    30→    30→    30→  configs, movement expressions. These are scene classics from visbot.net.
    31→    31→    31→- Decided engine design: AVS-eel-flavored expression language (if/above/below/equal/rand,
    32→    32→    32→  getspec/getosc-equivalents sv/v, reg-free flat variables) so the presets port naturally.
    33→    33→    33→
    34→    34→    34→Stage Summary:
    35→    35→    35→- All 5 original presets secured and understood; will be adapted to the AVA script dialect
    36→    36→    36→  (originals preserved as downloadable files in public/avs-originals/).
    37→    37→    37→- Core engine architecture defined: expression compiler, script parser, BeatTracker (PLL-style
    38→    38→    38→  predictor + tap tempo), AudioEngine (WebAudio FFT, mic/file/demo synth), canvas renderer.
    39→    39→    39→
    40→    40→    40→---
    41→    41→    41→Task ID: 2
    42→    42→    42→Agent: main (Z.ai Code)
    43→    43→    43→Task: Project setup — deps, Prisma schema, DB, original preset files
    44→    44→    44→
    45→    45→    45→Work Log:
    46→    46→    46→- Installed jszip (for the Rust scaffold zip download API)
    47→    47→    47→- Prisma schema rewritten: `Preset` (name/author/description/content/isBuiltIn, unique name)
    48→    48→    48→  and `Settings` (defaultScript + bandConfig + beatConfig JSON) — ran `bun run db:push` OK
    49→    49→    49→- Copied the 5 original Winamp .avs binaries to public/avs-originals/ (downloadable from UI)
    50→    50→    50→
    51→    51→    51→Stage Summary:
    52→    52→    52→- DB ready; jszip available; originals served at /avs-originals/*.avs
    53→    53→    53→
    54→    54→    54→---
    55→    55→    55→Task ID: 3
    56→    56→    56→Agent: main (Z.ai Code)
    57→    57→    57→Task: AVA core engine libraries (src/lib/ava/*)
    58→    58→    58→
    59→    59→    59→Work Log:
    60→    60→    60→- types.ts — BandConfig / BeatConfig / BandLevels / BeatFrame + defaults
    61→    61→    61→  (bass 20–100 Hz, mid 700–2000 Hz, high 7000–16000 Hz as requested)
    62→    62→    62→- expression.ts — full expression compiler: tokenizer → recursive-descent parser → closure
    63→    63→    63→  tree. AVS-eel flavored: if() is LAZY, && / || short-circuit, ternary, ^ power (right-assoc),
    64→    64→    64→  assignment valid inside call args + ternary branches (if(cond, x=1, x=2) works),
    65→    65→    65→  newline & ';' statement separators (newlines inside parens ignored), '#'/'//' comments,
    66→    66→    66→  deterministic hash rand(seed). 30+ functions incl. above/below/equal/band/bor/bnot/frac.
    67→    67→    67→- script.ts — text format parser: header keys (name/author/description/mode/blend/persist/
    68→    68→    68→  linewidth) + [init]/[frame]/[beat]/[point] sections, error objects with section+line,
    69→    69→    69→  validateScript() never throws.
    70→    70→    70→- beat.ts — BeatTracker: rolling-average energy detection w/ threshold+minInterval+floor,
    71→    71→    71→  interval learning (median + EMA period lock, spread gating), PLL-style phase predictor that
    72→    72→    72→  keeps firing beats when bass drops (confidence-gated, slowly decays), tap() tempo learning.
    73→    73→    73→- audio.ts — AudioEngine: WebAudio AnalyserNode FFT 8192 (~5.4 Hz bins), byte-spectrum band
    74→    74→    74→  averaging with attack 35ms / release 220ms smoothing; sources: demo (synthesized techno:
    75→    75→    75→  kick 160→43Hz sweep, snare bandpass 1.8k, hats HP 8.2k, saw bassline — audible + analyzable),
    76→    76→    76→  mic (never routed to speakers), file (loops, audible). getWave/getSpectrum for scripts.
    77→    77→    77→- presets.ts — 5 built-in presets ADAPTED from the user's real AVS files:
    78→    78→    78→  Gap The Mind (radial warp rings), wonder 'bout (bass-spawned expanding rings),
    79→    79→    79→  Quantization (grid-snapped dot rings), keep tryin' (bass burst dots + swirl),
    80→    80→    80→  vorticity (twisting spiral arms) + STARTER_TEMPLATE.
    81→    81→    81→- engine.ts — AvaEngine: rAF loop (bands → beat → env → frame/beat progs → point prog ×N →
    82→    82→    82→  draw), canvas 2d renderer with additive blending, per-point color, 2-pass glow,
    83→    83→    83→  persistence trails, lines/dots/solid modes, DPR-aware resize via ResizeObserver,
    84→    84→    84→  throttled stats callback for the UI. Singleton via getEngine().
