Helpers for defining programs and resolving program errors

the complete solution for node.js command-line programs

Resolves Custom Program Errors from Solana program logs or error codes.

Run a child as if it's the foreground process. Give it stdio. Exit when it exits.

Export commander command as a Fig spec

Patch typescript to support custom transformers in tsconfig.json

Extend native Error to create custom errors

Abstract code-execution seam (ctx.codeRuntime) for the DeepSeek Harness

Throw better errors.

Validation for your environment variables

Core utilities for building Solana program clients

A drop-in replacement for fs, making various improvements.

Wrap zod validation errors in user-friendly readable messages

JSON logger for Node.js and browser.

Solana helper functions

Check whether a given string matches the `PotentialCustomElementName` production as defined in the HTML Standard.

Create custom JavaScript errors that also match instanceof.

Executes a command using the environment variables in an env file

vaadin-custom-field

SPL Token Group Interface JS API