workspace_tools 0.12.0

# Task 006: Environment Management

**Priority**: 🌍 Medium-High Impact  
**Phase**: 2 (Ecosystem Integration)  
**Estimated Effort**: 3-4 days  
**Dependencies**: Task 003 (Config Validation), Task 005 (Serde Integration) recommended  

## **Objective**
Implement comprehensive environment management capabilities to handle different deployment contexts (development, staging, production), making workspace_tools the standard choice for environment-aware applications.

## **Technical Requirements**

### **Core Features**
1. **Environment Detection**
   - Automatic environment detection from various sources
   - Environment variable priority system
   - Default environment fallback

2. **Environment-Specific Configuration**
   - Layered configuration loading by environment
   - Environment variable overrides
   - Secure secrets management per environment

3. **Environment Validation**
   - Required environment variable checking
   - Environment-specific validation rules
   - Configuration completeness verification

### **New API Surface**
```rust
impl Workspace {
    /// Get current environment (auto-detected)
    pub fn current_environment(&self) -> Result<Environment>;
    
    /// Load environment-specific configuration
    pub fn load_env_config<T>(&self, config_name: &str) -> Result<T>
    where
        T: serde::de::DeserializeOwned;
    
    /// Load configuration with explicit environment
    pub fn load_config_for_env<T>(&self, config_name: &str, env: &Environment) -> Result<T>
    where
        T: serde::de::DeserializeOwned;
    
    /// Validate environment setup
    pub fn validate_environment(&self, env: &Environment) -> Result<EnvironmentValidation>;
    
    /// Get environment-specific paths
    pub fn env_config_dir(&self, env: &Environment) -> PathBuf;
    pub fn env_data_dir(&self, env: &Environment) -> PathBuf;
    pub fn env_cache_dir(&self, env: &Environment) -> PathBuf;
    
    /// Check if environment variable exists and is valid
    pub fn require_env_var(&self, key: &str) -> Result<String>;
    pub fn get_env_var_or_default(&self, key: &str, default: &str) -> String;
}

#[derive(Debug, Clone, PartialEq)]
pub enum Environment {
    Development,
    Testing,
    Staging,
    Production,
    Custom(String),
}

#[derive(Debug, Clone)]
pub struct EnvironmentValidation {
    pub environment: Environment,
    pub valid: bool,
    pub missing_variables: Vec<String>,
    pub invalid_variables: Vec<(String, String)>, // (key, reason)
    pub warnings: Vec<String>,
}

#[derive(Debug, Clone)]
pub struct EnvironmentConfig {
    pub name: Environment,
    pub required_vars: Vec<String>,
    pub optional_vars: Vec<(String, String)>, // (key, default)
    pub config_files: Vec<String>,
    pub validation_rules: Vec<ValidationRule>,
}

#[derive(Debug, Clone)]
pub enum ValidationRule {
    MinLength { var: String, min: usize },
    Pattern { var: String, regex: String },
    OneOf { var: String, values: Vec<String> },
    FileExists { var: String },
    UrlFormat { var: String },
}
```

