Module convert 

Conversion between framework types and GitHub Copilot’s OpenAI-compatible /chat/completions wire format.

Once authenticated with an exchanged Copilot API token, GitHub Copilot’s chat endpoint speaks the exact same JSON shapes as OpenAI’s Chat Completions API for everything this crate needs: messages, tools/tool_choice, the scalar sampling options, the non-streaming response envelope, usage, and the chat.completion.chunk SSE delta shape. So request-body assembly and response/usage parsing are reused verbatim from [agent_framework_openai::convert] rather than duplicated (mirrors how agent-framework-ollama and agent-framework-foundry-local reuse the same module, and for the same reason). Only the streaming-delta parser is reimplemented locally, kept small on purpose, so it can be unit-tested here over fixture JSON without going through a live reqwest::Response.

This module has nothing to do with the GitHub OAuth-token-to-Copilot-token exchange (see the crate root for that) — it only converts chat request/response bodies, after authentication has already produced a usable Copilot bearer token.

Functions

build_request

Build the /chat/completions request body.

parse_delta

Parse one streamed chat.completion.chunk value into an update, resolving tool-call ids from the index map (a streamed tool-call delta only carries its id on the first chunk; later chunks reference it by index).