---
title: "max-parameters"
description: "Limit declared functions to eight parameters."
image: "https://strider.gempir.com/og.png"
---

> Documentation Index
> Fetch the complete documentation index at: https://strider.gempir.com/llms.txt
> Use this file to discover all available pages before exploring further.

# max-parameters

**Default severity:** `warning`

Reports function declarations with more than eight parameters. Long parameter
lists are difficult to call correctly and often reveal a missing domain type.
Method receivers are not counted.

Each named parameter counts individually, including names that share a type.
An unnamed parameter field counts as one.

## Bad

```go
func Open(path string, read, write, create, truncate, appendMode, sync, exclusive, temporary bool) error {
	// ...
}
```

The example has nine parameters: `path` plus eight named booleans.

## Good

```go
type OpenOptions struct {
	Read       bool
	Write      bool
	Create     bool
	Truncate   bool
	AppendMode bool
}

func Open(path string, options OpenOptions) error {
	// ...
}
```

Prefer a cohesive options or request type. Do not combine unrelated values
into a struct purely to bypass the rule.

## Configuration

| Option | Type | Default | Description |
| --- | --- | --- | --- |
| `max-parameters` | `int` | `8` | Maximum number of parameters allowed on a function or method. |

```toml
[checks.max-parameters]
max-parameters = 8
```

Source: https://strider.gempir.com/lints/max-parameters/index.mdx