### **Implementation Steps**

#### **Step 1: Environment Detection** (Day 1)
```rust
// Add to Cargo.toml
[features]
default = ["enabled", "environment"]
environment = [
    "dep:regex",
    "dep:once_cell",
]

[dependencies]
regex = { version = "1.0", optional = true }
once_cell = { version = "1.0", optional = true }

#[cfg(feature = "environment")]
mod environment {
    use once_cell::sync::Lazy;
    use std::env;
    use crate::{WorkspaceError, Result};
    
    static ENV_DETECTION_ORDER: Lazy<Vec<&'static str>> = Lazy::new(|| vec![
        "WORKSPACE_ENV",
        "APP_ENV", 
        "ENVIRONMENT",
        "ENV",
        "NODE_ENV", // For compatibility
        "RAILS_ENV", // For compatibility
    ]);
    
    impl Environment {
        pub fn detect() -> Result<Environment> {
            // Try environment variables in priority order
            for env_var in ENV_DETECTION_ORDER.iter() {
                if let Ok(value) = env::var(env_var) {
                    return Self::from_string(&value);
                }
            }
            
            // Check for common development indicators
            if Self::is_development_context()? {
                return Ok(Environment::Development);
            }
            
            // Default to development if nothing found
            Ok(Environment::Development)
        }
        
        fn from_string(s: &str) -> Result<Environment> {
            match s.to_lowercase().as_str() {
                "dev" | "development" | "local" => Ok(Environment::Development),
                "test" | "testing" => Ok(Environment::Testing),
                "stage" | "staging" => Ok(Environment::Staging),
                "prod" | "production" => Ok(Environment::Production),
                custom => Ok(Environment::Custom(custom.to_string())),
            }
        }
        
        fn is_development_context() -> Result<bool> {
            // Check for development indicators
            Ok(
                // Debug build
                cfg!(debug_assertions) ||
                // Cargo development mode
                env::var("CARGO_PKG_NAME").is_ok() ||
                // Common development paths
                env::current_dir()
                    .map(|d| d.to_string_lossy().contains("src") || 
                             d.to_string_lossy().contains("dev"))
                    .unwrap_or(false)
            )
        }
        
        pub fn as_str(&self) -> &str {
            match self {
                Environment::Development => "development",
                Environment::Testing => "testing", 
                Environment::Staging => "staging",
                Environment::Production => "production",
                Environment::Custom(name) => name,
            }
        }
        
        pub fn is_production(&self) -> bool {
            matches!(self, Environment::Production)
        }
        
        pub fn is_development(&self) -> bool {
            matches!(self, Environment::Development)
        }
    }
}

#[cfg(feature = "environment")]
impl Workspace {
    pub fn current_environment(&self) -> Result<Environment> {
        Environment::detect()
    }
    
    /// Get environment-specific configuration directory
    pub fn env_config_dir(&self, env: &Environment) -> PathBuf {
        self.config_dir().join(env.as_str())
    }
    
    /// Get environment-specific data directory
    pub fn env_data_dir(&self, env: &Environment) -> PathBuf {
        self.data_dir().join(env.as_str())
    }
    
    /// Get environment-specific cache directory
    pub fn env_cache_dir(&self, env: &Environment) -> PathBuf {
        self.cache_dir().join(env.as_str())
    }
}
```

#### **Step 2: Environment-Specific Configuration Loading** (Day 2)
```rust
#[cfg(all(feature = "environment", feature = "serde_integration"))]
impl Workspace {
    pub fn load_env_config<T>(&self, config_name: &str) -> Result<T>
    where
        T: serde::de::DeserializeOwned + ConfigMerge,
    {
        let env = self.current_environment()?;
        self.load_config_for_env(config_name, &env)
    }
    
    pub fn load_config_for_env<T>(&self, config_name: &str, env: &Environment) -> Result<T>
    where
        T: serde::de::DeserializeOwned + ConfigMerge,
    {
        let config_layers = self.build_config_layers(config_name, env);
        self.load_layered_config(&config_layers)
    }
    
    fn build_config_layers(&self, config_name: &str, env: &Environment) -> Vec<String> {
        vec![
            // Base configuration (always loaded first)
            format!("{}.toml", config_name),
            format!("{}.yaml", config_name),
            format!("{}.json", config_name),
            
            // Environment-specific configuration
            format!("{}.{}.toml", config_name, env.as_str()),
            format!("{}.{}.yaml", config_name, env.as_str()),
            format!("{}.{}.json", config_name, env.as_str()),
            
            // Local overrides (highest priority)
            format!("{}.local.toml", config_name),
            format!("{}.local.yaml", config_name),
            format!("{}.local.json", config_name),
        ]
    }
    
    fn load_layered_config<T>(&self, config_files: &[String]) -> Result<T>
    where
        T: serde::de::DeserializeOwned + ConfigMerge,
    {
        let mut configs = Vec::new();
        
        for config_file in config_files {
            // Try different locations for each config file
            let paths = vec![
                self.config_dir().join(config_file),
                self.env_config_dir(&self.current_environment()?).join(config_file),
                self.join(config_file), // Root of workspace
            ];
            
            for path in paths {
                if path.exists() {
                    match self.load_config_from::<T>(&path) {
                        Ok(config) => {
                            configs.push(config);
                            break; // Found config, don't check other paths
                        }
                        Err(WorkspaceError::PathNotFound(_)) => continue,
                        Err(e) => return Err(e),
                    }
                }
            }
        }
        
        if configs.is_empty() {
            return Err(WorkspaceError::PathNotFound(
                self.config_dir().join(format!("no_config_found_for_{}", 
                    config_files.first().unwrap_or(&"unknown".to_string()))
                )
            ));
        }
        
        // Merge configurations (later configs override earlier ones)
        let mut result = configs.into_iter().next().unwrap();
        for config in configs {
            result = result.merge(config);
        }
        
        Ok(result)
    }
}
```

