---
id: surface.infotech.reuse-surface.federation-sources
name: reuse-surface federation sources
kind: app-config
summary: Federation roster and source list that define which registries reuse-surface aggregates, including the reserved id namespaces.
owner: reuse-surface
status: active
scope:
  allowed_layers: [company, platform, installation]
  default_layer: company
mutability: hot-reloadable
security_class: operational
schema:
  type: object
  validator: ~/reuse-surface/schemas/federation.schema.yaml
sources:
  - repo: reuse-surface
    path: registry/federation/sources.yaml
    role: company-baseline
  - repo: reuse-surface
    path: registry/federation/local-repo-roster.yaml
    role: installation-overlay
relations:
  consumed_by:
    - service.reuse-surface-hub
  overrides: []
  depends_on_secret: []
  related_to:
    - surface.infotech.state-hub.api-config
evidence:
  last_seen: '2026-06-26'
  discovery_method: manual
  change_log_ref: ATLAS-WP-0002-T03
---

# reuse-surface federation sources

The federation sources configure which registries reuse-surface aggregates and the
id namespaces each owns. config-atlas federates here as a typed peer (the `surface.*`
namespace reservation is ATLAS-WP-0002-T05).

- **Source of truth:** `reuse-surface/registry/federation/{sources,local-repo-roster}.yaml`.
- **Why indexed:** this is the surface that governs cross-registry interoperability;
  config-atlas's own discoverability depends on it.