Node v24 breaks this package's module loading on Windows

[bensayswords]

Windows ESM path bug — Node v24 breaks this package's module loading on Windows.

Scenario: building Claude skill within Claude Code on Windows.

Readout:

⎿  Error: Exit code 1
node:internal/modules/esm/load:195
throw new ERR_UNSUPPORTED_ESM_URL_SCHEME(parsed, schemes);
^

 Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]: Only URLs with a scheme in:
 file, data, and node are supported by the default ESM loader. On
 Windows, absolute paths must be valid file:// URLs. Received protocol
 'c:'
     at throwIfUnsupportedURLScheme
 (node:internal/modules/esm/load:195:11)
     at defaultLoadSync (node:internal/modules/esm/load:142:3)
     at #loadAndMaybeBlockOnLoaderThread
 (node:internal/modules/esm/loader:795:12)
     at #loadSync (node:internal/modules/esm/loader:815:49)
     at ModuleLoader.load (node:internal/modules/esm/loader:780:26)
     at ModuleLoader.loadAndTranslate
 (node:internal/modules/esm/loader:526:31)
     at #getOrCreateModuleJobAfterResolve
 (node:internal/modules/esm/loader:571:36)
     at afterResolve (node:internal/modules/esm/loader:624:52)
     at ModuleLoader.getOrCreateModuleJob
 (node:internal/modules/esm/loader:630:12)
     at onImport.tracePromise.__proto__
 (node:internal/modules/esm/loader:649:32) {
   code: 'ERR_UNSUPPORTED_ESM_URL_SCHEME'
 }

 Node.js v24.12.0

 node:internal/modules/esm/load:195
     throw new ERR_UNSUPPORTED_ESM_URL_SCHEME(parsed, schemes);
           ^

 Error [ERR_UNSUPPORTED_ESM_URL_SCHEME]: Only URLs with a scheme in:
 file, data, and node are supported by the default ESM loader. On
 Windows, absolute paths must be valid file:// URLs. Received protocol
 'c:'
     at throwIfUnsupportedURLScheme
 (node:internal/modules/esm/load:195:11)
     at defaultLoadSync (node:internal/modules/esm/load:142:3)
     at #loadAndMaybeBlockOnLoaderThread
 (node:internal/modules/esm/loader:795:12)
     at #loadSync (node:internal/modules/esm/loader:815:49)
     at ModuleLoader.load (node:internal/modules/esm/loader:780:26)
     at ModuleLoader.loadAndTranslate
 (node:internal/modules/esm/loader:526:31)
     at #getOrCreateModuleJobAfterResolve
 (node:internal/modules/esm/loader:571:36)
     at afterResolve (node:internal/modules/esm/loader:624:52)
     at ModuleLoader.getOrCreateModuleJob
 (node:internal/modules/esm/loader:630:12)
     at onImport.tracePromise.__proto__
 (node:internal/modules/esm/loader:649:32) {
   code: 'ERR_UNSUPPORTED_ESM_URL_SCHEME'
 }

 Node.js v24.12.0

[bensayswords]

Fork with fix: https://github.com/bensayswords/xero/tree/fix/windows-esm-cl
ient-credentials

Commit: a99763c — fixes the ERR_UNSUPPORTED_ESM_URL_SCHEME by wrapping the
dynamic import() path in pathToFileURL(). Also includes a
client-credentials auth command as a bonus (no browser needed for M2M
setups).

The key one-liner for the upstream fix:

// bin/xero.js line 10 — before
import(join(__dirname, '..', 'src', 'index.js'));

// after
import(pathToFileURL(join(__dirname, '..', 'src', 'index.js')).href);

^ That's the minimum to unblock Windows users. The client credentials stuff
is extra really but could be useful