VISUAL SYSTEMS
Visual mental models for the systems you use but don't fully understand. No prerequisites. No hand-waving. Just clear, animated explanations.
The chain rule meets gradient descent. Watch how neural networks learn by propagating errors backward through every layer.
Every database you use is built on B-trees. See how they minimize disk I/O to search billions of rows efficiently.
How do tools like Claude Code, Cursor, and Devin actually write code? The ReAct loop, tool calling, and context management — animated.
Every step of a DNS query visualized — from your browser's cache to root servers and back, in under 7 minutes.
Docker containers are not virtual machines. See how namespaces, cgroups, and union filesystems create isolated Linux processes.
The 5 generations of engineering that turned hot partitions into a solved problem — from consistent hashing to global admission control.
Words as vectors, sentences as geometry. How embedding spaces capture meaning and power modern AI — from Word2Vec to CLIP.
How JavaScript runs 1000 async tasks on a single thread. The call stack, task queue, microtask queue, and Web APIs — visualized.
Why computers can't represent 0.1 exactly, and what IEEE 754 does about it. The sign-exponent-mantissa encoding, visualized.
Git is a content-addressable object store, not a diff tracker. See how blobs, trees, and commits actually work under the hood.
Most developers think git merge just combines two branches. The real algorithm finds a third file — the merge base — and does a three-way diff that resolves 95% of changes automatically.
A deep dive into hash maps — from the core hash-to-index trick, through collisions and resizing, to how Python, Java, and Go implement them differently.
Most developers carry JWTs on every request but never look inside. The payload is plain text, the signature is the real security, and the alg:none attack broke everything.
Python compiles to bytecode before interpreting it. See the hidden compiler, the dis module, and what actually runs when you hit Enter.
Recursion visualized from the ground up. Watch the call stack build, see Fibonacci branch into a tree, and understand why memoization changes everything.
Your regex compiles into a state machine every time it runs. NFA construction, DFA conversion, backtracking simulation, and the catastrophic ReDoS attack — all animated.
BPE, token boundaries, and glitch tokens — why language models see text differently than you do.
Self-attention, query-key-value, feed-forward networks, and generation — the full transformer architecture, animated step by step.
Vim commands aren't random shortcuts — they're a composable language. Learn the verb + noun grammar, text objects, the dot command, and how the multiplication effect gives you hundreds of commands from a handful of building blocks.
Your program's memory addresses are a lie. Page tables, TLBs, and swap space — the OS abstraction that makes multitasking possible.
