Architecture Diagram HTML/SVG

Use this skill to produce standalone HTML files with embedded SVG diagrams that feel like clean presentation slides rather than code-first diagrams.

Output Form

• Default to a standalone HTML file with embedded SVG.
• Prefer sectioned “deck” structure when there are multiple diagrams on one page.
• Use SVG, not Mermaid, for final publication-quality layout control.
• Make the result readable without zooming and understandable by non-engineers.

Visual Style

• Use a PPT-like information design style: warm background, panel cards, soft shadows, rounded nodes, restrained colors.
• Prefer clear Chinese labels when the audience is Chinese-speaking; keep only essential English technical terms.
• Use a small set of semantic colors and keep them consistent across sections.
• Keep arrowheads understated; do not make lines or markers visually aggressive.
• Favor balanced spacing over dense packing. The page should feel edited, not auto-generated.

Diagram Building Workflow

1. Identify the user-facing purpose of each diagram.
2. Reduce the system into a few layers or stages before drawing.
3. Choose the simplest SVG structure that fits:
   • layered architecture
   • runtime flow
   • sequence/timing flow
   • subsystem drill-down
4. Place groups first, then nodes, then arrows, then notes.
5. After layout is stable, localize labels and tighten wording.
6. Do a dedicated arrow and overlap review before finishing.

Node Rules

• Give every node one clear responsibility.
• Keep titles short; if a title is long, widen the node before shrinking text.
• Use subtitle lines for detail; keep them short and scannable.
• Avoid mixing multiple abstraction levels inside one node.
• Align sibling nodes rigorously.

Arrow Rules

• Every arrow must start and end on a node edge, not inside a node.
• Prefer straight lines first. Add bends only to avoid collisions or ambiguity.
• When two arrows connect the same pair of areas, offset them vertically or horizontally.
• Use solid lines for primary runtime/data flow.
• Use dashed lines only for support, configuration, feedback, optional linkage, or on-demand reads.
• If arrows are long, shorten or reroute them so the direction remains obvious.
• Do not let text sit on top of an arrow.

Editing Rules

• When refining an existing SVG, inspect coordinates instead of making semantic guesses.
• If a user reports overlap, fix geometry directly: move nodes, widen boxes, reroute paths, or adjust text anchors.
• If a user questions arrow meaning, verify the actual system relationship in code/docs first, then correct the line.
• Prefer explicit labels over decorative complexity.

Diagram-Specific Guidance

Overall Architecture

• Separate access surfaces, control plane/runtime, capability subsystems, and state/config areas.
• Use enclosing groups to show ownership or subsystem boundaries.
• Keep cross-group arrows sparse and precise.

Runtime Flow

• Emphasize the main path first.
• Put configuration, session state, and plugin/runtime support below the main path as supporting layers.
• Use wording that reads like product behavior, not source code names, unless the source name is important.

Sequence Diagram

• Reduce participants to the minimum needed to explain the flow.
• Name participants by role, not by file/module, unless implementation detail is the point.
• Use loops only where a real repeated interaction exists.
• Move loop labels close to the loop arrow.

Final Review Checklist

Before finishing, read references/review-checklist.md and verify every item.