Show HN: Grai – A deterministic cadence gate for AI drafts (grai.page)

The newly launched tool, Grai, aims to enhance the authenticity of AI-generated content by offering a "deterministic cadence gate" that analyzes and calibrates a writer's unique voice. By ingesting 5 to 20 previous posts, Grai extracts a "Voice DNA," capturing metrics like median sentence length and rhythm to ensure that generated drafts sound distinctive rather than generic. This tool is particularly significant for content creators who often struggle with standing out in a crowded digital landscape, as it shifts the focus from mere volume of posts to the quality and recognition of their unique voice. Grai operates locally in a simple HTML5 workbench, eliminating cloud dependencies and API fees, and runs a series of fixed checks against established structural rules before drafts are published. It provides targeted suggestions for improving cadence, which can be especially useful for founders and agencies aiming to maintain a consistent and recognizable style without falling into common viral traps identified through extensive analysis of over 134,000 LinkedIn posts. This approach empowers writers to produce more compelling narratives while retaining control over the final output, promoting authentic storytelling in an era saturated with AI-generated content.