Mastermind

Test-driven development (TDD) process used when writing code. Use whenever you are adding any new code, unless the programmmer explicitly asks to skip TDD or the code is exploratory/spike.

Standardized process for creating meaningful git commits using Arlo's notation

Visualizes tasks as a Discovery Tree using Mermaid diagrams. Use when planning or tracking multi-step work with parent and child task relationships.

Refactoring process. Invoke immediately when programmer or document mentions refactoring, or proactively when code gets too complex or messy.

Writes tests without mocks using Nullables. Use when writing tests, especially testing code with external I/O (HTTP, files, databases, clocks, random numbers), designing infrastructure wrappers or replacing mocking libraries.

Bash script style guide. Always use when writing bash scripts, shell scripts, or CLI bash tools.