Show HN: Mastra – Open-source JS agent framework, by the developers of Gatsby

Post by CharlieDigital » Thu, Feb 20, 2025, 12:06 AM UTC

cpursley wrote: post #88

_pdp_ wrote: post #85

I don't want to be that person but there are hundreds of other similar frameworks doing more or less the same thing. Do you know why? Because writing a framework that orchestrates a number of tools with a model is the easy part. In fact, most of the time you don't even need a framework. All of these framework focus on the trivial and you can tell that simply by browsing the examples section. This is like 5% of the wo…

I agree, and it feels like JS is just the wrong runtime for agents. Really languages that can model state in sane ways and have a good concurrency story like Elixir make much more sense. And here’s a fun exercise: ask Claude via Cursor or Perplexity with R1 to create a basic agentic framework for you in your language of choice on top of Instructor.

    > Really languages that can model state in sane ways and have a good concurrency story like Elixir make much more sense.

Post by [deleted] » Thu, Feb 20, 2025, 12:54 AM UTC

Post by leerob » Thu, Feb 20, 2025, 1:58 AM UTC

tomhallett wrote: post #98

calcsam wrote: post #66

Earlier quoted context omitted.

It’s not. It’s on top of AI SDK, which is a popular open source library maintained by Vercel.

So the vercel ai js-sdk is not tied to the vercel platform and is “just” a js library which points to various llms? Is there any promise/plan/etc to keep it that way?

Post by mvf4z7 » Thu, Feb 20, 2025, 2:29 AM UTC

cpursley wrote: post #90

kylemathews wrote: post #31

Very excited about Mastra! We have a number of Agent-ic things we'll be building at ElectricSQL and Mastra looks like a breath of fresh air. Also the team is top-notch — Sam was my co-founder at Gatsby and I worked closely with Shane and Abhi and I have a ton of confidence in their product & engineering abilities.

Why not use Elixir for agents as Electric is already heavily invested? It’s a much better fit than JS.

Post by mikehostetler » Thu, Feb 20, 2025, 2:42 AM UTC

cpursley wrote: post #88

_pdp_ wrote: post #85

I don't want to be that person but there are hundreds of other similar frameworks doing more or less the same thing. Do you know why? Because writing a framework that orchestrates a number of tools with a model is the easy part. In fact, most of the time you don't even need a framework. All of these framework focus on the trivial and you can tell that simply by browsing the examples section. This is like 5% of the wo…

I agree, and it feels like JS is just the wrong runtime for agents. Really languages that can model state in sane ways and have a good concurrency story like Elixir make much more sense. And here’s a fun exercise: ask Claude via Cursor or Perplexity with R1 to create a basic agentic framework for you in your language of choice on top of Instructor.