I cannot get my custom js module classes to export

Context:
Typescript,
custom module with target environment react

source code: https://github.com/bingomanatee/wonderlandlabs-monorepo/tree/main/packages/forestry

continually getting “exports is not defined”

tried setting moudle/target in TSconfig:

{
  "compilerOptions": {    "target": "ESNext",
    "module": "ESNext",    "declaration": true,    "outDir": "./lib",    "downlevelIteration": true,    "isolatedModules": false,    "strict": false,    "moduleResolution": "node",                "types": [
      "jest",
      "node",
      "@types/jest"
    ],     "esModuleInterop": true,    "resolveJsonModule": true,
    "skipLibCheck": true,  },
  "include": [
    "src",
  ],
  "exclude": [
    "node_modules",
    "__tests__
    "lib
    "lib
  ],
  "rules": {
    "@typescript-eslint/ban-ts-comment": false
  }
}

what am I missing?