Changelog from Diff Lab

cd apps/experiments/changelog-from-diff-lab
pnpm install
pnpm dev

Changelog from Diff Lab turns a pasted PR diff or commit log into { customerFacing, internalNotes } via generateObject. Outputs are capped and treated as drafts. Missing AI keys return 503 - nothing is fabricated.

FeaturesCopy Anchor Link

• Diff - dual changelog – customer-facing + internal notes.
• Length caps – ~20k chars of input; 12 bullets per list.
• Sample commit/diff – Redis FAQ cache example.
• Honest 503 when AI is unavailable.

Server ReferenceCopy Anchor Link

POST /api/changelogCopy Anchor Link

{ "diff": "commit ...\ndiff --git ..." }

Success (200)Copy Anchor Link

{
  "customerFacing": ["Faster FAQ answers via cache"],
  "internalNotes": ["Requires Upstash Redis env"],
  "provider": "ai-gateway"
}

Implementation DetailsCopy Anchor Link

Use CasesCopy Anchor Link

• Learn composition patterns for this lab’s stack.
• Prototype before wiring production auth and quotas.
• Deploy the standalone app as a reference implementation.

LimitationsCopy Anchor Link

• Demo-scale caps on input size and output counts.
• No auth / rate limits on public deploys.
• Model quality depends on input clarity.

Use in your projectCopy Anchor Link

Copy the Route Handler and logic.ts helpers from apps/experiments/changelog-from-diff-lab/. Wire your own persistence and auth as needed.

DeploymentCopy Anchor Link

Deploy on Vercel

Local DevelopmentCopy Anchor Link

cd apps/experiments/changelog-from-diff-lab
pnpm install
pnpm dev

ConfigurationCopy Anchor Link

Vercel / Next.js Features UsedCopy Anchor Link

• AI SDK generateObject
• Route Handlers
• Zod

Next StepsCopy Anchor Link