#### **Step 3: Environment Variable Management** (Day 2-3)
```rust
#[cfg(feature = "environment")]
impl Workspace {
    pub fn require_env_var(&self, key: &str) -> Result<String> {
        std::env::var(key).map_err(|_| {
            WorkspaceError::ConfigurationError(
                format!("Required environment variable '{}' not set", key)
            )
        })
    }
    
    pub fn get_env_var_or_default(&self, key: &str, default: &str) -> String {
        std::env::var(key).unwrap_or_else(|_| default.to_string())
    }
    
    pub fn validate_environment(&self, env: &Environment) -> Result<EnvironmentValidation> {
        let env_config = self.get_environment_config(env)?;
        let mut validation = EnvironmentValidation {
            environment: env.clone(),
            valid: true,
            missing_variables: Vec::new(),
            invalid_variables: Vec::new(),
            warnings: Vec::new(),
        };
        
        // Check required variables
        for required_var in &env_config.required_vars {
            if std::env::var(required_var).is_err() {
                validation.missing_variables.push(required_var.clone());
                validation.valid = false;
            }
        }
        
        // Validate existing variables against rules
        for rule in &env_config.validation_rules {
            if let Err(error_msg) = self.validate_rule(rule) {
                validation.invalid_variables.push((
                    self.rule_variable_name(rule).to_string(),
                    error_msg
                ));
                validation.valid = false;
            }
        }
        
        // Check for common misconfigurations
        self.add_environment_warnings(env, &mut validation);
        
        Ok(validation)
    }
    
    fn get_environment_config(&self, env: &Environment) -> Result<EnvironmentConfig> {
        // Try to load environment config from file first
        let env_config_path = self.config_dir().join(format!("environments/{}.toml", env.as_str()));
        
        if env_config_path.exists() {
            return self.load_config_from(&env_config_path);
        }
        
        // Return default configuration for known environments
        Ok(match env {
            Environment::Development => EnvironmentConfig {
                name: env.clone(),
                required_vars: vec!["DATABASE_URL".to_string()],
                optional_vars: vec![
                    ("LOG_LEVEL".to_string(), "debug".to_string()),
                    ("PORT".to_string(), "8080".to_string()),
                ],
                config_files: vec!["app.toml".to_string()],
                validation_rules: vec![
                    ValidationRule::UrlFormat { var: "DATABASE_URL".to_string() },
                ],
            },
            Environment::Production => EnvironmentConfig {
                name: env.clone(),
                required_vars: vec![
                    "DATABASE_URL".to_string(),
                    "SECRET_KEY".to_string(),
                    "API_KEY".to_string(),
                ],
                optional_vars: vec![
                    ("LOG_LEVEL".to_string(), "info".to_string()),
                    ("PORT".to_string(), "80".to_string()),
                ],
                config_files: vec!["app.toml".to_string()],
                validation_rules: vec![
                    ValidationRule::UrlFormat { var: "DATABASE_URL".to_string() },
                    ValidationRule::MinLength { var: "SECRET_KEY".to_string(), min: 32 },
                    ValidationRule::Pattern { 
                        var: "API_KEY".to_string(), 
                        regex: r"^[A-Za-z0-9_-]{32,}$".to_string() 
                    },
                ],
            },
            _ => EnvironmentConfig {
                name: env.clone(),
                required_vars: vec![],
                optional_vars: vec![],
                config_files: vec!["app.toml".to_string()],
                validation_rules: vec![],
            },
        })
    }
    
    fn validate_rule(&self, rule: &ValidationRule) -> Result<(), String> {
        use regex::Regex;
        
        match rule {
            ValidationRule::MinLength { var, min } => {
                let value = std::env::var(var).map_err(|_| format!("Variable '{}' not set", var))?;
                if value.len() < *min {
                    return Err(format!("Must be at least {} characters", min));
                }
            }
            ValidationRule::Pattern { var, regex } => {
                let value = std::env::var(var).map_err(|_| format!("Variable '{}' not set", var))?;
                let re = Regex::new(regex).map_err(|e| format!("Invalid regex: {}", e))?;
                if !re.is_match(&value) {
                    return Err("Does not match required pattern".to_string());
                }
            }
            ValidationRule::OneOf { var, values } => {
                let value = std::env::var(var).map_err(|_| format!("Variable '{}' not set", var))?;
                if !values.contains(&value) {
                    return Err(format!("Must be one of: {}", values.join(", ")));
                }
            }
            ValidationRule::FileExists { var } => {
                let path = std::env::var(var).map_err(|_| format!("Variable '{}' not set", var))?;
                if !std::path::Path::new(&path).exists() {
                    return Err("File does not exist".to_string());
                }
            }
            ValidationRule::UrlFormat { var } => {
                let value = std::env::var(var).map_err(|_| format!("Variable '{}' not set", var))?;
                // Simple URL validation
                if !value.starts_with("http://") && !value.starts_with("https://") && 
                   !value.starts_with("postgres://") && !value.starts_with("mysql://") {
                    return Err("Must be a valid URL".to_string());
                }
            }
        }
        
        Ok(())
    }
    
    fn rule_variable_name(&self, rule: &ValidationRule) -> &str {
        match rule {
            ValidationRule::MinLength { var, .. } => var,
            ValidationRule::Pattern { var, .. } => var,
            ValidationRule::OneOf { var, .. } => var,
            ValidationRule::FileExists { var } => var,
            ValidationRule::UrlFormat { var } => var,
        }
    }
    
    fn add_environment_warnings(&self, env: &Environment, validation: &mut EnvironmentValidation) {
        match env {
            Environment::Production => {
                if std::env::var("DEBUG").unwrap_or_default() == "true" {
                    validation.warnings.push("DEBUG is enabled in production".to_string());
                }
                if std::env::var("LOG_LEVEL").unwrap_or_default() == "debug" {
                    validation.warnings.push("LOG_LEVEL set to debug in production".to_string());
                }
            }
            Environment::Development => {
                if std::env::var("SECRET_KEY").unwrap_or_default().len() < 16 {
                    validation.warnings.push("SECRET_KEY is short for development".to_string());
                }
            }
            _ => {}
        }
    }
}
```

