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Mark Knichel
@markknichel
Engineering @Vercel, previously Google
Joined September 2013
128 Following
127 Followers
67 Posts
If you're looking to see what tags are causing pages to be regenerated, try "Triggering Tag" in Observability. We were debugging an issue today and it helped a customer narrow in on their problem
Here’s a dead simple CLI tool for uploading files/media to Vercel Blob: https://t.co/eu60tLfm7M
You can easily configure it with all the Vercel goodies like domains, firewall, etc.
Presigned URLs with private blobs are a great way to keep your days private and control who can access your blob store if you need it.
You can now generate time-bound signed URLs for Vercel Blob.
Each URL is scoped to a single operation and object, so you can control how clients interact with your store.
https://t.co/lGejModtiO
Long lived tokens are trouble if they ever get exposed, but OIDC tokens are ephemeral and are much safer. Try switching today and let us know how it goes
h/t to @FalcoAgustin and @elliotdauber
Vercel Blob now supports OIDC authentication.
Authenticate with short-lived, project-scoped tokens instead of long-lived credentials.
https://t.co/ulTe4tL9RC
Who to follow
Max Leiter
@maxleiter
working on claude code. programming and open-source. opinions mine if they're good. prev @v0 @vercel
Luba Kravchenko 
@LubaKravche
Working on Vercel’s CDN, mostly cache stuff. Previously was trying to modernize insurance and before that crying (studying) in Waterloo
Grace Yun
@jueungraceyun
beep boop @anthropicai, ex @vercel @v0
@gudmundur Excited to see your next thing. Good luck!
RT @vercel_dev: Flat Rate CDN is in Limited Beta for Pro teams.
You get a fixed monthly fee for Vercel CDN usage, with no overages for vir…
Another firewall drop for the day. Try out the firewall: https://t.co/0lTbBznmOV
All firewall-mitigated traffic is now free on Vercel.
Starting today, you aren't charged for requests that are denied, challenged, or rate-limited by Vercel Firewall. This extends free DDoS mitigation to rules you configure.
https://t.co/vCNcD3qT8m
@patrickssons @rauchg Certain actions from agents* are not allowed to be done automatically through the CLI and the agent is instructed to pass review and publishing the rule off to the person
@patrickssons @rauchg Certain actions are not allowed from the CLI and the skill also contains a lot of best practices: https://t.co/6Zr22RwGNP
@puppeteer_0 @rauchg It's a standard approach. There should only be a small amount of latency added for the extra hop. You can also cache content in Vercel's regions with the same approach
@puppeteer_0 @rauchg You can give https://t.co/Pqr9TJfm9Y a shot and let me know if anything doesn't work
Simplify creating and managing firewall rules through the CLI.
Nice ship by @yashk_7
The new Vercel CLI 𝚏𝚒𝚛𝚎𝚠𝚊𝚕𝚕 command brings firewall configuration to the terminal.
You and your agents can now manage custom rules, IP blocks, system mitigations, Attack Mode, and more:
https://t.co/hfjj8o4bty
This was a fun one to work on. h/t to @z0oks for the CDN map.
What else would you like to see in the dashboard for the CDN?
Vercel CDN now has a dedicated dashboard experience.
• Generate rules with AI prompts
• Update routing rules without redeploying
• View a live map of your global traffic
• Purge cache by tag instantly
Start building on Vercel with just a domain.
Bulk redirects on Vercel now scale to 1 million per project with near-constant lookup time.
We shipped the simplest thing first, profiled it in production, and iterated from there ↓
https://t.co/h7woUGbVFj
Developing with AI:
With this you can now do things like add secrets as headers to external rewrites or change function regions or fluid config per environment. Let us know how it works
Introducing 𝚟𝚎𝚛𝚌𝚎𝚕.𝚝𝚜: Programmatic config for your Vercel projects.
• Type-safe with full TypeScript support
• Environment-aware configuration
• Shared logic and conditional behavior
https://t.co/z1E2CXoPst
Dynamic updates, marketing redirects, or even emergency fixes made easier. More coming in 2026
You can now manage bulk redirects via UI, API, or CLI on Vercel. No deployment or code change required.
See how you can fix broken links in seconds ↓
@thanaen_dev @vercel_dev You can use redirects in next.config.js too, but it's limited in number. This allows you to have a lot more while still serving them performantly
Trying to manage thousands of redirects from old marketing URLs is a pain. This can help.
Vercel dashboard integration coming soon
Vercel now natively supports bulk redirects, scaling up to 1 million redirects per project.
Set 𝚋𝚞𝚕𝚔𝚁𝚎𝚍𝚒𝚛𝚎𝚌𝚝𝚜𝙿𝚊𝚝𝚑 to your redirects folder and they'll be automatically imported at build time.
Available for Pro and Enterprise teams.
https://t.co/QjN9Llfw82
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