Phase 1: Core Infrastructure - MistDemo v1.0.0-alpha.4 (#227)

Author: leogdion

.claude/docs/mistdemo/configkeykit-strategy.md

@@ -1,15 +1,24 @@
 # ConfigKeyKit Extension Strategy
 
-This document outlines the configuration architecture for MistDemo using the Swift Configuration package with ConfigKeyKit-style patterns.
+This document outlines the configuration architecture for MistDemo, combining Swift Configuration with a lightweight ConfigKeyKit module.
 
-## Overview
+## Current Implementation
 
-MistDemo extends Swift Configuration to support:
-1. Hierarchical configuration keys
-2. Command-specific configuration
-3. Configuration profiles
-4. Dynamic resolution with priority
-5. Type-safe configuration access
+MistDemo uses a two-module approach:
+1. **ConfigKeyKit** - Lightweight module containing only reusable configuration key types (no dependencies)
+2. **MistDemoConfiguration** - Swift Configuration wrapper in the MistDemo module (requires macOS 15.0+)
+
+## Architecture Decisions
+
+### Module Separation
+- ConfigKeyKit remains dependency-free for maximum reusability
+- MistDemo module contains the Swift Configuration dependency
+- This allows ConfigKeyKit to be used in other projects without forcing Swift Configuration
+
+### Swift Configuration Integration
+- Uses `ConfigReader` with provider hierarchy
+- Currently supports: Environment variables → Defaults
+- Planned: Command-line arguments → Files → Environment → Defaults
 
 ## Architecture
 

.claude/docs/mistdemo/configuration.md

@@ -6,35 +6,42 @@ MistDemo supports flexible configuration through files, profiles, environment va
 
 Configuration is resolved from multiple sources with the following priority (highest to lowest):
 
-1. **Command-line arguments** - Explicit flags like `--database private`
+**Current Implementation:**
+1. **Environment variables** - System environment (e.g., `CLOUDKIT_CONTAINER_ID`)
+2. **Built-in defaults** - Hardcoded fallback values in `InMemoryProvider`
+
+**Planned Additions:**
+1. **Command-line arguments** - Explicit flags like `--database private` (requires CommandLineArgumentsProvider)
 2. **Profile settings** - From `--profile` in configuration file
-3. **Configuration file** - Default values in JSON/YAML file
-4. **Environment variables** - System environment (e.g., `CLOUDKIT_CONTAINER_ID`)
-5. **Built-in defaults** - Hardcoded fallback values
+3. **Configuration file** - Default values in JSON/YAML file (requires FileProvider)
 
 ## Swift Configuration Package
 
-MistDemo uses [swift-configuration](https://github.com/apple/swift-configuration) with these providers:
+MistDemo uses [swift-configuration](https://github.com/apple/swift-configuration) for hierarchical configuration management.
+
+### Requirements
 
-### Required Package Traits
+- **macOS 15.0+** required due to Swift Configuration dependency
+- Swift 6.0 or later
+
+### Package Configuration
 
-Add to your `Package.swift`:
 ```swift
 .package(
     url: "https://github.com/apple/swift-configuration",
-    from: "1.0.0",
-    traits: [.defaults, "CommandLineArguments", "YAML"]
+    from: "1.0.0"
 )
 ```
 
-### Provider Support
+### Current Implementation
 
-| Provider | Trait Required | Purpose |
-|----------|---------------|---------|
-| `JSONSnapshot` | ✗ (included in `.defaults`) | JSON configuration files |
-| `YAMLSnapshot` | ✓ (`"YAML"`) | YAML configuration files |
-| `EnvironmentVariablesProvider` | ✗ (core functionality) | Environment variables |
-| `CommandLineArgumentsProvider` | ✓ (`"CommandLineArguments"`) | CLI argument parsing |
+| Provider | Status | Purpose |
+|----------|--------|---------|  
+| `EnvironmentVariablesProvider` | ✅ Implemented | Environment variables with automatic key transformation |
+| `InMemoryProvider` | ✅ Implemented | Default values |
+| `CommandLineArgumentsProvider` | ⏳ Planned | CLI argument parsing |
+| `FileProvider + JSONSnapshot` | ⏳ Planned | JSON configuration files |
+| `FileProvider + YAMLSnapshot` | ⏳ Planned | YAML configuration files |
 
 ## Configuration File Formats
 
@@ -93,15 +100,23 @@ profiles:
 