#### **Step 4: Environment Setup and Initialization** (Day 3-4)
```rust
#[cfg(feature = "environment")]
impl Workspace {
    /// Initialize environment-specific directories and files
    pub fn setup_environment(&self, env: &Environment) -> Result<()> {
        // Create environment-specific directories
        std::fs::create_dir_all(self.env_config_dir(env))
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        std::fs::create_dir_all(self.env_data_dir(env))
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        std::fs::create_dir_all(self.env_cache_dir(env))
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        
        // Create environment info file
        let env_info = serde_json::json!({
            "environment": env.as_str(),
            "created_at": chrono::Utc::now().to_rfc3339(),
            "workspace_root": self.root().to_string_lossy(),
        });
        
        let env_info_path = self.env_config_dir(env).join(".environment");
        std::fs::write(&env_info_path, serde_json::to_string_pretty(&env_info)?)
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        
        Ok(())
    }
    
    /// Create environment template files
    pub fn create_env_templates(&self, env: &Environment) -> Result<()> {
        let env_config = self.get_environment_config(env)?;
        
        // Create .env template file
        let env_template = self.build_env_template(&env_config);
        let env_template_path = self.env_config_dir(env).join(".env.template");
        std::fs::write(&env_template_path, env_template)
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        
        // Create example configuration
        let config_example = self.build_config_example(&env_config);
        let config_example_path = self.env_config_dir(env).join("app.example.toml");
        std::fs::write(&config_example_path, config_example)
            .map_err(|e| WorkspaceError::IoError(e.to_string()))?;
        
        Ok(())
    }
    
    fn build_env_template(&self, env_config: &EnvironmentConfig) -> String {
        let mut template = format!("# Environment variables for {}\n\n", env_config.name.as_str());
        
        template.push_str("# Required variables:\n");
        for var in &env_config.required_vars {
            template.push_str(&format!("{}=\n", var));
        }
        
        template.push_str("\n# Optional variables (with defaults):\n");
        for (var, default) in &env_config.optional_vars {
            template.push_str(&format!("{}={}\n", var, default));
        }
        
        template
    }
    
    fn build_config_example(&self, env_config: &EnvironmentConfig) -> String {
        format!(r#"# Example configuration for {}

[app]
name = "my_application"
version = "0.1.0"

[server]
host = "127.0.0.1"
port = 8080

[database]
# Use environment variables for sensitive data
# url = "${{DATABASE_URL}}"

[logging]
level = "info"
format = "json"

# Environment: {}
"#, env_config.name.as_str(), env_config.name.as_str())
    }
}
```

