Building a framework for AI called BAML. (YC W23). @BoundaryML
Joined August 2011
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17 Sep 2025
We are hiring Rust devs to work on building out a programming language (BAML) with crazy new, useful features for making AI pipelines.
Our entire team is senior engineers.
We are a team of 5.
We work hard and in person in Seattle.
We accept new grads.
The interview is not leetcode, but a 1-week work trial.
Send me a DM on X or LinkedIn or email aaron @ boundaryml dot com if interested.
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Aaron Villalpando retweeted
Jun 12
BAML is now an official language on @github with syntax highlighting.
We made the sheep instantly recognizable 🐑🚀
Congrats @boundaryML
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Jun 11
AI slop phrases from Claude:
- ceremony
- load-bearing
- not x, not y, not z
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Aaron Villalpando retweeted
May 29
At @boundaryML We're building building a full compiler, VM and async runtime.
Kinda like TypeScript V8 Node.
i wonder about people who are claudemaxxing/codexmaxxing 18 hours a day, like what are these folks building exactly?
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May 28
Could someone try rewriting TS in Go with Claude workflows please
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May 19
We are launching a programming language built for agents soon called BAML that has been in the making for 1 years. You can follow @boundaryML
We are a small team of 6 developing it with care, gathering feedback from humans and agents.
Fully Open Source.
If you are interested DM me for early alpha access.
May 15
Introducing Zero
The programming language for agents.
I wanted a systems language that was faster, smaller, and easier for agents to use and repair.
Explicit capabilities. JSON diagnostics. Typed safe fixes.
Made for agents on day zero.
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Aaron Villalpando retweeted
May 12
Imagine if v8 was tied to the visualization, and you could watch your code execute. or click on teh graph and jump to that line of code.
Or don't imagine and try this early beta in BAML.
May 11
Ask Claude to document and describe the main flows in your app and output in a single page html json data file.
Incredibly useful for humans and the JSON file is very useful for explaining the flow to the LLM when working on new features/bugfixes.
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May 7
Design is the bottleneck now, so we have a Kanban exclusively for more large-scale design docs (in our case it's language proposals).
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Apr 14
added full type signatures to llm functions to our dashboard. works with any input/output type.
imagine querying dashboard.get<MyFunction>(last=5) with a full a typesafe client that works across diff versions of your function. Agents are gonna love this.
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Apr 8
sorry we cant release BAML 1.0 yet, it's too powerful for the general public
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Apr 8
is it just me or might tanstack be doing way too much
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Aaron Villalpando retweeted
Mar 26
Announcing the BAML Bounty...
For all power-users of BAML, we're giving away free BAML merch! (t-shirts, stickers, hoodies 🔥🧯).
Share what you built with BAML with #baml → Fill out tally.so/r/PdErze → Free merch!
Hurry! Supplies are limited to the first 50 posts.
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Mar 16
one is called autoresearch, the other one is called GEPA
Mar 15
It’s quite unfortunate that GEPA Optimize Anything didn’t get enough traction, while very, very similar ideas promoted by Karpathy’s autoresearch Lütke’s pi-autoresearch - got so much traction, despite being less general
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Mar 4
your senior distinguished principal software engineers know as much about vibe coding as the SDE2 vibe coding on side projects.
This stuff is all new. It's ~1 year old
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