From 9607c8558f8580774b1735bf0b1fd808d3b2470d Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Thu, 29 Oct 2026 21:34:15 +0100
Subject: [PATCH 1/6] Add plan for the Transformers.js 4.3.2 upgrade
 (workstream 1)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/plans/001-1-transformers-upgrade.md | 122 +++++++++++++++++++++++
 1 file changed, 122 insertions(+)
 create mode 100644 docs/plans/001-1-transformers-upgrade.md

diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
new file mode 100644
index 0000000..851c621
--- /dev/null
+++ b/docs/plans/001-1-transformers-upgrade.md
@@ -0,0 +1,122 @@
+---
+status: in-progress
+---
+
+# 001-1 — Transformers.js 4.2.0 → 4.3.2 Implementation Plan
+
+> **For agentic workers:** REQUIRED SUB-SKILL: superpowers:executing-plans (inline, no nested
+> subagents — coordination plan rule). Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** run the browser engine on `@huggingface/transformers` 4.3.2 with the D-027/D-028
+sequential-session patch carried over, and re-test the decisions the upgrade may obsolete.
+
+**Architecture:** dependency bump + `bun patch` regeneration; a small runtime-guard test file pins
+the installed version, the patch, and the upstream seek-loop condition D-021 depends on, so a future
+bump that silently drops the patch or changes the condition fails the fast suite. Re-tests run as
+scratch measurement scripts outside the repo (`/tmp/ws1/`); their numbers go into `D-WS1*` entries.
+
+**Tech Stack:** Bun 1.3, `@huggingface/transformers` 4.3.2 (onnxruntime-web 1.31.0-dev.20260914,
+onnxruntime-node 1.30.0), bun:test.
+
+**Spec:** `docs/specs/001-transcription-quality-and-speed.md` (Goal 1); coordination rules in
+`docs/plans/001-0-coordination.md`.
+
+## Global Constraints
+
+- Bun only; no new runtime dependency; transformers stays a devDependency (D-031).
+- New decisions are `## D-WS1<letter> — …` appended at the bottom of `docs/Decisions.md`; Accepted
+  entries are superseded, never rewritten.
+- Heavy commands (real-model runs, benchmarks, model downloads, full `bun test`) under
+  `flock /tmp/whisper-heavy.lock`. Ports 3110–3119. No push, no publishing.
+- Measurements are CPU numbers (onnxruntime-node, or onnxruntime-web wasm EP under Bun); say which.
+- No WebGPU-only default change ships on WASM numbers; WebGPU items → "needs owner's browser check".
+
+## Review Focus
+
+1. **Patch silently lost on reinstall** (lockfile/`patchedDependencies` key mismatch) → the app
+   loads fine but mobile OOM returns. Pinned by Task 1's patch-applied test.
+2. **onnxruntime-web file names changed** (new version may ship different `.mjs/.wasm` names) →
+   `/ort/` serving and `dist/ort` copy must still contain what ort-web requests. Task 1: build and
+   check `dist/ort/` contains `ort-wasm-simd-threaded.jsep.{mjs,wasm}` (the WebGPU bundle's files).
+3. **Upstream changes the seek-loop condition** → D-021's `max_new_tokens` could become wrong or
+   unneeded without notice. Pinned by Task 2's source-tripwire test.
+4. **onnxruntime-node 1.30 drifts real-model WER** → `tests/live-real-model.test.ts` under the lock
+   (Task 5).
+5. **q8 decoders on WASM at default optimization level** (D-014's failure) — Task 3 measures every
+   level before any change to the worker's session options.
+
+---
+
+### Task 1: Upgrade to 4.3.2 and carry the patch
+
+**Files:**
+- Create: `tests/transformers-runtime.test.ts`
+- Modify: `package.json`, `bun.lock`, `AGENTS.md` (patch path), `docs/WorkBreakdown.md`
+- Create: `patches/@huggingface%2Ftransformers@4.3.2.patch`; Delete: the 4.2.0 patch
+
+**Interfaces:**
+- Produces: `tests/transformers-runtime.test.ts` (Task 2 adds a case to it).
+
+- [ ] **Step 1: Write the failing test** `describe("@huggingface/transformers runtime")`:
+  - `"installed version is the pinned 4.3.2"` — `node_modules/@huggingface/transformers/package.json`
+    `.version === "4.3.2"`.
+  - `"patchedDependencies points at an existing patch for the installed version"` — root
+    `package.json` `patchedDependencies["@huggingface/transformers@4.3.2"]` is a path that exists.
+  - `"web bundle's constructSessions carries the sequential-load patch (D-027/D-028)"` — the
+    `constructSessions` function text sliced from `dist/transformers.web.js` contains
+    `options?.sequentialSessionLoad` and both `Promise.all(` and `for (const name of Object.keys(names))`.
+- [ ] **Step 2: Run** `bun test tests/transformers-runtime.test.ts` → FAIL on version (4.2.0) and key.
+- [ ] **Step 3:** `bun add -d @huggingface/transformers@4.3.2` (remove the 4.2.0
+  `patchedDependencies` entry first if bun refuses), `bun patch @huggingface/transformers`, re-apply
+  the 4.2.0 hunk to `constructSessions` in `dist/transformers.web.js` (upstream is unchanged:
+  still a bare `Promise.all`), `bun patch --commit node_modules/@huggingface/transformers`.
+  `git rm` the 4.2.0 patch. Re-link the shared `.cache` symlink if the reinstall removed it.
+- [ ] **Step 4: Run** the test → PASS; `bun install --frozen-lockfile` clean; typecheck; fast
+  suite; `bun run build`; `ls dist/ort` shows the files ort-web 1.31 requests.
+- [ ] **Step 5:** docs: AGENTS.md patch filename; `D-WS1a` (upgrade, patch carried, why upstream
+  doesn't obsolete it, ort versions, Parakeet = CTC only); WorkBreakdown tick. Commit
+  "Upgrade @huggingface/transformers to 4.3.2 and carry the sequential-session patch".
+
+### Task 2: D-021 re-test (seek loop)
+
+**Files:** Modify `tests/transformers-runtime.test.ts`, `docs/Decisions.md`,
+`src/worker/inference.worker.ts` (comment only: "4.2" → "4.2–4.3", cite D-WS1b).
+
+- [ ] **Step 1: Test** `"Whisper generate still takes the seek loop when max_new_tokens is unset (D-021)"`
+  — `src/models/whisper/modeling_whisper.js` contains
+  `if (generation_config.return_timestamps && !kwargs.max_new_tokens)`. Run → PASS expected
+  (tripwire; it encodes the revisit condition, verified against the 4.3.2 source).
+- [ ] **Step 2: Measure** (`/tmp/ws1/d021.ts`, onnxruntime-node, under the lock): tiny.en q8 on
+  `en_alien.opus` (ffmpeg-static → 16 kHz f32), pipeline options as the worker
+  (`chunk_length_s 30, stride_length_s 5, return_timestamps true`), with and without
+  `max_new_tokens: 440`; record wall-clock, generate-pass count (wrap `model.generate`), window
+  count, WER vs `en_alien.txt` (`tests/dsp.ts` `wordErrorRate`).
+- [ ] **Step 3:** `D-WS1b` with the numbers; keep `max_new_tokens: 440` unless the seek path is now
+  both faster and not worse on WER. Commit.
+
+### Task 3: D-014 re-test (WASM graphOptimizationLevel)
+
+**Files:** `docs/Decisions.md`; `src/worker/inference.worker.ts` only if the outcome is "drop".
+
+- [ ] **Step 1: Measure** (`/tmp/ws1/d014.ts`): `globalThis[Symbol.for("onnxruntime")] =
+  await import("onnxruntime-web")` before importing transformers, wasm EP, 1 thread; for
+  `onnx-community/whisper-tiny` `decoder_model_merged_quantized.onnx` create a session at
+  `disabled/basic/extended/all`; record success/error. If all load: transcribe `en_aiproblem` with
+  tiny.en q8 at `basic` vs default (`all`), 3 warm runs each, wall-clock + text identity.
+- [ ] **Step 2:** If default fails → keep, `D-WS1c` "still needed on ort-web 1.31.0-dev". If it
+  loads and is not slower → remove the override (worker comment cites D-WS1c), run a q8 transcribe
+  again through the harness with the worker's new options. Commit.
+
+### Task 4: WebGPU-affecting changes (D-022, D-025/D-026) — inspection only
+
+- [ ] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
+  WebGPU/fp16/Firefox/Safari changes; check ort-web 1.31 dist for Gecko/fp16 handling.
+- [ ] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
+  (explicit WebGPU on Firefox for D-026; medium fp16 for D-022; Safari 26 WebGPU). No code change.
+  Commit.
+
+### Task 5: Verify and finish
+
+- [ ] typecheck, fast suite, build green; `flock /tmp/whisper-heavy.lock bun test
+  tests/live-real-model.test.ts` green; record WER per clip in D-WS1a if changed from the bars.
+- [ ] `git status` clean; last commit `git rm docs/plans/001-1-transformers-upgrade.md`.

From 753ea0397904fb6ba671644bd11b7553f9b44f88 Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Thu, 29 Oct 2026 21:44:18 +0100
Subject: [PATCH 2/6] Upgrade @huggingface/transformers to 4.3.2 and carry the
 sequential-session patch

