# Architecture > How the system is built and why. Update this when the structure changes; a change is > not finished until this reflects it. A documentation-only repo; there is no code. - `TELESCOPES.md`: the deliverable. Per-observatory sections, one entry per telescope (spec bullets then a review paragraph), a "choosing a telescope" table, and general observations. Compiled from the sources below, dated in its header. - `data/itelescope-telescopes.csv`: verbatim CSV export of iTelescope's maintained specs Google Sheet. Treated as the source of truth for numbers; re-exported to refresh (see state/NOTES.md). - `state/`: Default Workflow project memory. - `CLAUDE.md` + `docs/`: the Default Workflow itself, copied from the Default-Workflow repo so the project is self-contained.