> **Building with AI coding agents?** Install the authstack plugin with one command. This equips your agent with accurate Scalekit implementation patterns.
>
> **Recommended**:
> ```bash
> npx @scalekit-inc/cli setup
> ```
>
> Global:
> ```bash
> npm install -g @scalekit-inc/cli
> scalekit setup
> ```
>
> Supports Claude Code, Cursor, GitHub Copilot, Codex + skills for 40+ agents.
> Features: full-stack-auth, agent-auth, mcp-auth, modular-sso, modular-scim.
> [Full setup guide](https://docs.scalekit.com/dev-kit/build-with-ai/)

---

# Request modifiers

AgentKit modifiers
Modifiers intercept tool calls to transform inputs or outputs, useful for validation, enrichment, or logging.

```python
# actions comes from the Scalekit client (or your framework adapter)
actions = scalekit_client.actions

@actions.pre_modifier(tool_names=["gmail_fetch_emails"])
def add_default_label(tool_input):
    tool_input.setdefault("label", "UNREAD")
    return tool_input

@actions.post_modifier(tool_names=["gmail_fetch_emails"])
def filter_attachments(tool_output):
    tool_output["emails"] = [e for e in tool_output["emails"] if not e.get("has_attachment")]
    return tool_output
```

| Decorator | Receives | Returns |
|---|---|---|
| `@actions.pre_modifier(tool_names)` | `dict` | Modified `dict` |
| `@actions.post_modifier(tool_names)` | `dict` | Modified `dict` |

`tool_names` accepts a string or a list of strings. Multiple modifiers for the same tool chain in registration order.

---


---

## More Scalekit documentation

| Resource | What it contains | When to use it |
|----------|-----------------|----------------|
| [/llms.txt](/llms.txt) | Structured index with routing hints per product area | Start here — find which documentation set covers your topic before loading full content |
| [/llms-full.txt](/llms-full.txt) | Complete documentation for all Scalekit products in one file | Use when you need exhaustive context across multiple products or when the topic spans several areas |
| [sitemap-0.xml](https://docs.scalekit.com/sitemap-0.xml) | Full URL list of every documentation page | Use to discover specific page URLs you can fetch for targeted, page-level answers |