---
title: "Authentication & Authorization Implementation Patterns"
type: skill
id: "wshobson-agents/backend-architecture/auth-implementation-patterns"
category: "Engineering"
publisher: "Seth Hobson"
license: "MIT"
source: "https://github.com/wshobson/agents/tree/7e2fb55"
canonical: "https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/auth-implementation-patterns"
open_in_pho: "https://pho.chat/customize?item=wshobson-agents%2Fbackend-architecture%2Fauth-implementation-patterns&utm_source=labs&utm_medium=skill-page&utm_campaign=skills-library"
---

# Authentication & Authorization Implementation Patterns

Master authentication and authorization patterns including JWT, OAuth2, session management, and RBAC to build secure, scalable access control systems. Use when implementing auth systems, securing APIs, or debugging security issues.

Source: Seth Hobson (MIT), copied at a pinned commit. Free to use. Part of the Phở Skills library (https://labs.pho.chat/en/skills).
Skill set: Backend architecture (https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture.md).

## What it covers
- When to Use This Skill
- Core Concepts
  - 1. Authentication vs Authorization
  - 2. Authentication Strategies
- Detailed patterns and worked examples
- Best Practices
- Common Pitfalls

## Other skills in this set
- [Architecture Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/architecture-patterns.md): Implement proven backend architecture patterns including Clean Architecture, Hexagonal Architecture, and Domain-Driven Design. Use this skill when designing clean architecture for a new…
- [CQRS Implementation](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/cqrs-implementation.md): Implement Command Query Responsibility Segregation for scalable architectures. Use when separating read and write models, optimizing query performance, or building event-sourced systems.
- [Event Store Design](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/event-store-design.md): Design and implement event stores for event-sourced systems. Use when building event sourcing infrastructure, choosing event store technologies, or implementing event persistence patterns.
- [Microservices Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/microservices-patterns.md): Design microservices architectures with service boundaries, event-driven communication, and resilience patterns. Use when building distributed systems, decomposing monoliths, or implementing…
- [Projection Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/projection-patterns.md): Build read models and projections from event streams. Use when implementing CQRS read sides, building materialized views, or optimizing query performance in event-sourced systems.
- [Saga Orchestration](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/saga-orchestration.md): Implement saga patterns for distributed transactions and cross-aggregate workflows. Use this skill when implementing distributed transactions across microservices where 2PC is unavailable, designing…
- [Temporal Python Testing Strategies](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/temporal-python-testing.md): Test Temporal workflows with pytest, time-skipping, and mocking strategies. Covers unit testing, integration testing, replay testing, and local development setup. Use when implementing Temporal…
- [Workflow Orchestration Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/workflow-orchestration-patterns.md): Design durable workflows with Temporal for distributed systems. Covers workflow vs activity separation, saga patterns, state management, and determinism constraints. Use when building long-running…
- [FastAPI Project Templates](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/fastapi-templates.md): Create production-ready FastAPI projects with async patterns, dependency injection, and comprehensive error handling. Use when building new FastAPI applications or setting up backend API projects.
- [Error Handling Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/error-handling-patterns.md): Master error handling patterns across languages including exceptions, Result types, error propagation, and graceful degradation to build resilient applications. Use when implementing error handling…
- [SQL Optimization Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/sql-optimization-patterns.md): Master SQL query optimization, indexing strategies, and EXPLAIN analysis to dramatically improve database performance and eliminate slow queries. Use when debugging slow queries, designing database…
- [Node.js Backend Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/nodejs-backend-patterns.md): Build production-ready Node.js backend services with Express/Fastify, implementing middleware patterns, error handling, authentication, database integration, and API design best practices. Use when…
- [.NET Backend Development Patterns](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/dotnet-backend-patterns.md): Master C#/.NET backend development patterns for building robust APIs, MCP servers, and enterprise applications. Covers async/await, dependency injection, Entity Framework Core, Dapper…
- [PostgreSQL Table Design](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/postgresql-table-design.md): Use this skill when designing or reviewing a PostgreSQL-specific schema. Covers best-practices, data types, indexing, constraints, performance patterns, and advanced features
- [Database Migration](https://labs.pho.chat/en/skills/wshobson-agents/backend-architecture/database-migration.md): Execute database migrations across ORMs and platforms with zero-downtime strategies, data transformation, and rollback procedures. Use when migrating databases, changing schemas, performing data…

## Use it
- In Phở: open https://pho.chat/customize?item=wshobson-agents%2Fbackend-architecture%2Fauth-implementation-patterns&utm_source=labs&utm_medium=skill-page&utm_campaign=skills-library and press Try, or add it so Phở loads it whenever a request matches. Phở works with your own API key (OpenAI, Anthropic, Google and others).
- Full instructions (original SKILL.md, unchanged): https://labs.pho.chat/skills/raw/wshobson-agents/backend-architecture/skills/auth-implementation-patterns/SKILL.md
- Original files: https://github.com/wshobson/agents/tree/7e2fb55 (MIT).
- Full machine-readable index: https://labs.pho.chat/skills.json