IDK JS npm packages fail runtime import due to missing generated KMP runtime `.mjs` files

[rkreutzer]

I’m integrating Sphereon IDK into an Ionic/Angular holder wallet app and installed the current JS/KMP IDK npm snapshot packages:

{
  "@sphereon/idk-lib-openid-oid4vci-holder-public": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-openid-oid4vci-holder-impl": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-openid-oid4vp-holder-public": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-openid-oid4vp-holder-impl": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-mdoc-core-public": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-mdoc-core-impl": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-sdjwt-public": "^0.25.0-SNAPSHOT-build-365c86e",
  "@sphereon/idk-lib-sdjwt-impl": "^0.25.0-SNAPSHOT-build-365c86e"
}

The packages install successfully and expose TypeScript declarations, but runtime imports fail because generated Kotlin Multiplatform dependency files appear to be missing from node_modules/@sphereon.

Environment

OS: Windows
Shell: PowerShell
Node: v24.14.0
Package manager: yarn 4.13.0
Framework: Ionic/Angular
Target: holder/wallet app using OID4VCI, OID4VP, SIOPv2

Reproduction
From the app root after installing the packages:

node --input-type=module -e "const pkgs=['@sphereon/idk-lib-openid-oid4vci-holder-public','@sphereon/idk-lib-openid-oid4vci-holder-impl','@sphereon/idk-lib-openid-oid4vp-holder-public','@sphereon/idk-lib-openid-oid4vp-holder-impl']; for (const p of pkgs) { try { await import(p); console.log(p+': ok'); } catch (e) { console.log(p+': '+e.message); } }"

Actual result

@sphereon/idk-lib-openid-oid4vci-holder-public: Cannot find module '...\node_modules\@sphereon\kotlin-kotlin-stdlib.mjs' imported from ...\node_modules\@sphereon\idk-lib-openid-oid4vci-holder-public\idk-lib-openid-oid4vci-holder-public.mjs

@sphereon/idk-lib-openid-oid4vci-holder-impl: Cannot find module '...\node_modules\@sphereon\ktor-ktor-client-core.mjs' imported from ...\node_modules\@sphereon\idk-lib-openid-oid4vci-holder-impl\idk-lib-openid-oid4vci-holder-impl.mjs

@sphereon/idk-lib-openid-oid4vp-holder-public: Cannot find module '...\node_modules\@sphereon\kotlin-kotlin-stdlib.mjs' imported from ...\node_modules\@sphereon\idk-lib-openid-oid4vp-holder-public\idk-lib-openid-oid4vp-holder-public.mjs

@sphereon/idk-lib-openid-oid4vp-holder-impl: Cannot find module '...\node_modules\@sphereon\ktor-ktor-client-core.mjs' imported from ...\node_modules\@sphereon\idk-lib-openid-oid4vp-holder-impl\idk-lib-openid-oid4vp-holder-impl.mjs

Expected result
The JS/KMP packages should be importable in a browser/Node/Angular environment, or their package metadata should declare/install the required generated KMP runtime dependencies.

For example, these imports should succeed:

import type { Oid4vciHolderService } from '@sphereon/idk-lib-openid-oid4vci-holder-public'
import '@sphereon/idk-lib-openid-oid4vci-holder-impl'
import type { Oid4vpHolderService } from '@sphereon/idk-lib-openid-oid4vp-holder-public'
import '@sphereon/idk-lib-openid-oid4vp-holder-impl'

Additional details
The package files reference generated sibling runtime modules such as:

import '../kotlin-kotlin-stdlib.mjs'
import '../ktor-ktor-client-core.mjs'
import '../ktor-ktor-client-cio.mjs'
import '../cryptography-kotlin-cryptography-provider-webcrypto.mjs'

But those files are not present under node_modules/@sphereon, and they do not appear to be published as separate @sphereon/* npm packages.

I worked around this temporarily by keeping IDK imports type-only and wrapping runtime imports behind a diagnostic probe so Angular does not statically bundle the incomplete runtime path.

Question
What is the intended bootstrap/import method for using the IDK JS packages from an Ionic/Angular holder wallet app?

Specifically:

1. Are the generated KMP runtime .mjs files supposed to be published inside each IDK package, at node_modules/@sphereon, or as separate dependencies?
2. Is there a higher-level bootstrap package that should be installed for browser/Angular usage?
3. Is there an example holder/wallet JS app showing concrete construction or DI binding of Oid4vciHolderService and Oid4vpHolderService?

Use case: accepting and presenting Verifiable Credentials from a holder/wallet app using OpenID4VC protocols: SIOPv2, OID4VCI, and OID4VP, including JWT VC, SD-JWT VC, and mdoc formats.