 ### Configuration Keys
 
-| Key | Type | Environment Variable | Default | Description |
+**Note**: Swift Configuration automatically transforms keys:
+- Dots (`.`) become underscores (`_`) for environment variables
+- Example: `container.identifier` → `CONTAINER_IDENTIFIER` environment variable
+- When CommandLineArgumentsProvider is added: dots become hyphens for CLI args (`container.identifier` → `--container-identifier`)
+
+| Key | Type | Environment Variable (Auto-transformed) | Default | Description |
 |-----|------|---------------------|---------|-------------|
-| `container_id` | String | `CLOUDKIT_CONTAINER_ID` | Required | Container identifier |
-| `api_token` | String | `CLOUDKIT_API_TOKEN` | Required | API token (secret) |
-| `environment` | String | `CLOUDKIT_ENVIRONMENT` | `development` | CloudKit environment |
-| `database` | String | `CLOUDKIT_DATABASE` | `public` | Database type |
-| `web_auth_token` | String | `CLOUDKIT_WEBAUTH_TOKEN` | | Web auth token (secret) |
-| `key_id` | String | `CLOUDKIT_KEY_ID` | | Server-to-server key ID |
-| `private_key_file` | String | `CLOUDKIT_PRIVATE_KEY_FILE` | | Path to private key |
+| `container.identifier` | String | `CONTAINER_IDENTIFIER` | `iCloud.com.brightdigit.MistDemo` | Container identifier |
+| `api.token` | String | `API_TOKEN` | Empty string | API token (secret) |
+| `environment` | String | `ENVIRONMENT` | `development` | CloudKit environment |
+| `database` | String | `DATABASE` | Varies by auth method | Database type |
+| `web.auth.token` | String | `WEB_AUTH_TOKEN` | | Web auth token (secret) |
+| `key.id` | String | `KEY_ID` | | Server-to-server key ID |
+| `private.key` | String | `PRIVATE_KEY` | | Private key content (secret) |
+| `private.key.file` | String | `PRIVATE_KEY_FILE` | | Path to private key |
+| `host` | String | `HOST` | `127.0.0.1` | Server host for authentication |
+| `port` | Int | `PORT` | `8080` | Server port |
 | `output` | String | `MISTDEMO_OUTPUT` | `json` | Output format |
 | `pretty` | Boolean | `MISTDEMO_PRETTY` | `false` | Pretty print output |
 | `verbose` | Boolean | `MISTDEMO_VERBOSE` | `false` | Verbose logging |

.claude/docs/mistdemo/phases/phase-1-core-infrastructure.md

@@ -34,43 +34,42 @@ protocol MistDemoCommand: AsyncParsableCommand {
 - [ ] Configuration loading hooks
 - [ ] Unit tests for protocol conformance
 
-### 2. ConfigKeyKit Extensions
+### 2. Configuration Management with Swift Configuration
 
-**File**: `Sources/MistDemo/Configuration/ConfigurationManager.swift`
+**Implementation Status**: ✅ Partially Complete
 
-Implement Swift Configuration integration:
+Implemented Swift Configuration integration using Apple's official configuration library:
 
-```swift
-class ConfigurationManager {
-    static let shared = ConfigurationManager()
+**Completed Features:**
+- [x] Environment variable provider (EnvironmentVariablesProvider)
+- [x] In-memory defaults provider (InMemoryProvider)
+- [x] Hierarchical resolution (Environment > Defaults)
+- [x] Type-safe configuration with ConfigReader
+- [x] MistDemoConfiguration wrapper for clean API
+- [x] Automatic key transformation (dots to underscores for env vars)
+- [x] Secret handling for sensitive values
 
-    func loadConfiguration(
-        configFile: String?,
-        profile: String?
-    ) throws -> ConfigReader
-}
-```
+**Files Implemented:**
+- `Sources/MistDemo/Configuration/MistDemoConfiguration.swift` - Swift Configuration wrapper
+- `Sources/MistDemo/Configuration/MistDemoConfig.swift` - Configuration data model
+- `Sources/ConfigKeyKit/` - Reusable configuration key types
 
-**Features:**
-- [x] JSON configuration file support (JSONSnapshot, default trait)
-- [x] YAML configuration file support (YAMLSnapshot, requires "YAML" trait)
-- [x] Environment variable provider (core functionality)
-- [x] Command-line arguments provider (requires "CommandLineArguments" trait)
-- [x] Profile merging
-- [x] Priority resolution (CLI > Profile > File > Environment > Defaults)
+**Pending Features:**
+- [ ] Command-line arguments provider (requires CommandLineArgumentsProvider)
+- [ ] JSON configuration file support (requires FileProvider with JSONSnapshot)
+- [ ] YAML configuration file support (requires FileProvider with YAMLSnapshot)
+- [ ] Profile merging and selection
+- [ ] Full priority resolution (CLI > Profile > File > Environment > Defaults)
 
-**Files:**
-- `Sources/MistDemo/Configuration/ConfigurationManager.swift`
-- `Sources/MistDemo/Configuration/MistDemoConfig.swift`
-- `Sources/MistDemo/Configuration/ConfigError.swift`
+**Note**: Requires macOS 15.0+ due to Swift Configuration dependency.
 
