Yohei Nakajima

Yohei Nakajima

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VC by day @untappedvc, builder by night: @babyagi_, @pippinlovesyou @pixelbeastsnft. Build-in-public log: https://t.co/UdHHGbZba5

Single Core .md File Streamlines Agent Context Organization
SocialJan 22, 2026

Single Core .md File Streamlines Agent Context Organization

we need an agents .md for everything coding agents got better when we collectively decided on a design pattern: point the coding agent to a single md file they got even better when we started organizing multiple md files, stemming from our...

By Yohei Nakajima
AI Learns Transferable Skills Through Simple Video Games
SocialJan 21, 2026

AI Learns Transferable Skills Through Simple Video Games

can you learn generalizable skills playing video games? can AI? great article from @antimlabs on their experiments training AI by having them play flappy birds, snake, and more.

By Yohei Nakajima
Crafting the Shortest
SocialJan 21, 2026

Crafting the Shortest

random thoughts on building this prompting game... one challenge is that every challenge so far has been solved in 1-3 characters. since i was using the same model to generate AND guess the random phrase, it was REALLY good at...

By Yohei Nakajima
FlyMy_AI Offers Fast, Low‑cost Image Generation
SocialJan 20, 2026

FlyMy_AI Offers Fast, Low‑cost Image Generation

Fastest/cheapest inference for image generation? @FlyMy_AI gets added to @ArtificialAnlys /image as a provider, check out their speed vs cost running Qwen https://t.co/bIWEXQxuC1

By Yohei Nakajima
Shifting Focus: Exploring Consumer AI After Diverse Investments
SocialJan 20, 2026

Shifting Focus: Exploring Consumer AI After Diverse Investments

our last 10 investments were: - 3 dev tools/infra - 3 vertical niche b2b - 2 deep tech - 1 consumer hardware - 1 general agent would be fun to look at some consumer AI this quarter

By Yohei Nakajima
Day 8 Challenge: Guess the Phrase in Fewest Characters
SocialJan 20, 2026

Day 8 Challenge: Guess the Phrase in Fewest Characters

day #8 of the prompting game how many characters will it take you to get the AI to guess today's phrase? play at https://t.co/jmmguoWeQG https://t.co/jlL6jelBe9

By Yohei Nakajima
Python Script Merged Files for Seamless ChatGPT Input
SocialJan 20, 2026

Python Script Merged Files for Seamless ChatGPT Input

before all these agents, i always had a python script that would traverse all the folders and files to concat into a single file so i could copy/paste easily into chatgpt

By Yohei Nakajima
Use VideoDB to Search, Annotate, Edit Massive Video Data
SocialJan 14, 2026

Use VideoDB to Search, Annotate, Edit Massive Video Data

do you know anyone w a shit ton of video data? have them check out @videodb_io to build search on top of it, annotating at scale (eg. for training data), vibe-editing videos from clips, etc.

By Yohei Nakajima
More Powerful Agents Still Waste Time on Simple Tasks
SocialJan 9, 2026

More Powerful Agents Still Waste Time on Simple Tasks

increasingly the capabilities of an agent often results in increased cost/time spent on easier tasks “oh, you just need a router to determine if it needs more or less capability” easier said than done

By Yohei Nakajima
Start Simple with Traces, Add Complexity Later
SocialJan 9, 2026

Start Simple with Traces, Add Complexity Later

the idea of using traces so agents can better perform over time is easy to talk about, but hard to implement for anyone just getting started, this was a v1 of me trying this 1.5 yrs ago. you'll find it breaks...

By Yohei Nakajima
AI‑First Legal Service Merges Human Expertise with Affordable Automation
SocialJan 8, 2026

AI‑First Legal Service Merges Human Expertise with Affordable Automation

what does an ai first legal service look like? @docdraftai pairs legal expertise from real human lawyers with ai to provide affordable solutions for customers they have a new /customer-stories page with case studies so i so pulled out stats to better...

By Yohei Nakajima
AI Can
SocialJan 7, 2026

AI Can

you can effectively give an ai power of attorney if you set it up through an llc, but there still needs to be a human fiduciary

By Yohei Nakajima
AI Literacy: From Prompt Crafting to Model Perception
SocialJan 7, 2026

AI Literacy: From Prompt Crafting to Model Perception

first-order ai literacy is knowing what to say to a model. prompts, tweaks, vibes, try again. second-order ai literacy is knowing how it hears you. fewer words, more shape.

By Yohei Nakajima
Our AI Investment Thesis Mirrors Industry Trends
SocialJan 6, 2026

Our AI Investment Thesis Mirrors Industry Trends

okay i lied. the first prompt was, "here are my AI investments, write me a VC think piece about the state of AI incorporating these" and then we iterated. still, it reads pretty well, captures our thinking, and a good intro...

