Cristiano Oliveira

Software Engineer | “What I cannot build. I do not understand.”

[Cristiano Oliveira @cris_o]

🧵 I built a real-time AI interview app using Cloudflare Durable Objects, Workers AI, and Partykit.
It streams LLM responses, keeps per-user state in SQLite, and handles WebSocket auth + rate limits — all on the edge.

https://t.co/G8Pew9NHDH

Here’s how it works 👇

[antirez @antirez]

Btw, this time, I don't feel like to leave the agent as co author of the commits. When you are just a tool, I'm thankful for the help, but no way the commit of my ideas, design, attempts is going to be shared ;D

[Cristiano Oliveira @cris_o]

"the siren song of React's ecosystem often pulls projects back in..."

[Cristiano Oliveira @cris_o]

@ninepixelgrid This is great.....makes it feel like the web is back

[Cristiano Oliveira @cris_o]

“Hello, I’m in interested in the ninja turtle role…”

[Cloudflare Developers @CloudflareDev]

Say goodbye to stitching together multiple point solutions and WebRTC headaches when building realtime applications.

RealtimeKit SDK is a complete cross-platfrom toolkit to handle all the low-level complexities of building immersive video and audio experiences.

https://t.co/svN5rduWkH

[Cristiano Oliveira @cris_o]

7/ Blog post here 👉 https://t.co/WCzMqPvCp7

How to Handle SQLite Migrations in Durable Objects

Includes full code, patterns, scaling thoughts, and bonus gifs.

Enjoy! ⚡

[Cristiano Oliveira @cris_o]

1/ Every Durable Object in Cloudflare has its own SQLite database.

Which means... if your schema changes, you can't just run a global migration.

You need per-object migrations — safely, atomically, and with retries.

Here’s how I solved it 👇

[Cristiano Oliveira @cris_o]

6/ Need to rehydrate a Durable Object from R2?

Just run the same migrations before restoring state.

Want to mirror metadata into a global table in D1?

Yep — you can do that too.

[Cristiano Oliveira @cris_o]

@EyalToledano Thanks!!

[Cristiano Oliveira @cris_o]

🧵 I built a real-time AI interview app using Cloudflare Durable Objects, Workers AI, and Partykit.
It streams LLM responses, keeps per-user state in SQLite, and handles WebSocket auth + rate limits — all on the edge.

https://t.co/G8Pew9NHDH

Here’s how it works 👇

[Cristiano Oliveira @cris_o]

@ViktorBunin After the pain goes away a bit. reverse hyper 3 times a week and foundation training everyday is what fixed mine.

Reverse hyper is worth every penny and more.

https://t.co/iUTNUVaZ9e

https://t.co/zC4MAKewit

[Cristiano Oliveira @cris_o]

@isnit0 Yeah - it's pretty popular design format, I guess. I remember seeing the hard shadow on an ad from https://t.co/uoZv9NADph

For this, I started off from this screenshot and iterated on v0 from there.

[Cristiano Oliveira @cris_o]

@jcurtis same idea on the server, where you'll want to route to the correct durable object, etc..

These are things you'll eventually do in a bespoke way

[Cristiano Oliveira @cris_o]

@jcurtis partykit here is used for things you'll eventually end up building yourself.
On the client side, you'll need a way to properly handle socket connections, reconnect, routing, message etc..

[Cristiano Oliveira @cris_o]

UI in action

[Cristiano Oliveira @cris_o]

6/ Want to try it?

🎙️ https://t.co/G8Pew9NHDH
Let me know what you're building with Cloudflare or LLMs — happy to share thoughts!

[Cristiano Oliveira @cris_o]

@naumenko_roman They have some stuff with cloudflare zero trust.
This was a part that I just wanted to get out of the way.
Was more concerned with the socket, durable object + ai integration.

[Cristiano Oliveira @cris_o]

@ritakozlov 🫶 thanks!