opencode/packages/sdk/tsc-multi.json

{
  "targets": [
    {
      "extname": ".js",
      "module": "commonjs",
      "shareHelpers": "internal/tslib.js"
    },
    {
      "extname": ".mjs",
      "module": "esnext",
      "shareHelpers": "internal/tslib.mjs"
    }
  ],
  "projects": ["tsconfig.build.json"]
}