# This filename is legacy only

The **run correlation** doc for Activix **v5+**:

**[run-context-object.md](./run-context-object.md)**

**Important:** v5 has **no** public API name **`identity`** for that object—only **`runContext`** (unless you deliberately keep the old BSON key via **`runContextField: 'identity'`**). See [§ v5 runContext-only API (quick)](./run-context-object.md#v5-runcontext-only-api-quick).

- Upgrade steps: [MIGRATION-v5.md](./MIGRATION-v5.md)
- How to tell other teams: [COMMUNICATING-RUNCONTEXT-V5.md](./COMMUNICATING-RUNCONTEXT-V5.md)