Vercel Rejects Deploys from AI Sub-Agents. Here's Why — and the Fix.

I built a web app using AI sub-agents to write the code and commit it. Deployments started failing silently. No error on the Vercel dashboard — just... nothing happened after a push. It took me an embarrassing amount of time to figure out why. The short version: Vercel validates git commit authors, and if the email doesn't match a known team member, the deployment is quietly rejected. Here's what happened and how to make it work. The Setup I'm building swisscontract.ai — a contract analysis tool for Swiss residents — using an AI sub-agent called Léa to handle development. Léa runs inside OpenClaw and spawns sub-agent sessions to write code, commit changes, and push to GitHub. The workflow: I describe a feature Léa opens a coding session (Claude Code / ACP) The sub-agent implements it, commits, and pushes GitHub Actions triggers → Vercel deploys Worked great on day one. Then it silently stopped working. What Broke When a sub-agent commits to git, it uses whatever git identity is configu