@beautiful-ccg/adapter-copilot

bccg adapter for GitHub Copilot CLI. This is the project's core adapter — the only CLI with --model flag for intra-CLI model routing.

Usage

import { CopilotAdapter } from "@beautiful-ccg/adapter-copilot";

const adapter = new CopilotAdapter();

// Run with default model
const result = await adapter.run("explain this code");

// Run with a specific model
const result2 = await adapter.run("analyze complexity", { model: "opus" });

// List available models
const models = await adapter.getSupportedModels();

Properties

| Property | Value | |---|---| | name | "copilot" | | costTier | "medium" | | multiModel | true |

CLI Command

copilot -p <prompt> -s --output-format json --allow-all-tools [--model <model>]

Output is JSONL. The parser handles session.tools_updated (model detection), assistant.message (content + reasoning), assistant.message_delta (streaming fallback), and result (exit code + usage).

Multi-Model Support

The Copilot CLI supports multiple backend models via --model. Short aliases are available:

| Alias | Full Model Name | |---|---| | opus | claude-opus-4.6 | | sonnet | claude-sonnet-4.5 | | codex | gpt-5.3-codex | | gemini | gemini-3-pro | | haiku | claude-haiku-4.5 |

import { resolveModel, COPILOT_MODELS, MODEL_ALIASES } from "@beautiful-ccg/adapter-copilot";

resolveModel("opus");   // "claude-opus-4.6"
resolveModel("sonnet"); // "claude-sonnet-4.5"

Exports

• CopilotAdapter — ModelAdapter implementation
• parseCopilotOutput(stdout: string): CopilotParsed — standalone parser
• CopilotParsed — { content, model, exitCode, premiumRequests?, reasoningText? }
• COPILOT_MODELS — supported model names (const array)
• MODEL_ALIASES — short alias → full model name mapping
• resolveModel(input: string): string — resolve aliases
• CopilotModel — union type of supported models