What problem does it solve? Long design docs, plans, and reports written as plain text are hard to scan and review. This Skill renders them as a single self-contained HTML file with tabbed pages, diagrams, highlighted code, and inline comment threads, so reviewers absorb the content in minutes and leave feedback directly in the document. ## Core Features & Use Cases - Rich document rendering: Authors semantic markup using the pd-* web component library (tabs, mermaid diagrams, code blocks, API outlines, wireframes, CLI transcripts) loaded from a pinned CDN release β no CSS or JavaScript required. - Review workflow: Supports append-only comment threads, human-answerable questions, and authored decision records, with a paste-back protocol for merging reviewer comments exported from the browser. - Headless linting: Ships a Node CLI (scripts/pd-lint.mjs) that validates plan docs for untracked files, missing phase dependencies, dependency cycles, and open questions before handoff. - Use Case: Turn a design proposal into an interactive HTML doc with an architecture mermaid diagram, API outline, and review threads, then lint it and merge reviewer feedback pasted back as a DOC COMMENTS block. ## Quick Start Render this design document as a rich HTML doc with tabs, a mermaid architecture diagram, and a review thread section.