About

I build developer tools. Most of my recent work has gone into making agentic coding workflows cheaper and less noisy — which in practice means Rust, a lot of CLI plumbing, and measuring things people usually guess at.

The throughline is that I'd rather remove a cost than add a layer.

#What I work on

• Developer tooling. Command-line tools that take friction away instead of adding another abstraction. RTK is the current one: it filters command output before a model ever pays for it.
• Applied AI. The practical questions — cost, context budgets, and where models genuinely help versus where they just look impressive.

I write up the things that surprised me in Writing. The posts go deeper than the READMEs, and I try to include what I got wrong.

#Elsewhere

Code on GitHub, work history on LinkedIn, longer essays on Medium, and shorter thoughts on X.

The fastest way to reach me is email: thyago@sphr.world.