Alex Booker

Building @Mastra - teaching you how to build agents along the way

[Alex Booker @bookercodes]

Stoked to announce Mastra Observability - hosted observability for Mastra agents 🔥

Export high-volume traces and logs

Monitor cost and performance, search and filter every run

Then use Studio to turn production behavior into evals, datasets, and experiments

[Alex Booker @bookercodes]

@HelloFabrik @mastra Excellent! What was your use case for ACP?

[Alex Booker @bookercodes]

@blackgirlbytes Mastra is hosting TypeScript AI Conference on €¡¡July 23 if you want to come!

[Alex Booker @bookercodes]

@marlene_zw Hey Marlene! Sent you a DM here on X - can you check? I have almost to zero confidence X delivered the chat notification properly 😂

[Alex Booker @bookercodes]

The Mastra server is a fundamentally Hono server

So you can add middleware

Here's a handy one I've been using lately to log the current user's role

Handy when debugging auth

[Sam Bhagwat @calcsam]

We're launching Agent Builder, your internal agent platform:

- Devs write tools, select models, build workflows
- Non-dev teammates assemble into agents (or vibe code), chat, publish
- Includes RBAC, ownership, and visibility controls
- Under the hood everything's Mastra agents

[Naval @naval]

New podcast, new format. Three founders join us.

Waste Tokens, Save Time

00:00 Three Frontier Founders

01:27 AI Software Factories

04:15 Waste Tokens, Save Time

05:47 Models Instructing Humans

09:30 Is Pure Software Dead?

12:04 You Don't Get Stuck Anymore

With @rauchg, @maxhodak_, and @bscholl.

[Alex Booker @bookercodes]

@johnyeo_ Yes John!

[Alex Booker @bookercodes]

In Mastra too 😉

[Pedro Duarte @peduarte]

if you havent yet announced that opus 4.8 is available* in your product youre unfortunately ngmi

it was released 1hr ago, what are you even doing

*available in raycast

[Alex Booker @bookercodes]

🔴 Live with @wardpeet, Mastra head of open source, teaching you all about A2A and ACP https://t.co/AfM3hSarpn

[Naval @naval]

Software went from desktop-first to mobile-first, now going to agent-first.

[Alex Booker @bookercodes]

@fmerian I learned at Clerk how the small design details add up in a big way

[Alex Booker @bookercodes]

Clean cursor tracking effect detail 😮‍💨

[Sam Bhagwat @calcsam]

https://t.co/zqfZZAMDX9

[Alex Booker @bookercodes]

@wesbos @nikitabier It's so bad

[Alex Booker @bookercodes]

https://t.co/yYiGjMF0nh

[Alex Booker @bookercodes]

Agents and Money is special

I was lucky enough to speak at the inaugural event in SF, and now in London

I'll be talking about

- prompt caching
- right-sizing models
-and how to keep a runaway agent from breaking the bank with guardrails

Register below

[Alex Booker @bookercodes]

@aurorascharff @OpenAIDevs Clean!

[Alex Booker @bookercodes]

@samcmkt @hqmank @thsottiaux Yes please! There are many situations where prompting the change is much less efficient than making the change directly especially for everyday work e.g. fixing typos or reordering sections

[Alex Booker @bookercodes]

@mattpocockuk Yes!

[Paul @PaulieScanlon]

🤖 Run Claude code from a @mastra agent using ACP (Agent Client Protocol)

More on this next week.