[Provider]: Opencode Zen / GO

[jeroenev]

Provider name

Opencode Zen / GO

API compatibility

OpenAI-compatible

Provider documentation

There should only be 2 things missing:

• Identify itself with its own user agent, such as my-coding-agent/1.0, rather than a generic SDK or HTTP-library name.
• Send a stable session ID in x-opencode-session for each conversation so we can optimize routing and prompt caching.
  See: https://opencode.ai/docs/go/#where-can-i-use-it

Opencode models work with different API's depending on the model (OpenAI compatible, Responses API or Anthropic compatible) see https://opencode.ai/docs/go/#endpoints
Matching the original providers' endpoints

Models and capabilities

Should match the original provider's version in capabilities. Ex. deepseek-v4-flash doesn't support images, gpt-5.6-luna does.

Authentication and base URL

simple URL + API-key authentication on https://opencode.ai/zen/go

Privacy check

• This provider requires users to explicitly configure their own credentials or local endpoint.
• I did not include any API key or secret in this issue.