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 AGENTS.md                                     |  2 +-
 bun.lock                                      | 98 +++++++++----------
 docs/Decisions.md                             | 28 ++++++
 docs/WorkBreakdown.md                         |  4 +
 docs/plans/001-1-transformers-upgrade.md      | 10 +-
 package.json                                  |  4 +-
 ...> @huggingface%2Ftransformers@4.3.2.patch} |  7 +-
 tests/transformers-runtime.test.ts            | 50 ++++++++++
 8 files changed, 136 insertions(+), 67 deletions(-)
 rename patches/{@huggingface%2Ftransformers@4.2.0.patch => @huggingface%2Ftransformers@4.3.2.patch} (88%)
 create mode 100644 tests/transformers-runtime.test.ts

diff --git a/AGENTS.md b/AGENTS.md
index de0e81b..7f9e600 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -38,7 +38,7 @@ step with the commands above, in the same commit.
   `src/worker/inference.worker.ts` only — never on the main thread. Server inference = faster-whisper
   via `server-py/sidecar.py` — never Transformers.js on the server.
 - **`@huggingface/transformers` is patched and a devDependency on purpose.** It is pinned by
-  `patches/@huggingface%2Ftransformers@4.2.0.patch` (D-027/D-028) and kept out of runtime deps so the
+  `patches/@huggingface%2Ftransformers@4.3.2.patch` (D-027/D-028, D-WS1a) and kept out of runtime deps so the
   Docker image stays small (D-031). Upgrading or moving it means redoing the patch: ask first.
 - **No cross-origin subresources.** Every response carries COOP/COEP `require-corp` (D-023,
   `src/index.ts`); a CDN script/style/font will be blocked. Self-host it (onnxruntime is served from `/ort/`).
diff --git a/bun.lock b/bun.lock
index 5059fc1..5871853 100644
--- a/bun.lock
+++ b/bun.lock
@@ -12,7 +12,7 @@
       },
       "devDependencies": {
         "@fontsource-variable/inter": "^5.3.0",
-        "@huggingface/transformers": "^4.2.0",
+        "@huggingface/transformers": "4.3.2",
         "@types/bun": "latest",
         "@types/passport": "^1.0.17",
         "@types/passport-local": "^1.0.38",
@@ -27,70 +27,74 @@
     "ffmpeg-static",
   ],
   "patchedDependencies": {
-    "@huggingface/transformers@4.2.0": "patches/@huggingface%2Ftransformers@4.2.0.patch",
+    "@huggingface/transformers@4.3.2": "patches/@huggingface%2Ftransformers@4.3.2.patch",
   },
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+    "@img/sharp-libvips-linux-x64": ["@img/sharp-libvips-linux-x64@1.3.4", "", { "os": "linux", "cpu": "x64" }, "sha512-GJ//SSXbnwSDes02umB3nDJLFcQzw8a18V8fyhqr6tV515tOEMdImjjxj1AoafMRz56F3PHgftnj1QEKSU1zkw=="],
 
-    "@img/sharp-libvips-linuxmusl-x64": ["@img/sharp-libvips-linuxmusl-x64@1.2.4", "", { "os": "linux", "cpu": "x64" }, "sha512-+LpyBk7L44ZIXwz/VYfglaX/okxezESc6UxDSoyo2Ks6Jxc4Y7sGjpgU9s4PMgqgjj1gZCylTieNamqA1MF7Dg=="],
+    "@img/sharp-libvips-linuxmusl-arm64": ["@img/sharp-libvips-linuxmusl-arm64@1.3.4", "", { "os": "linux", "cpu": "arm64" }, "sha512-hvulFwtjUcagsis6BBxHwGFwWoNZjgYmULGVrZcyfNbjA8hKILbRxGg15/7w5HDyXHXUos/j6baAWqnCyQ2DWA=="],
 
-    "@img/sharp-linux-arm": ["@img/sharp-linux-arm@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-arm": "1.2.4" }, "os": "linux", "cpu": "arm" }, "sha512-9dLqsvwtg1uuXBGZKsxem9595+ujv0sJ6Vi8wcTANSFpwV/GONat5eCkzQo/1O6zRIkh0m/8+5BjrRr7jDUSZw=="],
+    "@img/sharp-libvips-linuxmusl-x64": ["@img/sharp-libvips-linuxmusl-x64@1.3.4", "", { "os": "linux", "cpu": "x64" }, "sha512-6zXKeE/p39I1AmA3cJG35eyBGNqNddLnUXjhwBnsGjFPWqf5VKkDBEqaEkPDoTEtkxwi2vv8Tcr2mDyP4So7Fg=="],
 
-    "@img/sharp-linux-arm64": ["@img/sharp-linux-arm64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-arm64": "1.2.4" }, "os": "linux", "cpu": "arm64" }, "sha512-bKQzaJRY/bkPOXyKx5EVup7qkaojECG6NLYswgktOZjaXecSAeCWiZwwiFf3/Y+O1HrauiE3FVsGxFg8c24rZg=="],
+    "@img/sharp-linux-arm": ["@img/sharp-linux-arm@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-arm": "1.3.4" }, "os": "linux", "cpu": "arm" }, "sha512-LEaXK2WdXVK5ykcw0buWyPMsmLLL2vpHLD6yrNSW+JGEL3BZPA4tpKN6iaMc4AxTTAoaX/sU1rOL51lcIz48ZQ=="],
 
-    "@img/sharp-linux-ppc64": ["@img/sharp-linux-ppc64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-ppc64": "1.2.4" }, "os": "linux", "cpu": "ppc64" }, "sha512-7zznwNaqW6YtsfrGGDA6BRkISKAAE1Jo0QdpNYXNMHu2+0dTrPflTLNkpc8l7MUP5M16ZJcUvysVWWrMefZquA=="],
+    "@img/sharp-linux-arm64": ["@img/sharp-linux-arm64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-arm64": "1.3.4" }, "os": "linux", "cpu": "arm64" }, "sha512-LYVx5JTsOM2CBzmxreh+nl64/3H6Xb09iSLknqH47z2T2DFFxDeFLP5y4dJwe6H7uGQlHPyEEtIqyo3DYsRwdQ=="],
 
-    "@img/sharp-linux-riscv64": ["@img/sharp-linux-riscv64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-riscv64": "1.2.4" }, "os": "linux", "cpu": "none" }, "sha512-51gJuLPTKa7piYPaVs8GmByo7/U7/7TZOq+cnXJIHZKavIRHAP77e3N2HEl3dgiqdD/w0yUfiJnII77PuDDFdw=="],
+    "@img/sharp-linux-ppc64": ["@img/sharp-linux-ppc64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-ppc64": "1.3.4" }, "os": "linux", "cpu": "ppc64" }, "sha512-QVxAAq8evVRI9ia2vqgwrmWucn5Dfv+JdWzj75pD8omHLPSP7f8p20O8jxzjCcuCEQEOtYOZUmX1hkiZ0kdevA=="],
 
-    "@img/sharp-linux-s390x": ["@img/sharp-linux-s390x@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-s390x": "1.2.4" }, "os": "linux", "cpu": "s390x" }, "sha512-nQtCk0PdKfho3eC5MrbQoigJ2gd1CgddUMkabUj+rBevs8tZ2cULOx46E7oyX+04WGfABgIwmMC0VqieTiR4jg=="],
+    "@img/sharp-linux-riscv64": ["@img/sharp-linux-riscv64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-riscv64": "1.3.4" }, "os": "linux", "cpu": "none" }, "sha512-LtdreXguaavKODPIfzJ4kffx7UNt1omwtK0rch4EBbbSTXPnxWmYSayXdLJw0fJzQ97kHt1gL/yh4tvU+nCyRQ=="],
 
-    "@img/sharp-linux-x64": ["@img/sharp-linux-x64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-x64": "1.2.4" }, "os": "linux", "cpu": "x64" }, "sha512-MEzd8HPKxVxVenwAa+JRPwEC7QFjoPWuS5NZnBt6B3pu7EG2Ge0id1oLHZpPJdn3OQK+BQDiw9zStiHBTJQQQQ=="],
+    "@img/sharp-linux-s390x": ["@img/sharp-linux-s390x@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-s390x": "1.3.4" }, "os": "linux", "cpu": "s390x" }, "sha512-UZasTOFiYzotTsGOCu42BfUzP6Tu6Do/947iRm1RsLKvlllxwGcn4RN27LibGWceix4Y+Pmw3jsnTcCQIgWjqA=="],
 
-    "@img/sharp-linuxmusl-arm64": ["@img/sharp-linuxmusl-arm64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linuxmusl-arm64": "1.2.4" }, "os": "linux", "cpu": "arm64" }, "sha512-fprJR6GtRsMt6Kyfq44IsChVZeGN97gTD331weR1ex1c1rypDEABN6Tm2xa1wE6lYb5DdEnk03NZPqA7Id21yg=="],
+    "@img/sharp-linux-x64": ["@img/sharp-linux-x64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linux-x64": "1.3.4" }, "os": "linux", "cpu": "x64" }, "sha512-SxFtLTeJInhAA9Q836kux2vZNeOBQEx658qvbboZScr0wIARym3IcGmW7KpVD5sbVg0Ojy+udFQdayYIZyoNog=="],
 
-    "@img/sharp-linuxmusl-x64": ["@img/sharp-linuxmusl-x64@0.34.5", "", { "optionalDependencies": { "@img/sharp-libvips-linuxmusl-x64": "1.2.4" }, "os": "linux", "cpu": "x64" }, "sha512-Jg8wNT1MUzIvhBFxViqrEhWDGzqymo3sV7z7ZsaWbZNDLXRJZoRGrjulp60YYtV4wfY8VIKcWidjojlLcWrd8Q=="],
+    "@img/sharp-linuxmusl-arm64": ["@img/sharp-linuxmusl-arm64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linuxmusl-arm64": "1.3.4" }, "os": "linux", "cpu": "arm64" }, "sha512-9HbMclmI1zlNkFRs3z9/eBtDjfD0sGlrX1z6b1qwmiFY5ElDLh4BC0LPBdVp7z1DXFiKlIcznf+ZlsuZzLxQqg=="],
 
-    "@img/sharp-wasm32": ["@img/sharp-wasm32@0.34.5", "", { "dependencies": { "@emnapi/runtime": "^1.7.0" }, "cpu": "none" }, "sha512-OdWTEiVkY2PHwqkbBI8frFxQQFekHaSSkUIJkwzclWZe64O1X4UlUjqqqLaPbUpMOQk6FBu/HtlGXNblIs0huw=="],
+    "@img/sharp-linuxmusl-x64": ["@img/sharp-linuxmusl-x64@0.35.5", "", { "optionalDependencies": { "@img/sharp-libvips-linuxmusl-x64": "1.3.4" }, "os": "linux", "cpu": "x64" }, "sha512-4KOphqB035HrVdqLZfCgMzzERrQkkzOwRhl4OAkRO1YCldbaFjySXMaK534Mo0V+LndnlJk+sbUyLeU0ULyD1A=="],
 
-    "@img/sharp-win32-arm64": ["@img/sharp-win32-arm64@0.34.5", "", { "os": "win32", "cpu": "arm64" }, "sha512-WQ3AgWCWYSb2yt+IG8mnC6Jdk9Whs7O0gxphblsLvdhSpSTtmu69ZG1Gkb6NuvxsNACwiPV6cNSZNzt0KPsw7g=="],
+    "@img/sharp-wasm32": ["@img/sharp-wasm32@0.35.5", "", { "dependencies": { "@emnapi/runtime": "^1.11.3" } }, "sha512-Ptsga1su4tQx+LLF1ECS9U6nz5kmrXKo6XVbtR48Ke3ZRxxgaWBu7IDtEe1quo8hiupwm6WFqxVlXaSf7IINGQ=="],
 
