Magic, then any Zai-Magic, then [0]).
+- audio-source.ts: ZAI_MAGIC_FOLDER -> EMBEDDED_FOLDER ("root/embedded"); ensureDefaultPreset loads Beat Matrix; startShowcaseMix no longer engages a 20 s Sequence timer (nothing to cycle with a single preset) -- it just selects + expands the embedded folder, which scopes any later mix; retireDemoShowcase kept as a safety no-op; demo toast rewritten ("your selection stays active" / "\"Beat Matrix\" is running -- the built-in beat-reactive wall, straight from the embedded library.").
+- visual-stage.tsx demo-button comment + store.ts folderPath doc example + prisma/schema.prisma Preset/Settings comments updated off the retired structure (comment-only; no db push needed).
+
+Data:
+- First GET after the edit self-healed via drift detection: "[presets] embedded library drift detected -- re-seeding from source". Direct Prisma inspection after: PRESETS = ["root/embedded/Beat Matrix (builtIn=true)"], FOLDERS = ["root","root/embedded","root/user created"], embeddedSeed = 7.19.0.
+- db/custom.db.seed re-synced from the live db/custom.db (project convention: the seed file is the sandbox-reprovision baseline).
+
+BROWSER E2E (agent-browser, ALL PASS):
+- Tree: root (read-only) > embedded (read-only, "1 preset . 0 subfolders", READ-ONLY lock) > Beat Matrix; user created sibling intact; header "1 presets . 3 folders". No empty ex-category nodes.
+- Double-click Beat Matrix: runs (footer SCRIPT: Beat Matrix, PTS 160 = the 16x10 grid).
+- Fresh-visitor demo showcase (localStorage cleared): Demo Track -> SRC DEMO, BPM locked 131.4, Beat Matrix auto-loaded, toast shows the new showcase text, tree scoped "Random from: embedded" with embedded selected + expanded; no Sequence timer engaged.
+- Returning-visitor branch: after a manual load, Demo toast shows "your selection stays active" (v7.11 guard intact).
+- User-created branch: "Copy to my presets" on the embedded Beat Matrix -> lands under root/user created (tree "user created 1"), persisted in ove.userPresets.v1 localStorage; embedded branch untouched.
+- No page errors / console warnings; bun run lint clean; mobile 390x844 footer pushed naturally with content (no overlap).
+
+Stage Summary:
+- The Embedded branch is now exactly root/embedded/Beat Matrix: one hand-authored preset, zero subfolders, still read-only (server refuses all mutations; per-GET purge enforces the shape). The 95 retired presets and their folders are gone from the tree and the seed baseline; the "user created" branch is unchanged and verified working end-to-end.