    85→    85→    85→- SMOKE TESTED via bun script: all 5 presets parse & execute 120 frames; lazy-if/ternary/pow
    86→    86→    86→  OK; beat sim locks 124.1 BPM from 124 BPM kick train; predictor sustains beats through 10s
    87→    87→    87→  of silence; tap tempo locks 120 BPM from 500ms taps. (2 parser bugs found & fixed: assignment
    88→    88→    88→  inside call args; newline statement separators with paren-awareness.)
    89→    89→    89→
    90→    90→    90→Stage Summary:
    91→    91→    91→- Core engine complete and verified. Env variables exposed to scripts: n, t, time, dt, frame,
    92→    92→    92→  bass/mid/treb (+ _att), vol (+ _att), beat, bpm, beatphase, beatconf, beats, w, h, aspect,
    93→    93→    93→  persist, i, v, sv, x, y, red, green, blue, skip, size, alpha.
    94→    94→    94→
    95→    95→    95→---
    96→    96→    96→Task ID: 4
    97→    97→    97→Agent: main (Z.ai Code)
    98→    98→    98→Task: API routes
    99→    99→    99→
   100→   100→   100→Work Log:
   101→   101→   101→- GET/POST /api/presets — GET seeds built-ins on first run and lists all; POST upserts user
   102→   102→   102→  presets by name (built-ins protected, 409 on name clash with built-in)
   103→   103→   103→- PUT/DELETE /api/presets/[id] — user presets only
   104→   104→   104→- GET/PUT /api/settings — defaultScript + bandConfig + beatConfig (upsert, JSON strings in DB)
   105→   105→   105→- Created src/lib/ava/blueprint.ts STUB (interface Blueprint + placeholder) for Task 3-b
   106→   106→   106→
   107→   107→   107→Stage Summary:
   108→   108→   108→- Backend complete. Frontend contract: GET /api/presets → { presets: [...] };
   109→   109→   109→  POST /api/presets {name, content, author?, description?} → {preset};
   110→   110→   110→  GET /api/settings → { defaultScript, bandConfig, beatConfig };
   111→   111→   111→  PUT /api/settings { defaultScript? , bandConfig?, beatConfig? }.
   112→   112→   112→
   113→   113→   113→
   114→   114→   114→---
   115→   115→   115→Task ID: 3-a
   116→   116→   116→Agent: full-stack-developer (UI)
   117→   117→   117→Task: Complete UI for AVA — single-page app (dark club/VJ aesthetic) with header
   118→   118→   118→(audio source controls, BPM readout, green beat dot + Set Beat pairing), visual
   119→   119→   119→stage (canvas + engine loop), 5-tab control panel (Presets / Script / Detect /
   120→   120→   120→Beat / Native) and sticky footer status bar.
   121→   121→   121→
   122→   122→   122→Work Log:
   123→   123→   123→- Read worklog + all engine APIs (types/engine/script/presets/blueprint/audio/beat)
   124→   124→   124→  and the existing API routes before writing any code.
   125→   125→   125→- src/lib/store.ts — zustand store: throttled stats (AvaStats = EngineStats +
   126→   126→   126→  beatCount), beatFlash pulses, bandConfig/beatConfig mirrors that write the
   127→   127→   127→  engine live + persist (localStorage instant, PUT /api/settings debounced 600 ms
   128→   128→   128→  with shape guards), preset list + refreshPresets(), script text, active tab.
   129→   129→   129→- src/components/ava/audio-source.ts — tapBeat() (engine.beat.tap + dot flash +
   130→   130→   130→  lastTap), applyScriptText() (validate → setScript, engine.setScript), and
   131→   131→   131→  useAudioSource() hook wrapping startDemo/startMic/startFile/stop with error
   132→   132→   132→  mapping (mic permission / no device / decode failure → destructive toast) and
   133→   133→   133→  store sync from engine.audio.kind (authoritative).
   134→   134→   134→- src/components/ava/beat-dot.tsx — the green indicator: SVG phase ring
   135→   135→   135→  (stroke-dashoffset follows beat.phase, 150 ms linear transition), emerald dot
   136→   136→   136→  that scales 1.9× + glows 180 ms on audio/tap beats, and for predicted beats an
   137→   137→   137→  expanding outline ring (framer-motion, 450 ms) + "PRED" badge. Flash state is
   138→   138→   138→  derived (seq vs clearedSeq) — no setState-in-effect.
