How should sensitive data like API keys be handled?

The skill provides a pattern for 'Sensitive Data' that ensures secrets are loaded exclusively from environment variables and skipped during file-based serialization to prevent accidental leakage.

How does the skill handle cross-platform directory standards?

It implements the XDG Base Directory specification using the 'directories' crate to ensure your application correctly uses ~/.config on Linux, Application Support on macOS, and AppData on Windows.

What is the recommended configuration file format for Rust CLIs?

This skill recommends TOML due to its balance of human readability, support for comments, and excellent error messaging, though it also provides patterns for YAML and JSON.

What is the order of configuration precedence?

The skill follows a high-to-low priority hierarchy: CLI arguments, then environment variables, followed by project-specific config, user config, system config, and finally hard-coded defaults.

Rust CLI Configuration

Name: Rust CLI Configuration
Author: geoffjay

bygeoffjay

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개발자 도구

Implements robust configuration management systems for Rust command-line applications following industry standards and best practices.

소개

This skill provides specialized patterns and implementation guidance for managing configuration in Rust CLI tools. It helps developers establish a standardized configuration precedence order—integrating hard-coded defaults, system and user-level config files, project-specific settings, environment variables, and CLI arguments. By leveraging industry-standard crates like config, directories, and clap, it ensures your application follows the XDG Base Directory specification for cross-platform compatibility while supporting multiple formats like TOML, YAML, and JSON. It also includes advanced patterns for configuration validation, automated default generation, and versioned migrations.

주요 기능

Multi-format support for TOML, YAML, and JSON configuration files
Early-load configuration validation and versioned migration strategies
XDG Base Directory specification support for cross-platform path management
Integration patterns for environment variables and sensitive secret handling
2 GitHub stars
Standardized configuration precedence logic (CLI > Env > File > Defaults)

사용 사례

Building production-grade Rust CLI tools with persistent user settings
Implementing environment-variable-based configuration for CI/CD and containerized environments
Managing complex application states across Linux, macOS, and Windows using platform-native paths

소개

주요 기능

Multi-format support for TOML, YAML, and JSON configuration files
Early-load configuration validation and versioned migration strategies
XDG Base Directory specification support for cross-platform path management
Integration patterns for environment variables and sensitive secret handling
2 GitHub stars
Standardized configuration precedence logic (CLI > Env > File > Defaults)

사용 사례

Building production-grade Rust CLI tools with persistent user settings
Implementing environment-variable-based configuration for CI/CD and containerized environments
Managing complex application states across Linux, macOS, and Windows using platform-native paths