How I work with agents in 2026
How I work with agents on Peak Health: from Matt Pocock's skills to materialize and back, HTML prototypes before I ask for anything, and a queue that builds the issues and merges its own PRs.
Hi, I'm Erik.
I'm a software engineer in Barcelona. I write about software engineering, health and training, the races I run, and the life in between.
By day I write code. Right now I'm also studying to become a personal trainer, so expect notes from that course alongside the code.
Want to read what I write?
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More about meLatest posts
Long-form notes on building software, training, food and the rest of life.
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What makes a React component render again when you use useState, useEffect or a context, how to find the renders you don't need, and what changes with React Compiler.
WebMCP: the web learns to talk to agents
First, websites added their own AI assistants. Then agents learned to use the browser by guessing. WebMCP lets the app you already use tell your AI what it can do.
Training & races
My races, road and trail, and how much I've been training lately, from my UTMB profile, race results and Strava.
Race log and records
- 534
- Half PB
- 1:36:40
- Races finished
- 17
536
10K PB 46:30
10 trail · 7 road
Latest race
Eiger Ultra Trail by UTMB
E35 North Face Trail · Grindelwald, Switzerland
- Distance
- 35 km
- Time
- 6:07:06
- Position
- 185 of 639
Next race
Cursa de l'Alba
Collbató, Spain
- Distance
- 22 km
- Days to go
- Today
Since Eiger Ultra Trail by UTMB
Studying to be a personal trainer
I'm taking Fit Generation's personal trainer course. What I learn about training and health will show up here.
Projects
What I'm building right now.
Peak Health
Strength workout logger
You plan each routine on the web and log each workout on your phone. Peak Health keeps sections, each side, rest and effort as you trained them.
- Warm-up, main work and cool-down as separate sections
- Left and right logged separately
- A rest timer that starts when you log a set
- Rating of perceived exertion (RPE) on every set
Pulso
AI coaching app
Carlos, an AI head coach, reads your watch, your gym log and your lab tests, asks how you feel each morning and plans your week around your life. Then he puts it in the apps you already train with.
pulsocoach.com
Say hello.
If something here is useful, or wrong, or you just want to talk about code or trail running, write to me. I read everything.
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