Assetlib SDK preview 0.1.0-preview.1

An installable developer preview for signed artwork delivery into typed app placements.

• TypeScript core: pinned Ed25519 signatures, app-scoped manifests, SHA-256 image verification, durable sequence checks, lazy downloads, and bounded verified cache.
• Expo 57 adapter: native filesystem and web IndexedDB storage, expo-image rendering, and bundled fallback.
• Offline placement generator plus a local, read-only asset audit and agent skill.

Install both matching SDK tarballs using the README. Packages are not published on npm. SHA256SUMS is attached.

Validation: 10 core tests, 9 audit tests, Expo typecheck, fresh workspace install, and isolated tarball-consumer typecheck passed. Native device runtime validation remains pending. Experiment assignment, Figma sync, usage telemetry, key rotation, and production operations are outside this preview.