-    "@img/sharp-win32-ia32": ["@img/sharp-win32-ia32@0.34.5", "", { "os": "win32", "cpu": "ia32" }, "sha512-FV9m/7NmeCmSHDD5j4+4pNI8Cp3aW+JvLoXcTUo0IqyjSfAZJ8dIUmijx1qaJsIiU+Hosw6xM5KijAWRJCSgNg=="],
+    "@img/sharp-webcontainers-wasm32": ["@img/sharp-webcontainers-wasm32@0.35.5", "", { "dependencies": { "@img/sharp-wasm32": "0.35.5" }, "cpu": "none" }, "sha512-hfhF/FmoQyTUkA0bIKFOtw536BQSeBMe6BF6QyWlrPxT754+TFLaZ7sKKTfvvM0yJgKgaYTwnFCIZ/GuDw5SUA=="],
 
-    "@img/sharp-win32-x64": ["@img/sharp-win32-x64@0.34.5", "", { "os": "win32", "cpu": "x64" }, "sha512-+29YMsqY2/9eFEiW93eqWnuLcWcufowXewwSNIT6UwZdUUCrM3oFjMWH/Z6/TMmb4hlFenmfAVbpWeup2jryCw=="],
+    "@img/sharp-win32-arm64": ["@img/sharp-win32-arm64@0.35.5", "", { "os": "win32", "cpu": "arm64" }, "sha512-X4t7g+7ZA5DKblCBEXGjUqqemj4vczING/5viFwAL8h4N3qYeyjwdCvRLHi4EdOUI+2Z7UFlp1VM+p/AuEtm6Q=="],
+
+    "@img/sharp-win32-ia32": ["@img/sharp-win32-ia32@0.35.5", "", { "os": "win32", "cpu": "ia32" }, "sha512-5Zm82LoBc43nhwNybZlG7Y1KO//Zhsn306fQl29ZOuStHLGTo3BWL83q3cznX0poxSAMuYL1On/BHBxkBeKr6A=="],
+
+    "@img/sharp-win32-x64": ["@img/sharp-win32-x64@0.35.5", "", { "os": "win32", "cpu": "x64" }, "sha512-x76eH0vEiHlcMQu8Y8IenntaACtddpT6W0wmXtWrnKcnKI7ME5DdgqhAD6SEWOEl1v2zDvkZDhFA9KnURwpfqg=="],
 
     "@protobufjs/aspromise": ["@protobufjs/aspromise@1.1.2", "", {}, "sha512-j+gKExEuLmKwvz3OgROXtrJ2UG2x8Ch2YZUxahh+s1F2HZ+wAceUNLkvy6zKCPVRkU++ZWQrdxsUeQXmcg4uoQ=="],
 
@@ -182,12 +186,10 @@
 
     "@typescript/typescript-win32-x64": ["@typescript/typescript-win32-x64@7.0.2", "", { "os": "win32", "cpu": "x64" }, "sha512-0BQ3HkAHHlKLSp1qRvf3SUhGpGsDuhB/jgFw75guyqbxJqEaS0Cw/VFO8i2nHglJUzQCRtMMR/IBAKE3ETMC4g=="],
 
-    "adm-zip": ["adm-zip@0.5.18", "", {}, "sha512-ufJnssQGbxzLNS1Ho9bCtX4rQKCCvoVuDLHoJyc3F9dOGDB4BkWs2Ci0kv53lqocAEQ/Cbi+I2XCsNYGqVYqng=="],
+    "adm-zip": ["adm-zip@0.6.1", "", {}, "sha512-Xwrja8nx9e5o2N1my4DsKCeKpdrnACyr1wtbPxBDgGzKzKyE9kRtBFA8mWldI+RVlD7CBZNWY/wQ2+ydwOR6kQ=="],
 
     "agent-base": ["agent-base@6.0.2", "", { "dependencies": { "debug": "4" } }, "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ=="],
 
-    "boolean": ["boolean@3.2.0", "", {}, "sha512-d0II/GO9uf9lfUHH2BQsjxzRJZBdsjgsBiW4BvhWk/3qoKwQFjIDVN19PfX8F2D/r9PCMTtLWjYVCFrpeYUzsw=="],
-
     "buffer-from": ["buffer-from@1.1.2", "", {}, "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ=="],
 
     "bun-types": ["bun-types@1.3.14", "", { "dependencies": { "@types/node": "*" } }, "sha512-4N0ig0fEomHt5R0KCFWjovxow98rIoRwKolrYdCcknNwMekCXRnWEUvgu5soYV8QXtVsrUD8B95MBOZGPvr6KQ=="],
@@ -206,23 +208,19 @@
 
     "detect-libc": ["detect-libc@2.1.2", "", {}, "sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ=="],
 
-    "detect-node": ["detect-node@2.1.0", "", {}, "sha512-T0NIuQpnTvFDATNuHN5roPwSBG83rFsuO+MXXH9/3N1eFbn4wcPjttvjMLEPWJ0RGUYgQE7cGgS3tNxbqCGM7g=="],
-
     "env-paths": ["env-paths@2.2.1", "", {}, "sha512-+h1lkLKhZMTYjog1VEpJNG7NZJWcuc2DDk/qsqSTRRCOXiLjeQ1d1/udrUGhqMxUgAlwKNZ0cf2uqan5GLuS2A=="],
 
     "es-define-property": ["es-define-property@1.0.1", "", {}, "sha512-e3nRfgfUZ4rNGL232gUgX06QNyyez04KdjFrF+LTRoOXmrOgFKDg4BCdsjW8EnT69eqdYGmRpJwiPVYNrCaW3g=="],
 
     "es-errors": ["es-errors@1.3.0", "", {}, "sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw=="],
 
-    "es6-error": ["es6-error@4.1.1", "", {}, "sha512-Um/+FxMr9CISWh0bi5Zv0iOD+4cFh5qLeks1qhAopKVAJw3drgKbKySikp7wGhDL0HPeaja0P5ULZrxLkniUVg=="],
-
     "escape-string-regexp": ["escape-string-regexp@4.0.0", "", {}, "sha512-TtpcNJ3XAzx3Gq8sWRzJaVajRs0uVxA2YAkdb1jm2YkPz4G6egUFAyA3n5vtEIZefPk5Wa4UXbKuS5fKkJWdgA=="],
 
     "ffmpeg-static": ["ffmpeg-static@5.3.0", "", { "dependencies": { "@derhuerst/http-basic": "^8.2.0", "env-paths": "^2.2.0", "https-proxy-agent": "^5.0.0", "progress": "^2.0.3" } }, "sha512-H+K6sW6TiIX6VGend0KQwthe+kaceeH/luE8dIZyOP35ik7ahYojDuqlTV1bOrtEwl01sy2HFNGQfi5IDJvotg=="],
 
     "flatbuffers": ["flatbuffers@25.9.23", "", {}, "sha512-MI1qs7Lo4Syw0EOzUl0xjs2lsoeqFku44KpngfIduHBYvzm8h2+7K8YMQh1JtVVVrUvhLpNwqVi4DERegUJhPQ=="],
 
-    "global-agent": ["global-agent@3.0.0", "", { "dependencies": { "boolean": "^3.0.1", "es6-error": "^4.1.1", "matcher": "^3.0.0", "roarr": "^2.15.3", "semver": "^7.3.2", "serialize-error": "^7.0.1" } }, "sha512-PT6XReJ+D07JvGoxQMkT6qji/jVNfX/h364XHZOWeRzy64sSFr+xJ5OX7LI3b4MPQzdL4H8Y8M0xzPpsVMwA8Q=="],
+    "global-agent": ["global-agent@4.1.6", "", { "dependencies": { "globalthis": "^1.0.2", "matcher": "^4.0.0", "semver": "^7.3.5", "serialize-error": "^8.1.0" } }, "sha512-V9u791atI/bS7RryfRTK2oixDWo6/RCrIikjwuQ4kADPRZZml1C6LUJXc7y6qRhaAF8geo3bIvE/siAGJCw38A=="],
 
     "globalthis": ["globalthis@1.0.4", "", { "dependencies": { "define-properties": "^1.2.1", "gopd": "^1.0.1" } }, "sha512-DpLKbNU4WylpxJykQujfCcwYWiV/Jhm50Goo0wrVILAv5jOr9d+H+UR3PhSCD2rCCEIg0uc+G+muBTwD54JhDQ=="],
 
@@ -238,21 +236,19 @@
 
     "inherits": ["inherits@2.0.4", "", {}, "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ=="],
 
-    "json-stringify-safe": ["json-stringify-safe@5.0.1", "", {}, "sha512-ZClg6AaYvamvYEE82d3Iyd3vSSIjQ+odgjaTzRuO3s7toCdFKczob2i0zCh7JE8kWn17yvAWhUVxvqGwUalsRA=="],
-
     "long": ["long@5.3.2", "", {}, "sha512-mNAgZ1GmyNhD7AuqnTG3/VQ26o760+ZYBPKjPvugO8+nLbYfX6TVpJPseBvopbdY+qpZ/lKUnmEc1LeZYS3QAA=="],
 
-    "matcher": ["matcher@3.0.0", "", { "dependencies": { "escape-string-regexp": "^4.0.0" } }, "sha512-OkeDaAZ/bQCxeFAozM55PKcKU0yJMPGifLwV4Qgjitu+5MoAfSQN4lsLJeXZ1b8w0x+/Emda6MZgXS1jvsapng=="],
+    "matcher": ["matcher@4.0.0", "", { "dependencies": { "escape-string-regexp": "^4.0.0" } }, "sha512-S6x5wmcDmsDRRU/c2dkccDwQPXoFczc5+HpQ2lON8pnvHlnvHAHj5WlLVvw6n6vNyHuVugYrFohYxbS+pvFpKQ=="],
 
     "ms": ["ms@2.1.3", "", {}, "sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA=="],
 
     "object-keys": ["object-keys@1.1.1", "", {}, "sha512-NuAESUOUMrlIXOfHKzD6bpPu3tYt3xvjNdRIQ+FeT0lNb4K8WR70CaDxhuNguS2XG+GjkyMwOzsN5ZktImfhLA=="],
 
-    "onnxruntime-common": ["onnxruntime-common@1.24.3", "", {}, "sha512-GeuPZO6U/LBJXvwdaqHbuUmoXiEdeCjWi/EG7Y1HNnDwJYuk6WUbNXpF6luSUY8yASul3cmUlLGrCCL1ZgVXqA=="],
+    "onnxruntime-common": ["onnxruntime-common@1.30.0", "", {}, "sha512-7fdVWjAID1dVhH/G8qK3APARunV4VkBFoCQAP7qp4Wkab0mrorvmc+sqiT+mKXOzDqdjN5j+/Z9nb4gzNPWcyA=="],
 
