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Pre-implementation gate

Before writing Android library source, satisfy this checklist. The v0.1 MVP is frozen — see mvp.md. Do not expand scope while implementing MVP.

Agents: read AGENTS.md, then this page, then the linked contracts. Do not start cabin-compose media/HVAC/EV/vehicle-controls screens until MVP is done.

Gate checklist​

Product & scope​

  • MVP scope understood (tokens + Restriction Engine + Theme Kit + System Bar + Status Bar, Views-first)
  • Non-goals in MVP respected (no media/HVAC/EV domain screens, no catalog app)
  • Pillars still apply (product/pillars.md)

Contracts to implement against​

Build & distribution​

  • Dual Gradle + Soong path understood (build-tree, ADR 0001)
  • Views-first platform (ADR 0002)
  • Tokens via overlay/RRO (ADR 0003)
  • Compliance as separate module (ADR 0004)
  • Thin deps: SystemUI gets tokens + compliance + views only

Agent affordances (already shipped — use, don’t reinvent)​

Do not start until MVP lands​

WorkStatus until MVP done
cabin-compose media / HVAC / EV / vehicle-controls screensBlocked
Overlay & Toast as a full pattern packLater (bars may use minimal feedback only if required)
Catalog app / docs website implementationLater
Kitchen-sink umbrella modulesNever
Compose-first SystemUINever (Views-first is frozen)

Compose Theme Kit stubs that mirror Views token resolution may land with MVP only insofar as they prove token parity — not as a path to ship domain Compose screens early. Prefer Views chrome for v0.1 success criteria.

Suggested implementation order (post-gate)​

1. cabin-tokens (+ codegen from tokens/cabin.tokens.json)
2. cabin-compliance (Restriction Engine per restriction-states.md)
3. Theme Kit (Views theme from tokens; optional Compose mirror)
4. System Bar (Views)
5. Status Bar (Views)
6. Soong bp + thin SystemUI wiring sketches / samples as needed
7. Tests per docs/testing.md