DF8108: Duplicate Renderer Module Type

Message

A renderer module is already registered for dock type "{type}"

Cause

initHub({ renderers }) received two registrations carrying the same type. Each dock type resolves to exactly one renderer module in the hub's renderer manifest — the module served at <base>__renderers/<type>.mjs — so a second registration for the same type would be unreachable.

Example

initHub({
  renderers: [
    jsonRenderUiRenderer(),
    { type: 'json-render', file: myOtherRenderer }, // ✗ duplicate type
  ],
})

Fix

• Keep one registration per dock type — pick the implementation you want the manifest to serve.
• To override a manifest module for one specific client, register a renderer locally instead (createDevframeClientHost({ renderers })); local registrations take precedence.

Source

• packages/hub/src/node/initiate.ts — resolveRendererRegistrations() throws when a type repeats.