5 builder options across 5 categories.
Architecture patterns and principles
DRY patterns with orbs, reusable commands, executors, and parameterized jobs
CI/CD pipelines and deployment strategies
Deployment workflows, approval gates, environment promotion, and rollback strategies
Performance optimization guidelines
Caching, parallelism, resource classes, Docker layer caching, and build speed strategies
Security best practices
Context management, secret rotation, OIDC authentication, and pipeline hardening
Community-sourced coding standards
Config structure, naming, and organizational patterns for .circleci/config.yml