-    "onnxruntime-node": ["onnxruntime-node@1.24.3", "", { "dependencies": { "adm-zip": "^0.5.16", "global-agent": "^3.0.0", "onnxruntime-common": "1.24.3" }, "os": [ "linux", "win32", "darwin", ] }, "sha512-JH7+czbc8ALA819vlTgcV+Q214/+VjGeBHDjX81+ZCD0PCVCIFGFNtT0V4sXG/1JXypKPgScQcB3ij/hk3YnTg=="],
+    "onnxruntime-node": ["onnxruntime-node@1.30.0", "", { "dependencies": { "adm-zip": "^0.6.0", "global-agent": "^4.1.3", "onnxruntime-common": "1.30.0" }, "os": [ "linux", "win32", "darwin", ] }, "sha512-twhs1C2C/BFkz1yc5OY0KIU2GUq6DURO7hD4bx5Q2Qy3nAMJwRXW8xU3NVczE29VA9lolLOYepoD8fjTGOfIqw=="],
 
-    "onnxruntime-web": ["onnxruntime-web@1.26.0-dev.20260416-b7804b056c", "", { "dependencies": { "flatbuffers": "^25.1.24", "guid-typescript": "^1.0.9", "long": "^5.2.3", "onnxruntime-common": "1.24.0-dev.20251116-b39e144322", "platform": "^1.3.6", "protobufjs": "^7.2.4" } }, "sha512-MD6Ss4GSpQBo6zqoJzyT9LRbKYs7x/JVN23FT24EcEvlqF4VuzPOeH6X38orZPKHQDbprn7K+SBpu0/mj2CQiw=="],
+    "onnxruntime-web": ["onnxruntime-web@1.31.0-dev.20260914-8d85527a0", "", { "dependencies": { "flatbuffers": "^25.1.24", "guid-typescript": "^1.0.9", "long": "^5.2.3", "onnxruntime-common": "1.31.0-dev.20260911-2a43ec07e", "platform": "^1.3.6", "protobufjs": "^7.2.4" } }, "sha512-Iy7rtadoBgxS/LLvDr3QW38DB1PNXRnr0GJMcL0TAt7c9qjgVQl83UlGCVyeAnK2InpmW8Uc3PL8XIuqtDeF6g=="],
 
     "parse-cache-control": ["parse-cache-control@1.0.1", "", {}, "sha512-60zvsJReQPX5/QP0Kzfd/VrpjScIQ7SHBW6bFCYfEP+fp0Eppr1SHhIO5nd1PjZtvclzSzES9D/p5nFJurwfWg=="],
 
@@ -276,27 +272,21 @@
 
     "readable-stream": ["readable-stream@3.6.2", "", { "dependencies": { "inherits": "^2.0.3", "string_decoder": "^1.1.1", "util-deprecate": "^1.0.1" } }, "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA=="],
 
-    "roarr": ["roarr@2.15.4", "", { "dependencies": { "boolean": "^3.0.1", "detect-node": "^2.0.4", "globalthis": "^1.0.1", "json-stringify-safe": "^5.0.1", "semver-compare": "^1.0.0", "sprintf-js": "^1.1.2" } }, "sha512-CHhPh+UNHD2GTXNYhPWLnU8ONHdI+5DI+4EYIAOaiD63rHeYlZvyh8P+in5999TTSFgUYuKUAjzRI4mdh/p+2A=="],
-
     "safe-buffer": ["safe-buffer@5.2.1", "", {}, "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ=="],
 
     "scheduler": ["scheduler@0.27.0", "", {}, "sha512-eNv+WrVbKu1f3vbYJT/xtiF5syA5HPIMtf9IgY/nKg0sWqzAUEvqY/xm7OcZc/qafLx/iO9FgOmeSAp4v5ti/Q=="],
 
     "semver": ["semver@7.8.5", "", { "bin": { "semver": "bin/semver.js" } }, "sha512-Y7/KDsb8LjooZpwaqGyulO6DQlksgCncchHGk+sZIY4SBvUocMBEFH5Ur1fI4dV+Jvl0w6cjvucaIi40puRioA=="],
 
-    "semver-compare": ["semver-compare@1.0.0", "", {}, "sha512-YM3/ITh2MJ5MtzaM429anh+x2jiLVjqILF4m4oyQB18W7Ggea7BfqdH/wGMK7dDiMghv/6WG7znWMwUDzJiXow=="],
+    "serialize-error": ["serialize-error@8.1.0", "", { "dependencies": { "type-fest": "^0.20.2" } }, "sha512-3NnuWfM6vBYoy5gZFvHiYsVbafvI9vZv/+jlIigFn4oP4zjNPK3LhcY0xSCgeb1a5L8jO71Mit9LlNoi2UfDDQ=="],
 
-    "serialize-error": ["serialize-error@7.0.1", "", { "dependencies": { "type-fest": "^0.13.1" } }, "sha512-8I8TjW5KMOKsZQTvoxjuSIa7foAwPWGOts+6o7sgjz41/qMD9VQHEDxi6PBvK2l0MXUmqZyNpUK+T2tQaaElvw=="],
-
-    "sharp": ["sharp@0.34.5", "", { "dependencies": { "@img/colour": "^1.0.0", "detect-libc": "^2.1.2", "semver": "^7.7.3" }, "optionalDependencies": { "@img/sharp-darwin-arm64": "0.34.5", "@img/sharp-darwin-x64": "0.34.5", "@img/sharp-libvips-darwin-arm64": "1.2.4", "@img/sharp-libvips-darwin-x64": "1.2.4", "@img/sharp-libvips-linux-arm": "1.2.4", "@img/sharp-libvips-linux-arm64": "1.2.4", "@img/sharp-libvips-linux-ppc64": "1.2.4", "@img/sharp-libvips-linux-riscv64": "1.2.4", "@img/sharp-libvips-linux-s390x": "1.2.4", "@img/sharp-libvips-linux-x64": "1.2.4", "@img/sharp-libvips-linuxmusl-arm64": "1.2.4", "@img/sharp-libvips-linuxmusl-x64": "1.2.4", "@img/sharp-linux-arm": "0.34.5", "@img/sharp-linux-arm64": "0.34.5", "@img/sharp-linux-ppc64": "0.34.5", "@img/sharp-linux-riscv64": "0.34.5", "@img/sharp-linux-s390x": "0.34.5", "@img/sharp-linux-x64": "0.34.5", "@img/sharp-linuxmusl-arm64": "0.34.5", "@img/sharp-linuxmusl-x64": "0.34.5", "@img/sharp-wasm32": "0.34.5", "@img/sharp-win32-arm64": "0.34.5", "@img/sharp-win32-ia32": "0.34.5", "@img/sharp-win32-x64": "0.34.5" } }, "sha512-Ou9I5Ft9WNcCbXrU9cMgPBcCK8LiwLqcbywW3t4oDV37n1pzpuNLsYiAV8eODnjbtQlSDwZ2cUEeQz4E54Hltg=="],
-
-    "sprintf-js": ["sprintf-js@1.1.3", "", {}, "sha512-Oo+0REFV59/rz3gfJNKQiBlwfHaSESl1pcGyABQsnnIfWOFt6JNj5gCog2U6MLZ//IGYD+nA8nI+mTShREReaA=="],
+    "sharp": ["sharp@0.35.5", "", { "dependencies": { "@img/colour": "^1.1.0", "detect-libc": "^2.1.2", "semver": "^7.8.5" }, "optionalDependencies": { "@img/sharp-darwin-arm64": "0.35.5", "@img/sharp-darwin-x64": "0.35.5", "@img/sharp-freebsd-wasm32": "0.35.5", "@img/sharp-libvips-darwin-arm64": "1.3.4", "@img/sharp-libvips-darwin-x64": "1.3.4", "@img/sharp-libvips-linux-arm": "1.3.4", "@img/sharp-libvips-linux-arm64": "1.3.4", "@img/sharp-libvips-linux-ppc64": "1.3.4", "@img/sharp-libvips-linux-riscv64": "1.3.4", "@img/sharp-libvips-linux-s390x": "1.3.4", "@img/sharp-libvips-linux-x64": "1.3.4", "@img/sharp-libvips-linuxmusl-arm64": "1.3.4", "@img/sharp-libvips-linuxmusl-x64": "1.3.4", "@img/sharp-linux-arm": "0.35.5", "@img/sharp-linux-arm64": "0.35.5", "@img/sharp-linux-ppc64": "0.35.5", "@img/sharp-linux-riscv64": "0.35.5", "@img/sharp-linux-s390x": "0.35.5", "@img/sharp-linux-x64": "0.35.5", "@img/sharp-linuxmusl-arm64": "0.35.5", "@img/sharp-linuxmusl-x64": "0.35.5", "@img/sharp-webcontainers-wasm32": "0.35.5", "@img/sharp-win32-arm64": "0.35.5", "@img/sharp-win32-ia32": "0.35.5", "@img/sharp-win32-x64": "0.35.5" }, "peerDependencies": { "@types/node": "*" }, "optionalPeers": ["@types/node"] }, "sha512-Ywn4OnzGukp7CDMrp08RQ50YKmuwG47brZgIVPTvBaaAfQlRlygrRqSrxdCiL9M+LlzLBiJ68IR1QqvzHyjC7g=="],
 
     "string_decoder": ["string_decoder@1.3.0", "", { "dependencies": { "safe-buffer": "~5.2.0" } }, "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA=="],
 
     "tslib": ["tslib@2.8.1", "", {}, "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w=="],
 
-    "type-fest": ["type-fest@0.13.1", "", {}, "sha512-34R7HTnG0XIJcBSn5XhDd7nNFPRcXYRZrBB2O2jdKqYODldSzBAqzsWoZYYvduky73toYS/ESqxPvkDf/F0XMg=="],
+    "type-fest": ["type-fest@0.20.2", "", {}, "sha512-Ne+eE4r0/iWnpAxD852z3A+N0Bt5RN//NjJwRd2VFHEmrywxf5vsZlh4R6lixl6B+wz/8d+maTSAkN1FIkI3LQ=="],
 
     "typedarray": ["typedarray@0.0.6", "", {}, "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA=="],
 
@@ -310,6 +300,6 @@
 
     "http-response-object/@types/node": ["@types/node@10.17.60", "", {}, "sha512-F0KIgDJfy2nA3zMLmWGKxcH2ZVEtCZXHHdOQs2gSaQ27+lNeEfGxzkIw90aXswATX7AZ33tahPbzy6KAfUreVw=="],
 
