Yohei Nakajima — Build Log

Yohei Nakajima — Build Log Public builds, experiments, software, and research. https://yohei.me/ 2026-07-22T01:44:01Z Yohei Nakajimahttps://yohei.me/ The Shared Discovery Paradox https://x.com/yoheinakajima/status/2079567881889796456 2026-07-21T00:00:00Z2026-07-21T00:00:00Z

A mathematical explanation of how information sharing without action coordination can worsen group outcomes.

Regimeshttps://x.com/yoheinakajima/status/20648308911433810762026-06-10T00:00:00Z2026-06-10T00:00:00Z

An auditable, held-out-gated self-improvement loop demonstrated on LongMemEval.

AG Coderhttps://x.com/yoheinakajima/status/2064026650988495279#ag-coder2026-06-08T00:00:00Z2026-06-08T00:00:00Z

An open-source reference coding agent built on ActiveGraph.

Learn ActiveGraphhttps://x.com/yoheinakajima/status/2064026650988495279#learn2026-06-08T00:00:00Z2026-06-08T00:00:00Z

An interactive site for learning ActiveGraph concepts through hands-on examples.

ActiveGraph LongMemEval Experimentshttps://x.com/yoheinakajima/status/20614786919522714522026-06-01T00:00:00Z2026-06-01T00:00:00Z

Experiments comparing deterministic, semantic, and hybrid architectures for auditable agent memory.

The Log Is the Agenthttps://x.com/yoheinakajima/status/20578127130453770552026-05-22T00:00:00Z2026-05-22T00:00:00Z

An arXiv paper introducing event-sourced reactive graphs for auditable and forkable agentic systems.

ActiveGraphhttps://x.com/yoheinakajima/status/20570992454302229262026-05-20T00:00:00Z2026-05-20T00:00:00Z

An event-sourced reactive graph runtime for auditable, forkable, long-running agents.

BabyAGI Wikihttps://x.com/yoheinakajima/status/20346699221740299002026-03-19T00:00:00Z2026-03-19T00:00:00Z

A technical history comparing nine iterations of BabyAGI across three years.

Pitch Yoheihttps://x.com/yoheinakajima/status/20320965642616342232026-03-12T00:00:00Z2026-03-12T00:00:00Z

A live AI pitch agent that interviews founders and VCs and extracts structured startup data.

Ode to Claude Codehttps://x.com/yoheinakajima/status/20219632414136527952026-02-12T00:00:00Z2026-02-12T00:00:00Z

An AI-generated sea shanty for Claude Code lovers.

BabyAGI 3https://x.com/yoheinakajima/status/20200270371809323472026-02-06T00:00:00Z2026-02-06T00:00:00Z

A minimal autonomous assistant.

K.I.S.S.https://x.com/yoheinakajima/status/20111670143297290702026-01-13T00:00:00Z2026-01-13T00:00:00Z

A daily prompting game.