opencode-provider-litellm

--- package/package.json (excerpt) ---
{
  "name": "opencode-provider-litellm",
  "version": "0.2.0",
  "description": "OpenCode plugin for any LiteLLM proxy — auto-discovers models, auth, and capabilities",
  "type": "module",
  "exports": {
    ".": "./src/index.ts",
    "./server": "./src/index.ts"
  },
  "files": [
    "src"
  ],
  "scripts": {
    "typecheck": "tsc --noEmit",
    "test": "vitest",
    "test:run": "vitest run",
    "build": "tsc --noEmit && esbuild src/index.ts --bundle --outfile=dist/litellm.js --platform=node --target=node20 --format=esm --external:node:* --packages=external"
  },
  "keywords": [
    "opencode",
    "llm",
    "plugin",
    "litellm"
  ],
  "license": "MIT",
  "author": "Daniel Cherubini",
  "repository": {
    "type": "git",
    "url": "git+https://github.com/danielcherubini/opencode-provider-litellm.git"
  },
  "engines": {
    "opencode": ">=1.14.0"
  },
  "dependencies": {
    "@opencode-ai/plugin": "latest"
  },
  "devDependencies": {
    "typescript": "^5.7.0",
    "@types/node": "^22.0.0",
    "vitest": "^3.0.0",
    "@vitest/coverage-v8": "^3.0.0",
    "esbuild": "^0.27.0"
  }
}


--- package/src/utils.ts (excerpt) ---
import type { LiteLLMModel, OpencodeModelConfig, PluginConfig } from './types.js'

/**
 * Maps a LiteLLM model to OpenCode model config format.
 */
export function mapLiteLLMModel(model: LiteLLMModel): OpencodeModelConfig {
  const maxLen = model.max_model_len ?? 32768
  const reasoning = /qwen3|deepseek-r1|o[134]/i.test(model.id)

  return {
    name: model.id,
    tool_call: true,
    reasoning,
    limit: {
      context: maxLen,
      output: maxLen,
    },
    modalities: {
      input: ['text'],
      output: ['text'],
    },
  }
}

/**
 * Resolves plugin configuration from environment variables or config options.
 *
 * Priority:
 * 1. LITELLM_URL / LITELLM_KEY environment variables
 * 2. Values from opencode.json plugin options
 *
 * Returns null if no source provides both url and apiKey.
 */
export function resolvePluginConfig(rawConfig: unknown): PluginConfig | null {
  const envUrl = typeof process !== 'undefined' ? process.env.LITELLM_URL : undefined
  const envKey = typeof process !== 'undefined' ? process.env.LITELLM_KEY : undefined

  const hasEnvVars = envUrl !== undefined && envUrl.length > 0 &&
                     envKey !== undefined && envKey.length > 0

  if (hasEnvVars) {
    return { url: envUrl, apiKey: envKey }
  }

  // Fall back to config options from opencode.json
  if (rawConfig && typeof rawConfig === 'object' && !Array.isArray(rawConfig)) {
    const obj = rawConfig as Record<string, unknown>
    const configUrl = typeof obj.url === 'string' ? o