   139→   139→   139→- src/app/page.tsx — useInitialLoad (presets + settings; server → localStorage →
   140→   140→   140→  first preset → STARTER_TEMPLATE fallback chain; applies configs + script),
   141→   141→   141→  useBeatWatcher (see decisions below), useSpaceToTap (Space outside
   142→   142→   142→  inputs/textarea/select/button → tap, preventDefault). Root layout:
   143→   143→   143→  min-h-screen flex-col, lg:h-screen with internal panel scroll (footer always
   144→   144→   144→  at viewport bottom; mobile pushes footer naturally).
   145→   145→   145→- src/components/ava/header.tsx — sticky, backdrop-blur; emerald logo square +
   146→   146→   146→  AVA title + subtitle (hidden on mobile); segmented Demo/Mic/File/Stop control
   147→   147→   147→  (44 px targets, active state emerald, hidden file input); demo BPM slider
   148→   148→   148→  (60–200, only while demo active); right cluster = BPM readout (mono, emerald,
   149→   149→   149→  '—' when unknown) + BeatDot + Set Beat button, always visible, wraps to row 1
   150→   150→   150→  on mobile (source controls wrap to row 2).
   151→   151→   151→- src/components/ava/visual-stage.tsx — owns engine lifecycle (engine.start/
   152→   152→   152→  stop + onStats → store), idle glass overlay with 3 big source buttons
   153→   153→   153→  (AnimatePresence fade), top-left FPS/PTS readout (pointer-events-none), top-
   154→   154→   154→  right fullscreen toggle (requestFullscreen on container). Canvas absolute
   155→   155→   155→  fill; engine's ResizeObserver handles DPR.
   156→   156→   156→- src/components/ava/presets-tab.tsx — preset cards (name/author/description
   157→   157→   157→  line-clamp-3, mode + built-in/custom badges), Load (applies + toasts, jumps
   158→   158→   158→  to Script tab on compile error), ".avs original" download link for built-ins
   159→   159→   159→  via originalFileUrl(name), two-step Delete (3 s confirm timeout) for customs,
   160→   160→   160→  "New Script" (STARTER_TEMPLATE + switch tab), save-as-preset section (POST,
   161→   161→   161→  409 handled, refresh + toast). List: max-h-96 + thin styled scrollbar.
   162→   162→   162→- src/components/ava/script-tab.tsx — toolbar (Apply ▶ / Save as Default 💾 /
   163→   163→   163→  Save to File ⬇ Blob download <meta.name>.ava / Load from File 📂 (.ava,.avs,
   164→   164→   164→  .txt, auto-applies when valid) / New / Help ?), gutter+textarea editor
   165→   165→   165→  (synced scroll, Tab → 2 spaces, min-h-320, wrap=off), rose gutter line on the
   166→   166→   166→  error line, live debounced validation (250 ms), status line "✔ Compiled OK —
   167→   167→   167→  mode: lines, n=480" (n from running [init] on a scratch env) / compile error
   168→   168→   168→  / stats.error runtime errors.
   169→   169→   169→- src/components/ava/help-panel.tsx — Quick Start, full variables table (frame
   170→   170→   170→  + point-only), functions table, operators, 5 example formulas, .ava file
   171→   171→   171→  format doc.
   172→   172→   172→- src/components/ava/detect-tab.tsx — Bass/Mid/High cards: Low/High Hz sliders
   173→   173→   173→  (bass 10–300/20–500, mid 100–5000/300–8000, high 1000–12000/4000–20000; low <
   174→   174→   174→  high enforced with min gaps 10/50/200 in the store), Gain 0.1–4, mono Hz
   175→   175→   175→  readouts, live VU meters (instant fill emerald/amber/rose + _att peak-hold
   176→   176→   176→  tick), per-band reset.
   177→   177→   177→- src/components/ava/beat-tab.tsx — 80 px BeatDot + source badge (AUDIO/PRED/
   178→   178→   178→  TAP), big BPM readout, large SET BEAT button (framer-motion whileTap), tap
   179→   179→   179→  feedback ("Tap 3… keep tapping" → "Locked: 128.0 BPM"), confidence bar, beat
   180→   180→   180→  count, sensitivity (threshold 1.1–2.5, "lower = more sensitive"), min
   181→   181→   181→  interval 150–600 ms, prediction switch ("Keeps the beat alive when the bass
   182→   182→   182→  drops out"), how-it-works explainer.
   183→   183→   183→- src/components/ava/native-tab.tsx — renders BLUEPRINT (title/intro/sections/
   184→   184→   184→  bullets/code blocks in scrollable pre), emerald "Download Rust Scaffold
   185→   185→   185→  (.zip)" <a href="/api/rust-scaffold" download>, identical-language note.
   186→   186→   186→- src/components/ava/footer-bar.tsx — sticky mt-auto status bar: SRC/FPS/PTS/
   187→   187→   187→  BPM/SCRIPT micro-stats (mono), green "engine ok" / pulsing red "script error".
