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World Models: From Why Agents Dream to DreamerV3

An interactive series you work through: predict, play, derive and break things, from Dyna to every trick inside DreamerV3, ending with a world mode...

Next genWorld ModelsDreamerV3
Oct 22, 2026 11 chapters · 120+ problems

HaWoR: Putting Egocentric Hands Back in the World

Picture someone wearing head mounted camera glasses in a kitchen. They pick up a kettle from the counter, turn around to face a cup behind them, an...

Computer Vision3D hand pose estimationegocentric video
Oct 23, 2026 46 min read 9

MCP Explained: How AI Connects to the Tools and Data You Use

Imagine asking an AI assistant: “Find the decision in our project notes, check when the team is free, and create a follow up task.” To a person, th...

AI infrastructureModel Context ProtocolAI tool integration
Oct 11, 2026 15 min read 133

Tokenization for LLMs: From Raw Text to Model Inputs

Type hello, world! into an LLM. To you, that string is already meaningful: two familiar words, a comma, a space, and an exclamation mark. To the ne...

Large Language Modelstokenizationsubword algorithms
Sep 14, 2026 40 min read 437

Mechanistic Interpretability: Reverse-Engineering the Algorithms Inside Neural Networks

Take a simple completion: “Alice gave Bob the book because wanted it.” Suppose the model assigns a high target logit $y$ to the correct next token....

AI Interpretabilitymechanistic interpretabilitytransformer circuits
Sep 8, 2026 19 min read 253

World Models: Learning Enough of the Future to Act

A robot is about to push a puck across a table. There is a target marked a little farther away, and beyond it, the edge. A gentle push might leave ...

Model-Based Reinforcement LearningWorld ModelsRobot Learning
Sep 8, 2026 26 min read 229

veScale-FSDP: Flexible, Structure-Aware Sharding at 10K-GPU Scale

Suppose you want to train a model with a matrix optimizer such as Muon. The optimizer does not think of a weight matrix as a bag of independent num...

Distributed Machine Learning SystemsFSDPRaggedShard
Sep 2, 2026 20 min read 234

DeepSeek's Plugin Paradigm: Spatiotemporal Composability

A plugin registers commands, subscribes to events, allocates resources, and changes shared state. Loading is easy because the host can start execut...

Dynamic software compositionplugin systemsrevertible effects
Aug 28, 2026 12 min read 475

Beyond Reinforcement Learning: Sampling as Optimization for Reasoning Models

Imagine an LLM solving a math problem. It samples a full reasoning trace, you run a verifier, and the verifier returns a number: perhaps 0 for a co...

Machine Learningenergy-based modelsimportance sampling
Aug 28, 2026 18 min read 323

WarpSAC: When More Data Changes the Right RL Algorithm

Imagine training a robot arm from a replay buffer that contains plenty of examples of ordinary motions—move left, move right, lower the gripper—but...

Reinforcement LearningSoft Actor-CriticScalable Off-Policy RL
Aug 28, 2026 25 min read 252

Attention Is All You Need: The Transformer

A diagram-rich generated explanation from the public library.

Machine LearningTransformersAttention
Aug 18, 2026 45 min read 945

Action Chunking with Transformers (ACT): Learning Fine-Grained Bimanual Manipulation with Low-Cost Hardware

A diagram-rich generated explanation from the public library.

Machine LearningTransformers
Aug 18, 2026 45 min read 892