docs(roadmap): expose worker packaging defect as an independent item in section 1

ROADMAP.md

@@ -33,14 +33,16 @@ from the other side.
 - [~] **Gate A — a bare Vite page loads a prebuilt model and generates.**
       [examples/bare/](examples/bare/) exists and the GPU-free half is proven: `vite build` resolves
       through the `exports` map and splits into an entry chunk, the decode worker as its own chunk,
-      and the 6 MB WebLLM bundle as a lazy one.
-
-      **Broke on real-browser run: worker unbundled imports in production.**
-      When deployed to a static host (Hugging Face Spaces), `engine.load()` threw
-      `PACKAGE_INCOMPLETE`: *"The decode worker failed to load from .../assets/engine-worker-dJUbtWsb.js"*.
-
-      *Root cause:* Rollup's `new Worker(new URL(..., import.meta.url), { type: "module" })` handling
-      copies `engine-worker.js` verbatim as an asset chunk without bundling or rewriting its internal
+      and the 6 MB WebLLM bundle as a lazy one. What remains is **one run in a WebGPU browser** to
+      confirm it generates. `npm run verify-consumer` already exercises a real install end to end,
+      short of the actual generation.
+- [ ] **Defect: Worker unbundled relative imports in production (`vite build` / Rollup blind spot).**
+      First real-browser run on a static host (Hugging Face Spaces) surfaced a packaging defect
+      that passed all prior headless assertions. On `vite build`, `engine.load()` threw
+      `PACKAGE_INCOMPLETE`: *"The decode worker failed to load from .../assets/engine-worker-*.js"*.
+
+      **Root cause:** Rollup's `new Worker(new URL(..., import.meta.url), { type: "module" })`
+      handling copies `engine-worker.js` as an asset chunk without bundling or rewriting its internal
       ESM imports. The emitted worker still carries:
       `import { WebWorkerMLCEngineHandler } from "../../vendor/web-llm.js"`
       `import { WORKER_CONFIGURE } from "./constants.js"`
@@ -51,7 +53,7 @@ from the other side.
       missed it because it asserted file *existence* (`assets.some(f => f.startsWith("engine-worker"))`),
       never executing the worker in a browser.
 
-      *Remediation:*
+      **Resolution:**
       - [x] **Demo workaround:** Pre-bundle `engine-worker.js` with `esbuild --bundle --format=esm` into a
             standalone 6.58 MB file (`public/engine-worker.js`) with zero external imports, and pass explicit
             `workerUrl: new URL("engine-worker.js", window.location.href)`.