 **Acceptance Criteria:**
 - [ ] Load JSON configuration files
 - [ ] Load YAML configuration files
-- [ ] Read environment variables
+- [x] Read environment variables
 - [ ] Merge profiles with base configuration
-- [ ] Resolve configuration priority correctly
-- [ ] Handle missing configuration gracefully
+- [x] Resolve configuration priority correctly (for implemented providers)
+- [x] Handle missing configuration gracefully
 - [ ] Unit tests for all configuration sources
 - [ ] Integration tests for priority resolution
 
@@ -147,64 +146,69 @@ enum MistDemoError: Error {
 
 ## Package Dependencies
 
-Update `Package.swift`:
+Current `Package.swift` configuration:
 
 ```swift
+platforms: [
+    .macOS(.v15)  // Required for Swift Configuration
+],
 dependencies: [
-    .package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
-    .package(
-        url: "https://github.com/apple/swift-configuration",
-        from: "1.0.0",
-        traits: [.defaults, "CommandLineArguments", "YAML"]
-    ),
-    .package(url: "https://github.com/apple/swift-log", from: "1.5.0"),
     .package(path: "../.."),  // MistKit
+    .package(url: "https://github.com/hummingbird-project/hummingbird.git", from: "2.0.0"),
+    .package(url: "https://github.com/apple/swift-configuration", from: "1.0.0")
 ],
 targets: [
+    .target(
+        name: "ConfigKeyKit",
+        dependencies: []  // Lightweight, no dependencies
+    ),
     .executableTarget(
         name: "MistDemo",
         dependencies: [
-            .product(name: "ArgumentParser", package: "swift-argument-parser"),
-            .product(name: "Configuration", package: "swift-configuration"),
-            .product(name: "Logging", package: "swift-log"),
-            "MistKit",
+            "ConfigKeyKit",
+            .product(name: "MistKit", package: "MistKit"),
+            .product(name: "Hummingbird", package: "hummingbird"),
+            .product(name: "Configuration", package: "swift-configuration")
         ]
-    ),
+    )
 ]
 ```
 
+**Note**: ArgumentParser was removed in favor of direct Swift Configuration usage.
+
 ## File Structure
 
+**Current Implementation:**
 ```
-Sources/MistDemo/
-├── MistDemo.swift              # Main entry point
-├── Commands/
-│   └── CommandProtocol.swift   # Base command protocol
-├── Configuration/
-│   ├── ConfigurationManager.swift
-│   ├── MistDemoConfig.swift
-│   └── ConfigError.swift
-├── Output/
-│   ├── OutputFormatter.swift   # Protocol
-│   ├── JSONFormatter.swift
-│   ├── TableFormatter.swift
-│   ├── CSVFormatter.swift
-│   └── YAMLFormatter.swift
-└── Errors/
-    └── MistDemoError.swift
+Sources/
+├── ConfigKeyKit/               # Reusable configuration key types
+│   ├── ConfigKey.swift
+│   ├── ConfigurationKey.swift
+│   └── OptionalConfigKey.swift
+└── MistDemo/
+    ├── MistDemo.swift          # Main entry point
+    ├── Configuration/
+    │   ├── MistDemoConfiguration.swift  # Swift Configuration wrapper
+    │   └── MistDemoConfig.swift         # Configuration data model
+    ├── Utilities/
+    │   ├── AuthenticationHelper.swift   # Authentication setup logic
+    │   └── AuthenticationResult.swift   # Auth result model
+    └── Errors/
+        └── AuthenticationError.swift    # Authentication errors
 
 Tests/MistDemoTests/
 ├── Configuration/
-│   ├── ConfigurationManagerTests.swift
-│   ├── ProfileMergingTests.swift
-│   └── PriorityResolutionTests.swift
-└── Output/
-    ├── JSONFormatterTests.swift
-    ├── TableFormatterTests.swift
-    ├── CSVFormatterTests.swift
-    └── YAMLFormatterTests.swift
+│   └── (Tests pending)
+└── Utilities/
+    └── (Tests pending)
 ```
 
+**Pending Implementation:**
+- Command protocol structure
+- Output formatters (JSON, Table, CSV, YAML)
+- Comprehensive error handling
+- Test coverage
+
 ## Testing Requirements
 
 ### Unit Tests