OpenCode

OpenCode manages each provider directly, so override the connection per provider in ~/.config/opencode/opencode.json. Deep-merge the block below under provider and compaction. This example configures Anthropic. Repeat the provider block for each provider you use.

{
  "compaction": { "prune": false },
  "provider": {
    "anthropic": {
      "options": {
        "baseURL": "http://127.0.0.1:17321",
        "headers": {
          "sleev-provider": "anthropic",
          "sleev-harness": "opencode"
        }
      }
    }
  }
}

This sends the Anthropic provider through the local Sleev gateway. Setting compaction.prune to false leaves context management to Sleev.

OpenCode 2 (currently in beta) uses a new provider config shape. Use providers instead of provider, put baseURL under settings, and put headers directly on the provider. OpenCode 2 does not use compaction.prune.

{
  "providers": {
    "anthropic": {
      "settings": {
        "baseURL": "http://127.0.0.1:17321"
      },
      "headers": {
        "sleev-provider": "anthropic",
        "sleev-harness": "opencode"
      }
    }
  }
}