- plan.md — full project plan v0.2: architecture, feature inventory, phased roadmap, design system. Start here if you want the whole picture in one document.
- cloud-setup.md — register your own OAuth client IDs with Google / Microsoft / Dropbox to use the cloud connectors.
- adr/ — architecture decision records for choices that needed an explicit "why" trail (library picks, schema versioning, threat model).
The top-level README.md, ROADMAP.md, CONTRIBUTING.md, SECURITY.md, and LIMITATIONS.md cover the user- and contributor-facing material; this folder is the engineering deep-dive.