Agent Instructions

Package Management

Always check the latest version before installing a package.

Before adding or updating any dependency, verify the current latest version on npm:

npm view <package-name> version

Or check multiple packages at once:

npm view ai version
npm view @ai-sdk/provider-utils version
npm view zod version

This ensures we don't install outdated versions that may have incompatible types or missing features.

AI Gateway

Use AI Gateway string format for models, not provider packages.

Do NOT install or import from provider-specific packages like @ai-sdk/openai, @ai-sdk/anthropic, etc.

Instead, use the AI Gateway string format: {provider}/{model}

// CORRECT - Use AI Gateway strings
import { streamText } from 'ai';

const result = streamText({
  model: 'anthropic/claude-opus-4.5',
  prompt: 'Why is the sky blue?',
});

// INCORRECT - Don't use provider packages
import { anthropic } from '@ai-sdk/anthropic';  // DON'T DO THIS

const result = streamText({
  model: anthropic('claude-opus-4.5'),  // DON'T DO THIS
  prompt: 'Why is the sky blue?',
});

Default model: When examples need a model, default to anthropic/claude-opus-4.5.

Note: @ai-sdk/provider-utils is fine to use for types like ModelMessage, SystemModelMessage, etc.

Source Code Reference

Source code for dependencies is available in opensrc/ for deeper understanding of implementation details.

See opensrc/sources.json for the list of available packages and their versions.

Use this source code when you need to understand how a package works internally, not just its types/interface.

Fetching Additional Source Code

To fetch source code for a package or repository you need to understand, run:

npx opensrc <package>           # npm package (e.g., npx opensrc zod)
npx opensrc pypi:<package>      # Python package (e.g., npx opensrc pypi:requests)
npx opensrc crates:<package>    # Rust crate (e.g., npx opensrc crates:serde)
npx opensrc <owner>/<repo>      # GitHub repo (e.g., npx opensrc vercel/ai)