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

4.9K 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

6 days 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

13 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

8 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

2 years 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

3 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

6 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

6 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

9 months ago