AI Builder Challenge

Blueberry Projects

Nick

Hi, I'm Nick. I have a hunger for creating.

I'm building 51 minimal projects in 51 days,
before my next role.

Products I'd genuinely find useful or interesting.

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5 / 51 shipped·Ends June 2, 2026
Day 5 · Mar 27 · Shipped 🚢Open

Tinker RFT 🧠 — Improving Qwen4B at Grade School Math by 0.8%

Research

I've been interested in GRPO and RFT for a while — it's often a precise balance, improving one benchmark without making another worse. I ran RFT on Qwen 4B to see what was possible. Result: +0.80% on math, from 89.2% to 90.0%.

Tinker RFT 🧠 — Improving Qwen4B at Grade School Math by 0.8% preview
Day 4 · Mar 26 · Shipped 🚢Open

TubeLLM 🚇 — Offline AI for the London Underground

App & Web App

On the London Tube there's zero signal — so I can't use AI. I built TubeLLM to fix that. Download a local LLM once, then chat with it completely offline. No Wi-Fi, no data, no cloud. Just answers, even underground.

TubeLLM 🚇 — Offline AI for the London Underground preview
Day 3 · Mar 25 · Shipped 🚢Open

ClosedLoop ☕ — Let Claude Code Access Your Browser

Skill.MD & MCP

I was tired of being a screenshotting intern for my AI tools — they couldn't see the page. So I built ClosedLoop: a skill + Chrome extension that gives your agent direct control of a live tab. It navigates, clicks, reads its own errors. Drink coffee, not error logs.

ClosedLoop ☕ — Let Claude Code Access Your Browser preview
Day 2 · Mar 24 · Shipped 🚢Open

Calorie AI 💪 — Log Meals, Hit Macros, Track Streaks

App & Web App

I'm getting married this summer and wanted to show up in shape. So I built my own fitness app — log meals, hit your macros, track streaks. AI-powered calorie tracking and workout planning. No fluff, just what I needed.

Calorie AI 💪 — Log Meals, Hit Macros, Track Streaks preview
Day 1 · Mar 23 · Shipped 🚢Open

Best Olive Oils Ranked 🫒 — Scientifically, Not Sponsored

Website

I'm from Spain and grew up with olive oil. I'm convinced it's one of the healthiest things you could have. This site ranks the absolute best olive oils scientifically. Bryan Johnson says it's the #1 thing he takes.

Best Olive Oils Ranked 🫒 — Scientifically, Not Sponsored preview