Generates comprehensive high-level technical design documentation based on PRDs and API contracts to bridge requirements and implementation.
HLD Design Architect (hld-writer) is a specialized Claude Code skill that streamlines the creation of high-quality High-Level Design (HLD) documents. It acts as an architectural bridge, translating product requirements and interface contracts into concrete technical strategies without overstepping into low-level implementation details. The skill features a rigorous evidence-based workflow that scans existing project documentation to prevent guesswork, ensuring all design decisions are aligned with current technology stacks. It is particularly effective for complex projects, offering automated requirement traceability, architectural visualization via Mermaid, and smart indexing for large features that require multiple design documents.
Key Features
01Support for 1:N splitting of large PRDs into multiple managed HLD documents
02Evidence-based context gathering through automated project document scanning
03Traceability matrix generation to map PRD requirements to HLD design sections
04Automated boundary enforcement to keep HLDs focused on architecture rather than implementation
05Architectural visualization using Mermaid for system flows and component boundaries
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Use Cases
01Coordinating technical design across multiple teams for large-scale product initiatives
02Planning technical refactoring or system optimizations while maintaining existing contracts
03Defining the technical architecture for a new feature after PRD and API contracts are finalized