   188→   188→   188→- src/app/layout.tsx — dark class on <html>, title "AVA — Advanced
   189→   189→   189→  Visualization Agent", body bg-zinc-950.
   190→   190→   190→- FIXED BUGS during browser testing: (1) Detect tab crashed — levels key for
   191→   191→   191→  the high band is `treb` not `high` (added levelKey/attKey mapping to BandSpec);
   192→   192→   192→  (2) lint: setState-in-effect in BeatDot (derived flash state instead);
   193→   193→   193→  (3) lint: // text node in help panel.
   194→   194→   194→- Tuned src/hooks/use-toast.ts: TOAST_LIMIT 1→3, TOAST_REMOVE_DELAY 100 s→5 s
   195→   195→   195→  (lingering toasts were covering header/panel buttons during testing).
   196→   196→   196→- VERIFIED in headless browser: initial load seeds presets + applies Gap The
   197→   197→   197→  Mind (480 pts @60 fps); demo start/stop + DEMO slider; beat dot flashing live
   198→   198→   198→  (scale 1↔1.9); tap tempo lock ("Locked: 119.9 BPM" from 4×500 ms taps, Space
   199→   199→   199→  key too); after Stop the PRED badge/outline ring shows prediction carrying
   200→   200→   200→  the beat; preset load/save/delete (two-step) round-trip via API; Save as
   201→   201→   201→  Default → PUT /api/settings + localStorage; band slider → debounced PUT;
   202→   202→   202→  .avs originals serve 200; script upload (auto-apply, n=300) + export to
   203→   203→   203→  Upload Test.ava; mic error toast ("No microphone found" in this headless
   204→   204→   204→  env); no blue/indigo anywhere; lint clean; tsc clean for owned files.
   205→   205→   205→
   206→   206→   206→Stage Summary:
   207→   207→   207→- Files created: src/lib/store.ts; src/components/ava/{shared.ts, audio-source.ts,
   208→   208→   208→  beat-dot.tsx, header.tsx, visual-stage.tsx, presets-tab.tsx, script-tab.tsx,
   209→   209→   209→  help-panel.tsx, detect-tab.tsx, beat-tab.tsx, native-tab.tsx, footer-bar.tsx,
   210→   210→   210→  control-panel.tsx}. Modified: src/app/page.tsx (replaced), src/app/layout.tsx,
   211→   211→   211→  src/hooks/use-toast.ts (toast duration/limit only).
   212→   212→   212→- KEY DECISION — beat flash sampling: engine stats are throttled (~8 Hz) but
   213→   213→   213→  beat=true lasts one frame, so most beats are invisible in stats. The watcher
   214→   214→   214→  in page.tsx ALSO fires on beat.phase running backwards (real beats reset
   215→   215→   215→  phase to 0; the predictor grid wraps at 1). Classification: stats.beat.beat
   216→   216→   216→  sampled → exact source; phase drop + prediction on + confidence > 0.35 +
   217→   217→   217→  bassAtt < 0.06 → 'predicted'; phase drop + bassAtt > 0.05 → 'audio'; silent
   218→   218→   218→  no-lock → no flash (idle dot doesn't pulse). Tap flashes suppressed for
   219→   219→   219→  300 ms to avoid double pulses. Verified working in-browser.
   220→   220→   220→- KEY DECISION — desktop uses lg:h-screen + internal panel scroll so the footer
   221→   221→   221→  stays at the viewport bottom and the canvas fills the height; mobile uses
   222→   222→   222→  natural flow (min-h-screen + mt-auto footer) so the footer is pushed down.
   223→   223→   223→- Store is the only place configs touch the engine (applyBandConfig/
   224→   224→   224→  setBandValue etc.), keeping live-update + persistence consistent everywhere.
   225→   225→   225→- NOTE for Task 5 (integration): /api/rust-scaffold is linked from the Native
   226→   226→   226→  tab but the route does not exist yet (Task 3-b owns it — expect 404 until
   227→   227→   227→  then). BLUEPRINT is still the stub; the Native tab renders whatever 3-b puts
   228→   228→   228→  in it, no UI changes needed. Settings row 'main' currently holds
   229→   229→   229→  defaultScript="Gap The Mind" + default bandConfig from testing (both equal
   230→   230→   230→  defaults — safe to leave or clear). Pre-existing tsc errors in
   231→   231→   231→  src/lib/ava/{audio,script}.ts and examples/ are NOT from this task
   232→   232→   232→  (ignoreBuildErrors is set).
