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refactor(web): deploy the dashboard as a Cloudflare.Website.Vite worker - #928
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`apps/web` built through a `Command.Build` that shelled out to `bun run build`, and the Worker served the resulting `dist/` as `assets`. Under `alchemy dev` the Worker was skipped entirely and a bare `vite dev` was spawned beside the stack as a `Command.Dev` process app. That spawn inherited the alchemy CLI's `NODE_ENV=production`. Vite reads that variable for `import.meta.env.DEV` and `PROD` rather than taking them from `--mode`, so the dev server served `MODE: "development"` alongside `DEV: false, PROD: true`: every dev-only branch dead and every production branch live, on a dev server. `/lab` 404ing under `bun dev` was the visible half, and it had never worked there. Alchemy already knows this variable is toxic to a vite child and strips it, with a comment saying why, in `Cloudflare/Workers/ViteChild.ts`. That spawner only runs for a Worker with a vite source, so it never ran for us. Rather than set NODE_ENV ourselves and paper over it, web becomes a vite-source Worker and the guard applies for free. `Cloudflare.Website.Vite` now owns the build: one vite build through the Cloudflare vite plugin produces the client assets and the server bundle. `Command.Build` is gone, web leaves `DEV_PROCESS_APPS`, and it is served through `serveWorker` like every other Worker. `VITE_*` keys in `env` are inlined into the bundle as `import.meta.env.*` by the vite source, which is the job the removed build command's env did. The Effect implementation the Worker class carried as its third argument moves into `worker-entry.ts` as a plain module, because a vite source owns the entry. It was unwrapping a request and reading three bindings around `handleRequest`, which was already a plain async function. The resource type does not change: `Website.Vite` builds a `Cloudflare.Worker`, and the logical id stays `app`, so nothing plans a delete of the Worker behind app.maple.dev. Fixes a production URL leaking into dev builds. `urls.ingest` had no dev branch, unlike `urls.api` and `urls.electricSync`, so it resolved to ingest.maple.dev on every stage. It went unnoticed while web's dev bundle took `VITE_INGEST_URL` from vite.config.ts's `PORTLESS_URL` sibling lookup; now that props feed the bundle, that value is what the browser SDK posts to, and a dev build would have sent local telemetry to production ingest. Verified against a running stack: alchemy's vite child serves web, the served modules report `DEV: true, PROD: false`, /lab routes resolve, and the onboarding card reads https://ingest.localhost. No deploy has been run.
📝 WalkthroughWalkthroughThe web application now runs as an Alchemy-managed Vite Worker during development. A module Worker entry delegates requests to ChangesWeb Worker development
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Sequence Diagram(s)sequenceDiagram
participant AlchemyDev
participant WebsiteVite
participant WorkerEntry
participant HandleRequest
AlchemyDev->>WebsiteVite: create and serve app Worker
WebsiteVite->>WorkerEntry: deliver Request and WebWorkerEnv
WorkerEntry->>HandleRequest: delegate fetch(request, env)
HandleRequest-->>WorkerEntry: return Promise<Response>
Suggested reviewers: Merge Risk: 🟡 Moderate · up to The formatting check can fail because the updated Knip configuration contains comments in a strict JSON file. Correct the file extension or remove the comments before merging. 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches🧪 Generate unit tests (beta)
Warning Some tools did not complete. Review the errors below. 🔧 Biome (2.5.11)knip.jsonFile contains syntax errors that prevent linting: Line 12: Expected a property but instead found '// ... [truncated 971 characters] ... ; Line 87: End of file expected; Line 89: End of file expected; Line 90: End of file expected; Line 90: End of file expected; Line 91: Expected a property but instead found '// The dev-sidecar entry alchemy loads by URL, not by import.'.; Line 90: End of file expected; Line 91: End of file expected; Line 92: End of file expected; Line 92: End of file expected; Line 92: End of file expected; Line 93: End of file expected; Line 94: End of file expected; Line 94: End of file expected; Line 94: End of file expected; Line 96: End of file expected; Line 97: End of file expected; Line 97: End of file expected; Line 97: End of file expected; Line 100: End of file expected; Line 101: End of file expected; Line 101: End of file expected; Line 101: End of file expected; Line 117: End of file expected Comment |
`Cloudflare.Website.Vite` names the deployed entry as the string `main: "src/worker-entry.ts"`. knip cannot follow a path inside a string, so it reported that entry and everything only it reaches as dead: the handler, the four OG renderers, the worker env types, and `@takumi-rs/wasm` along with them. Naming it as an entry is the same treatment `src/worker.ts` already gets, and for the same reason: nothing imports these modules, a bundler is told about them by configuration.
