Config catalog, module graph, event producer-consumer tables, and
third-party notices regenerate over the webworker surface; the oxlint
rule fingerprint and the ui-renderer NodeNext import face follow.
One Vite build emits dist/index.html and dist/preview.html sharing every
chunk; the only difference is one prepended bootstrap entry whose module
connects the worker host, so the page from the stock entry onward is the
served startup chain verbatim. The dist moves to a relative base so the
preview mounts under any static directory, and the served form anchors
deep SPA-fallback paths with a rendered <base href="/">. The preview-boot
e2e serves the real built pages, packs the VFS image when absent, and
holds the boot line's lowering contract, the interactive hero, and a
clean page-error channel in headless Chromium.
The webserver renders a boot-readiness tail after the injection rows and
AppWebEntry.run awaits the __DSH_BOOT_READY__ deferred before reading any
injected state. Whichever bootstrap applies the injection table settles
the deferred - the served renderer resolves it inline, an asynchronous
bootstrap installs it ahead of the entry module and settles it with the
handshake - so both deployments run one startup chain and a failed
handshake surfaces on the boot page instead of proceeding on missing
globals.
Buy the grammar, own the execution: @yarnpkg/parsers parses the command
line - aliased at bundle time to its shell entry so the root barrel's
syml/js-yaml closure stays out of the worker - and a VFS-backed evaluator
with a coreutils command table runs it inside the worker host. Each shell
process is a real child WebWorker spawned from the same bundle (the first
frame decides the role), so the TERM-then-KILL ladder is real - TERM
requests, KILL terminates the worker - and the file face stays
asynchronous end to end, since the deployment target serves no COOP/COEP
headers and SharedArrayBuffer never exists there. node:child_process
reports through the ChildProcess surface the subprocess service consumes;
execSync, execFileSync and fork refuse, and node-pty stays stubbed.
Two private experimental packages run the whole harness tree inside one
dedicated Web Worker. dsh-experimental-webworker-runtime owns the in-memory
VFS (BigInt stats with per-path identity and strictly increasing mtimes),
the CommonJS wrapper loader over a lazily-evaluated builtin table whose
shims typecheck against Node's own module types, the postMessage tunnel
speaking plain HTTP, the AsyncLocalStorage runtime, and the worker
assembly. dsh-experimental-webworker-packer lowers every module body at
pack time against the shared wrapper contract, sweeps the profile closure
by static reachability, and writes a deterministically gzip-compressed tar
the worker inflates through the browser's native DecompressionStream while
it downloads.
Tianyi Cui