What problem does it solve? Large feature requests often lead to unstructured implementation, underestimated scope, and horizontal slicing that delays testability. This Skill enforces a disciplined planning workflow that produces thin, independently verifiable vertical slices before any code is written. ## Core Features & Use Cases - Scale Detection: Classifies work as Quick, Standard, or Epic and adjusts planning depth accordingly. - Vertical Slicing with Dependency Graphs: Breaks features into end-to-end slices ordered by dependency, with parallelizable slices marked. - Anti-Rationalization Checks: Flags common agent shortcuts like deferred edge cases, type-first planning, and late testing. - Checkpoint Gates and Risk Register: Defines verifiable gates between phases and documents concrete risks with mitigations. - Use Case: When asked to add a new subsystem to an application, the Skill first reconnoiters the codebase, then writes a feature doc (F-NNN) containing slices, tasks with exact file paths, risks, and gates for review before implementation begins. ## Quick Start Ask the agent to plan the implementation of a new feature, for example: plan adding a scheduled export feature to the settings module.
