opencode-provider

@omniroute/opencode-provider

Helper for connecting OpenCode to a running OmniRoute AI gateway.

The package emits a schema-valid entry for opencode.json (https://opencode.ai/config.json) that delegates the actual runtime to @ai-sdk/openai-compatible. It does not ship any new HTTP client — OmniRoute already exposes an OpenAI-compatible surface, and OpenCode already speaks it through the AI SDK.

Pre-1.0. The API may still change. See CHANGELOG in the OmniRoute repo for breaking notes.

Installation

npm install --save-dev @omniroute/opencode-provider
# or
pnpm add -D @omniroute/opencode-provider

You also need OpenCode's own runtime dep, but that's a transitive concern — OpenCode itself ships with @ai-sdk/openai-compatible. This package only generates configuration.

Quick start

1. Scaffold a fresh opencode.json

import { writeFileSync } from "node:fs";
import { buildOmniRouteOpenCodeConfig } from "@omniroute/opencode-provider";

const config = buildOmniRouteOpenCodeConfig({
  baseURL: "http://localhost:20128", // or your OmniRoute deployment URL
  apiKey: process.env.OMNIROUTE_API_KEY ?? "sk_omniroute",
});

writeFileSync("opencode.json", JSON.stringify(config, null, 2));

The resulting opencode.json:

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "omniroute": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "OmniRoute",
      "options": {
        "baseURL": "http://localhost:20128/v1",
        "apiKey": "sk_omniroute",
      },
      "models": {
        "claude-opus-4-5-thinking": { "name": "claude-opus-4-5-thinking" },
        "claude-sonnet-4-5-thinking": { "name": "claude-sonnet-4-5-thinking" },
        "gemini-3.1-pro-high": { "name": "gemini-3.1-pro-high" },
        "gemini-3-flash": { "name": "gemini-3-flash" },
      },
    },
  },
}

2. Merge into an existing opencode.json

import { createOmniRouteProvider } from "@omniroute/opencode-provider";

const provider = createOmniRouteProvider({
  baseURL: "http://localhost:20128",
  apiKey: process.env.OMNIROUTE_API_KEY!,
});

// Place `provider` under provider.omniroute in your opencode.json

If you already have an opencode.json on disk and want a non-destructive merge from the OmniRoute side, use omniroute config opencode from the CLI (ships with the main OmniRoute install) — it preserves comments and unrelated keys.

API

createOmniRouteProvider(options): OpenCodeProviderEntry

Returns the value to place under provider.omniroute inside opencode.json.

Option	Type	Required	Description
baseURL	string	Yes	OmniRoute base URL. Accepts http://host:port or http://host:port/v1. Trailing slashes are tolerated.
apiKey	string	Yes	OmniRoute API key. Use sk_omniroute for local installs that have REQUIRE_API_KEY=false.
displayName	string	No	Custom name shown in the OpenCode UI. Default: "OmniRoute".
models	string[]	No	Override the surfaced model catalog. Default: 4 curated models — see OMNIROUTE_DEFAULT_OPENCODE_MODELS.
modelLabels	Record<string,string>	No	Human-readable labels keyed by model id.

Throws on empty/invalid input — baseURL must be a real URL, apiKey must be a non-empty string.

buildOmniRouteOpenCodeConfig(options): OpenCodeConfigDocument

Same options as above, but returns a full document with $schema and the provider.omniroute wrapper, ready to write to opencode.json.

normalizeBaseURL(input): string

Exported for completeness. Strips trailing /, deduplicates a trailing /v1, and re-appends exactly one /v1. Throws on empty / non-URL input.

Constants

• OMNIROUTE_PROVIDER_KEY — "omniroute" (the key used under provider.*).
• OMNIROUTE_PROVIDER_NPM — "@ai-sdk/openai-compatible" (the runtime delegate).
• OPENCODE_CONFIG_SCHEMA — "https://opencode.ai/config.json".
• OMNIROUTE_DEFAULT_OPENCODE_MODELS — readonly list of 4 default model ids.

Custom model catalog

import { createOmniRouteProvider } from "@omniroute/opencode-provider";

createOmniRouteProvider({
  baseURL: "http://localhost:20128",
  apiKey: "sk_omniroute",
  models: ["auto", "claude-opus-4-7", "gpt-5.5"],
  modelLabels: {
    auto: "Auto-Combo (recommended)",
    "claude-opus-4-7": "Claude Opus 4.7",
    "gpt-5.5": "GPT-5.5",
  },
});

Duplicates and empty strings are dropped automatically, and order is preserved.

Troubleshooting

• Requests 404 with /v1/v1/... — you're on an old version (≤1.0.0). Update to ≥0.1.0 of this re-released package. The new build normalises baseURL automatically.
• 401 Invalid API key — your OmniRoute instance has REQUIRE_API_KEY=true but the key you supplied doesn't exist there. Create one via the dashboard or set REQUIRE_API_KEY=false and use sk_omniroute.
• OpenCode complains the provider has no models — supply an explicit models list; the default 4 may be hidden by your provider visibility settings.

Related

• OmniRoute — the AI gateway this plugin targets.
• OpenCode — the agentic CLI consumer.
• @ai-sdk/openai-compatible — the runtime delegate that actually speaks HTTP.

License

MIT — see LICENSE.