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In `@knip.json`:
- Around line 12-16: The Knip configuration contains comments in a strict JSON
file, which can fail the Oxfmt format check. Rename the configuration to
knip.jsonc so the comments remain valid, and ensure references or scripts
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The bug
/labhas never been reachable throughbun dev. Not the new routes —/lab/flow404s too.The cause is not the lab.
apps/webwas excluded fromalchemy devand a barevite devwas spawned beside the stack as aCommand.Devprocess app. That child inherits the alchemy CLI'sNODE_ENV=production, and Vite readsNODE_ENVforimport.meta.env.DEV/PRODrather than taking them from--mode. The served modules carried:So under
bun dev, everyimport.meta.env.DEVbranch in the dashboard was dead and everyPRODbranch was live. The lab route guard throwingnotFound()was just the visible half.Why this shape of fix
Alchemy already knows the variable is toxic to a Vite child, strips it, and says why:
That spawner only runs for a Worker with a vite source. We didn't have one, so the guard never ran for us. The first fix attempted here was setting
NODE_ENV: "development"on ourCommand.Dev— rejected in review as working around alchemy instead of using it. Correctly:Command.Devoffers no real lever anyway (undefinedenv values are filtered out rather than unset,extendEnvis not a prop), and the same leak is still present in the newest release (beta.78).So web becomes a vite-source Worker and the existing guard applies for free.
What changed
apps/webis now aCloudflare.Website.ViteWorker. Onevite buildthrough the Cloudflare Vite plugin produces the client assets and the server bundle.Command.Build("web-build")is removed.VITE_*keys inenvare inlined asimport.meta.env.*by the Vite source (Sources/Vite.ts), which is what the removed build command's env did throughvite.config.ts'sdefine.DEV_PROCESS_APPSand is served viaserveWorkerlike every other Worker, soalchemy devruns Vite rather than skipping the app.worker-entry.tsas a plain module — a Vite source owns the entry, and that argument has nowhere to go. It was only unwrapping a request and three bindings aroundhandleRequest, which was already a plain async function.landingandlocal-uistay onCommand.Dev(still gated on a productionCommand.Build), and now carry an explicitNODE_ENV: "development"with the reasoning, since the same hazard applies to them.A production URL that was leaking into dev builds
urls.ingesthad no dev branch, unlikeurls.apiandurls.electricSync— it resolved tohttps://ingest.maple.devon every stage including dev. Harmless while web's dev bundle tookVITE_INGEST_URLfromvite.config.ts'sPORTLESS_URLsibling lookup. But props now feed the bundle, so that value is what the browser SDK posts to, and a dev build would have sent local telemetry to production ingest. AddedMAPLE_INGEST_URLtodevEnvto match its two siblings.Reviewer notes
Website.Vitebuilds aCloudflare.Worker; state confirmsresourceType: Cloudflare.Workerwith logical idappunchanged. Nothing plans a delete + create of the Worker behindapp.maple.dev— the failure mode this repo hit on 2026-09-07.Effect.orDieon the props.Website.Viterequires anevererror channel whereCloudflare.WorkertoleratedConfigError. EveryplainFromcall in there carries a default, so reaching the error channel means the stack cannot read its own configuration. Flagging it as a real behaviour change.worker-env.tsupdated.check:bundleis unaffected. CI reads thedist/from the turbobun run buildstep, which is still a plainvite build.Verification
Verified against a running stack:
ViteChildRunnerserves web,https://web.localhost/lab/verdictand/lab/flowresolve, served modules reportDEV: true, PROD: false, and the onboarding card readshttps://ingest.localhost.tsc -p tsconfig.alchemy.json(the CI alchemy gate),apps/webandpackages/infratypecheck, and lint are all clean.No deploy has been run. Alchemy now builds web through the Cloudflare Vite plugin instead of
bun run build, so the uploaded asset layout and server bundle come from a path exercised only in dev here. This wants a PR preview (add thepreviewlabel) or a dev-stage deploy before prd.Need help on this PR? Tag
@codesmith-botwith what you need. Autofix is disabled.Summary by CodeRabbit
New Features
Bug Fixes
Documentation