GitHub Copilot Provider

The Copilot provider uses the GitHub Copilot SDK for session discovery, transcript replay, turns, model controls, and permission requests. It is experimental and disabled by default.

Prerequisites

• GitHub Copilot CLI installed and authenticated
• Valid GitHub Copilot subscription

Setup

Select Copilot during sidemesh setup (may require --dev flag depending on build) or add manually:

{
  "providers": [
    {
      "kind": "copilot",
      "model": null
    }
  ],
  "defaultProviderKind": "copilot"
}

Capabilities

Feature	Status
Text input	✅
Model switching	✅
Session archive	✅
Interrupt	✅
Approvals (command/permissions)	✅
Local images	❌
Image URLs	❌
Skills	❌
Reasoning levels	❌
Compaction	❌
Filesystem	Host
Terminal	Host

Design notes

• The adapter uses auto as the Sidemesh default for app-started turns so a costly persistent Copilot setting is not consumed by accident
• Model controls are advertised from SDK listModels() metadata with explicit host defaults layered on top
• The adapter intentionally does not read Copilot’s on-disk session files directly
• Images, skills, and richer native tool translation will be enabled only when the adapter can report honest capabilities