OpenCode Go mixes request protocols by model family:
- `glm-5` and `kimi-k2.5` use OpenAI-style `/chat/completions`
- `minimax-m2.5` and `minimax-m2.7` use Anthropic-style `/messages`
OmniRoute already routed MiniMax Go models to `/messages`, but the
executor still sent `Authorization: Bearer ...`, which caused upstream
`401 Missing API key` errors.
This changes `OpencodeExecutor` to send:
- `x-api-key` + `anthropic-version` for Claude-targeted OpenCode Go requests
- `Authorization: Bearer ...` for the remaining OpenCode Go request formats
Also updates unit coverage to assert the correct header behavior for
MiniMax Go models.
Validated with:
- direct curl repro against OpenCode Go endpoints
- `node --import tsx/esm --test tests/unit/opencode-executor.test.mjs`
- `npm run typecheck:core`
- `npm run build`
Otto G