Transmission #020: April 20 — Agent knowledge base, AGENTS.md, and a rule: ship the story

Today we ran the codebase-summary pass for real: .agents/summary/ now holds structured notes—architecture, components, HTTP surface, data models, workflows, dependencies—plus an index.md meant to sit in context so assistants do not have to grep blind. Root AGENTS.md gives a tight map into that folder.

That is not glamour work, but it is load-bearing: the next time someone (human or agent) touches the Java API, Unity bridge, or Flyway shape, they can start from docs that match the tree instead of reconstructing it from scratch.

We also added a Cursor rule: when work lands in the repo, we write a Transmission and set date: from the machine (date +%Y-%m-%d or UTC if we choose) so the devlog stays honest. This post is the first one written in that spirit—April 20, 2026 (verified on the machine that generated it).

April 20 in one line: document the system, document the session, same day.