   233→   233→   233→
   234→   234→   234→---
   235→   235→   235→Task ID: 3-b
   236→   236→   236→Agent: general-purpose (Rust scaffold + blueprint) — [timed out at the very end;
   237→   237→   237→        deliverables verified complete by the main agent, which appends this entry]
   238→   238→   238→
   239→   239→   239→Task: Rust/Vulkan native-export scaffold + architecture blueprint + zip download API
   240→   240→   240→
   241→   241→   241→Work Log:
   242→   242→   242→- Built rust-agent/ cargo crate (ava-agent, edition 2021): winit 0.30 (ApplicationHandler
   243→   243→   243→  API), wgpu 22 (Vulkan-first; `vulkan-force` feature for MoltenVK on macOS), cpal 0.15,
   244→   244→   244→  rustfft 6.2, pollster, anyhow
   245→   245→   245→- src/audio.rs — cpal default-input capture, ring buffer, AudioProcessor::poll() per frame
   246→   246→   246→- src/spectrum.rs — Hann-window 8192 FFT, band levels w/ same attack(35ms)/release(220ms)
   247→   247→   247→  smoothing as the web engine
   248→   248→   248→- src/beat.rs — 1:1 port of beat.ts (same constants, median+EMA lock, PLL predictor, taps)
   249→   249→   249→- src/script/{lexer,parser,env,mod}.rs — expression engine + .ava format parser with the
   250→   250→   250→  same lazy-if / assignment-in-args / deterministic-rand semantics
   251→   251→   251→- src/engine.rs — script runtime host (init/frame/beat/point stepping, shared state)
   252→   252→   252→- src/render/{mod.rs,shader.wgsl} — wgpu pipelines: audio-reactive fullscreen background +
   253→   253→   253→  additive point cloud, #[repr(C)] uniforms, persistence via TODO'd feedback texture
   254→   254→   254→- presets/*.ava — all six scripts (5 classics + starter) portable across engines
   255→   255→   255→- Rewrote src/lib/ava/blueprint.ts with 8 real sections (architecture map, wgpu/Vulkan
   256→   256→   256→  strategy, audio pipeline, beat engine, script engine, rendering, per-platform builds,
   257→   257→   257→  roadmap)
   258→   258→   258→- Built src/app/api/rust-scaffold/route.ts (jszip walk, skip target/.git/node_modules)
   259→   259→   259→
   260→   260→   260→Stage Summary:
   261→   261→   261→- Scaffold ~1,700 lines, all files present; zip route verified 200 in dev.log; lint clean.
   262→   262→   262→- NOT compiled (no cargo in sandbox) — scaffold quality, clearly TODO-marked where partial.
   263→   263→   263→
   264→   264→   264→---
   265→   265→   265→Task ID: 5
   266→   266→   266→Agent: main (Z.ai Code)
   267→   267→   267→Task: Integration, lint, agent-browser E2E verification & fixes
   268→   268→   268→
   269→   269→   269→Work Log:
   270→   270→   270→- bun run lint → zero errors across the whole project
   271→   271→   271→- dev.log clean: / 200, /api/presets 200, /api/settings 200, /api/rust-scaffold 200,
   272→   272→   272→  no runtime errors, no hydration warnings
   273→   273→   273→- Agent-browser E2E golden path, all VERIFIED:
   274→   274→   274→  * initial load: idle overlay, 5 preset cards + .avs original links, tabs render
   275→   275→   275→  * Demo Track → canvas lit (30.7% pixels @60fps, 480 pts), footer SRC/FPS/PTS/BPM live
   276→   276→   276→  * footer shows detected 120.0 BPM from the demo kick pattern
   277→   277→   277→  * Set Beat ×4 taps → "Locked: 99.8 BPM" (matches real ~600ms tap intervals), confidence 65%
   278→   278→   278→  * Beat tab: AUDIO badge, beat count, sensitivity ×1.40, min interval 250ms, prediction switch
   279→   279→   279→  * Stop audio → badge switches to PRED, beat count 20→35 (predictor keeps the beat),
   280→   280→   280→    confidence decays 65%→35% — core requirement verified
   281→   281→   281→  * Script editor: broken script → "✘ [point] line 8: Unknown function 'badfunc'";
   282→   282→   282→    fixed script → "✔ Compiled OK — mode: lines, n=300"
   283→   283→   283→  * Help panel: variables table, functions, operators, examples
   284→   284→   284→  * Save as preset → "Smoke Test Ring" listed + toast; two-step delete verified
   285→   285→   285→  * Save as Default → PUT /api/settings verified via curl; reload auto-loads the default
   286→   286→   286→  * Detect tab: Bass 20–100 Hz / Mid 700–2000 Hz / High 7k–16 kHz cards, gains, live
   287→   287→   287→    meters reading real audio (0.78/0.60/0.32)
   288→   288→   288→  * Native tab: blueprint sections render + zip download (116 KB, 25 files, valid zip)
   289→   289→   289→  * Mobile 390×844: responsive, footer pushed naturally, sticks to viewport bottom when scrolled
   290→   290→   290→- Cleanup: deleted the test preset, cleared test defaultScript (DB + localStorage) so a
   291→   291→   291→  fresh visit loads "Gap The Mind"
   292→   292→   292→
   293→   293→   293→Stage Summary:
   294→   294→   294→- ALL acceptance criteria verified in-browser. Zero console errors. The application is
   295→   295→   295→  fully interactive: 3-band detection, beat detection + prediction + tap learning, AVS-style
   296→   296→   296→  scripting with editor/help/save/load, 5 authentic presets (adapted), Rust scaffold export.
