Visual quality and exact text

Readability

The generator retains each style's palette, material, radius, stroke and motion signature. scripts/style_quality.py strengthens supporting text on its default opaque canvas toward a 4.5:1 contrast target. This is a token-level measurement, not certification for custom fills, translucent glass, font size or every pixel. Inspect the final raster at the intended reading size.

• Flat Icon / Notion / OpenAI: keep quiet white space, make captions and section labels readable instead of using nearly invisible gray.
• Dark Terminal / Ops Pulse: retain accent-coded routes and dark surfaces; lift auxiliary text, not glow intensity. Keep status identifiable by text as well as color.
• Blueprint: preserve the engineering grid, cyan linework and registration details.
• Glassmorphism: keep the panel translucency; test text on the composited panel.
• Claude: retain warm paper and brown hierarchy with readable secondary text.
• C4 Review Canvas: preserve responsibilities and protocols; use both description lines for Chinese as well as spaced words. Never hide an essential responsibility.
• Cloud Fabric: preserve region/VPC nesting; strengthen ownership labels without introducing competing connector colors.
• Event Transit: preserve route directions, station ordering and the distinct DLQ.
• Dark Luxury: keep the AI-authored restrained gold/serif composition; exact text, geometry and visual checks apply just as they do to generated styles.

Text completeness

layout.json.typography reports visible truncation, full source copy and a recovery hint. data-full-text preserves provenance but does not make hidden text visible. Use text_policy: "strict" to reject truncation. Widen the card, use an approved short label, or split views. CJK descriptions wrap at character boundaries rather than discarding the second line. Font width estimates remain heuristic; Noto Sans CJK SC is included as a cross-platform fallback, not bundled or auto-installed.

Export and verification

Prefer the unified export-png command, 1920px by default. Its root-canvas parser supports viewBox-only SVG, decimal/physical dimensions and nonzero SVG origins; the JSON layout generator itself uses origin 0 0. Export rejects oversized images and active/external SVG content. Confirm PNG dimensions and inspect actual text.

Use the public style fixtures for identity, the shared quality-baseline fixtures for comparison, and long-text fixtures/tests for readability. Adding metadata or passing XML checks alone never proves a visually successful diagram.