# Core Hub

Core Hub is the 3rd-generation Production Interaction Framework for Coulomb / Helixforge.

## Hub stack glossary

| Name | Role |
| --- | --- |
| **hub-core** | Shared library — `hub_core` utils, models, router factories |
| **state-hub** | Dev coordination — file-first workplans, agent MCP |
| **core-hub** | This repo — production `/api/v2` framework |

Ecosystem architecture: `/home/worsch/the-custodian/docs/hub-ecosystem-architecture.md`

It carries forward the lessons from State Hub and Inter-Hub: workplans and progress need to be durable, domains need typed ways to publish state and evidence, operators need a coherent console, and agents need APIs that are predictable enough to automate against. The rebuild moves that intent onto a lighter production platform.

## Generations

- Gen 1: `state-hub` - file-backed workplans, tasks, progress, messages, and read-model synchronization.
- Gen 2: `inter-hub` - the integrated hub framework idea: manifests, widgets, registries, events, API consumers, and a shared UI, implemented in Haskell/IHP.
- Gen 3: `core-hub` - the same framework ambition rebuilt contract-first on the natural Coulomb stack.

## Initial Stack Direction

- Python 3.12
- FastAPI and Pydantic v2
- SQLAlchemy async, Alembic, asyncpg, Postgres
- pytest and contract fixtures
- OpenAPI and JSON Schema for public contracts
- whynot-design aligned UI components/adapters where operator UI is needed
- Docker/Kubernetes/ArgoCD on the normal Railiance platform path

## Key Documentation

- [INTENT.md](INTENT.md) - purpose, lineage, principles, and platform direction
- [STATE.md](STATE.md) - current production truth, open work, and known conditions
- [SCOPE.md](SCOPE.md) - repo boundary
- [Research artifact](docs/research/2026-06-27-core-hub-lineage-and-platform-reset.md) - what we learned from State Hub, Inter-Hub, Haskell/IHP, and whynot-design
- [Specs index](docs/specs/README.md) - contract and implementation specification map
- [Workplans](workplans/) - staged implementation plan using ADR-001 workplan files

## Current Work

The contract, FastAPI/Postgres foundation, Inter-Hub migration, Haskell/IHP
retirement, and relocation from CoulombCore to railiance01 are complete.
`CORE-WP-0011` is finished. The only open local workplan is runtime absorption
and eventual archive (`CORE-WP-0010`). Its dual-run design is recorded and S0
is active against published hub-core revision `7e1ec03`, building the durable
backend and internal candidate before any public traffic changes.

Operational migration bundles are emitted without raw key material:

```bash
core-hub-ops migration export --source-revision "$(git rev-parse HEAD)" \
  --output core-hub-export.json
```

`CORE_HUB_V2_WRITE_GROUPS` controls legacy write authority for `registry`,
`credentials`, `interaction`, and `deferred`. The deployment package must
remove a group here before enabling the matching hub-core writer.