   297→   297→   297→
   298→   298→   298→---
   299→   299→   299→Task ID: 6
   300→   300→   300→Agent: general-purpose
   301→   301→   301→Task: "Stream a link" backend — yt-dlp link resolution + same-origin audio byte proxy (POST /api/resolve, GET /api/audio/stream)
   302→   302→   302→
   303→   303→   303→Work Log:
   304→   304→   304→- Read worklog (Tasks 1–5) and existing routes; confirmed dev server already running on :3000
   305→   305→   305→  (Node, next-server v16.1.3) — never restarted it; no build, no new deps, no git
   306→   306→   306→- Installed yt-dlp standalone binary: bin/yt-dlp (GitHub latest yt-dlp_linux), chmod +x,
   307→   307→   307→  --version prints 2026.10.21
   308→   308→   308→- src/lib/server/ssrf.ts — assertPublicHttpUrl(raw): http(s) only, explicit port must be 80/443,
   309→   309→   309→  localhost/.localhost/.local/.internal banned, IPv4 privates (0/8, 10/8, 100.64/10, 127/8,
   310→   310→   310→  169.254/16, 172.16/12, 192.168/16), IPv6 ::/::1/fc00::/7/fe80::/10 plus IPv4-mapped
   311→   311→   311→  ::ffff:a.b.c.d (embedded v4 checked; hand-written IPv6 expander handles v4 tails + zone ids),
   312→   312→   312→  then dns.promises.lookup(all:true) with EVERY result re-checked by the same rules (kills
   313→   313→   313→  nip.io / DNS-rebind tricks). Throws user-safe messages; returns the parsed URL.
   314→   314→   314→- src/lib/server/stream-store.ts — Map on globalThis.__avaStreams via a typed interface with an
   315→   315→   315→  optional property + `??=` (no `any`): token = randomBytes(16).hex (32 chars), entries
   316→   316→   316→  { remoteUrl, title, source, expires }, 30-min sliding TTL, prune-on-every-access; exports
   317→   317→   317→  createStreamEntry / getStreamEntry / refreshStreamEntry.
   318→   318→   318→- src/app/api/resolve/route.ts — JSON body { url } (≤2048, trim) → 400s; SSRF gate → 400;
   319→   319→   319→  10-min success cache on globalThis.__avaResolveCache (repeat links replay instantly);
   320→   320→   320→  direct-audio bypass for .mp3 .m4a .aac .ogg .oga .opus .wav .flac .mp4 .webm (source "direct",
   321→   321→   321→  title = decoded last path segment, fallback hostname); otherwise yt-dlp
   322→   322→   322→  -J --no-warnings --no-playlist --no-progress --socket-timeout 15
   323→   323→   323→  -f "bestaudio[protocol^=http]/bestaudio/best" with a 30 s kill → 504; non-zero exit →
   324→   324→   324→  ANSI/control-stripped stderr tail (300 chars) → 422 ("Unsupported URL" gets its own message);
   325→   325→   325→  stream URL pick = data.url ?? requested_formats[0].url ?? last http-protocol format;
   326→   326→   326→  .m3u8/.mpd path or m3u8/mpd/dash protocol → 422 adaptive message; SSRF re-check on the
   327→   327→   327→  RESOLVED stream URL (public CDNs like googlevideo pass) → 422 if not; title control-stripped +
   328→   328→   328→  clamped 140 (fallback "Stream"), source = extractor_key|extractor|hostname lowercase,
   329→   329→   329→  durationSec = numeric duration or null.
   330→   330→   330→- src/app/api/audio/stream/route.ts — token → entry (prune first) else 404; SSRF re-check of the
   331→   331→   331→  stored remoteUrl; forwards the client Range header, Chrome UA, redirect follow, no-store;
   332→   332→   332→  !ok → 502 `Upstream failed (HTTP n).`; content-type must be audio/*, video/*,
   333→   333→   333→  application/octet-stream or application/ogg else 502 "Upstream did not return audio.";
   334→   334→   334→  refreshes sliding TTL, then passes through the upstream status with content-type/-length/
   335→   335→   335→  -range/accept-ranges (only when upstream provided them) + Cache-Control: public, max-age=1800.
