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

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

#13
Impressive. Have you seen any success with Mastra being used to build voice agents? Our company has been experimenting with VAPI, which just launched a workflow builder into open beta (https://docs.vapi.ai/workflows), but it has a lot of rough edges.

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

#14

I thought Kyle Matthews was the creator of Gatsby

Kyle started the project, I started helping pretty shortly thereafter, then he and I cofounded the company together. Kyle's working on ElectricSQL now but is using us, we're doing a meetup together next month, etc.

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

#15

A TypeScript first AI framework is something that has been missing. How do you work with AI SDK?

Mine is written in TypeScript and I still think it's more ergonomic than anything else I'm seeing in the wild. Maybe there's finally an appetite for this stuff and I should release it. The Mastra dashboard looks pretty nice, might take some notes from it.

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

#16
post #10

Congrats on launching. I've noticed that switching prompts without edits between different LLM providers has degradation on performance. I'm wondering if you guys have noticed how developers do these "translations", I'm wondering since maybe your eval framework might have data for best practices.

Yeah, this is something we've heard as well. No particular feature right now but we did ship an agent in local dev to help people improve their prompts.

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

#17

I thought Kyle Matthews was the creator of Gatsby

I put the "creators" bit in the title because I thought readers would find it interesting. Sorry if that was not-quite-right! I've turned them into developers now.

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

#19
post #16
post #10

Congrats on launching. I've noticed that switching prompts without edits between different LLM providers has degradation on performance. I'm wondering if you guys have noticed how developers do these "translations", I'm wondering since maybe your eval framework might have data for best practices.

Yeah, this is something we've heard as well. No particular feature right now but we did ship an agent in local dev to help people improve their prompts.

I'm wondering since there seem to be a lot of frameworks/websites that support evals, even OpenAI has evals.

Do you think that a lot of these components like observability and evals will eventually be consumed by either providers (like OpenAI) or an orchestration framework like Mastra (when using multiple providers, though even if you're using just one provider for many tasks I can see it belonging to the orchestration framework)?

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

#20
post #13

Impressive. Have you seen any success with Mastra being used to build voice agents? Our company has been experimenting with VAPI, which just launched a workflow builder into open beta ( https://docs.vapi.ai/workflows ), but it has a lot of rough edges.

We're just starting to do that and have a few TTS providers: ElevenLabs, OpenAI, PlayAI.

We hear a lot from people who are outgrowing the voice agent platforms and moving to something like pipecat (in Python), and we'd love to be the JS option.

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