Configuration Files

ccusage supports JSON configuration files for persistent settings. Configuration files allow you to set default options for all commands or customize behavior for specific commands without repeating options every time.

Quick Start

1. Use Schema for IDE Support

Always include the schema for autocomplete and validation:

{
	"$schema": "https://ccusage.com/config-schema.json"
}

2. Set Common Defaults

Put frequently used options in defaults:

{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"timezone": "UTC",
		"locale": "en-CA",
		"breakdown": true
	}
}

3. Override for Specific Commands

{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"breakdown": false
	},
	"commands": {
		"daily": {
			"breakdown": true // Only daily needs breakdown
		}
	}
}

4. Convert CLI Arguments to Config

If you find yourself repeating CLI arguments:

# Before (repeated CLI arguments)
ccusage daily --breakdown --instances --timezone UTC
ccusage monthly --breakdown --timezone UTC

Convert them to a config file:

// ccusage.json
{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"breakdown": true,
		"timezone": "UTC"
	},
	"commands": {
		"daily": {
			"instances": true
		}
	}
}

Now simpler commands:

ccusage daily
ccusage monthly

Configuration File Locations

ccusage searches for configuration files in these locations (in priority order):

1. Local project: .ccusage/ccusage.json (higher priority)
2. User config: ~/.claude/ccusage.json or ~/.config/claude/ccusage.json (lower priority)

Configuration files are merged in priority order, with local project settings overriding user settings. If you pass a custom config file using --config, it will override both local and user configs. Note that configuration files are not required; if none are found, ccusage will use built-in defaults. Also, if you have multiple config files, only the first one found will be used.

Basic Configuration

Create a ccusage.json file with your preferred defaults:

{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"json": false,
		"mode": "auto",
		"offline": false,
		"timezone": "Asia/Tokyo",
		"locale": "ja-JP",
		"breakdown": true
	}
}

Configuration Structure

Schema Support

Add the $schema property to get IntelliSense and validation in your IDE:

{
	"$schema": "https://ccusage.com/config-schema.json"
}

You can also reference a local schema file after installing ccusage:

{
	"$schema": "./node_modules/ccusage/config-schema.json"
}

Global Defaults

The defaults section sets default values for all commands:

{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"since": "20250101",
		"until": "20250630",
		"json": false,
		"mode": "auto",
		"debug": false,
		"debugSamples": 5,
		"order": "asc",
		"breakdown": false,
		"offline": false,
		"timezone": "UTC",
		"locale": "en-CA",
		"jq": ".data[]"
	}
}

Command-Specific Configuration

Override defaults for specific commands using the commands section:

{
	"$schema": "https://ccusage.com/config-schema.json",
	"defaults": {
		"mode": "auto",
		"offline": false
	},
	"commands": {
		"daily": {
			"instances": true,
			"breakdown": true
		},
		"blocks": {
			"active": true,
			"tokenLimit": "500000"
		}
	}
}

Command-Specific Options

Daily Command

{
	"commands": {
		"daily": {
			"instances": true,
			"project": "my-project",
			"breakdown": true,
			"since": "20250101",
			"until": "20250630"
		}
	}
}

Weekly Command

{
	"commands": {
		"weekly": {
			"startOfWeek": "monday",
			"breakdown": true,
			"timezone": "Europe/London"
		}
	}
}

Monthly Command

{
	"commands": {
		"monthly": {
			"breakdown": true,
			"mode": "calculate",
			"locale": "en-US"
		}
	}
}

Session Command

{
	"commands": {
		"session": {
			"id": "abc123-session",
			"project": "my-project",
			"json": true
		}
	}
}

Blocks Command

{
	"commands": {
		"blocks": {
			"active": true,
			"recent": false,
			"tokenLimit": "max",
			"sessionLength": 5,
			"live": false,
			"refreshInterval": 1
		}
	}
}

Statusline

{
	"commands": {
		"statusline": {
			"offline": true,
			"cache": true,
			"refreshInterval": 2
		}
	}
}

Custom Configuration Files

Use the --config option to specify a custom configuration file:

# Use a specific configuration file
ccusage daily --config ./my-config.json

# Works with all commands
ccusage blocks --config /path/to/team-config.json

This is useful for:

• Team configurations - Share configuration files across team members
• Environment-specific settings - Different configs for development/production
• Project-specific overrides - Use different settings for different projects

Configuration Example

For a complete configuration example, see /ccusage.example.json in the repository root, which demonstrates:

• Global defaults configuration
• Command-specific overrides
• All available options with proper types

Configuration Priority

Settings are applied in this priority order (highest to lowest):

1. Command-line arguments (e.g., --json, --offline)
2. Custom config file (specified with --config /path/to/config.json)
3. Local project config (.ccusage/ccusage.json)
4. User config (~/.config/claude/ccusage.json)
5. Legacy config (~/.claude/ccusage.json)
6. Built-in defaults

Example:

// .ccusage/ccusage.json
{
	"defaults": {
		"mode": "calculate"
	}
}

# Config file sets mode to "calculate"
ccusage daily  # Uses mode: calculate

# But CLI argument overrides it
ccusage daily --mode display  # Uses mode: display

Debugging Configuration

Use the --debug flag to see configuration loading details:

# Debug configuration loading
ccusage daily --debug

# Debug custom config file
ccusage daily --debug --config ./my-config.json

Debug output shows:

• Which config files are checked and found
• Schema and option details from loaded configs
• How options are merged from different sources
• Final values used for each option

Example debug output:

[ccusage] ℹ Debug mode enabled - showing config loading details

[ccusage] ℹ Searching for config files:
  • Checking: .ccusage/ccusage.json (found ✓)
  • Checking: ~/.config/claude/ccusage.json (found ✓)
  • Checking: ~/.claude/ccusage.json (not found)

[ccusage] ℹ Loaded config from: .ccusage/ccusage.json
  • Schema: https://ccusage.com/config-schema.json
  • Has defaults: yes (3 options)
  • Has command configs: yes (daily)

[ccusage] ℹ Merging options for 'daily' command:
  • From defaults: mode="auto", offline=false
  • From command config: instances=true
  • From CLI args: debug=true
  • Final merged options: {
      mode: "auto" (from defaults),
      offline: false (from defaults),
      instances: true (from command config),
      debug: true (from CLI)
    }

Best Practices

Version Control

For project configs, commit .ccusage/ccusage.json to version control:

# Add to git
git add .ccusage/ccusage.json
git commit -m "Add ccusage configuration"

Document Team Configs

Add comments using a README alongside team configs:

team-configs/
├── ccusage.json
└── README.md  # Explain configuration choices

Troubleshooting

Config Not Being Applied

1. Check file location is correct
2. Verify JSON syntax is valid
3. Use --debug to see loading details
4. Ensure option names match exactly

Invalid JSON

Use a JSON validator or IDE with JSON support:

# Validate JSON syntax
jq . < ccusage.json

Schema Validation Errors

Ensure option values match expected types:

{
	"defaults": {
		"tokenLimit": "500000", // ✅ String or number
		"active": true, // ✅ Boolean
		"refreshInterval": 2 // ✅ Number
	}
}

Related Documentation

• Command-Line Options - Available CLI arguments
• Environment Variables - Environment configuration
• Configuration Overview - Complete configuration guide