   336→   336→   336→- FIX found while testing: the upstream host intermittently RST/ETIMEDOUTs full (non-ranged)
   337→   337→   337→  fetches — verified against raw node fetch (1/6 ETIMEDOUT) — added ONE immediate retry on
   338→   338→   338→  network-level failure only (HTTP error statuses are never retried); after that: 2× full GET
   339→   339→   339→  200 audio/mpeg 8,945,229 bytes.
   340→   340→   340→- tsc --noEmit: zero errors in the new files (the project's 8 pre-existing errors are all in
   341→   341→   341→  src/lib/ava, examples/, skills/, rust-scaffold — untouched).
   342→   342→   342→
   343→   343→   343→Stage Summary:
   344→   344→   344→- yt-dlp: /home/z/my-project/bin/yt-dlp, version 2026.10.21 (runtime order: $AVA_YTDLP →
   345→   345→   345→  <cwd>/bin/yt-dlp if existsSync → "yt-dlp" on PATH)
   346→   346→   346→- Files created (nothing else touched, no frontend files): bin/yt-dlp, src/lib/server/ssrf.ts,
   347→   347→   347→  src/lib/server/stream-store.ts, src/app/api/resolve/route.ts, src/app/api/audio/stream/route.ts
   348→   348→   348→- Test 1 MUST-PASS direct MP3 (soundhelix Song-1): resolve → ok:true, source:"direct",
   349→   349→   349→  title:"SoundHelix-Song-1.mp3"; full stream GET → 200 audio/mpeg 8,945,229 B (>1 MB; takes ~30 s
   350→   350→   350→  because the origin throttles at ~300 KB/s — proxy adds ~0); Range 0-1023 → 206 with
   351→   351→   351→  content-range "bytes 0-1023/8945229", accept-ranges, cache-control all verified
   352→   352→   352→- Test 2 MUST-PASS SSRF: http://127.0.0.1/x → 400, http://169.254.169.254/latest/meta-data → 400,
   353→   353→   353→  ftp://example.com/a.mp3 → 400. Extras: localhost:8080 → 400 (port), foo.bar.local → 400,
   354→   354→   354→  [::1] → 400, [::ffff:10.0.0.5] → 400 (v4-mapped), 127.0.0.1.nip.io → 400 (DNS-result check),
   355→   355→   355→  "not a url" / {} / {"url":5} / bad JSON → 400 "Expected { url } JSON body."
   356→   356→   356→- Test 3 YouTube jNQXAC9IVRw: bot-blocked from this datacenter IP ("Sign in to confirm you're not
   357→   357→   357→  a bot"). Tried the 2 extractor-args variants (youtube:player_client=web_embedded, then =tv)
   358→   358→   358→  within the 5-minute budget — still blocked. Surfaces as a clean 422 with the sanitized tail:
   359→   359→   359→  "Could not extract audio from that link: …Sign in to confirm you're not a bot…". Honest
   360→   360→   360→  outcome: blocked here, ACCEPTABLE per spec (would work from residential IPs / with cookies).
   361→   361→   361→- Test 4 SoundCloud forss/flickermood: yt-dlp extracts fine (title "Flickermood", 213.9 s) but
   362→   362→   362→  this serve only exposes m3u8_native formats (hls_aac_96k/160k — confirmed in raw -J JSON) →
   363→   363→   363→  clean 422 adaptive(HLS/DASH) message, exactly the manifest-only contract case.
   364→   364→   364→- Test 5 https://example.com/ → clean 422 "That site is not supported — try YouTube, SoundCloud,
   365→   365→   365→  or a direct MP3 link."; example.com/stream.m3u8 → 422 (does NOT hit the direct bypass).
   366→   366→   366→- Extractor SUCCESS path proven end-to-end with archive.org: resolve → ok:true,
   367→   367→   367→  title:"mp3 test file", source:"archiveorg", durationSec:12.42; stream → 200 audio/mpeg
   368→   368→   368→  198,658 B + 206 ranged; cache replay 16 ms.
   369→   369→   369→- Stream negatives: unknown/missing token → 404 "Unknown or expired stream token"; upstream 500
   370→   370→   370→  (missing file) → 502 "Upstream failed (HTTP 500)."
   371→   371→   371→- lint: my 4 files pass eslint clean; `bun run lint` overall reports exactly 1 remaining error in
   372→   372→   372→  src/components/ava/link-dialog.tsx:72 (set-state-in-effect) — that file is owned by the parallel
   373→   373→   373→  frontend agent and was NOT touched by me per the ownership rules.