-    "onnxruntime-web/onnxruntime-common": ["onnxruntime-common@1.24.0-dev.20251116-b39e144322", "", {}, "sha512-BOoomdHYmNRL5r4iQ4bMvsl2t0/hzVQ3OM3PHD0gxeXu1PmggqBv3puZicEUVOA3AtHHYmqZtjMj9FOfGrATTw=="],
+    "onnxruntime-web/onnxruntime-common": ["onnxruntime-common@1.31.0-dev.20260911-2a43ec07e", "", {}, "sha512-gBuF6U32YErKIAt+yD7DeGBpjRxhJ1uJwako6ygjokSZULDU6Pd+KWComX8Tumk1hYVHRxjPj7mdMnD0ryAPOw=="],
   }
 }
diff --git a/docs/Decisions.md b/docs/Decisions.md
index 5dc8f08..9008a54 100644
--- a/docs/Decisions.md
+++ b/docs/Decisions.md
@@ -1224,3 +1224,31 @@ whole-file output is equally bad, which is exactly what the absolute bar
 exists to catch.
 **Consequence:** full `bun test` ≈ 19 min on CPU (en_alien ≈ 20 min of it
 on a cold run); the fast suite excludes this file.
+
+## D-WS1a — Transformers.js 4.2.0 → 4.3.2, sequential-session patch carried over
+**Status:** Accepted (2026-10-29, spec 001 Goal 1)
+`@huggingface/transformers` is now pinned to exactly `4.3.2` (latest; 4.3.0
+added Safari 26+ WebGPU). It brings onnxruntime-web
+`1.31.0-dev.20260914-8d85527a0` (was `1.26.0-dev.20260416`) and
+onnxruntime-node `1.30.0` (was `1.24.3`).
+**Patch.** Upstream `constructSessions` (`dist/transformers.web.js`) is
+still the bare `Promise.all` over sub-model sessions, so D-027/D-028's
+`options.sequentialSessionLoad` branch is still needed. Regenerated with
+`bun patch` as `patches/@huggingface%2Ftransformers@4.3.2.patch` (the same
+hunk, byte-identical apart from line offsets); the 4.2.0 patch is deleted.
+The version is pinned exactly (no caret) because the patch is keyed by
+version: a caret range would let a fresh lockfile resolve a version the
+patch does not apply to.
+**Guard.** `tests/transformers-runtime.test.ts` (fast suite) fails if the
+installed version, the `patchedDependencies` key, or the patched
+`constructSessions` body drift apart — a lost patch would otherwise only
+show up as mobile tab crashes.
+**Unchanged by the bump:** onnxruntime-web's WebGPU bundle still loads the
+`ort-wasm-simd-threaded.asyncify.{mjs,wasm}` pair (same as 1.26), and
+`scripts/build.ts` / `/ort/` already copy every `ort-wasm-*` file.
+**Parakeet (for spec 001 Goal 7):** 4.3.2 supports only the CTC variant —
+`ParakeetForCTC` (`model_type: "parakeet_ctc"`, routed through the ASR
+pipeline's wav2vec2/CTC path) plus `ParakeetFeatureExtractor`. There is no
+TDT/RNN-T (transducer) decoder or joint-network loop anywhere in the
+package, so **Parakeet TDT 0.6B v3 is not supported natively**; per the
+spec, that path uses `parakeet.js`.
diff --git a/docs/WorkBreakdown.md b/docs/WorkBreakdown.md
index 336b0b4..d69541b 100644
--- a/docs/WorkBreakdown.md
+++ b/docs/WorkBreakdown.md
@@ -339,6 +339,10 @@ cached.
       `language`/`task` the same way the HTTP route does, and
       `tests/server-live.test.ts` covers the bridge against a fake sidecar.
 
+## M8 — Transcription quality and speed (spec 001)
+- [x] Transformers.js 4.2.0 → 4.3.2, sequential-session patch regenerated
+      for 4.3.2 and guarded by `tests/transformers-runtime.test.ts` (D-WS1a).
+
 ---
 
 ## Deliberately out of scope (for now)
diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
index 851c621..978a5fa 100644
--- a/docs/plans/001-1-transformers-upgrade.md
+++ b/docs/plans/001-1-transformers-upgrade.md
@@ -57,7 +57,7 @@ onnxruntime-node 1.30.0), bun:test.
 **Interfaces:**
 - Produces: `tests/transformers-runtime.test.ts` (Task 2 adds a case to it).
 
-- [ ] **Step 1: Write the failing test** `describe("@huggingface/transformers runtime")`:
+- [x] **Step 1: Write the failing test** `describe("@huggingface/transformers runtime")`:
   - `"installed version is the pinned 4.3.2"` — `node_modules/@huggingface/transformers/package.json`
     `.version === "4.3.2"`.
   - `"patchedDependencies points at an existing patch for the installed version"` — root
@@ -65,15 +65,15 @@ onnxruntime-node 1.30.0), bun:test.
   - `"web bundle's constructSessions carries the sequential-load patch (D-027/D-028)"` — the
     `constructSessions` function text sliced from `dist/transformers.web.js` contains
     `options?.sequentialSessionLoad` and both `Promise.all(` and `for (const name of Object.keys(names))`.
-- [ ] **Step 2: Run** `bun test tests/transformers-runtime.test.ts` → FAIL on version (4.2.0) and key.
-- [ ] **Step 3:** `bun add -d @huggingface/transformers@4.3.2` (remove the 4.2.0
+- [x] **Step 2: Run** `bun test tests/transformers-runtime.test.ts` → FAIL on version (4.2.0) and key.
+- [x] **Step 3:** `bun add -d @huggingface/transformers@4.3.2` (remove the 4.2.0
   `patchedDependencies` entry first if bun refuses), `bun patch @huggingface/transformers`, re-apply
   the 4.2.0 hunk to `constructSessions` in `dist/transformers.web.js` (upstream is unchanged:
   still a bare `Promise.all`), `bun patch --commit node_modules/@huggingface/transformers`.
   `git rm` the 4.2.0 patch. Re-link the shared `.cache` symlink if the reinstall removed it.
-- [ ] **Step 4: Run** the test → PASS; `bun install --frozen-lockfile` clean; typecheck; fast
+- [x] **Step 4: Run** the test → PASS; `bun install --frozen-lockfile` clean; typecheck; fast
   suite; `bun run build`; `ls dist/ort` shows the files ort-web 1.31 requests.
-- [ ] **Step 5:** docs: AGENTS.md patch filename; `D-WS1a` (upgrade, patch carried, why upstream
+- [x] **Step 5:** docs: AGENTS.md patch filename; `D-WS1a` (upgrade, patch carried, why upstream
   doesn't obsolete it, ort versions, Parakeet = CTC only); WorkBreakdown tick. Commit
   "Upgrade @huggingface/transformers to 4.3.2 and carry the sequential-session patch".
 
diff --git a/package.json b/package.json
index 7389e07..70d464e 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
   },
   "devDependencies": {
     "@fontsource-variable/inter": "^5.3.0",
-    "@huggingface/transformers": "^4.2.0",
+    "@huggingface/transformers": "4.3.2",
     "@types/bun": "latest",
     "@types/passport": "^1.0.17",
     "@types/passport-local": "^1.0.38",
@@ -31,6 +31,6 @@
     "ffmpeg-static"
   ],
   "patchedDependencies": {
-    "@huggingface/transformers@4.2.0": "patches/@huggingface%2Ftransformers@4.2.0.patch"
+    "@huggingface/transformers@4.3.2": "patches/@huggingface%2Ftransformers@4.3.2.patch"
   }
 }
diff --git a/patches/@huggingface%2Ftransformers@4.2.0.patch b/patches/@huggingface%2Ftransformers@4.3.2.patch
similarity index 88%
rename from patches/@huggingface%2Ftransformers@4.2.0.patch
rename to patches/@huggingface%2Ftransformers@4.3.2.patch
index e26c9ff..7937bef 100644
--- a/patches/@huggingface%2Ftransformers@4.2.0.patch
+++ b/patches/@huggingface%2Ftransformers@4.3.2.patch
@@ -1,11 +1,8 @@
-diff --git a/node_modules/@huggingface/transformers/.bun-tag-8719566ebeed846f b/.bun-tag-8719566ebeed846f
-new file mode 100644
-index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
 diff --git a/dist/transformers.web.js b/dist/transformers.web.js
-index bb7b32717a42475a5f66411a33d5e5964dfda3e2..03de63967e99f8f3c847858621d72577ef037391 100644
+index a86f15e936b5b03d960037ed3e82a175dd5a0ffb..d74ef622704370b0235a628cfa5746b06fcc620e 100644
 --- a/dist/transformers.web.js
 +++ b/dist/transformers.web.js
-@@ -18558,22 +18558,49 @@ async function getSession(pretrained_model_name_or_path, fileName, options, cach
+@@ -19840,22 +19840,49 @@ async function getSession(pretrained_model_name_or_path, fileName, options, cach
    return { buffer_or_path, session_options, session_config };
  }
  async function constructSessions(pretrained_model_name_or_path, names, options, cache_sessions = void 0) {
diff --git a/tests/transformers-runtime.test.ts b/tests/transformers-runtime.test.ts
new file mode 100644
index 0000000..73babd5
--- /dev/null
+++ b/tests/transformers-runtime.test.ts
@@ -0,0 +1,50 @@
+import { describe, expect, test } from "bun:test";
+import { existsSync, readFileSync } from "node:fs";
+import { join } from "node:path";
+
+/**
+ * Tripwires for the patched, pinned Transformers.js runtime (D-WS1a).
+ * `@huggingface/transformers` carries a `bun patch` (D-027/D-028) keyed by
+ * its exact version; a bump that forgets to regenerate the patch would leave
+ * the app working but silently bring back the mobile OOM. These checks fail
+ * the fast suite instead.
+ */
+
+const ROOT = join(import.meta.dir, "..");
+const PKG_DIR = join(ROOT, "node_modules/@huggingface/transformers");
+const PINNED_VERSION = "4.3.2";
+
+function read(path: string): string {
+  return readFileSync(path, "utf8");
+}
+
+/** Source text of `async function <name>(…) { … }` in a bundled file. */
+function functionSource(source: string, name: string): string {
+  const start = source.indexOf(`async function ${name}(`);
+  if (start < 0) throw new Error(`${name} not found`);
+  const end = source.indexOf("\nfunction ", start + 1);
+  const endAsync = source.indexOf("\nasync function ", start + 1);
+  const stops = [end, endAsync].filter((i) => i > 0);
+  return source.slice(start, stops.length ? Math.min(...stops) : undefined);
+}
+
+describe("@huggingface/transformers runtime", () => {
+  test("installed version is the pinned 4.3.2", () => {
+    const installed = JSON.parse(read(join(PKG_DIR, "package.json"))).version;
+    expect(installed).toBe(PINNED_VERSION);
+  });
+
+  test("patchedDependencies points at an existing patch for the installed version", () => {
+    const rootPkg = JSON.parse(read(join(ROOT, "package.json")));
+    const patchPath = rootPkg.patchedDependencies?.[`@huggingface/transformers@${PINNED_VERSION}`];
+    expect(typeof patchPath).toBe("string");
+    expect(existsSync(join(ROOT, patchPath))).toBe(true);
+  });
+
+  test("web bundle's constructSessions carries the sequential-load patch (D-027/D-028)", () => {
+    const body = functionSource(read(join(PKG_DIR, "dist/transformers.web.js")), "constructSessions");
+    expect(body).toContain("options?.sequentialSessionLoad");
+    expect(body).toContain("Promise.all(");
+    expect(body).toContain("for (const name of Object.keys(names))");
+  });
+});

