# Configuration Deployment -- Technical Specification

**Version**: v1.0.0 | **Status**: Active | **Last Updated**: March 2026

## Overview

Provides configuration deployment across multiple environments (development, staging, production, testing) with variable substitution, change analysis, deployment tracking, and rollback support.

## Architecture

Centered on `ConfigurationDeployer`, which manages a registry of `Environment` objects and tracks `ConfigDeployment` records. Deployment records and environment configs are persisted as JSON files in workspace subdirectories.

## Key Classes

### `ConfigurationDeployer`

| Method | Parameters | Returns | Description |
|--------|-----------|---------|-------------|
| `__init__` | `workspace_dir: str \ | None` | `None` Initializes deployer with workspace directory; creates `config_deployments/` and `environments/` subdirs |
| `create_environment` | `name, env_type: EnvironmentType, config_path, variables` | `Environment` | Creates and persists an environment definition |
| `deploy_configuration` | `environment_name, config_files: list[str], deployed_by` | `ConfigDeployment` | Deploys config files to a named environment with change analysis |
| `rollback_deployment` | `deployment_id: str` | `ConfigDeployment` | Creates a rollback deployment record for a previous deployment |
| `get_deployment_status` | `deployment_id: str` | `ConfigDeployment \ | None` Returns deployment record by ID |
| `list_deployments` | `environment: str \ | None` | `list[ConfigDeployment]` Lists deployments, optionally filtered by environment, sorted by time |
| `list_environments` | | `list[Environment]` | Lists all registered environments |
| `get_environment_config` | `environment_name: str` | `Environment \ | None` Returns a single environment by name |

### `DeploymentStatus` (Enum)

Values: `PENDING`, `IN_PROGRESS`, `SUCCESS`, `FAILED`, `ROLLED_BACK`

### `EnvironmentType` (Enum)

Values: `DEVELOPMENT`, `STAGING`, `PRODUCTION`, `TESTING`

### `Environment` (Dataclass)

Fields: `name`, `type: EnvironmentType`, `config_path`, `variables: dict[str, str]`, `secrets: dict[str, str]`, `created_at: datetime`

### `ConfigDeployment` (Dataclass)

Fields: `deployment_id`, `environment`, `config_version`, `status: DeploymentStatus`, `deployed_at`, `deployed_by`, `config_files`, `changes`, `rollback_info`

## Dependencies

- **Internal**: `codomyrmex.exceptions.CodomyrmexError`, `codomyrmex.logging_monitoring.core.logger_config`
- **External**: `json` (stdlib), `pathlib` (stdlib), `datetime` (stdlib)

## Constraints

- Environment variable substitution supports `${KEY}` and `$KEY` placeholder syntax in config file content.
- Deployment IDs are deterministic: `deploy_{env_name}_{unix_timestamp}`.
- Failed deployments are still persisted to disk for audit purposes.
- Zero-mock: real filesystem operations only, `NotImplementedError` for unimplemented paths.

## Error Handling

- All deployment failures are logged via `logger.error` and the deployment status is set to `FAILED` before the exception propagates.
- Missing environments raise `CodomyrmexError`.

## Navigation

- **Self**: `SPEC.md`
- **Parent**: [../README.md](../README.md)
- **Readme**: [README.md](README.md)
- **Agents**: [AGENTS.md](AGENTS.md)
- **Repository Root**: [README.md](../../../../README.md)
