Dreamer: the Personal Agent OS — David Singleton

March 20, 2026

AI Summary

5 min read

Dreamer is a consumer-facing platform for discovering, building, and using AI agents, launched in beta by David Singleton, former Stripe CTO and early Android contributor. Drawing parallels to Android's ecosystem challenges, Singleton and co-founders Hugo Barrett and Nicholas Czechkov designed it as a "personal agent OS" to make agentic apps accessible to non-technical users, like Singleton's sister, while enabling engineers to contribute tools and apps.

Core Architecture and Sidekick

At Dreamer's heart is the Sidekick, a customizable personal agent that acts as both daily companion and system kernel. It learns user preferences through conversation, maintains memory (evolved from vector DBs and knowledge graphs to a simpler system), and orchestrates all activity. Agents and apps cannot interact directly; they route through Sidekick, enforcing user permissions for tools and data access to ensure privacy and alignment.

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What you'll learn

1 (00:05) **Intro and Dreamer Overview** - David introduces Dreamer as a consumer platform for discovering, building, and using AI agents via personal sidekick
2 (01:54) **Demo: Homepage and Dashboard** - Walkthrough of onboarding, personalized feed, widgets like Calendar Hero for meeting prep
3 (04:52) **Gallery and Use Cases** - Community-built agents for productivity, info management, AI news monitoring
4 (06:21) **Tools Layer** - High-quality integrations like Google Search, Gmail, live sports data (F1, MLB, NFL)
5 (09:43) **Agent Studio Demo: Conference App** - Builds AI Engineer conference scheduler using LLM.txt/JSON data in 25 minutes
6 (13:27) **Building Process** - Sidekick plans, builds, tests agents; translates logs to English
7 (15:40) **Hosting and Sharing** - Platform hosts everything (DB, API keys, LLMs); share with friends/teams

+ Full timestamped outline available in the app

Show Notes

For a limited time, Latent Spacenauts can skip the waitline to join Dreamer and also compete for a $10,000 cash prize for most useful tools for Dreamer! Thanks @dps!

In 2024, David Singleton left Stripe and joined forces with Hugo Barra for a buzzy stealth startup named /dev/agents. This month they emerged out as Dreamer, a consumer-first platform to discover, build, and use AI agents and agentic apps, centered on a personal “Sidekick” that helps users customize experiences via natural language.

Sidekick is nothing less than an “agent that builds agents”, with all the complexity that that entails:

You’ve seen many many website builder, app builder, and even agent builder startups by now, but our favorite detail is the sheer amount of work that has gone into the “full stack” nature of the platform, including shipping their own SDK, logging, database, prompt management, serverless functions, and so on. Most platforms restrict the tech stack you can use just to get off the ground — Dreamer does it “right” by letting you push whatever arbitrary code you want to their VMs.

Paying the Builders

Of course former leaders of Stripe and Android would not stop at just building the tools, but also building the ecosystem. Dreamer is deeply aware of the 4 sided network effect it has going on and is ready to fund all of it - from hiring Builders in Residence to awarding $10,000 cash prizes to the best tool builders for the Dreamer ecosystem.

It’s time to Dream!

Full Video Episode

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Transcript

[00:00:00] Meet Dreamer Purple

[00:00:00] swyx: Okay, we’re here in the studio with David Singleton. Welcome.

[00:00:08] David Singleton: Hey, Wix. It’s great to be here.

[00:00:09] swyx: It’s great to have you. Uh, we have very sympa that your company color is the same as Lean Spaces color.

[00:00:15] David Singleton: That’s right. Dreamer Purple.

[00:00:17] swyx: It used to be Devrel agents, which I thought was very cool. It’s like you call back to Devrel Payments.

[00:00:22] David Singleton: Yeah.

[00:00:22] swyx: And you were obviously CTO Stripe. And talk to me about just the origin or thinking process behind Dreamer. Yeah. And maybe, maybe start with like, what, what is