# Data Model Spec

## Purpose

Define the initial Core Hub entity model and the migration stance from State Hub and Inter-Hub.

## Initial Entity Families

Coordination:

- repositories
- workstreams
- workplans
- tasks
- progress events
- messages
- decisions

Framework:

- hubs
- hub capability manifests
- API consumers
- API keys or key references
- widgets
- widget types
- interaction events
- annotations and annotation threads
- requirements
- decision records
- deployment records
- outcome signals
- policy scopes
- registry facts

Operations:

- request logs
- auth audit metadata
- migration batches
- compatibility fixtures
- import/export runs

## Migration Posture

- Import Inter-Hub schema facts through explicit migrations or import tools, not ad hoc SQL editing.
- Preserve identifiers where consumers or historical references depend on them.
- Treat API key full values as non-recoverable unless an approved custody path says otherwise.
- Store only hashes, prefixes, labels, and non-secret lifecycle metadata.
- Record row counts, relationship checks, and fixture replays for every migration batch.

## Open Questions

- Whether Core Hub owns the canonical workplan task tables or continues reading from State Hub until cutover.
- Whether Inter-Hub admin-only entities should be migrated as historical records or redesigned as Core Hub-native resources.