By Yohei Nakajima
Nearly Kept BabyAGI Closed, Then Opened Source
SocialDec 27, 2025

Nearly Kept BabyAGI Closed, Then Opened Source

i almost didn’t open source babyagi

By Yohei Nakajima
Automate Team Meetings with ChatGPT: From Questions to Gantt
SocialDec 24, 2025

Automate Team Meetings with ChatGPT: From Questions to Gantt

we did something similar at @untappedvc queued up chatgpt to create questions we talked through as a team, uploaded transcription of the meeting to generate a plan, converted it into a gantt chart, and then we do monthly meetings to talk...

By Yohei Nakajima
ChatGPT Powered My Year: 11k Messages, AI‑Driven VC
SocialDec 22, 2025

ChatGPT Powered My Year: 11k Messages, AI‑Driven VC

my year w chatgpt: - agents, fund II, AI in VC - most likely to automate himself out of a job - 11k msgs sent across 1342 chats https://t.co/n5ibOtorvd

By Yohei Nakajima
Use Famous Authors' Names to Define AI Writing Style
SocialDec 9, 2025

Use Famous Authors' Names to Define AI Writing Style

when i want to specify writing style to an ai, i don’t describe the writing style in the prompt i first ask an ai to give me writers known for the style i want, and then include the writers’ name in...

By Yohei Nakajima
Invested in Memory-First AI Agent for Seamless Workflow
SocialDec 8, 2025

Invested in Memory-First AI Agent for Seamless Workflow

excited to be an investor in general intelligence co! i’ve tried tons of general agents, and so much of how these guys built cofounder resonated with me (memory first), I broke my preseed deal to invest. it’s part of my daily...

By Yohei Nakajima
How to Choose the Right Number of Clusters
SocialDec 8, 2025

How to Choose the Right Number of Clusters

been playing a bit with vector based clustering, and haven’t quite figured out the best way to pick number of clusters. i tried some of the algorithms that choose cluster number for you, but it’s often either too many or too...

By Yohei Nakajima
AI Enables Expert-Focused, Condensed Technical Writing
SocialDec 6, 2025

AI Enables Expert-Focused, Condensed Technical Writing

historically when writing, we’d write in a way that your entire target audience could comprehend, meaning you explain enough for the dumbest person in your target audience but now that everyone has ai, i think some writing can start targeting the...

By Yohei Nakajima
New Survey Highlights Cutting-Edge Self‑Improving Agent Techniques
SocialDec 5, 2025

New Survey Highlights Cutting-Edge Self‑Improving Agent Techniques

"better ways to build self-improving agents" i had chatgpt write me a paper summarizing approaches to build self-improving agents, focusing on 2025 neurips papers found using @exaailabs "paper" in thread 👇 https://t.co/IbabIsfaGk

By Yohei Nakajima
Seven NeurIPS Papers Explore Self‑Improving Agents
SocialDec 4, 2025

Seven NeurIPS Papers Explore Self‑Improving Agents

found 7 neurips papers on "self-improving agents"! https://t.co/GEA5krNUVb

By Yohei Nakajima
Edge Computing Accelerates AI Inference Deployment
SocialDec 4, 2025

Edge Computing Accelerates AI Inference Deployment

lots of talk about inference moving to edge today here’s a nice intro thread from someone who’s been working on this:

By Yohei Nakajima
Edge Inference Flips Economics—Try Mobile SDKs Now
SocialDec 4, 2025

Edge Inference Flips Economics—Try Mobile SDKs Now

the economics change rapidly when inference moves to the edge a perfect time to start playing around w mobile inference sdks like @RunAnywhereAI

By Yohei Nakajima
Self‑learning Agents Gaining Traction in Research
SocialDec 3, 2025

Self‑learning Agents Gaining Traction in Research

finally seeing an increasing number of projects and research under the “self-learning” agents bucket :)

By Yohei Nakajima
AI‑Native CRMs Shine: Attio Leads, Others Follow
SocialDec 3, 2025

AI‑Native CRMs Shine: Attio Leads, Others Follow

ai native crms. @attio is great (we switched to it recently). @newitemco also looks solid/agentic. i havent played with it yet but @lightfld also seems similar.

By Yohei Nakajima
Superhuman's Agentic Writing Pulls Emails and Web Context
SocialDec 3, 2025

Superhuman's Agentic Writing Pulls Emails and Web Context

just tried superhuman's agentic writing - you can ask it to look up relevant emails/web info as context!

By Yohei Nakajima
Looking for Your Favorite New AI Tools
SocialDec 3, 2025

Looking for Your Favorite New AI Tools

any new ai tools that you’ve started using recently and love?

By Yohei Nakajima
Future AI Memory Needs Concepts, Tags, and Clustering
SocialDec 2, 2025

Future AI Memory Needs Concepts, Tags, and Clustering

good intro to a couple of concepts/approaches to memory. not sure i agree agents need to forget, but I agree some sort of strategy is required to make sure you’re efficiently pulling only data you need into the context. i think current...

