confident-ai/deepeval

DeepEval for Typescript

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#2,734 opened on Jun 9, 2026

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Description

Hi folks - we recently released our plans for Typescript support, and we could borrow some help if some is available :)

The current /typescript folder already contains and acts as a client wrapper to Confident AI, and currently already supports tracing.

Our goal is to make local evals, simulation, and synthetic data generation, available in Typescript by July 1st.

We're leaving out benchmarks on purpose because we don't believe that's what Typescript users want.

Here are the initial TODOs:

  • Support local evaluation models
  • Support for complete metrics parity, with shared templates
  • Support for unit test based testing workflows (similar to evals iterator, evaluate function, and deepeval test run)

Post July 1st:

  • Support for complete feature parity with regards to synthetic data generation
  • Support for complete feature parity with regards to simulation
  • Support for prompt optimization

If you're interested, please comment below.

Contributor guide

Research direction
Implement unit test based testing workflows in the /typescript folder, mirroring the Python deepeval evaluate function and evals iterator. Focus on local evaluation and metrics parity using shared templates.
Tech stack
typescriptpython
Domain
backendtesting
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
TypeScriptJavaScripttesting frameworks
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50