astrolabe/CLAUDE.md

# Claude Context — Astrolabe

See @AGENTS.md for project overview, architecture rules, and the AI developer protocol.

## Documentation Index

- **[SOUL.md](SOUL.md)** — project philosophy and identity. _Read first._
- **[docs/spec/](docs/spec/)** — authoritative behavioral specification (sections 00–10):
  the **what**. This is the contract; implement to it.
- **[docs/architecture/](docs/architecture/00-overview.md)** — architecture playbook
  (00–09): the **how** (state, persistence, modals, routing, rendering, inference,
  relationships, vega-editor techniques, visual design). Self-contained — no external
  repo needed. Companion: **[visual-specimen.html](docs/architecture/visual-specimen.html)** —
  token sandbox + reusable-primitive catalog (open in a browser).
- **[docs/IMPLEMENTATION-PLAN.md](docs/IMPLEMENTATION-PLAN.md)** — incremental milestone
  plan (M0–M6), MVP boundary, per-milestone tests + manual checks, and an architecture
  reference index.
- **[AGENTS.md](AGENTS.md)** — onboarding, stack, directory map, scripts, conventions.

## Quick Orientation

- Astrolabe is a **spec-driven rebuild** — the behavior is fixed in `docs/spec/`; the
  architecture is adapted from Syto. Implement to the spec; don't port legacy code.
- **`src/core/` is portable and tested hardest.** Browser specifics live in
  `src/app/infrastructure/`. UI is React + Zustand.
- **Editor is Monaco**, charts render via **vega-embed**, storage is **IndexedDB**.
- Work milestone by milestone (see the plan): core-first, then UI, then tests, then a
  manual smoke check against the spec's acceptance points.

## Conventions

- No git actions unless explicitly invited.
- Run `npm run typecheck` and `npm test` after changes.
- Single-line commit subjects; no Co-Authored-By trailers.