Stack by Convex

Featured videos

All videos

05:02

Type-Safe Environment Variables in Convex

4.2K views

5 months ago

Mike Cann

14:50

Streaming vs. Syncing: Why Your Chat App Is Burning Bandwidth

4.8K views

a year ago

Mike Cann

10:21

Why Convex Queries are the Ultimate Form of Derived State

1.8K views

2 years ago

Mike Cann

Patterns

All Patterns posts

12:30

I built a component to make high frequency updates work on Convex (kinda)

A while back I made a video about faking really high frequency updates on Convex. I've finally turned it into a generic component called Batched Replay, so here's what you can build with it, what it costs and whether I'd use it in production.

Mike Cann

12 minutes ago

37:50

Your database is lying to you about time

Date.now() in a Convex mutation isn't actually now, and _creationTime doesn't follow the order things were committed in. Ian sat me down at a whiteboard to explain the three times in a database, how you can miss rows, and how commit timestamps fix it.

Mike Cann

7 days ago

06:12

Is your agent writing proper Convex code?

These days my agent writes most of my code, but how do I actually know it's writing good, proper Convex code? One really good way is the Convex ESLint plugin, so here are the rules your agent is going to run into, plus the one I'd really recommend turning on.

Mike Cann

a month ago

Type-Safe Environment Variables in Convex

Convex can now declare and validate environment variables in code, giving backend functions a typed env object and catching missing or invalid deployment variables before runtime.

Mike Cann

5 months ago

Site Up. Costs Down: Optimizing OpenClaw’s 1M Weekly Active Users

ClawHub scaled from 0 to 1M visitors a week in just over a month. Here's how to the vibe-code went from "good enough for PMF" to "viral scale" by using good engineering practices.

Seth Raphael

7 months ago

Authorization In Practice

How to think about and implement authorization in your app. Think through each layers: clients, middleware, RBAC, RLS, and more. All with the power of code and abstractions.

Ian Macartney

a year ago

Argument Validation without Repetition

A few more advanced techniques & helpers to further reduce duplication and accelerate your Convex workflow.

Anjana Vakil

a year ago

AI Agents with Built-in Memory

With this new backend component, augment Agents to automatically save and search message history per-thread, providing realtime results across multiple tabs and users. Use it with the Workflow component to run reliably with retries and durability across server restarts.

Ian Macartney

2 years ago

Merging Streams of Convex data

New convex-helpers are available now for fetching streams of documents, merging them together, filtering them them out, and paginating the results. With these helpers, you can replicate patterns you may know from SQL: UNION ALL, JOIN, DISTINCT, GROUP BY, and WHERE clauses where index fields are skipped.

Lee Danilek

2 years ago

Local-First

All Local-First posts

Ian Macartney

Add a collaborative document editor to your app

Or how I learned to love BlockNote, Tiptap and ProseMirror OT sync.

Sync collaborative documents with Convex

Ian Macartney

Going local-first with Automerge and Convex

Learn about Automerge CRDTs for collaborative editing, syncing changes using Convex.

Building a collaborative task list using Automerge CRDTs and Convex sync

Sujay Jayakar

An Object Sync Engine for Local-first Apps

Object sync engines manage a rich object graph across multiple clients and a centralized server and are a great fit for building local-first apps.

Walkthroughs

All Walkthroughs posts

I built my family a giant touchscreen

I built a 40-inch infrared touchscreen as a family home hub, then used Codex and Convex to turn it into a whiteboard, calendar, chores tracker and smart-home dashboard.

Mike Cann

2 months ago

27:42

Building Convex OS, a Browser-Based React App with Real-Time Sync

When you react to app state the Convex way, multi-tab sync comes free. Here's how one developer built a Windows XP desktop in the browser, complete with an AI agent, using just four database tables.

Mike Cann

5 months ago

1:19:02

What to Do When You Mess Up Prod (Incident Response Guide)

SEV levels, triage, and stopping the bleeding before you debug. A practical guide to incident response from engineers who've led SEV 0s at Dropbox and Convex.

Jamie Turner

5 months ago

09:40

How to Give AI Agents a Bash Terminal Without Docker or VMs

Learn how to give AI agents a stateful bash terminal and virtual file system using Convex, without requiring containers or VMs.

