Module Not Found: @foundry/functions-api in TypeScript v2 Repository

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1

Issue Description:
I am following the “Building Your First Ontology Function” speedrun. In a new TypeScript v2 repository, the environment is failing to resolve @foundry/functions-api and @foundry/ontology-api.

Error Message:
Cannot find module '@foundry/functions-api' or its corresponding type declarations.

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Details & Context:

  • Environment: Code Repositories, TypeScript v2.

  • Steps Taken:

    • Import Ontology resources (Clinic, Financial) via the Resource Imports side panel.

    • Restarted Code Assist and refreshed the browser multiple times.

    • Verified functions.json has enableResourceGeneration: true.

  • Observations: Even after adding resources, the “Generating Types” progress bar completes, but the red squiggles remain on the @foundry imports. The environment appears unable to “materialize” the virtual packages required for the logic.

Desired Outcome:
Seeking guidance on forcing the TypeScript v2 language server to correctly index these virtual modules or identifying if there is a known compatibility issue with specific versions of the Functions API in v2.

2

Hi ConnorOrzen,

Thanks for sharing this issue here. This learn course requires the use of Typescript Functions V1 instead of V2, this will be why you are seeing the following errors here.

I would suggest restarting the course and choosing Typescript Functions V1 as per the attached screenshot.

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If you are still unable to resolve the error then I would suggest reaching out to training-feedback@palantir.com

Kind regards, Luke

3

Thank you so much for the solution! That fixed the immediate environment issue.

Out of curiosity, I was specifically trying to replicate the ‘Building Your First Ontology Function’ logic within a TypeScript v2 repository to see how the speedrun holds up in a more current environment. Since the platform defaults new repositories to this version now, I wanted to figure out the bridge between the tutorial’s legacy syntax and the modern OSDK requirements so I could help others who encounter the same version gap.

Thanks again!