CLAUDE.universal.md - Essential workflow principles and quick reference guide. Start here for core principles and which specific guide to use for different tasks.

CLAUDE.planning.md - Project setup and documentation workflow. Covers PROJECT.md creation, solution planning, and maintaining session continuity.

CLAUDE.investigation.md - Problem-solving and debugging methodology. Root cause analysis, evidence-based investigation, and systematic debugging standards.

CLAUDE.implementation.md - Code development standards and best practices. Code quality guidelines, dependency management, and incremental development workflow.

CLAUDE.testing.md - Testing strategy and quality standards. Contract-based testing, fixture-driven development, and strategic mocking principles.

CLAUDE.troubleshooting.md - Emergency recovery procedures and when things break. Safe recovery commands and escalation guidelines.

CLAUDE.cherry-picking.md - Cross-branch safety patterns and commit cherry-picking strategies. Architecture compatibility analysis and conservative resolution approaches.