devtools.fm: Developer Tools, Open Source, Software Development

This week we're joined by Boris Tane, founder of Polylane and previously founder of Baselime, the observability startup Cloudflare acquired in 2024, where he went on to lead Workers observability. Polylane builds a live topology map across your cloud, observability tools, and repos so an agent can detect, investigate, and fix production issues before anyone gets paged. We talk about why bolted-on AI tools fail for on-call, how Polylane's memory systems work, using trajectory analysis to vet pull requests before they merge, and what happens to the on-call rotation as agents write more of our code.

• https://polylane.com
• https://boristane.com
• https://x.com/boristane
• https://boristane.com/blog/on-call-is-now-theatre/
• https://www.cloudflare.com/press/press-releases/2024/cloudflare-enters-observability-market-with-acquisition-baselime/
• https://www.openstatus.dev

00:00:00 Introduction
00:01:07 Boris's Path from Aerospace
00:06:44 Scale and Agents at Cloudflare
00:13:09 Why Bolt-On Tools Fail
00:17:15 Ad
00:18:19 Onboarding and Topology Discovery
00:21:20 Memory Systems for Agents
00:27:19 Trajectory Analysis for Pull Requests
00:33:06 Auto-Merging and Review Trust
00:38:51 Preview Environments and Feature Flags
00:44:58 Status Pages and External Outages
00:47:35 The Future of On-Call Work
00:51:13 Uneven Future and Wrap-Up

Full show notes and transcript: https://devtools.fm/episode/179

This week we're joined by Bobby Grayson, a longtime Elixir developer and the creator of Deciduous, a decision graph that gives LLMs a living memory.Deciduous stores goals, options, and outcomes in a SQLite-backed graph that agents like Claude Code can query as they work, so they remember why decisions were made instead of repeating past mistakes.We talk about how it slots invisibly into an agent workflow, how teams share decision graphs, the surprising authors using it to organize their books, and where coding is headed in the next five years.

• https://deciduous.dev
• https://github.com/notactuallytreyanastasio/deciduous
• https://github.com/notactuallytreyanastasio/shoehorn
• https://cure-lang.org
• https://www.destroyallsoftware.com/talks/the-birth-and-death-of-javascript

This week we're joined by Scott Lanoue, the creator of CoMail, a cooperative email service built on the AT Protocol.Getting a self-hosted mail server to actually land in the inbox is a months-long slog of warming IPs and building domain reputation, so CoMail pools that reputation across everyone sending through a shared relay.

We talk about how atproto identity lets CoMail vend out trust instead of spam scores, what it means to store your mail in your own PDS with spaces, and why a co-op might be a better shape than a startup for a protocol with no moats.

• https://comail.at/
• https://scottlanoue.com/
• https://bsky.app/profile/scottlanoue.com
• https://tangled.org/scottlanoue.com/atmosphere-mail

This week we're joined by Jacob Miller, founder of DiffUI, an AI-driven UI design tool. DiffUi uses diffusion models to generate UI designs, and then uses a large language model to convert the designs to code. Jacob is a design systems expert and has a lot of experience with design systems, and that's baked right into the product.

• https://x.com/pwnies
• https://diffui.ai

This week we're joined by Jacob Beckerman, the founder and CEO of Macro. Macro is a tool to cut through the noise. It's a workspace built for engineers. And it's one place for all your emails, your tasks, your chat, and your documents. We talk about the creation of Macro, and the future of the company.

• Macro: https://macro.com
• Docs: https://docs.macro.com
• GitHub: https://github.com/jbecke
• X: https://x.com/j_becke
• LinkedIn: https://linkedin.com/in/jbecke

This week we're joined by Rita Kozlov and Steve Faulkner, the co-founders of Cloudflare. The big news of the day is that Cloudflare has acquired Vite. This is a big deal for the JavaScript ecosystem and for the future of developer tools. We talk about the acquisition and what it means for Cloudflare and project.

• https://www.cloudflare.com/
• https://workers.cloudflare.com/
• https://blog.cloudflare.com/
• https://x.com/rita3ko

This week we're joined by Jeff Dickey, the creator of HK, Fnox, Aube, and Mise.We talk about the creation of these tools and what led him to work on them full time with his new company, en.dev.After that we dive into the future of these tools and what's next for Jeff.

• Previous episode: https://www.devtools.fm/episode/129

• https://jdx.dev/

• https://en.dev/

• https://github.com/jdx

• https://jdx.dev/posts/2026-04-17-going-full-time-on-open-source/

• https://github.com/endevco/aube

• https://github.com/jdx/hk

• https://github.com/jdx/fnox

This week we're joined by Sam Goodwin, the creator of Alchemy. Alchemy is a tool that allows you to create and manage your infrastructure as code. The current state of the art is built on all the tech debt of the past 10 years, Alchemy is a new approach to infrastructure as code that is more aligned with the modern web.

• https://v2.alchemy.run/
• https://github.com/alchemy-run/alchemy-effect
• https://github.com/alchemy-run/distilled
• https://alchemy.run (v1)

This week we're joined by Elio Struyf, the creator of Front Matter CMS and Demo Time.We talk about the origins of Front Matter CMS, the challenges of building a CMS, and the future of CMSs.We also dive into Demo Time, and how it can be used to create perfect demos for talks and presentations.

• GitHub: github.com/estruyf
• Website: eliostruyf.com
• Bluesky: @eliostruyf.com

This week we're joined by Alem Tuzlak, the creator of Tanstack Dev Tools and maintainer of Tanstack AI. We talk about the creation of Tanstack Dev Tools and what led him to work on it. After that we dive into Tanstack AI and how it differs from other AI libraries.

• GitHub https://github.com/AlemTuzlak
• Bluesky https://bsky.app/profile/alem.forge42.dev
• LinkedIn https://www.linkedin.com/in/alem-tuzlak/
• YouTube https://www.youtube.com/@alemtuzlak
• TanStack AI https://tanstack.com/ai/latest
• TanStack Devtools https://tanstack.com/devtools/latest