From cd9aa48b838c5c6216ccf35a5b99ed7b03130435 Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Thu, 29 Oct 2026 22:30:29 +0100
Subject: [PATCH 3/6] Record what the Transformers.js 4.3.2 upgrade changes on
 the WebGPU side and what needs a browser check

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/Decisions.md                        | 40 ++++++++++++++++++++++++
 docs/plans/001-1-transformers-upgrade.md |  4 +--
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/docs/Decisions.md b/docs/Decisions.md
index 9008a54..5aa8acb 100644
--- a/docs/Decisions.md
+++ b/docs/Decisions.md
@@ -1252,3 +1252,43 @@ pipeline's wav2vec2/CTC path) plus `ParakeetFeatureExtractor`. There is no
 TDT/RNN-T (transducer) decoder or joint-network loop anywhere in the
 package, so **Parakeet TDT 0.6B v3 is not supported natively**; per the
 spec, that path uses `parakeet.js`.
+
+## D-WS1d — WebGPU-side effects of the 4.3.2 upgrade: inspected, not measured (needs the owner's browser check)
+**Status:** Open — inspection only (2026-10-29)
+This machine has no GPU and no browser WebGPU, so D-022, D-025 and D-026
+cannot be re-measured here. What the upgrade changes on that side, from the
+4.3.0–4.3.2 release notes and a 4.2.0↔4.3.2 source diff:
+- **onnxruntime-web 1.26.0-dev.20260416 → 1.31.0-dev.20260914.** Five minor
+  versions of WebGPU EP work land at once. The WebGPU bundle still uses the
+  same `ort-wasm-simd-threaded.asyncify` binary pair (now 26.9 MB, was
+  23.6 MB — a one-time re-download, evicted correctly because the SW cache
+  version hashes the worker bundle, which embeds the ort version). The JS
+  layer still has no Firefox/Gecko or Safari special-casing, and still
+  checks `shader-f16` / `isFallbackAdapter` as before.
+- **Safari 26+ WebGPU (Transformers.js 4.3.0, PR 1700).** The upstream change
+  only alters which binary Transformers.js picks for its jsDelivr default
+  (`IS_SAFARI` → `IS_SAFARI_BELOW_26`). This app overrides `wasmPaths` with
+  `./ort/`, so it never used that default; whether WebGPU is attempted on
+  Safari is decided by the worker's own probe (`navigator.gpu`, D-017/D-025),
+  unchanged.
+- **Whisper / ASR pipeline / streamers:** no functional change (comment
+  edits, `processor.batch_decode` → `tokenizer.batch_decode` on a
+  non-Whisper path, one `transpose` → `permute` rename). "Fix Whisper
+  progress callbacks" and "fix duplicate model file downloads when
+  `progress_callback` is active" (4.3.0) are in the file-loading path:
+  download progress may look different, and a duplicate fetch is avoided.
+- **Session/dtype selection (`session.js`, `dtypes.js`):** unchanged apart
+  from no longer exporting two constants.
+**Needs the owner's browser check** (decisions stay as they are until then):
+1. **Large v3 Turbo on WebGPU (the owner's setup):** load and transcribe
+   `tests/audio_files/en_aiproblem.m4a`; compare wall-clock with the 4.2.0
+   build and confirm the text is sane (fp16 encoder + q4 decoder, D-022
+   scope note).
+2. **D-026:** Firefox with Backend = WebGPU explicitly selected — still far
+   slower than WASM? If it is now at parity, drop the Firefox UA check.
+3. **D-022:** medium stays q4 on WebGPU/WebNN. A retest of the fp16
+   conversions is only worth doing if the owner wants medium faster on GPU.
+4. **D-025:** Firefox "auto" lands on multithreaded WASM (footer shows
+   "WASM (on-device, N threads)" with N > 1).
+5. **Safari 26 (macOS/iOS):** what the footer reports for "auto"; if WebGPU,
+   check speed and output.
diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
index 978a5fa..25d5424 100644
--- a/docs/plans/001-1-transformers-upgrade.md
+++ b/docs/plans/001-1-transformers-upgrade.md
@@ -109,9 +109,9 @@ onnxruntime-node 1.30.0), bun:test.
 
 ### Task 4: WebGPU-affecting changes (D-022, D-025/D-026) — inspection only
 
-- [ ] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
+- [x] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
   WebGPU/fp16/Firefox/Safari changes; check ort-web 1.31 dist for Gecko/fp16 handling.
-- [ ] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
+- [x] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
   (explicit WebGPU on Firefox for D-026; medium fp16 for D-022; Safari 26 WebGPU). No code change.
   Commit.
 

From 9f1d58c0b7da036bcc3606a5183bbaaac42e4707 Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Thu, 29 Oct 2026 22:59:35 +0100
Subject: [PATCH 4/6] Keep max_new_tokens: 440 on Transformers.js 4.3.2 and pin
 the seek-loop condition it avoids

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/Decisions.md                        | 27 ++++++++++++++++++++++++
 docs/plans/001-1-transformers-upgrade.md |  6 +++---
 src/worker/inference.worker.ts           |  7 +++---
 tests/transformers-runtime.test.ts       |  7 ++++++
 4 files changed, 41 insertions(+), 6 deletions(-)

diff --git a/docs/Decisions.md b/docs/Decisions.md
index 5aa8acb..eab0ebb 100644
--- a/docs/Decisions.md
+++ b/docs/Decisions.md
@@ -1292,3 +1292,30 @@ cannot be re-measured here. What the upgrade changes on that side, from the
    "WASM (on-device, N threads)" with N > 1).
 5. **Safari 26 (macOS/iOS):** what the footer reports for "auto"; if WebGPU,
    check speed and output.
+
+## D-WS1b — D-021's `max_new_tokens: 440` is still needed on Transformers.js 4.3.2
+**Status:** Accepted (2026-10-29) — re-test of D-021 part 3, which stands unchanged
+**Source:** 4.3.2's `WhisperForConditionalGeneration.generate()` still takes
+the seek loop on exactly D-021's condition,
+`generation_config.return_timestamps && !kwargs.max_new_tokens`
+(`src/models/whisper/modeling_whisper.js`); `_generate_with_seek` is
+unchanged. `tests/transformers-runtime.test.ts` now pins that line, so a
+future bump that changes it fails the fast suite and prompts a re-measure.
+**Measured** (tiny.en q8 — the catalog WASM default — on onnxruntime-node,
+CPU, 16-core shared machine, same harness for both versions; pipeline options
+as the worker: 30 s chunks, 5 s stride, `return_timestamps`; 888 s
+`en_alien.opus`, 44 windows):
+
+| Transformers.js | `max_new_tokens` | generate passes | wall-clock | WER |
+|---|---|---|---|---|
+| 4.2.0 | 440 | 44 | 54.7 s | 0.315 |
+| 4.2.0 | unset (seek loop) | 83 | 66.6 s | 0.447 |
+| 4.3.2 | 440 | 44 | 55.5 s | 0.315 |
+| 4.3.2 | unset (seek loop) | 84 | 119.7 s | 0.449 |
+
+Pass counts and WER are deterministic and reproduce D-021 (80 passes,
+0.447 vs 0.315); wall-clock is noisy here (other workstreams' light jobs
+share the CPU), so read it only as "the seek loop is slower", not as a
+version-to-version speed comparison.
+**Decision:** keep `max_new_tokens: 440` in `src/worker/inference.worker.ts`
+and in `tests/live-real-model.test.ts`.
diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
index 25d5424..0c623bf 100644
--- a/docs/plans/001-1-transformers-upgrade.md
+++ b/docs/plans/001-1-transformers-upgrade.md
@@ -82,16 +82,16 @@ onnxruntime-node 1.30.0), bun:test.
 **Files:** Modify `tests/transformers-runtime.test.ts`, `docs/Decisions.md`,
 `src/worker/inference.worker.ts` (comment only: "4.2" → "4.2–4.3", cite D-WS1b).
 
-- [ ] **Step 1: Test** `"Whisper generate still takes the seek loop when max_new_tokens is unset (D-021)"`
+- [x] **Step 1: Test** `"Whisper generate still takes the seek loop when max_new_tokens is unset (D-021)"`
   — `src/models/whisper/modeling_whisper.js` contains
   `if (generation_config.return_timestamps && !kwargs.max_new_tokens)`. Run → PASS expected
   (tripwire; it encodes the revisit condition, verified against the 4.3.2 source).
-- [ ] **Step 2: Measure** (`/tmp/ws1/d021.ts`, onnxruntime-node, under the lock): tiny.en q8 on
+- [x] **Step 2: Measure** (`/tmp/ws1/d021.ts`, onnxruntime-node, under the lock): tiny.en q8 on
   `en_alien.opus` (ffmpeg-static → 16 kHz f32), pipeline options as the worker
   (`chunk_length_s 30, stride_length_s 5, return_timestamps true`), with and without
   `max_new_tokens: 440`; record wall-clock, generate-pass count (wrap `model.generate`), window
   count, WER vs `en_alien.txt` (`tests/dsp.ts` `wordErrorRate`).
-- [ ] **Step 3:** `D-WS1b` with the numbers; keep `max_new_tokens: 440` unless the seek path is now
+- [x] **Step 3:** `D-WS1b` with the numbers; keep `max_new_tokens: 440` unless the seek path is now
   both faster and not worse on WER. Commit.
 
