feat(vercel): Vercel provider — auth, deploy engine, Function (async + Effect), and the platform surface

[sam-goodwin]

Infrastructure-as-Effects support for Vercel, at parity with the Cloudflare provider where the platform allows. Built wave-by-wave against a real Pro team — 60+ live tests, each service's API mismatches fed back as typed-error patches to distilled (companion: alchemy-run/distilled#457, submodule bumped here).

// Effect-native Fluid function: HTTP + queue consumer + cron in one class
export default class Api extends Vercel.Function<Api>()(
  "Api",
  { main: import.meta.url, resources: { memory: "performance", maxDuration: 60 } },
  Effect.gen(function* () {
    const flags   = yield* Vercel.ReadEdgeConfig(Flags);
    const uploads = yield* Vercel.ReadWriteBlob(Uploads);
    const orders  = yield* Vercel.SendMessage(Orders);     // typed Topic value

    yield* Vercel.subscribe(Orders, Effect.fn(function* (order) {
      yield* uploads.put(`receipts/${order.orderId}.json`, JSON.stringify(order));
    }));
    yield* Vercel.cron("0 3 * * *", nightlyCleanup);

    return {
      fetch: Effect.gen(function* () {
        yield* orders.send({ orderId: crypto.randomUUID(), amountCents: 4200 }).pipe(Effect.orDie);
        return yield* HttpServerResponse.json({ queued: true });
      }),
    };
  }).pipe(Effect.provide([Vercel.ReadEdgeConfigHttp, Vercel.ReadWriteBlobHttp, Vercel.SendMessageHttp])),
) {}

Plain async mode works too (Vercel.Function("Hooks", { main, env }) — web-standard handlers, InferEnv-typed process.env), plus Website.{StaticSite,Nuxt,Astro,SvelteKit} over the same deploy engine.

What's inside

• Auth: VercelAuth (env / stored token, team picker), VercelEnvironment (teamId scoping), alchemy login integration
• Deploy engine (internal library): Build Output v3 synthesis → SHA1 upload → immutable deployments with meta.alchemy* stamps; crash recovery by content hash; protection-bypass secrets minted before first deploy (they only open later deployments); state-persisted managedEnv baseline for Vercel's write-only sensitive env rows
• Compute: Function (async + Effect bridge — re-entrant for Fluid concurrency, per-request Scope settled via waitUntil, SIGTERM instance-scope close), Function.URL, InvokeFunction (circular A↔B topologies via precreate), cron
• Queues: typed Topic config values (schema + region pinning), SendMessage, poll ReceiveMessages, and subscribe — real platform push delivery through a separate consumer .func (a trigger on the main function would kill all public HTTP routing)
• Resources: Project, ProjectEnv, EdgeConfig (+EdgeConfigToken), BlobStore (+store↔project connections), Domain, DnsRecord, ProjectDomain, Cert, Webhook, Drain, FirewallConfig, CustomEnvironment, SharedEnv, AccessGroup(+Project), Alias + promoteToProduction/rollbackProduction, RollingRelease
• Topology: project-per-stage for durable stages; ephemeral/PR stages share a durable stage's project via cross-stage refs as additive preview tenants; hard invariant of one production owner per project

Entitlement-gated surfaces (Enterprise access groups, multi custom envs, certs) ship fully implemented with typed-tag probe tests and VERCEL_TEST_* skipIf gates.

🤖 Generated with Claude Code

[alchemy-version-bot]

Install the packages built from this commit:

Alchemy

alchemy

bun add https://pkg.ing/alchemy/0d72e38

@alchemy.run/better-auth

bun add https://pkg.ing/@alchemy.run/better-auth/0d72e38

@alchemy.run/cloudflare-runtime

bun add https://pkg.ing/@alchemy.run/cloudflare-runtime/0d72e38

@alchemy.run/frontend-frameworks

bun add https://pkg.ing/@alchemy.run/frontend-frameworks/0d72e38

@alchemy.run/node-utils

bun add https://pkg.ing/@alchemy.run/node-utils/0d72e38

@alchemy.run/pr-package

bun add https://pkg.ing/@alchemy.run/pr-package/0d72e38

@alchemy.run/floci

bun add https://pkg.ing/@alchemy.run/floci/0d72e38

Distilled

@distilled.cloud/core

bun add https://pkg.ing/@distilled.cloud/core/3401096

@distilled.cloud/aws

bun add https://pkg.ing/@distilled.cloud/aws/3401096

@distilled.cloud/axiom

bun add https://pkg.ing/@distilled.cloud/axiom/3401096

@distilled.cloud/cloudflare

bun add https://pkg.ing/@distilled.cloud/cloudflare/3401096

@distilled.cloud/neon

bun add https://pkg.ing/@distilled.cloud/neon/3401096

@distilled.cloud/planetscale

bun add https://pkg.ing/@distilled.cloud/planetscale/3401096

[alchemy-version-bot]

Website Preview Deployed

URL: https://alchemyeffectwebsite-website-pr-1217-3tlvgy45zhoz7h7w.testing-2b2.workers.dev

Built from commit 0d72e38.

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