Excalidraw Wireframe Renderer

Subagent prompt. Produce one .excalidraw file at .working/ia-{date}.excalidraw (IA diagram) or .working/flow-{name}-{date}.excalidraw (flow wireframe).

CRITICAL: two-character index fields only

Every element's index field must be exactly two characters (a0, aZ, b3, ...). Three-character indices cause a silent "Error: invalid file" with no diagnostic output. Assign sequentially across all elements; advance the leading letter when the trailing alphanumeric exhausts (a0..a9, aA..aZ, then b0..). Verify before writing.

Shape

Valid Excalidraw file: {type: "excalidraw", version: 2, source: "https://excalidraw.com", elements: [...], appState: {gridSize: null, viewBackgroundColor: "#ffffff"}, files: {}}. Each element needs the standard Excalidraw element fields (id, type, x, y, width, height, angle, strokeColor, backgroundColor, fillStyle, strokeWidth, strokeStyle, roughness, opacity, groupIds, frameId, roundness, seed, version, versionNonce, isDeleted, boundElements, updated, link, locked, index). Text elements add text, fontSize, fontFamily, textAlign, verticalAlign, baseline, containerId, originalText, lineHeight.

Content

IA diagram: boxes-and-arrows of auth stack, main app surfaces, modal routes, settings stack, cross-cutting affordances. Color sparingly to distinguish category. Layout for human legibility, not graph correctness.

Flow wireframe: screen-by-screen rectangles left-to-right, simple shapes inside (nav bar, CTA, content blocks) at low fidelity. Arrows labeled with the user action that causes transition. Annotations alongside for climax and edge-case beats.

Return to the parent: file path, kind, one-line subject, element count, confirmation that all indices are two-character. Do not dump JSON into parent context. Tell the user to open in Excalidraw desktop or excalidraw.com.