 ### Task 3: D-014 re-test (WASM graphOptimizationLevel)
diff --git a/src/worker/inference.worker.ts b/src/worker/inference.worker.ts
index 2d5b4b2..bd3e656 100644
--- a/src/worker/inference.worker.ts
+++ b/src/worker/inference.worker.ts
@@ -348,9 +348,10 @@ async function transcribe(message: TranscribeMessage): Promise<void> {
     stride_length_s: STRIDE_LENGTH_S,
     return_timestamps: true,
     // With return_timestamps and no explicit max_new_tokens, Transformers.js
-    // 4.2's Whisper generate() takes a seek-loop path that re-decodes each
-    // window's tail (1–3 generate passes per window). Under this pipeline's
-    // own 30 s/5 s chunking that is pure overhead: ~1.4× slower on long
+    // 4.2–4.3 Whisper generate() takes a seek-loop path (D-021; re-measured
+    // on 4.3.2, D-WS1b) that re-decodes each window's tail (1–3 generate
+    // passes per window). Under this pipeline's own 30 s/5 s chunking that
+    // is pure overhead: ~1.4× slower on long
     // files, duplicated boundary text, on_finalize firing once per pass
     // (breaking TranscribeProgressTracker's one-finalize-per-window
     // assumption — the progress bar saturated early, then looked frozen),
diff --git a/tests/transformers-runtime.test.ts b/tests/transformers-runtime.test.ts
index 73babd5..b790df7 100644
--- a/tests/transformers-runtime.test.ts
+++ b/tests/transformers-runtime.test.ts
@@ -47,4 +47,11 @@ describe("@huggingface/transformers runtime", () => {
     expect(body).toContain("Promise.all(");
     expect(body).toContain("for (const name of Object.keys(names))");
   });
+
+  test("Whisper generate still takes the seek loop when max_new_tokens is unset (D-021, D-WS1b)", () => {
+    // The worker's `max_new_tokens: 440` exists only to dodge this branch.
+    // If upstream changes the condition, re-measure D-021 before touching it.
+    const source = read(join(PKG_DIR, "src/models/whisper/modeling_whisper.js"));
+    expect(source).toContain("if (generation_config.return_timestamps && !kwargs.max_new_tokens)");
+  });
 });

From cc8e031d6b859994b2996d4d59379d9fa1fa33a3 Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Fri, 30 Oct 2026 00:45:46 +0100
Subject: [PATCH 5/6] Run WASM sessions at the default graph optimization level
 now that ort-web 1.31 loads the 8-bit decoders

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/Decisions.md                        | 43 +++++++++++++++++++++++-
 docs/WorkBreakdown.md                    |  2 ++
 docs/plans/001-1-transformers-upgrade.md |  4 +--
 src/worker/inference.worker.ts           | 14 ++++----
 tests/offline.md                         |  5 +++
 tests/transformers-runtime.test.ts       | 13 +++++++
 6 files changed, 70 insertions(+), 11 deletions(-)

diff --git a/docs/Decisions.md b/docs/Decisions.md
index eab0ebb..a124be5 100644
--- a/docs/Decisions.md
+++ b/docs/Decisions.md
@@ -125,7 +125,8 @@ than ONNX Runtime under Bun; the server engine becomes genuinely useful rather t
 slow convenience.
 
 ## D-014 — WASM sessions run at graphOptimizationLevel "basic"
-**Status:** Accepted (bug workaround, 2026-07-10)
+**Status:** **Superseded by D-WS1c** (bug workaround, 2026-07-10; the ort-web
+build in Transformers.js 4.3.2 no longer has the bug, so the cap is gone)
 On the WASM backend, the inference worker passes
 `session_options: { graphOptimizationLevel: "basic" }` to the Transformers.js
 pipeline. The onnxruntime-web build bundled with Transformers.js 4.2
@@ -1319,3 +1320,43 @@ share the CPU), so read it only as "the seek loop is slower", not as a
 version-to-version speed comparison.
 **Decision:** keep `max_new_tokens: 440` in `src/worker/inference.worker.ts`
 and in `tests/live-real-model.test.ts`.
+
+## D-WS1c — WASM sessions back at the default graph optimization level (D-014's "basic" cap dropped)
+**Status:** Accepted (2026-10-30) — supersedes D-014
+**Re-test** of D-014's revisit condition after the Transformers.js 4.3.2 bump
+(D-WS1a), which brings onnxruntime-web `1.31.0-dev.20260914-8d85527a0`.
+Measured under Bun with onnxruntime-web's own wasm EP (not onnxruntime-node),
+1 thread, AMD Ryzen 9 9950X shared with other workstreams.
+1. **Session creation**, `onnx-community/whisper-tiny`
+   `decoder_model_merged_quantized.onnx` (D-014's repro file), every level:
+
+   | onnxruntime-web | disabled | basic | extended | all |
+   |---|---|---|---|---|
+   | 1.26.0-dev.20260416 (control) | OK | OK | FAIL | FAIL |
+   | 1.31.0-dev.20260914 | OK | OK | OK | OK |
+
+   The control still fails with D-014's exact error (`qdq_actions.cc:137
+   TransposeDQWeightsForMatMulNBits Missing required scale:
+   model.decoder.embed_tokens.weight_merged_0_scale`); 1.31 loads at all four.
+2. **Transcription**, Transformers.js 4.3.2 pipeline on that ort-web build,
+   `whisper-tiny.en` q8 (catalog WASM default), `en_aiproblem` (14.4 s),
+   worker options (30 s chunks, 5 s stride, timestamps, `max_new_tokens:
+   440`). Both pipelines in one process, 1 warm-up each, then 8 interleaved
+   runs (A/B order alternating) so machine-load drift hits both equally:
+
+   | level | warm runs (s) | median | WER | text |
+   |---|---|---|---|---|
+   | `basic` (D-014) | 1.49 1.44 1.36 1.39 1.41 1.47 1.48 1.60 | 1.47 s | 0.000 | identical |
+   | default (`all`) | 1.38 1.47 1.34 1.39 1.37 1.42 1.43 1.43 | 1.42 s | 0.000 | identical |
+
+   Same transcript byte-for-byte at both levels and across every run; the
+   default level is ~3 % faster here (within noise; certainly not slower).
+**Decision:** `src/worker/inference.worker.ts` no longer passes
+`session_options` — WASM and WebGPU both use onnxruntime's default level.
+`tests/transformers-runtime.test.ts` pins the onnxruntime-web version this
+was measured on and that the worker sets no `graphOptimizationLevel`; a
+different ort-web build fails the fast suite until this session-creation
+check is re-run.
+**Not covered here:** a real browser's ort-web wasm build (the same
+`ort-wasm-simd-threaded.*` files, but multithreaded under COOP/COEP) —
+`tests/offline.md` §2's WASM step is the owner's browser check.
diff --git a/docs/WorkBreakdown.md b/docs/WorkBreakdown.md
index d69541b..cb1963f 100644
--- a/docs/WorkBreakdown.md
+++ b/docs/WorkBreakdown.md
@@ -342,6 +342,8 @@ cached.
 ## M8 — Transcription quality and speed (spec 001)
 - [x] Transformers.js 4.2.0 → 4.3.2, sequential-session patch regenerated
       for 4.3.2 and guarded by `tests/transformers-runtime.test.ts` (D-WS1a).
+- [x] WASM sessions back at the default graph optimization level: ort-web
+      1.31.0-dev loads the q8 decoders at every level (D-WS1c supersedes D-014).
 
 ---
 
diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
index 0c623bf..998bbf9 100644
--- a/docs/plans/001-1-transformers-upgrade.md
+++ b/docs/plans/001-1-transformers-upgrade.md
@@ -98,12 +98,12 @@ onnxruntime-node 1.30.0), bun:test.
 
 **Files:** `docs/Decisions.md`; `src/worker/inference.worker.ts` only if the outcome is "drop".
 
-- [ ] **Step 1: Measure** (`/tmp/ws1/d014.ts`): `globalThis[Symbol.for("onnxruntime")] =
+- [x] **Step 1: Measure** (`/tmp/ws1/d014.ts`): `globalThis[Symbol.for("onnxruntime")] =
   await import("onnxruntime-web")` before importing transformers, wasm EP, 1 thread; for
   `onnx-community/whisper-tiny` `decoder_model_merged_quantized.onnx` create a session at
   `disabled/basic/extended/all`; record success/error. If all load: transcribe `en_aiproblem` with
   tiny.en q8 at `basic` vs default (`all`), 3 warm runs each, wall-clock + text identity.
-- [ ] **Step 2:** If default fails → keep, `D-WS1c` "still needed on ort-web 1.31.0-dev". If it
+- [x] **Step 2:** If default fails → keep, `D-WS1c` "still needed on ort-web 1.31.0-dev". If it
   loads and is not slower → remove the override (worker comment cites D-WS1c), run a q8 transcribe
   again through the harness with the worker's new options. Commit.
 
diff --git a/src/worker/inference.worker.ts b/src/worker/inference.worker.ts
index bd3e656..79c2492 100644
--- a/src/worker/inference.worker.ts
+++ b/src/worker/inference.worker.ts
@@ -260,14 +260,12 @@ async function createPipeline(
       const pipelineOptions: PretrainedModelOptions & { sequentialSessionLoad?: boolean } = {
         device,
         dtype,
-        // WASM sessions cap graph optimization at "basic" (D-014): the level-2
-        // QDQ transform in the bundled onnxruntime-web build rejects the 8-bit
-        // decoders' tied embed_tokens weight ("Missing required scale …
-        // DequantizeLinear"). q4 models use native MatMulNBits ops, so the
-        // lower level costs them nothing. WebGPU keeps the default level.
-        ...(device === "wasm" && {
-          session_options: { graphOptimizationLevel: "basic" as const },
-        }),
+        // No session_options: every backend runs at onnxruntime's default
+        // graph optimization level. D-014's WASM "basic" cap worked around a
+        // level-2 QDQ bug in ort-web 1.26.0-dev that rejected the 8-bit
+        // decoders; the 1.31.0-dev build bundled with Transformers.js 4.3.2
+        // loads them at every level (D-WS1c, pinned in
+        // tests/transformers-runtime.test.ts).
         progress_callback: forwardProgress,
         // D-027/D-029: sequential sub-model session loading trades load speed
         // for a lower peak-memory footprint — only worth it where the UI
diff --git a/tests/offline.md b/tests/offline.md
index c1f0912..1206587 100644
--- a/tests/offline.md
+++ b/tests/offline.md
@@ -69,6 +69,11 @@ The worker now caps WASM sessions at `graphOptimizationLevel: "basic"`
 outside the browser. **Re-run this step with Backend = WASM to confirm in a
 real browser.**
 
+**Update (2026-10-30, D-WS1c):** the Transformers.js 4.3.2 bump brings an
+onnxruntime-web build without that bug, so the cap is gone and WASM sessions
+run at the default level again. Re-run this step with Backend = WASM (Whisper
+Tiny and Tiny.en) to confirm the session still loads in a real browser.
+
 ## 3. Go offline and transcribe
 
