Vercel

Deployment URLs — logs & source

Vercel has shortcut suffixes you can append to any deployment URL:

• /_logs — view deployment logs
• /_src — view deployment source

https://my-deployment-my-username.vercel.app/_logs
https://my-deployment-my-username.vercel.app/_src

Qwestly examples:

• https://api.qwestly.com/_logs
• https://api.qwestly.com/_src

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Build: Serverless Function size limit

Error: A Serverless Function has exceeded the unzipped maximum size of 250 MB.

• Docs: https://vercel.link/serverless-function-size

Fix — disable build cache:

VERCEL_FORCE_NO_BUILD_CACHE=1

• Docs: https://vercel.com/docs/deployments/troubleshoot-a-build#managing-build-cache

The Next.js build cache (.next/cache/webpack) can balloon and push the function over the 250 MB unzipped limit.

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'use workflow' directive

Vercel Workflows is a fully managed platform for durable functions / AI agents (JS, TS, Python). Mark a function as a workflow by placing 'use workflow' as the first statement:

export async function aiContentWorkflow(topic: string) {
  'use workflow';

  const draft = await generateDraft(topic);
  const summary = await summarizeDraft(draft);
  return { draft, summary };
}

• The 'use step' directive works similarly inside workflows to mark individual steps.
• Workflows are resumable (pause minutes–months), durable (survive deploys/crashes), observable (built-in logs/metrics/tracing in the Vercel dashboard).
• Install: pnpm i workflow / npm i workflow / yarn add workflow
• Docs: https://vercel.com/docs/workflows

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Automation Bypass Secret

Used to bypass Vercel's deployment protection for automated deployments / CI.

VERCEL_AUTOMATION_BYPASS_SECRET=