Purpose Produce TUI designs that are accurate enough to be treated like product design artifacts: - Render a copy-pastable ASCII TUI. - Output a complete layout/spec block with geometry and style tokens. - Output a Pencil MCP–ready plan: JSON spec + operations (chunked to ≤25 ops). Workflow 1. Parse input — Read the input model JSON (widthCols, grid, props, state, style, typography, layout, hotkeys). 2. Calculate layout — Convert column/row positions to pixel coordinates using the grid (cellWidthPx=8, cellHeightPx=16). 3. Render TUI RENDER — Build the monospace ASCII art with box-drawing char…