 1. DevTools → Network → throttling **Offline** (or OS airplane mode — stronger,
diff --git a/tests/transformers-runtime.test.ts b/tests/transformers-runtime.test.ts
index b790df7..06fac6c 100644
--- a/tests/transformers-runtime.test.ts
+++ b/tests/transformers-runtime.test.ts
@@ -54,4 +54,17 @@ describe("@huggingface/transformers runtime", () => {
     const source = read(join(PKG_DIR, "src/models/whisper/modeling_whisper.js"));
     expect(source).toContain("if (generation_config.return_timestamps && !kwargs.max_new_tokens)");
   });
+
+  test("onnxruntime-web is the build D-WS1c re-tested 8-bit decoders on at the default optimization level", () => {
+    // D-014's "basic" cap was dropped because this build loads the q8 merged
+    // decoders at every graphOptimizationLevel. A different build needs the
+    // D-WS1c session-creation check re-run before it ships.
+    const ortWeb = JSON.parse(read(join(ROOT, "node_modules/onnxruntime-web/package.json"))).version;
+    expect(ortWeb).toBe("1.31.0-dev.20260914-8d85527a0");
+  });
+
+  test("worker leaves WASM sessions at the default graph optimization level (D-WS1c)", () => {
+    const worker = read(join(ROOT, "src/worker/inference.worker.ts"));
+    expect(worker).not.toContain("graphOptimizationLevel");
+  });
 });

From 7b65f1f727c5d5cd43f4df2e6dae10c38b020a49 Mon Sep 17 00:00:00 2001
From: Lucas Winther <lucwin@ece.au.dk>
Date: Fri, 30 Oct 2026 01:04:18 +0100
Subject: [PATCH 6/6] Remove the finished Transformers.js 4.3.2 upgrade plan

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 docs/plans/001-1-transformers-upgrade.md | 122 -----------------------
 1 file changed, 122 deletions(-)
 delete mode 100644 docs/plans/001-1-transformers-upgrade.md

diff --git a/docs/plans/001-1-transformers-upgrade.md b/docs/plans/001-1-transformers-upgrade.md
deleted file mode 100644
index 998bbf9..0000000
--- a/docs/plans/001-1-transformers-upgrade.md
+++ /dev/null
@@ -1,122 +0,0 @@
----
-status: in-progress
----
-
-# 001-1 — Transformers.js 4.2.0 → 4.3.2 Implementation Plan
-
-> **For agentic workers:** REQUIRED SUB-SKILL: superpowers:executing-plans (inline, no nested
-> subagents — coordination plan rule). Steps use checkbox (`- [ ]`) syntax for tracking.
-
-**Goal:** run the browser engine on `@huggingface/transformers` 4.3.2 with the D-027/D-028
-sequential-session patch carried over, and re-test the decisions the upgrade may obsolete.
-
-**Architecture:** dependency bump + `bun patch` regeneration; a small runtime-guard test file pins
-the installed version, the patch, and the upstream seek-loop condition D-021 depends on, so a future
-bump that silently drops the patch or changes the condition fails the fast suite. Re-tests run as
-scratch measurement scripts outside the repo (`/tmp/ws1/`); their numbers go into `D-WS1*` entries.
-
-**Tech Stack:** Bun 1.3, `@huggingface/transformers` 4.3.2 (onnxruntime-web 1.31.0-dev.20260914,
-onnxruntime-node 1.30.0), bun:test.
-
-**Spec:** `docs/specs/001-transcription-quality-and-speed.md` (Goal 1); coordination rules in
-`docs/plans/001-0-coordination.md`.
-
-## Global Constraints
-
-- Bun only; no new runtime dependency; transformers stays a devDependency (D-031).
-- New decisions are `## D-WS1<letter> — …` appended at the bottom of `docs/Decisions.md`; Accepted
-  entries are superseded, never rewritten.
-- Heavy commands (real-model runs, benchmarks, model downloads, full `bun test`) under
-  `flock /tmp/whisper-heavy.lock`. Ports 3110–3119. No push, no publishing.
-- Measurements are CPU numbers (onnxruntime-node, or onnxruntime-web wasm EP under Bun); say which.
-- No WebGPU-only default change ships on WASM numbers; WebGPU items → "needs owner's browser check".
-
-## Review Focus
-
-1. **Patch silently lost on reinstall** (lockfile/`patchedDependencies` key mismatch) → the app
-   loads fine but mobile OOM returns. Pinned by Task 1's patch-applied test.
-2. **onnxruntime-web file names changed** (new version may ship different `.mjs/.wasm` names) →
-   `/ort/` serving and `dist/ort` copy must still contain what ort-web requests. Task 1: build and
-   check `dist/ort/` contains `ort-wasm-simd-threaded.jsep.{mjs,wasm}` (the WebGPU bundle's files).
-3. **Upstream changes the seek-loop condition** → D-021's `max_new_tokens` could become wrong or
-   unneeded without notice. Pinned by Task 2's source-tripwire test.
-4. **onnxruntime-node 1.30 drifts real-model WER** → `tests/live-real-model.test.ts` under the lock
-   (Task 5).
-5. **q8 decoders on WASM at default optimization level** (D-014's failure) — Task 3 measures every
-   level before any change to the worker's session options.
-
----
-
-### Task 1: Upgrade to 4.3.2 and carry the patch
-
-**Files:**
-- Create: `tests/transformers-runtime.test.ts`
-- Modify: `package.json`, `bun.lock`, `AGENTS.md` (patch path), `docs/WorkBreakdown.md`
-- Create: `patches/@huggingface%2Ftransformers@4.3.2.patch`; Delete: the 4.2.0 patch
-
-**Interfaces:**
-- Produces: `tests/transformers-runtime.test.ts` (Task 2 adds a case to it).
-
-- [x] **Step 1: Write the failing test** `describe("@huggingface/transformers runtime")`:
-  - `"installed version is the pinned 4.3.2"` — `node_modules/@huggingface/transformers/package.json`
-    `.version === "4.3.2"`.
-  - `"patchedDependencies points at an existing patch for the installed version"` — root
-    `package.json` `patchedDependencies["@huggingface/transformers@4.3.2"]` is a path that exists.
-  - `"web bundle's constructSessions carries the sequential-load patch (D-027/D-028)"` — the
-    `constructSessions` function text sliced from `dist/transformers.web.js` contains
-    `options?.sequentialSessionLoad` and both `Promise.all(` and `for (const name of Object.keys(names))`.
-- [x] **Step 2: Run** `bun test tests/transformers-runtime.test.ts` → FAIL on version (4.2.0) and key.
-- [x] **Step 3:** `bun add -d @huggingface/transformers@4.3.2` (remove the 4.2.0
-  `patchedDependencies` entry first if bun refuses), `bun patch @huggingface/transformers`, re-apply
-  the 4.2.0 hunk to `constructSessions` in `dist/transformers.web.js` (upstream is unchanged:
-  still a bare `Promise.all`), `bun patch --commit node_modules/@huggingface/transformers`.
-  `git rm` the 4.2.0 patch. Re-link the shared `.cache` symlink if the reinstall removed it.
-- [x] **Step 4: Run** the test → PASS; `bun install --frozen-lockfile` clean; typecheck; fast
-  suite; `bun run build`; `ls dist/ort` shows the files ort-web 1.31 requests.
-- [x] **Step 5:** docs: AGENTS.md patch filename; `D-WS1a` (upgrade, patch carried, why upstream
-  doesn't obsolete it, ort versions, Parakeet = CTC only); WorkBreakdown tick. Commit
-  "Upgrade @huggingface/transformers to 4.3.2 and carry the sequential-session patch".
-
-### Task 2: D-021 re-test (seek loop)
-
-**Files:** Modify `tests/transformers-runtime.test.ts`, `docs/Decisions.md`,
-`src/worker/inference.worker.ts` (comment only: "4.2" → "4.2–4.3", cite D-WS1b).
-
-- [x] **Step 1: Test** `"Whisper generate still takes the seek loop when max_new_tokens is unset (D-021)"`
-  — `src/models/whisper/modeling_whisper.js` contains
-  `if (generation_config.return_timestamps && !kwargs.max_new_tokens)`. Run → PASS expected
-  (tripwire; it encodes the revisit condition, verified against the 4.3.2 source).
-- [x] **Step 2: Measure** (`/tmp/ws1/d021.ts`, onnxruntime-node, under the lock): tiny.en q8 on
-  `en_alien.opus` (ffmpeg-static → 16 kHz f32), pipeline options as the worker
-  (`chunk_length_s 30, stride_length_s 5, return_timestamps true`), with and without
-  `max_new_tokens: 440`; record wall-clock, generate-pass count (wrap `model.generate`), window
-  count, WER vs `en_alien.txt` (`tests/dsp.ts` `wordErrorRate`).
-- [x] **Step 3:** `D-WS1b` with the numbers; keep `max_new_tokens: 440` unless the seek path is now
-  both faster and not worse on WER. Commit.
-
-### Task 3: D-014 re-test (WASM graphOptimizationLevel)
-
-**Files:** `docs/Decisions.md`; `src/worker/inference.worker.ts` only if the outcome is "drop".
-
-- [x] **Step 1: Measure** (`/tmp/ws1/d014.ts`): `globalThis[Symbol.for("onnxruntime")] =
-  await import("onnxruntime-web")` before importing transformers, wasm EP, 1 thread; for
-  `onnx-community/whisper-tiny` `decoder_model_merged_quantized.onnx` create a session at
-  `disabled/basic/extended/all`; record success/error. If all load: transcribe `en_aiproblem` with
-  tiny.en q8 at `basic` vs default (`all`), 3 warm runs each, wall-clock + text identity.
-- [x] **Step 2:** If default fails → keep, `D-WS1c` "still needed on ort-web 1.31.0-dev". If it
-  loads and is not slower → remove the override (worker comment cites D-WS1c), run a q8 transcribe
-  again through the harness with the worker's new options. Commit.
-
-### Task 4: WebGPU-affecting changes (D-022, D-025/D-026) — inspection only
-
-- [x] **Step 1:** Read 4.3.0/4.3.1/4.3.2 release notes and diff 4.2.0↔4.3.2 `src/` for
-  WebGPU/fp16/Firefox/Safari changes; check ort-web 1.31 dist for Gecko/fp16 handling.
-- [x] **Step 2:** `D-WS1d` listing each item as "needs owner's browser check" with what to try
-  (explicit WebGPU on Firefox for D-026; medium fp16 for D-022; Safari 26 WebGPU). No code change.
-  Commit.
-
-### Task 5: Verify and finish
-
-- [ ] typecheck, fast suite, build green; `flock /tmp/whisper-heavy.lock bun test
-  tests/live-real-model.test.ts` green; record WER per clip in D-WS1a if changed from the bars.
-- [ ] `git status` clean; last commit `git rm docs/plans/001-1-transformers-upgrade.md`.