# 06 — Model Artifact manifest and Shard advertisement

Status: ready-for-agent

## What to build

Introduce a Model Artifact manifest that separates storage distribution from route execution. A node should be able to verify local model files, determine which Shards it can serve, and advertise artifact/layer availability to the Tracker without contacting Hugging Face at request time.

## Acceptance criteria

- [ ] Manifest records model preset, upstream revision, license, backend support, quantization, context cap, tokenizer artifacts, file hashes, piece hashes, and tensor/layer mapping where available.
- [ ] A node can verify local artifacts against the manifest and reject corrupt or incomplete artifacts.
- [ ] A node can derive advertised Shard ranges from the manifest and local files.
- [ ] Tracker registration can include artifact id, backend id, Shard range, and verification status.
- [ ] Tracker coverage can distinguish model-layer coverage from artifact availability.
- [ ] Tests cover valid manifest registration, corrupt artifact rejection, and missing layer/tensor metadata.

## Blocked by

- 01 — Route Session lifecycle.