Mike Cann

6 months ago

31:30

What ACTUALLY happens when you push to Convex?

A Convex infrastructure engineer walks through the full push pipeline, from type-checking in V8 to atomic schema cutover, and traces a request through FunRun, the committer, and optimistic concurrency control.

Convex

8 months ago

How to connect Convex to RunPod for serverless GPU workloads

Every GPU task I've run from a backend has the same problem: you fire off the job, then poll for results or wire up webhooks to know when it's done. This walkthrough shows a different approach. Convex triggers a GPU job on RunPod, and the RunPod worker calls mutations directly on Convex using the Python client. The frontend stays in sync through live queries. No polling, no webhook infrastructure. I'll walk through the full implementation using video background removal as the example, but the pattern works for any GPU workload — compression, transcription, object detection, whatever you need.

Jashwanth Peddisetty

9 months ago

Building a 70-Module Convex Backend: Web, Mobile & API in One Deployment

Hamza, shares a year-long build from 10 tables to 70+ Convex modules serving web, mobile, and REST APIs through a single deployment with one backend handling everything.

Hamza Saleem

10 months ago

How to Build Streaming Chat Apps with Convex's Plug-and-Play Components

Learn how Convex Components simplify building ChatGPT-style streaming chat by eliminating WebSocket complexity through plug-and-play, reusable backend modules and React hooks.

Hyo Jang

a year ago

Perspectives

All Perspectives posts

Mike Cann

Introducing Convex Explained

Agents love text and people find walls of text hard work, so I'm trying something in between. Convex Explained is a new home for interactive explainers, starting with Build Your Own Convex.

Jamie Turner

I don't care about your database benchmarks (and neither should you)

Consider this our declaration of permanent disengagement from “bar chart wars.” It’s good dev marketing, but it’s a waste of time.

Jordan Hunt

Lessons from Building an AI App Builder on Convex

Over the past few months, we have built and grown Chef into the only AI app builder that knows backend. But, this process didn’t start with Chef. It started with building the Convex, the database that Chef is built on top of.

All AI posts

08:22

Convex has one big limitation. Daytona fixes it

Convex can't run Python, the Rust compiler or even npm install, which is a bit of a problem when your agents need to run code in the cloud. The folks at Daytona built a Convex component that gives them a throwaway computer to do it in, so I had a play and ended up with three little apps.

Mike Cann

a month ago

06:12

Is your agent writing proper Convex code?

Mike Cann

a month ago

05:40

We made AI on Convex way simpler

You can now make LLM calls directly from Convex actions with no provider accounts or API keys to set up. Here's how Convex's new AI Gateway works, what you can do with it, and the one thing to be careful of when you set a spending limit.

Mike Cann

a month ago

I built my family a giant touchscreen

I built a 40-inch infrared touchscreen as a family home hub, then used Codex and Convex to turn it into a whiteboard, calendar, chores tracker and smart-home dashboard.

Mike Cann

2 months ago

I made 100 programming languages talk to Convex

I spent 32 billion tokens getting agents to build Convex clients in 100 programming languages, from Fortran and COBOL to x86-64 assembly and Verilog. Here's how it went, the rules I set, the languages that didn't make it and what it all cost.

Mike Cann

3 months ago

The bare minimum you need to know about Convex

Your coding agent keeps talking about queries, mutations, actions and components, and you're wondering what on earth any of it means. Here's just enough Convex to understand what your agent is building, give it sensible instructions and notice when it's heading in the wrong direction.

Mike Cann

3 months ago

Claude Code vs Codex: which is best?

A six-run benchmark of Claude Code and Codex building the same app on Convex, Supabase, and Firebase, comparing functional correctness, security, code quality, and cost.

Mike Cann

4 months ago

Exploring the NEW Convex Claude Code Plugin!

A hands-on look at the Convex Claude Code plugin: building a real-time drawing app without mentioning Convex, migrating a Supabase app over, and what's inside the plugin's MCP server and agent.

Mike Cann

5 months ago

How to Use the New Convex Codex Plugin in OpenAI Codex

Build and deploy real-time Convex apps directly from Codex using the official Convex plugin. Covers installation, generating a collaborative drawing app from a single prompt, and migrating an existing app to Convex.

Mike Cann

5 months ago