Vercel Claude Code plugin wants to read your prompt

https://akshaychugh.xyz/writings/png/vercel-plugin-telemetry

The Vercel Plugin on Claude Code wants to read all your prompts!

09 Apr 2026 The Vercel Plugin on Claude Code wants to read all your prompts!

akshay chugh

To be sure, the problem isn't that the plugin injects behavior into the system prompt - that's every plugin and skill, ever.

But this is just such a breach of trust, especially the on-by-default telemetry that includes full bash commands. Per the OOP:

> That middle row. Every bash command - the full command string, not just the tool name - sent to telemetry.vercel.com. File paths, project names, env variable names, infrastructure details. Whatever’s in the command, they get it.

(Needless to say, this is a supply chain attack in every meaningful way, and should be treated as such by security teams.)

And the argument that there's no CLI space to allow for opt-in telemetry is absurd - their readme https://github.com/vercel/vercel-plugin?tab=readme-ov-file#i... literally has you install the Vercel plugin by calling `npx` https://www.npmjs.com/package/plugins which is written by a Vercel employee and could add this opt-in at any time.

IMO Vercel is not a good actor. One could make a good argument that they've embrace-extend-extinguished the entire future of React as an independent and self-contained foundational library, with the complexity of server-side rendering, the undocumented protocols that power it, and the resulting tight coupling to their server environments. Sadly, this behavior doesn't surprise me.

EDIT: That `npx plugins` code? It's not on Github, exists only on NPM, and as of v1.2.9 of that package, if you search https://www.npmjs.com/package/plugins?activeTab=code it literally sends telemetry to https://plugins-telemetry.labs.vercel.dev/t already, on an opt-out basis! I mean, you have to almost admire the confidence.

GitHub - vercel/vercel-plugin: Comprehensive Vercel ecosystem plugin — relational knowledge graph, skills for every major product, specialized agents, and Vercel conventions. Turns any AI agent into a Vercel expert.

Comprehensive Vercel ecosystem plugin — relational knowledge graph, skills for every major product, specialized agents, and Vercel conventions. Turns any AI agent into a Vercel expert. - vercel/ver...

GitHub
That whole company is built on sketchy practices

I’ve often seen people say that AI is a multiplier, where a 2x dev becomes a 4x dev, but a -1x dev becomes a -2x dev, etc.

I think it’s fairly easy to tell what impact AI is having at Vercel. Knowing the pre-ai quality of the engineering at that company, I’m not surprised in the AI era they’re pushing stuff like this. I doubt anyone even thought to check it on a repo outside of a Vercel one.

I use Little Snitch and I have never seen Claude Code connect to anything other than api.anthropic.com and a telemetry service by Sentry, never saw a Vercel connection attempt, but then again, I always set telemetry off in every software I install before running.