# Viper Go Setup

> Set up Viper for Go configuration management with file, env, and flag binding.

- Skill: `a5c-ai/viper-go-setup` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add a5c-ai/viper-go-setup`
- Raw SKILL.md: https://api.skillmd.com/api/skills/a5c-ai/viper-go-setup/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: AI & ML
- Author: a5c-ai (https://skillmd.com/u/a5c-ai)
- Updated: 2026-09-09
- Page: https://skillmd.com/skills/a5c-ai/viper-go-setup

---


# Viper Go Setup

Set up Viper for Go configuration management.

## Generated Patterns

```go
package config

import (
    "github.com/spf13/viper"
    "github.com/spf13/cobra"
)

type Config struct {
    Server   ServerConfig   `mapstructure:"server"`
    Database DatabaseConfig `mapstructure:"database"`
}

type ServerConfig struct {
    Host string `mapstructure:"host"`
    Port int    `mapstructure:"port"`
}

func InitConfig(cfgFile string) (*Config, error) {
    if cfgFile != "" {
        viper.SetConfigFile(cfgFile)
    } else {
        viper.SetConfigName("config")
        viper.SetConfigType("yaml")
        viper.AddConfigPath(".")
        viper.AddConfigPath("$HOME/.myapp")
    }

    viper.AutomaticEnv()
    viper.SetEnvPrefix("MYAPP")

    if err := viper.ReadInConfig(); err != nil {
        if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
            return nil, err
        }
    }

    var cfg Config
    if err := viper.Unmarshal(&cfg); err != nil {
        return nil, err
    }
    return &cfg, nil
}
```

## Target Processes

- configuration-management-system
- cli-application-bootstrap