Butter

lightweight local sandboxes for AI agents (YC W25) - now at @modal!

[Modal @modal]

We're excited to announce that @ButterDev_ is joining Modal to help us continue to build the best sandbox infrastructure.

Welcome to the team! 💚🧈

[Erik Dunteman @erikdunteman]

Some exciting news to share:

Butter is joining Modal!

Infra is having a moment. Agents need new patterns, new primitives. And importantly, scale like we've never seen before.

There is no better team in the world to build this than Modal. It's an honor to join.

[Erik Dunteman @erikdunteman]

Launching today @ButterDev_:

Automatic Template Induction

Agent workflows are full of dynamic templated data. Butter's LLM response cache now automatically detects dynamic variables, allowing a single agent trajectory to generalize into a reusable deterministic workflow.

[Erik Dunteman @erikdunteman]

The agent codebase at Butter has transitioned to full Typescript!

Here's our current stack:
- @bunjavascript for runtime & tests
- @e2b for TS sandboxing
- @braintrust for evals
- @vercel_dev AI SDK for structured generation
- @ButterDev_ for caching tests and evals

[Erik Dunteman @erikdunteman]

Gramma's misplaced her cookbook, and it's Thanksgiving day!

Submit your favorite recipes and help us save the holidays:

https://t.co/Hbl9xHb1Oi

[Erik Dunteman @erikdunteman]

Happy Friday y'all

This week we launched (again) on HN, got some great feedback, and spent time improving the first user experience:

https://t.co/bUp9GKFrU0

[Erik Dunteman @erikdunteman]

After so many launches this last month in "deterministic" agents, all with different definitions of what that even means, and it was due time for someone to wrangle them together.

I present to you:
https://t.co/9oPJTzyI7u

[Erik Dunteman @erikdunteman]

Butter Changelog #0002
- 8.9x speedup on cache-hit p50s (fast)
- We're hiring a Systems Eng (make it faster)

https://t.co/o6g4k1Ri7H

[Erik Dunteman @erikdunteman]

The first of many changelogs.

In the time since launch we've been working on increasing compatibility to popular agent frameworks, examples and demos coming soon...

https://t.co/hiruDDURNI

[Butter @ButterDev_]

@kwindla @ptsi oink!

(me too)

[Butter @ButterDev_]

@entreprenik @ycombinator @erikdunteman 🐽

[Butter @ButterDev_]

@ycombinator @erikdunteman Oink!

[Y Combinator @ycombinator]

🐷@PigDev_ is an API to operate Windows Apps with AI, making it easy to automate legacy applications across healthcare, manufacturing, finance, and more. It's like Operator, for Windows.

https://t.co/cUOcYh2mA4

Congrats on the launch, @erikdunteman!

[Martin Bowling @martinbowling]

Had a great on boarding experience for @PigDev_ with @erikdunteman today. Can't wait to build some exciting stuff, if you have a need for giving your Agents a windows desktop this is THE way to go, super easy to get a new VM spun up and connected to an agent

[Butter @ButterDev_]

@HomelanderBrown Nobody asks "how's pig" 😢

[Butter @ButterDev_]

Hello World!

[Erik Dunteman @erikdunteman]

Announcing @PigDev_

Windows Desktops for Agents

[Butter @ButterDev_]

soon my friends