Matthew

i write the bugs — new dad, learning to build one-handed

[Matthew @mtt]

@AnthropicAI @claudeai please don’t use my context window for upsells

[Matthew @mtt]

Self-hosting a NixOS VM on a Proxmox host which hosts a dozen homelab services from the *arr stack to grafana to macOS VMs.

All infrastructure is declared with Terraform and Ansible.

I reach into the homelab VLANs with @Tailscale and have Claude Code running around the clock

[Matthew @mtt]

@bcherny @benswerd @bcherny I’ve been dealing with this bug for 6 weeks. Can you give us a rundown on why this was happening?

[Matthew @mtt]

Spent last night grepping xAI's new Grok Build CLI!

Thankfully, every system prompt is a plain string constant! Build includes subagents, memory consolidation, plan mode, loop detection.

Happy to see the progress @xai

https://t.co/y4jLGl7DXq

[Matthew @mtt]

@GergelyOrosz Definitely up next will be package registries (npm, PyPI, Docker Hub). Agents iterate, retry, and re-pull aggressively, and ephemeral sandboxes amplify it.

[Matthew @mtt]

@BrendanCarrFCC @NASAAdmin lil mayo ❤️

[Matthew @mtt]

Built a spacecraft computer simulator from scratch!

Bare-metal C on ARM Cortex-M3, FreeRTOS task scheduling, and NASA's delay-tolerant networking stack, all running in QEMU and Docker.

No hardware required.

https://t.co/bLAiBManni

[Matthew @mtt]

@feross @amasad doesn't seem realistic to expect people to review their code when more and more of it is being generated blindly.. seems like we need good containerization defaults for dev work across the industry.

[Matthew @mtt]

@swyx @dillon_mulroy @badlogicgames know how you can edit previous messages? Think about if you could edit any unit of the chat. Reverting a tool call e.g.

[Matthew @mtt]

I added an agent to my CI pipeline that screenshots every UI state across three viewports on every PR push. Zero manual testing. Here's how it works

https://t.co/gIBd7luCnn

[Matthew @mtt]

@Scobleizer @digijordan What would you recommend reading @Scobleizer

[Matthew @mtt]

@FujiExpo Pls document your process

[Matthew @mtt]

My blog links showed up as plain text on Twitter. No preview image. Just a naked URL.

14 minutes with Claude → every post now gets an OG image automatically.

Playwright screenshots the post. GitHub Actions commits the image. Zero manual work.

https://t.co/eXHFdXB6CO

[Matthew @mtt]

@Anthropic https://t.co/a4OkbrEQiz

[Matthew @mtt]

My QA engineer is an LLM.

Claude clicks buttons, resizes viewports, toggles dark mode, and screenshots everything. When it finds a bug, it fixes the code and re-tests.

Every PR now comes with proof that it works.

[Matthew @mtt]

Setup is 5 lines of JSON:

{
"mcpServers": {
"playwright": {
"command": "npx",
"args": ["@anthropic-ai/mcp-server-playwright", "--headless"]
}
}
}

GitHub issues become living test reports—anyone reviewing the PR sees exactly what was tested.

[Matthew @mtt]

Newsletter SaaS: $10-30/month, features I don't need, data I don't own

Claude + Cloudflare Worker: 30 minutes, 42 lines of code, subscribers sync to my GitHub repo nightly

Shipped in 30 min instead of spending hours comparing SaaS options.

https://t.co/Icd0AxylUc

[Matthew @mtt]

@trq212 @bcherny 12 likes is crazy for something that I live in more than my shell

[Matthew @mtt]

@omarsar0 Thanks for the shout out! Happy to answer any questions