   374→   374→   374→- dev.log: no exceptions/stack traces from the new routes — only expected
   375→   375→   375→  200/206/400/404/422/502 request lines.
   376→   376→   376→- Deviations from spec (all deliberate): (1) one network-error retry in the proxy (upstream RSTs,
   377→   377→   377→  never retries HTTP statuses); (2) third store helper refreshStreamEntry() — the two required
   378→   378→   378→  helpers plus this one implements the specified "refresh sliding expiry AFTER upstream success";
   379→   379→   379→  (3) proxy fetch uses cache:'no-store'; (4) 500 wording "Audio extractor unavailable (yt-dlp not
   380→   380→   380→  found or failed to start)."; (5) success cache keyed by the normalized URL href (target.href).
   381→   381→   381→
   382→   382→   382→---
   383→   383→   383→Task ID: 7
   384→   384→   384→Agent: main (Z.ai Code)
   385→   385→   385→Task: Frontend integration of the "Link" audio source (YouTube / SoundCloud / direct MP3)
   386→   386→   386→
   387→   387→   387→Work Log:
   388→   388→   388→- Read worklog + all relevant files (audio.ts, store.ts, audio-source.ts, header.tsx,
   389→   389→   389→  visual-stage.tsx, footer-bar.tsx, types.ts) before editing.
   390→   390→   390→- src/lib/ava/types.ts — AudioSourceKind += 'link'
   391→   391→   391→- src/lib/ava/audio.ts — new startUrl(streamUrl, title): same-origin proxied <audio> element →
   392→   392→   392→  MediaElementAudioSourceNode → analyser (NOT cross-origin-tainted, so FFT works) → speakers;
   393→   393→   393→  loops by default; public sourceLabel field (file name / stream title) maintained by all
   394→   394→   394→  start* methods + stopSources
   395→   395→   395→- src/lib/store.ts — AudioSourceState += 'link'; new sourceTitle + linkDialogOpen state
   396→   396→   396→- src/components/ava/audio-source.ts — new resolveAndPlayLink(url): POST /api/resolve →
   397→   397→   397→  engine.audio.startUrl → store sync; never throws (returns {ok,title,source,error}); on
   398→   398→   398→  playback failure stops the engine and resets store; syncSource now also syncs sourceTitle
   399→   399→   399→- src/components/ava/link-dialog.tsx — NEW: dialog with URL input + Load button (spinner),
   400→   400→   400→  inline error box with YouTube bot-wall hint, RECENT LINKS chips (localStorage, max 5,
   401→   401→   401→  one-click reload); body REMOUNTS on every open (fresh state — no setState-in-effect, fixes
   402→   402→   402→  the lint error the Task 6 agent saw mid-build); results arriving after the user closed the
   403→   403→   403→  dialog surface as toasts
   404→   404→   404→- src/components/ava/header.tsx — "Link" segment button between File and Stop (opens dialog);
   405→   405→   405→  <LinkDialog /> mounted in the header
   406→   406→   406→- src/components/ava/visual-stage.tsx — idle overlay gains a 4th button "Stream a Link" +
   407→   407→   407→  updated copy
   408→   408→   408→- src/components/ava/footer-bar.tsx — SRC now shows "LINK · <title>" (truncated) for the
   409→   409→   409→  active source; title also shown for File sources
   410→   410→   410→- src/app/api/resolve/route.ts (main-agent touch-up, coordinated with Task 6's file): added
   411→   411→   411→  BOT_WALL_RE mapping so YouTube's "Sign in to confirm you're not a bot" stderr returns a
   412→   412→   412→  clean actionable 422 instead of a raw yt-dlp tail; client hint suppressed when the server
   413→   413→   413→  message already explains the fix (no duplication)
   414→   414→   414→
   415→   415→   415→Stage Summary:
   416→   416→   416→- Full link-source flow wired: header/idle-overlay → dialog → resolve → proxied playback →
   417→   417→   417→  band analysis + beat detection + visuals, all client-side after resolution. Zero layout
   418→   418→   418→  changes beyond the additive bits; lint clean.
   419→   419→   419→
   420→   420→   420→---
   421→   421→   421→Task ID: 8
   422→   422→   422→Agent: main (Z.ai Code)
   423→   423→   423→Task: E2E verification (agent-browser) of the link source + regression checks
   424→   424→   424→
   425→   425→   425→Work Log:
   426→   426→   426→- bun run lint → zero errors; dev.log clean (no exceptions)
   427→   427→   427→- Initial load: header shows Demo/Mic/File/LINK/Stop; idle overlay has 4 buttons incl.
   428→   428→   428→  "Stream a Link"; presets/tabs intact
   429→   429→   429→- Link dialog: opens from idle overlay AND header; invalid input ("not a url") → inline

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