# Architecture Decision Records (ADRs)

This directory contains Architecture Decision Records (ADRs) for the dance-lessons-coach project.

## What is an ADR?

An ADR is a document that captures an important architectural decision made along with its context and consequences.

## Format

Each ADR follows this structure:

```markdown
# [Short title is a few words]

* Status: [Proposed | Accepted | Deprecated | Superseded]
* Deciders: [List of decision makers]
* Date: [YYYY-MM-DD]

## Context and Problem Statement

[Describe the context and problem statement]

## Decision Drivers

* [Driver 1]
* [Driver 2]
* [Driver 3]

## Considered Options

* [Option 1]
* [Option 2]
* [Option 3]

## Decision Outcome

Chosen option: "[Option 1]" because [justification]

## Pros and Cons of the Options

### [Option 1]

* Good, because [argument a]
* Good, because [argument b]
* Bad, because [argument c]

### [Option 2]

* Good, because [argument a]
* Good, because [argument b]
* Bad, because [argument c]

## Links

* [Link type] [Link to ADR]
* [Link type] [Link to ADR]
```

## ADR List

* [0001-go-1.26.1-standard.md](0001-go-1.26.1-standard.md) - Use Go 1.26.1 as the standard Go version
* [0002-chi-router.md](0002-chi-router.md) - Use Chi router for HTTP routing
* [0003-zerolog-logging.md](0003-zerolog-logging.md) - Use Zerolog for structured logging
* [0004-interface-based-design.md](0004-interface-based-design.md) - Adopt interface-based design pattern
* [0005-graceful-shutdown.md](0005-graceful-shutdown.md) - Implement graceful shutdown with readiness endpoints
* [0006-configuration-management.md](0006-configuration-management.md) - Use Viper for configuration management
* [0007-opentelemetry-integration.md](0007-opentelemetry-integration.md) - Integrate OpenTelemetry for distributed tracing
* [0008-bdd-testing.md](0008-bdd-testing.md) - Adopt BDD with Godog for behavioral testing
* [0009-hybrid-testing-approach.md](0009-hybrid-testing-approach.md) - Combine BDD and Swagger-based testing
* [0010-api-v2-feature-flag.md](0010-api-v2-feature-flag.md) - API v2 implementation with feature flag control
* [0011-validation-library-selection.md](0011-validation-library-selection.md) - Selection of go-playground/validator for input validation
* [0012-git-hooks-staged-only-formatting.md](0012-git-hooks-staged-only-formatting.md) - Git hooks format only staged Go files
* [0013-openapi-swagger-toolchain.md](0013-openapi-swagger-toolchain.md) - ✅ OpenAPI/Swagger documentation with swaggo/swag (Implemented)
* [0014-grpc-adoption-strategy.md](0014-grpc-adoption-strategy.md) - Hybrid REST/gRPC adoption strategy
* [0015-cli-subcommands-cobra.md](0015-cli-subcommands-cobra.md) - Cobra CLI framework adoption
* [0016-ci-cd-pipeline-design.md](0016-ci-cd-pipeline-design.md) - CI/CD pipeline architecture
* [0017-trunk-based-development-workflow.md](0017-trunk-based-development-workflow.md) - Trunk-based development workflow
* [0018-user-management-auth-system.md](0018-user-management-auth-system.md) - User management and authentication system
* [0019-postgresql-integration.md](0019-postgresql-integration.md) - PostgreSQL database integration
* [0020-docker-build-strategy.md](0020-docker-build-strategy.md) - Docker Build Strategy: Traditional vs Buildx
* [0021-jwt-secret-retention-policy.md](0021-jwt-secret-retention-policy.md) - JWT Secret Retention Policy with Configurable TTL and Retention
* [0022-rate-limiting-cache-strategy.md](0022-rate-limiting-cache-strategy.md) - Rate Limiting and Cache Strategy with Multi-Phase Implementation

## How to Add a New ADR

1. Create a new file with the next available number (e.g., `0010-new-decision.md`)
2. Follow the template format
3. Update this README.md with the new ADR
4. Commit the changes

## Status Legend

* **Proposed**: Decision is being discussed
* **Accepted**: Decision has been made and implemented
* **Deprecated**: Decision is no longer relevant
* **Superseded**: Decision has been replaced by another ADR