ai-sdk

What this skill does

## Prerequisites

Before searching docs, check if `node_modules/ai/docs/` exists. If not, install **only** the `ai` package using the project's package manager (e.g., `bun add ai`).

Do not install other packages at this stage. Provider packages (e.g., `@ai-sdk/openai`) and client packages (e.g., `@ai-sdk/react`) should be installed later when needed based on user requirements.

### Monorepo path note

In Bun / pnpm / Yarn workspace monorepos, dependencies are usually **not** hoisted to the repo root — they live inside each app's `node_modules/`. If `node_modules/ai/docs/` doesn't exist at the working directory, check workspace locations before assuming docs are missing:

- `apps/*/node_modules/ai/docs/` (e.g. `apps/web/node_modules/ai/docs/`)
- `packages/*/node_modules/ai/docs/`

Glob from the repo root: `apps/*/node_modules/ai/docs/` or `**/node_modules/ai/docs/`. Substitute the resolved path everywhere this skill says `node_modules/ai/docs/` or `node_modules/ai/src/`. The same applies to provider docs at `node_modules/@ai-sdk/<provider>/docs/`.

## Critical: Do Not Trust Internal Knowledge

Everything you know about the AI SDK is outdated or wrong. Your training data contains obsolete APIs, deprecated patterns, and incorrect usage.

**When working with the AI SDK:**

1. Ensure `ai` package is installed (see Prerequisites)
2. Search `node_modules/ai/docs/` and `node_modules/ai/src/` for current APIs
3. If not found locally, search ai-sdk.dev documentation (instructions below)
4. Never rely on memory - always verify against source code or docs
5. **`useChat` has changed significantly** - check [Common Errors](references/common-errors.md) before writing client code
6. **Always fetch current model IDs** - Never use model IDs from memory. A public catalog of current IDs across providers is available at `https://ai-gateway.vercel.sh/v1/models` — useful purely for discovery, not a recommendation to use Gateway as a runtime provider. Example: `curl -s https://ai-gateway.vercel.sh/v1/models | jq -r '[.data[] | select(.id | startswith("anthropic/")) | .id] | reverse | .[]'` (swap `anthropic/` for `openai/`, `google/`, etc.). Use the model with the highest version number (e.g., `claude-sonnet-4-6` over `claude-sonnet-4-5` over `claude-3-5-sonnet`).
7. Run typecheck after changes to ensure code is correct
8. **Be minimal** - Only specify options that differ from defaults. When unsure of defaults, check docs or source rather than guessing or over-specifying.

If you cannot find documentation to support your answer, state that explicitly.

## Finding Documentation

### [email protected]+

Search bundled docs and source in `node_modules/ai/`:

- **Docs**: `grep "query" node_modules/ai/docs/`
- **Source**: `grep "query" node_modules/ai/src/`

Provider packages include docs at `node_modules/@ai-sdk/<provider>/docs/`.

### Earlier versions

1. Search: `https://ai-sdk.dev/api/search-docs?q=your_query`
2. Fetch `.md` URLs from results (e.g., `https://ai-sdk.dev/docs/agents/building-agents.md`)

### Working examples

For runnable provider × feature examples (Anthropic cache-control, OpenAI computer-use, Google grounding, etc.), see [examples.md](references/examples.md). Fetch individual files on demand via WebFetch or `gh api` — do not clone the repo.

## When Typecheck Fails

**Before searching source code**, grep [Common Errors](references/common-errors.md) for the failing property or function name. Many type errors are caused by deprecated APIs documented there.

If not found in common-errors.md:

1. Search `node_modules/ai/src/` and `node_modules/ai/docs/`
2. Search ai-sdk.dev (for earlier versions or if not found locally)

## Building and Consuming Agents

### Creating Agents

Always use the `ToolLoopAgent` pattern. Search `node_modules/ai/docs/` for current agent creation APIs.

**File conventions**: See [type-safe-agents.md](references/type-safe-agents.md) for where to save agents and tools.

**Type Safety**: When consuming agents with `useChat`, always use `InferAgentUIMessage<typeof agent>` for type-safe tool results. See [reference](references/type-safe-agents.md).

### Consuming Agents (Framework-Specific)

Before implementing agent consumption:

1. Check `package.json` to detect the project's framework/stack
2. Search documentation for the framework's quickstart guide
3. Follow the framework-specific patterns for streaming, API routes, and client integration

## References

- [Common Errors](references/common-errors.md) - Renamed parameters reference (parameters → inputSchema, etc.)
- [Type-Safe Agents with useChat](references/type-safe-agents.md) - End-to-end type safety with InferAgentUIMessage
- [DevTools](references/devtools.md) - Local debugging and observability (development only)
- [Canonical Examples](references/examples.md) - Provider × feature working code from vercel/ai/examples