SOFTWARE DESIGN / HARDWARE DESIGN
Hard problems,
made to work.
Daisuke Kuriyama — designer of software and hardware. AI agents, multi-robot path planning, performance engineering, measurement systems. The entire design process is published on this site.
- ISUCON13 TVer Award
- League of Robot Runners 2026 — World Top 10
- Rust / Material UI / Zig contributor
- Founder of BreakAI
Fields
Fields of design
Software Design
AI agent architecture, performance engineering for high-traffic systems, and open-source contributions to languages and UI foundations. I design for readability and speed at the same time.
Hardware × Robotics
Multi-agent path finding (MAPF) so hundreds of robots move without collisions, swarm robotics, and autonomous-driving foundations. Algorithms taken all the way from paper to real machines.
Measurement Design
Measure, don't guess. Behavioral instrumentation, A/B testing, and building profilers from scratch. Producing numbers that decisions can rest on is part of design too.
Selected Works
Works
Only what can be public is here. Each piece keeps its design process and numbers intact, as articles.
ROBOTICS
League of Robot Runners 2026
Top 10 in the world championship for multi-agent path finding at the scale of hundreds of robots. Algorithms and process published.
SOFTWARE / OSS
isutools
An all-in-one profiler for Go apps, integrated in one line (OSS / MIT). SQL, HTTP, nginx, and pprof in a single dashboard.
PERFORMANCE
private-isu: 541,650 points
A measurement-driven tuning log taking a web app from 0 to 541,650 in one day — with the numbers behind all ten steps.
PRODUCT
LLMonster
A mobile AI agent that turns the smartphone share button into its entry point.
SECURITY
Gogyo Security
A supply chain security self-assessment service for METI's SCS rating scheme — no signup required.
OSS
Rust / Material UI / Zig
Ongoing contributions to the foundations I use every day, from language compilers to UI libraries.
MEASUREMENT
Behavioral Measurement & Conversion Design
Instrumentation, A/B testing, and reporting design for landing pages — designed to the point where measurement changes decisions.
Writing
Writing
The process, the failures, and the numbers are all published as articles. It is the most reliable way to know how I work.
vda5050-lab — Evidence-Bound Diagnostics for VDA 5050 Temporal Failures
vda5050-lab addresses reconnect and state-transition failures that single-message validation cannot evaluate. This article explains its INCONCLUSIVE evidence model and the isolated 1, 2, 5, 10, 50, and 100-robot MQTT validation suite.
isutools Dev Diary — Building an ISUCON Profiler in a Day with Claude Code and Codex
A development diary of isutools, an ISUCON profiler built in one day. It started as a teammate's everyday SQL logger; lacking the skill and time to extend it by hand, I leaned on Claude Code and Codex, with a design-doc-first, TDD, dogfooding workflow. Includes the honest open questions: am I actually learning, and will any of this matter in a real contest?
isutools — a One-Line All-in-One Profiler for ISUCON
ISUCON measurement usually means juggling alp, pt-query-digest, pprof, and top. isutools is a Go OSS that collects SQL, HTTP, nginx logs, per-process CPU, DB schema, and pprof into one dashboard with a single sqlx.Open rewrite. Overhead measured at -0.58% (within noise). Setup and full feature tour.
8th in the World at League of Robot Runners 2026, as a Team of One
I entered the Combined Track of League of Robot Runners 2026 — the Amazon Robotics-sponsored multi-robot path planning contest — as the one-person team Rovnou, finishing 8th of 68 teams (score 5.55, 134,905 tasks completed). Notes on the lifelong MAPF problem, a planner stack organized by timescale, and an honest breakdown of the gap to first place.
Contact
Excitement, given form.
I want to go deep on work that genuinely matters and genuinely excites. Ideas without a shape yet, hard technical validation, problems with no obvious path to winning — those are the conversations I welcome most.
Email meSoftware design / robotics / AI agents / performance / measurement systems