What problem does it solve? It prevents premature or ungrounded implementation by producing an evidence-based technical design proposal before any code is written, clearly separating observed repository facts from assumptions. ## Core Features & Use Cases - Repository-Grounded Design: Inspects code, tests, configuration, and history to ground proposals in real constraints while never reading secrets or credentials. - Module and Contract Specification: Defines public interfaces, dependency strategies, failure modes, observability, and compatibility for each proposed module. - Alternatives and Validation Planning: Compares materially different designs for consequential decisions and defines approval-gated validation steps. - Use Case: Before adding a new payment integration, use this Skill to analyze the existing codebase, propose module boundaries and test seams, compare two adapter strategies, and produce a design brief for approval. ## Quick Start Ask the assistant to propose a technical design for your planned change, grounded in the current repository, without editing any files.