# Plan Detail

## Step 0: Implement the task REST API service with FastAPI, including standard CRUD endpoints, HTTP status semantics, request and response models, and structured error handling.

- **Capability:** Build a FastAPI service that exposes validated task CRUD operations and returns appropriate HTTP responses for successful and invalid requests.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** This is the primary deliverable-specific API implementation for the requested tasks resource, not a standalone capability intended for reuse across unrelated future plans.
- **Input schema:** `{'requirements': 'object'}`
- **Output schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'implementation_notes': 'string[]'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)

## Step 1: Add a PostgreSQL persistence layer for the task service using SQLAlchemy models, session management, database initialization or migrations, and durable task storage integrated with the existing API contract.

- **Capability:** Implement task-specific PostgreSQL persistence with validated database models, managed sessions, schema initialization, and CRUD repository operations.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** The persistence implementation is tailored to this API's task schema and deployment; it is part of the deliverable rather than an independently reusable registry agent.
- **Input schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'implementation_notes': 'string[]'}`
- **Output schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'implementation_notes': 'string[]'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)

## Step 2: Define and integrate Pydantic request and response schemas for task fields, status values, identifiers, timestamps, and validation errors across the existing FastAPI service and persistence contract.

- **Capability:** Implement typed Pydantic validation models that enforce the task API's input and output schema, including identifier and timestamp serialization rules.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** These schemas define the requested task API contract and are deliverable content for this service, not a general-purpose reusable capability.
- **Input schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'implementation_notes': 'string[]'}`
- **Output schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'implementation_notes': 'string[]'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)

## Step 3: Add automated pytest coverage for the task API, including CRUD behavior, request and response validation failures, HTTP status semantics, and persistence interactions using isolated test data.

- **Capability:** Create repeatable API tests that exercise validated task CRUD operations, error handling, and database-backed persistence behavior.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** Tests verify this specific task API and its chosen persistence stack, so they belong to the single deliverable.
- **Input schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'implementation_notes': 'string[]'}`
- **Output schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'test_bundle': 'object', 'test_contract': 'object', 'implementation_notes': 'string[]'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)

## Step 4: Containerize the FastAPI task service and PostgreSQL persistence service with Docker Compose, including environment-based configuration, health checks, networking, startup dependencies, and persistent database storage.

- **Capability:** Package the API and database as cooperating Docker Compose services with reproducible configuration, health-aware orchestration, isolated networking, and durable volumes.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** The Compose topology and container configuration are specific to this requested project and are not a standalone reusable registry capability.
- **Input schema:** `{'service_name': 'string', 'source_bundle': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'test_bundle': 'object', 'test_contract': 'object', 'implementation_notes': 'string[]'}`
- **Output schema:** `{'service_name': 'string', 'source_bundle': 'object', 'deployment_bundle': 'object', 'deployment_contract': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'test_bundle': 'object', 'test_contract': 'object', 'implementation_notes': 'string[]'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)

## Step 5: Create project documentation and operational guidance covering local setup, Docker Compose configuration, environment variables, API endpoints, validation and error responses, testing commands, persistence behavior, and relevant best-practice notes.

- **Capability:** Document how to configure, run, use, test, and operate the containerized task REST API and its PostgreSQL dependency.
- **Plan label:** gap
- **Reusable capability:** False
- **Rationale:** Documentation describes and operates this concrete project, so it is deliverable content rather than a reusable capability.
- **Input schema:** `{'service_name': 'string', 'source_bundle': 'object', 'deployment_bundle': 'object', 'deployment_contract': 'object', 'api_contract': 'object', 'persistence_contract': 'object', 'validation_contract': 'object', 'test_bundle': 'object', 'test_contract': 'object', 'implementation_notes': 'string[]'}`
- **Output schema:** `{'service_name': 'string', 'documentation_bundle': 'object', 'documentation_contract': 'object'}`
- **Acceptance criteria:** (none)
- **Success conditions:** (none)