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Sam Bhagwat
@calcsam
building @mastra. author principles of building ai agents, the "most popular book in SF right now". prev cofounder @gatsbyjs
3K Following    17.5K Followers
Excited to ship experiment mocks! Mock results for actions like refunding a payment or sending an email, so experiments never touch live APIs:
In the 72 hours after Jev dropped, we shipped a workflows classifier, tool approval classifier checks, classifier as judge scorers, and a classifier as a processor. Thinking about a model router too. Come hang out and chat w/ us about it on Th:
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Today we're excited to launch experiment lifecycle hooks! Set up and tear down sandboxes, databases, and other fixtures using 𝚋𝚎𝚏𝚘𝚛𝚎𝙰𝚕𝚕, 𝚋𝚎𝚏𝚘𝚛𝚎𝙴𝚊𝚌𝚑, 𝚊𝚏𝚝𝚎𝚛𝙴𝚊𝚌𝚑, 𝚊𝚏𝚝𝚎𝚛𝙰𝚕𝚕:
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Today we're excited to launch experiment targets! Run experiments on workflows or on the scorer itself:
Listen along with the Mastra team:
@calcsam @mastra My experience with Mastra continues. The best TypeScript-based ecosystem for reliable delivery of agentic applications. Personally, the best part is memory management. Just switch it on, and all is working. With MAF, I need to write a lot of features that Mastra already has.
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The more I learn about @mastra the more impressed I am by what you can build with it Mastra makes it surprisingly easy to build AI agents without writing a single line of code. I tried it myself and was able to build a small team of marketing agents using just its built-in tools
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Take a look at this agent framework comparison from our friends at @daytonaio:
Over the past year I've built integrations between Daytona and most major AI agent frameworks. Picked 7 on adoption, maturity and production use. They cover similar ground on features, then diverge on durability, isolation and control flow.
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Muse Spark 1.3 from @Meta tops the charts in our Browser Agent benchmarks using the @mastra agent harness. In this harness, Muse outperforms Opus 5 in cost, speed, and accuracy.
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To serve their 15,000 accounting customers, Translucent built an accounting factory. An agent with 70 tools does the accounting work with skills, sandboxes, and a human in the loop:
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Open source is a powerful form of generosity. “Generosity breeds luck” is one of Mastra’s values. It’s a direct quote from @bradflora during our group office hours
Making Startups Powerful:
We used Mastra's framework to build Rai, our AI wealth advisor. Today, our members can get instant, hyper-personalized, fiduciary advice whenever they need it. Watch Range Chief AI Architect & Co-founder David Cusatis break down how we did it. 👇
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Range is an SEC-registered investment adviser serving more than 4,000 member households with over $17 billion AUA. They recently raised a $60M Series C from Scale. Here's how they power their advisor service with 15+ Mastra agents:
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@arithecfo @blader I spent ~20 hours making charts on this stuff last year and you just....released it
@arithecfo i want to model revenue of open source javascript framework companies like Vercel, Supabase, Prisma, etc based on the downloads of the underlying open source project. specifically I would like your estimate of what a weekly npm download is worth in ARR. You can find historical download statistics going back to 2015 at
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Powered by Mastra
introducing ═══════════ 𝚌𝚏𝚘.𝚊𝚒 ═════════════ tl;dr 1/ runway is now 2/ you can hire @arithecfo and he can start TODAY 3/ you can give @arithecfo a test drive by replying to this thread with any ridiculous thing you want him to model for you, and he'll come back to you with a beautiful, detailed, fully wired financial model ... in 30 minutes or less now, story time: 🧵 1/n
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We launched Mastra Factory yesterday. It connects GitHub, Linear, and Slack to configurable boards. For us, that's Intake → Triage → Planning → Build → Review → Done, but you can configure your own. 𝚗𝚙𝚖 𝚌𝚛𝚎𝚊𝚝𝚎 𝚏𝚊𝚌𝚝𝚘𝚛𝚢
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This was pretty incredible to be part of. Thanks everyone who helped yesterday. We really couldn't have done it without you.
We are #1# on Product Hunt today, over OpenAI and Meta:
We just shipped a new example Mastra template for security incident triage! Build agents into your infra:
Today, I want to share the new template for @mastra - Security Incident Triage and Response! An agent workflow receives security alerts, gathers evidence, processes the information, and recommends a containment action based on your runbooks -
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The pace and quality at which the @mastra team ships needs to be studied. Pumped to try out factories.