Notes on building reusable agent logic — skills, design systems, and honest benchmarks — produced end-to-end by agents on personal infrastructure.
A series that reads Claude's harness from the inside: the code Claude Code ships, the public docs and the logs of real sessions, every claim with its source. This page announces it and doubles as its index: it is updated every time an article moves forward or is published.
I worked with a Claude Code cloud session for a full day. It never saved a memory, and the binary explains why: auto memory is off by default in remote sessions. So I read what memory would have done: four types, a list of things never to save even when asked, and a rule that a remembered fact is only a claim about the past.
Everyone is asking whether shared Claude Code Projects will share memory, instructions and decisions between people, or only the threads. The public docs answer for today: a project belongs to one person. The inside of Claude Code shows a memory layer already built with private and team scopes. Here is what each side says, and what nobody can see yet.
On November 6, Anthropic said Claude Code cloud sessions can now work out a repo's dependencies, network access and API keys, and save the environment for next time, without Claude ever seeing the keys. I checked each promise from inside a live session: the keys are a placeholder string, the proxy is Claude Code itself, every access change is a card, and one promise is a rule nothing enforces.
A full teardown of 69 internal files from Claude's Artifact runtime ('appifacts'): the tool definition, the artifact-design skill, and the 6 core types (Dashboard, Slides, Design, Design System, Docs, Motion) — plus a hard look at how the platform steers users away from portable scripts and Markdown toward hosted lock-in.
I turned the logic behind a LinkedIn carousel into a reusable skill, then benchmarked it across 3 models × 2 skills. The real story is the defect I caught by eye and fixed once — in the versioned logic, so all three models benefited.