opencode-go hard-coded targetFormat: claude per model, so every client
format was force-routed to /messages (Codex/OpenAI clients paid a lossy
Responses->OpenAI->Claude double translation). Declare the existing
upstream multi-endpoint transports [openai, claude, openai-responses]
and guard per model via registry supportedFormats: kimi/glm/mimo only
support /chat/completions, minimax/qwen add /messages, deepseek adds
/responses. Undeclared models keep the upstream default.
Drop the bespoke OpenCodeGoExecutor (its shared _lastModel cache could
cross auth headers between concurrent requests); DefaultExecutor already
consumes runtimeTransport and injects reasoning content.
Update OpenCode Go model catalog to match the official Go docs.
Route Qwen 3.7 and MiniMax models through /v1/messages with
Anthropic-compatible headers instead of OpenAI-compatible chat.
Keep GLM, Kimi, DeepSeek, and MiMo on /chat/completions; use
kimi-k2.7-code because the live Go API rejects kimi-k2.7 for chat
while the docs config example uses the code model ID.
PR #1931 by nguyenha935
Co-authored-by: Cursor <cursoragent@cursor.com>
