What problem does it solve? Writing documentation, proposals, and specs alone often produces documents that make sense to the author but confuse readers. This Skill structures the co-authoring process so context is fully transferred, each section is refined iteratively, and blind spots are caught before others read the document. ## Core Features & Use Cases - Three-Stage Workflow: Context Gathering (info dumps and clarifying questions), Refinement & Structure (section-by-section brainstorming, curation, and drafting), and Reader Testing (validating the doc with a fresh, context-free reviewer). - Section-by-Section Drafting: Brainstorms 5-20 options per section, lets you curate what to keep, then drafts and refines through surgical edits. - Reader Testing: Predicts questions real readers would ask and tests the document against a fresh reviewer to expose ambiguity, false assumptions, and contradictions. - Use Case: You need to write a decision doc for a technical migration. The Skill gathers your full context, helps you draft each section iteratively, then verifies the doc stands on its own before you share it with stakeholders. ## Quick Start Help me write a design doc for our new caching layer using the structured co-authoring workflow.