Tdd
Builds features and fixes straightforward reproducible bugs one vertical red-green-refactor slice at a time. Use when implementing or changing user-visible behavior in an existing codebase, including functions, CLI flags, endpoints, output formats, and ordinary bug fixes.
Refactor
Find deepening opportunities — turn shallow modules into deep ones. Use when the user wants to improve a codebase's architecture, consolidate tightly-coupled modules, or make code more testable and AI-navigable.
To Prd
Turn a settled interview/design thread into a PRD document before the context is cleared. Use when a multi-session build has been grilled and needs capturing as a PRD to split into issues; skip for single-session changes that go straight to tdd.
Scaffold
Scaffold a new Python project on the uv + ruff + ty + pytest + prek stack. Use when the user wants to create or bootstrap a new Python project, package, library, CLI, or repo.
Interview
Interview the user relentlessly about a plan or design, resolving each branch of the decision tree until you reach shared understanding. Use when the user wants to stress-test a plan, get grilled on a design, or says "interview" or "grill me".
Debug
Diagnose hard or uncertain bugs, reproduce-first — build a feedback loop before hypothesizing. Use when reproduction or cause is unclear, the failure is intermittent or cross-system, or performance regressed.
Handoff
Compact the live thread into a self-contained markdown file so a fresh session can resume the work. Use when context nears the model's smart-zone mid-phase, when forking off to a separate session, or when the user wants to stop and continue clean later.
To Issues
Split a PRD into independent, agent-ready issues recorded in the project's configured tracker. Use after to-prd on a multi-session build, when the work must become pieces a fresh session can each pick up alone.