# SilverMetal Droid

**Status**: Phase 2 (planning, post-Linux v1)

Android coverage across four tiers. See [`../docs/platform-matrix.md`](../docs/platform-matrix.md) for honest per-tier pros/cons.

## Tiers

### SilverMetal Droid Flagship — Pixel (Tier B)
GrapheneOS-fork on Pixel hardware. Verified boot we control, hardened kernel, app sandboxing enforced. Full SilverLABS Stack preinstalled.

### SilverMetal Droid Galaxy — Samsung (Tier C)
LineageOS / DivestOS-fork on Samsung models with unlockable bootloaders. Stack overlay on locked-bootloader models.

### SilverMetal Droid Moto — Motorola (Tier C)
DivestOS / LineageOS-fork on supported Motorola models. Stack overlay everywhere.

### SilverMetal Droid Profile — generic (Tier D)
"Harden my existing Android" — full SilverLABS Stack + work-profile-based hardening config. Runs on any Android 13+ without bootloader changes.

## Directory layout

To be populated in Phase 2. Initial structure planned:

```
android/
├── flagship/      # Pixel / GrapheneOS-fork build config
├── galaxy/        # Samsung ROM build configs
├── moto/          # Motorola ROM build configs
├── profile/       # Generic profile installer + work-profile config
└── shared/        # Common build infra, signing, OTA
```

## Verification gates (per-tier)

- ROM tiers: verified boot rooted in our key (Pixel only); reproducible builds; OTA signed and rollback-tested
- Profile tier: Stack apps installed and functional; work-profile isolation verified
- All tiers: telemetry-leak test (no Google services contact unless explicitly opted in by user)

## Upstream we depend on

- **GrapheneOS** — Pixel flagship base
- **LineageOS** — Samsung / Motorola base
- **DivestOS** — additional hardening patches
- **AOSP** — root upstream