# StellaOps Signer

Signer validates callers, enforces Proof-of-Entitlement, and produces signed DSSE bundles for SBOMs, reports, and exports.

## Responsibilities
- Enforce plan quotas and PoE before signing artifacts.
- Support keyless and keyful signing backends.
- Emit DSSE payloads consumed by Attestor and downstream bundles.
- Maintain audit trails for all signing operations.

## Key components
- `StellaOps.Signer` service host.
- Crypto providers under `StellaOps.Cryptography.*`.

## Integrations & dependencies
- Authority for OpTok validation.
- Attestor for transparency logging.
- Export Center and CLI for artifact signing flows.

## Operational notes
- Key management via Authority/DevOps runbooks.
- Metrics for signing latency/throttle states.
- Offline kit integration for signature verification.

## Backlog references
- SIG docs/tasks in ../../TASKS.md (e.g., DOCS-SIG-26-006).

## Epic alignment
- **Epic 10 – Export Center:** provide signing pipelines, cosign interoperability, and provenance manifests for bundle promotion.
- **Epic 19 – Attestor Console:** supply DSSE payloads and Proof-of-Entitlement enforcement feeding attestation workflows described in `docs/modules/attestor/`.