By Yohei Nakajima
ChatGPT Now Includes Interactive Finance Widget
SocialDec 1, 2025

ChatGPT Now Includes Interactive Finance Widget

just noticed this interactive "finance-widget" in chatgpt for the first time https://t.co/DAk0SqRcC2

By Yohei Nakajima
Ditto Powers New Functional Vibe Coding App
SocialDec 1, 2025

Ditto Powers New Functional Vibe Coding App

okay fine this is fun someone built a working vibe coding app on top of my earlier project called ditto (self-building coding agent w ~500 lines of code) https://t.co/VK2yyTzUnS https://t.co/GOoqgreIgr

By Yohei Nakajima
Embeddings Beat LLMs for Fast, Cheap Classification
SocialNov 25, 2025

Embeddings Beat LLMs for Fast, Cheap Classification

totally forgot about this experiment where i found it was faster and cheaper to do classification via embeddings vs using the fastest/cheapest llm (at the time)

By Yohei Nakajima
Embedding Classification Beats Fastest Model on Speed, Cost
SocialNov 25, 2025

Embedding Classification Beats Fastest Model on Speed, Cost

@jasonth0 did an experiment a bit back, and found that embedding based classification seemed consistently faster and cheaper than using the cheapest/fastest model (at the time) https://t.co/uuEPwu88cg

By Yohei Nakajima
LLM
SocialNov 25, 2025

LLM

kinda like this, but instead of using vec2text - i found grabbing a few samples from each cluster and feeding into an llm came up with better names (not surprisingly) https://t.co/K8phyyDFdR

By Yohei Nakajima
Clustering Embeddings Drives Dynamic Ontology Exploration
SocialNov 25, 2025

Clustering Embeddings Drives Dynamic Ontology Exploration

last weekend i went down the rabbit hole of how to build dynamic ontologies, and kept coming back to clustering of embeddings curious if anyone has cool experiments i could look at around this

By Yohei Nakajima
Visualizing Karpathy’s Key Idea
SocialNov 19, 2025

Visualizing Karpathy’s Key Idea

i liked this @karpathy post from a few months back, and put together a quick slide to show this visually https://t.co/cQCkYxmQsB

By Yohei Nakajima
Master One AI Tool, Skip the Noise
SocialNov 19, 2025

Master One AI Tool, Skip the Noise

most people would be further along ignoring all ai discourse and just mastering one ai tool

By Yohei Nakajima
AI-Powered Tool Turns Research Into Ready-Made Listicles
SocialNov 17, 2025

AI-Powered Tool Turns Research Into Ready-Made Listicles

started working on a deep research agent to build nice lists for me and one thing led to another... introducing researchoor dot com an ai powered social listicle builder https://t.co/RoAEj1jDYE

By Yohei Nakajima
AI Needs Onboarding and Scaffolding, Not Just Raw Models
SocialNov 12, 2025

AI Needs Onboarding and Scaffolding, Not Just Raw Models

this is an interesting experiment I love but it seems like they did little to no onboarding for the ai, where they didn’t even have the ai review the tools data schema and learn from it before trying to use...

By Yohei Nakajima
AI Builders Clone Games, Only Rename—Ethical Question
SocialNov 12, 2025

AI Builders Clone Games, Only Rename—Ethical Question

not sure how i feel about ai app builders cloning existing games and just letting users change the name… (maybe this is okay cuz it was a tutorial meant to be cloned/learned from?) https://t.co/dYWJZ0E2Dk

By Yohei Nakajima
Offload Model Inference to Devices, Slash Cloud Costs
SocialNov 7, 2025

Offload Model Inference to Devices, Slash Cloud Costs

if you're already starting to fine-tune open source models for smaller tasks, using something like the @runanywhereai sdk can let you offload some of the inference to user devices, lowering cloud inference costs and latency but there's probably more fun/unique applications...

By Yohei Nakajima
Ollama Goes Mobile, Attracts Growing Interest
SocialNov 7, 2025

Ollama Goes Mobile, Attracts Growing Interest

ollama for mobile, picking up attention https://t.co/sBa5luBHLh

By Yohei Nakajima
AI Email Client Auto‑Tags, Scores, and Drafts Replies
SocialNov 3, 2025

AI Email Client Auto‑Tags, Scores, and Drafts Replies

this weekend, i vibe coded a prototype email client that i want... - for each email, looks up contacts details + notes in attio, then org details, looks at lists to determine if portfolio, LP, etc. - summarizes this context and creates...

By Yohei Nakajima
AI Drafts Legal Docs, Lawyers Still Essential
SocialNov 3, 2025

AI Drafts Legal Docs, Lawyers Still Essential

ai can draft legal docs but you still want a lawyer to review it. i’m a fan (and investor) of services like @DocDraftai that combines the best of both into a single elegant service :)

By Yohei Nakajima
Add AI to Any Site with a Tiny Widget
SocialOct 16, 2025

Add AI to Any Site with a Tiny Widget

[tiny project] ai-share-widget the easiest way to add* ai capability to a site with a front-end widget where you can customize the prompt and allow the user to pass that into their AI tool of choice github (102 lines of code) in...

By Yohei Nakajima