#### **Step 5: Testing and Integration** (Day 4)
```rust
#[cfg(test)]
#[cfg(feature = "environment")]
mod environment_tests {
    use super::*;
    use crate::testing::create_test_workspace_with_structure;
    use std::env;
    
    #[test]
    fn test_environment_detection() {
        // Test explicit environment variable
        env::set_var("WORKSPACE_ENV", "production");
        let env = Environment::detect().unwrap();
        assert_eq!(env, Environment::Production);
        
        env::set_var("WORKSPACE_ENV", "development");
        let env = Environment::detect().unwrap();
        assert_eq!(env, Environment::Development);
        
        env::remove_var("WORKSPACE_ENV");
    }
    
    #[test]
    fn test_environment_specific_paths() {
        let (_temp_dir, ws) = create_test_workspace_with_structure();
        let prod_env = Environment::Production;
        
        let config_dir = ws.env_config_dir(&prod_env);
        assert!(config_dir.to_string_lossy().contains("production"));
        
        let data_dir = ws.env_data_dir(&prod_env);
        assert!(data_dir.to_string_lossy().contains("production"));
    }
    
    #[test] 
    fn test_layered_config_loading() {
        let (_temp_dir, ws) = create_test_workspace_with_structure();
        
        #[derive(serde::Deserialize, Debug, PartialEq)]
        struct TestConfig {
            name: String,
            port: u16,
            debug: bool,
        }
        
        impl ConfigMerge for TestConfig {
            fn merge(self, other: Self) -> Self {
                Self {
                    name: other.name,
                    port: other.port,
                    debug: other.debug,
                }
            }
        }
        
        // Create base config
        let base_config = r#"
name = "test_app"
port = 8080
debug = true
"#;
        std::fs::write(ws.config_dir().join("app.toml"), base_config).unwrap();
        
        // Create production override
        let prod_config = r#"
port = 80
debug = false
"#;
        std::fs::write(ws.config_dir().join("app.production.toml"), prod_config).unwrap();
        
        // Load production config
        let config: TestConfig = ws.load_config_for_env("app", &Environment::Production).unwrap();
        
        assert_eq!(config.name, "test_app"); // From base
        assert_eq!(config.port, 80); // From production override
        assert_eq!(config.debug, false); // From production override
    }
    
    #[test]
    fn test_environment_validation() {
        let (_temp_dir, ws) = create_test_workspace_with_structure();
        
        // Set up test environment variables
        env::set_var("DATABASE_URL", "postgres://localhost/test");
        env::set_var("SECRET_KEY", "test_secret_key_that_is_long_enough");
        
        let validation = ws.validate_environment(&Environment::Development).unwrap();
        assert!(validation.valid);
        assert!(validation.missing_variables.is_empty());
        
        // Test missing required variable
        env::remove_var("DATABASE_URL");
        let validation = ws.validate_environment(&Environment::Production).unwrap();
        assert!(!validation.valid);
        assert!(validation.missing_variables.contains(&"DATABASE_URL".to_string()));
        
        // Cleanup
        env::remove_var("SECRET_KEY");
    }
    
    #[test]
    fn test_environment_setup() {
        let (_temp_dir, ws) = create_test_workspace_with_structure();
        let prod_env = Environment::Production;
        
        ws.setup_environment(&prod_env).unwrap();
        
        assert!(ws.env_config_dir(&prod_env).exists());
        assert!(ws.env_data_dir(&prod_env).exists());
        assert!(ws.env_cache_dir(&prod_env).exists());
        assert!(ws.env_config_dir(&prod_env).join(".environment").exists());
    }
    
    #[test]
    fn test_required_env_vars() {
        let (_temp_dir, ws) = create_test_workspace_with_structure();
        
        env::set_var("TEST_VAR", "test_value");
        assert_eq!(ws.require_env_var("TEST_VAR").unwrap(), "test_value");
        
        assert!(ws.require_env_var("NONEXISTENT_VAR").is_err());
        
        assert_eq!(ws.get_env_var_or_default("NONEXISTENT_VAR", "default"), "default");
        
        env::remove_var("TEST_VAR");
    }
}
```

