Individual skill

plugin-heavy-dep

Use when adding a heavyweight browser dependency (diagram/chart renderers like mermaid, code editors, big wasm-adjacent libs) to a lightweight DSH Web plugin that must stay small, when wiring a lazy-loaded chunk through a host route, when the lazy import intermittently fails or falls back, or when rendering untrusted markup (SVG/HTML) produced by such a dependency.

skills/plugin-heavy-dep/SKILL.md

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Nov 6, 2026
License
MIT

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# Add Heavy Dependencies to a Lightweight DSH Web Plugin

A lightweight Web plugin (small client bundle, no build farm) can still ship a
multi-megabyte renderer — if the heavy code never loads until it is needed and
degrades gracefully when it cannot load. This skill is the integration
checklist; every item below was earned from a real mermaid integration.

## 1. Decide lazy vs inline

If the dependency would multiply the client bundle several-fold and only one
feature needs it (a fence renderer, an editor opened on demand), do NOT inline
it into the client bundle. Split it into a **separate chunk file** the client
imports dynamically only when the feature actually renders.