🧙‍♂️Juliano Farias

Software Engineer at IKEA | 🇧🇷 living in 🇳🇱 | tweets are my own

[🧙‍♂️Juliano Farias @frontendwizard]

Minha gente, fiz um site aqui pra visualizar os casos de COVID-19 por munícipio: https://t.co/Kwk3GxBZXR
Completamente open source, subindo nos ombros de gigantes como next.js (@zeithq), chakra-ui (do @thesegunadebayo), vx, d3.js entre outros ❤️

[🧙‍♂️Juliano Farias @frontendwizard]

@ebrionesm @xNavalha This is the classic confusion of damage and might. Might is not reduced when the unit has damage on it. A 7 might unit with 6 damage on it is still a 7 might unit.

[Matt Pocock @mattpocockuk]

Making implementation cheaper has made creating bad code cheaper

But it's also made creating good code cheaper

You just need to know the difference

[🧙‍♂️Juliano Farias @frontendwizard]

@mattpocockuk Yes please

[🧙‍♂️Juliano Farias @frontendwizard]

@adamwathan It’s about time we all agree to let go of Claude Code. A harness for developers must be open source, otherwise it serves the provider and not the developer.

[🧙‍♂️Juliano Farias @frontendwizard]

@matheuslf @risaddex Eu diria que sim. Liga no SAC deles no Brasil, quando precisei me atenderam bem rápido

[🧙‍♂️Juliano Farias @frontendwizard]

@risaddex @matheuslf Rapaz, apertado essa conexão. Eu procuraria a companhia aérea só pra ter certeza que ela estão cientes da sua situação. Eu acho que dá, geralmente a staff da própria companhia aérea já te encaminha direto pra conexão.

[Matt Pocock @mattpocockuk]

4 of the most confusing terms in AI, defined:

Model: a blob of parameters, written during training. Does next-token prediction and nothing else. Stateless.

Harness: everything around the model that turns it into an agent: tools, system prompt, context window management, etc.

Environment: the world the agent acts on. Anything outside the harness that the agent perceives and acts on via tools.

Agent: a model, harnessed, in an environment.

---

Opus is a model.

Claude Code and Claude Web are different agents, because their harnesses differ - even though the models are the same.

The file system is an environment. MCP servers add tools to the environment.

[Matt Pocock @mattpocockuk]

Writing code is cheap

Maintaining code is not cheap

Anyone who's hired an external contractor knows this

[🧙‍♂️Juliano Farias @frontendwizard]

@mattpocockuk That’s wild, congratulations!!! You deserve it, you are very much in the right track about coding with agents.

[🧙‍♂️Juliano Farias @frontendwizard]

@mattpocockuk Come to the pi side 💪

[🧙‍♂️Juliano Farias @frontendwizard]

@mattpocockuk I had success by throwing away the prototype and rebuilding it with tracer bullets and using the prototype code as reference to the model. Got a much cleaner version of the app.

[🧙‍♂️Juliano Farias @frontendwizard]

@mattpocockuk Dang it, I was so close, I got 124 questions this weekend 😂

[Matt Pocock @mattpocockuk]

Just shipped Sandcastle 0.4.1.

- OpenCode, Pi, Codex support
- Podman, Daytona, Vercel support

It's becoming the simplest way to run any agent, sandboxed anywhere

[🧙‍♂️Juliano Farias @frontendwizard]

@birdabo Windows

[Cory House @housecor]

Just implemented a feature using GitHub spec-kit.

It's an opinionated workflow for coding via an LLM. I used it with Claude Code, but it works with many different LLMs.

Wow. It does a LOT.

- Creates feature branch
- Generates a high-level plan
- Creates a quickstart doc for trying the feature
- Generates research docs about decisions and alternatives
- Outputs a detailed spec
- Creates a list of tasks based on the spec
- Implements tests first and enforces that they fail (TDD)
- Does the implementation using task list.
- Validates it all works by running linting, build, and tests (it fixed its own minor mistakes at the end too).

It's VERY thorough and organized, and walks you through a highly opinionated development flow.

I told it to create an admin feature for my restaurant app and it generated and implemented these 32 tasks, checking them off as it progressed.

If you're coding with AI assistance, you should absolutely try this. It's a real eye-opener to how far you can take things.

[🧙‍♂️Juliano Farias @frontendwizard]

@o_gabsferreira triste. abandonei completamente, entro uma vez por mes só de curioso mesmo.

[Gabs Ferreira @o_gabsferreira]

Agora é oficial: sou Lead Developer Advocate na @meteorjs ☄️

“Mas pera, MeteorJS ainda existe?”

Não só existe como tá mais vivo do que nunca! Tem versão nova, comunidade engajada e produtos além do framework.

Ansioso pra trabalhar com open source e por tudo que vem aí ❤️

[Remix 💿 @remix_run]

We have an announcement

https://t.co/WBG18EsLvG

[Laura Beatris @lauradotjs]

I couldn't be happier today - we're entering a world without forwardRef ✨

[Andrew Clark @acdlite]

React 19: Never forwardRef again