### **Documentation Updates**

#### **README.md Addition**
```markdown
## 🌍 environment management

workspace_tools provides comprehensive environment management for different deployment contexts:

```rust
use workspace_tools::{workspace, Environment};

let ws = workspace()?;

// Auto-detect current environment
let env = ws.current_environment()?;

// Load environment-specific configuration
let config: AppConfig = ws.load_env_config("app")?;

// Validate environment setup
let validation = ws.validate_environment(&env)?;
if !validation.valid {
    println!("Missing variables: {:?}", validation.missing_variables);
}
```

**Features:**
- Automatic environment detection from multiple sources
- Layered configuration loading (base -> environment -> local)
- Environment variable validation and requirements
- Environment-specific directory structures
- Production safety checks and warnings
```

#### **New Example: environment_management.rs**
```rust
//! Environment management example

use workspace_tools::{workspace, Environment};
use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize, Debug)]
struct AppConfig {
    name: String,
    port: u16,
    database_url: String,
    debug: bool,
    log_level: String,
}

impl workspace_tools::ConfigMerge for AppConfig {
    fn merge(self, other: Self) -> Self {
        Self {
            name: other.name,
            port: other.port,
            database_url: other.database_url,
            debug: other.debug,
            log_level: other.log_level,
        }
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    let ws = workspace()?;
    
    println!("🌍 Environment Management Demo");
    
    // Detect current environment
    let current_env = ws.current_environment()?;
    println!("Current environment: {:?}", current_env);
    
    // Validate environment
    let validation = ws.validate_environment(&current_env)?;
    if validation.valid {
        println!("✅ Environment validation passed");
    } else {
        println!("❌ Environment validation failed:");
        for var in &validation.missing_variables {
            println!("  Missing: {}", var);
        }
        for (var, reason) in &validation.invalid_variables {
            println!("  Invalid {}: {}", var, reason);
        }
    }
    
    // Show warnings
    if !validation.warnings.is_empty() {
        println!("⚠️  Warnings:");
        for warning in &validation.warnings {
            println!("  {}", warning);
        }
    }
    
    // Load environment-specific configuration
    match ws.load_env_config::<AppConfig>("app") {
        Ok(config) => {
            println!("📄 Configuration loaded:");
            println!("  App: {} (port {})", config.name, config.port);
            println!("  Database: {}", config.database_url);
            println!("  Debug: {}", config.debug);
            println!("  Log level: {}", config.log_level);
        }
        Err(e) => {
            println!("❌ Failed to load config: {}", e);
        }
    }
    
    // Show environment-specific paths
    println!("\n📁 Environment paths:");
    println!("  Config: {}", ws.env_config_dir(&current_env).display());
    println!("  Data: {}", ws.env_data_dir(&current_env).display());
    println!("  Cache: {}", ws.env_cache_dir(&current_env).display());
    
    Ok(())
}
```

### **Success Criteria**
- [ ] Automatic environment detection from multiple sources
- [ ] Layered configuration loading (base -> env -> local)
- [ ] Environment variable validation and requirements
- [ ] Environment-specific directory management
- [ ] Production safety checks and warnings
- [ ] Support for custom environments
- [ ] Comprehensive test coverage
- [ ] Clear error messages for misconfigurations

### **Future Enhancements**
- Docker environment integration
- Kubernetes secrets and ConfigMap support
- Cloud provider environment detection (AWS, GCP, Azure)
- Environment migration tools
- Infrastructure as Code integration
- Environment diff and comparison tools

### **Breaking Changes**
None - this is purely additive functionality with feature flag.

This task makes workspace_tools the definitive solution for environment-aware Rust applications, handling the complexity of multi-environment deployments with ease.