Implementation Plan Creator

Creates implementation plans that define how to execute a project — phases, tasks, sequencing, testing, and milestones. Does not define system architecture. References a technical design when one exists.

Core Principle: Vertical Slices

Structure every plan as vertical slices following the tracer bullet strategy. Each phase delivers a thin but complete slice through all layers.

• Phase 1 is always the tracer bullet: the simplest possible end-to-end flow that proves the architecture works
• Every phase produces a deployable increment that can be demonstrated and validated
• Testing is embedded in each phase — never deferred to a standalone phase
• No phase is purely "setup" or "infrastructure" without user-visible functionality

Task ID Convention

Task IDs are derived from the feature slug and are unique across the entire plan. Format: PREFIX-PN-NN

• PREFIX — feature slug uppercased and shortened to 3–5 characters (e.g. user-onboarding → ONBD, payment-refunds → PAY)
• PN — phase number (e.g. P1, P2)