shadow-plugin: Instructions file for Codex

Shadow Agent Instructions

Dev environment tips

• Run npm install shadow-plugin (or your preferred package manager) to add the package to your workspace so Vite, ESLint, and TypeScript can see it
• In the CSS file, which includes @import "tailwindcss";, add the following line: @import "shadow-plugin";

CSS (tailwind) class instructions

• Use smooth-shadow, or the size variants smooth-shadow-xs up to smooth-shadow-2xl
• Color the shadow with tokens like shadow-red-500
• For elevated surfaces (dialogs, popovers, cards, menus) use smooth-shadow-ring or the size variants smooth-shadow-ring-xs up to smooth-shadow-ring-2xl, the shadow with a 1px hairline ring baked in; never add a border/ring to the same element
• Color the ring independently from the shadow with smooth-ring-{color}, e.g. smooth-ring-black/10
• The hairline follows the project's --default-ring-width automatically (1px if unset); override --smooth-ring-width only when it must differ from the project ring width
• The utilities carry no !important and follow the normal cascade. If one must win against CSS that outranks it (a component library's own box-shadow), use Tailwind's important modifier on that element — smooth-shadow-md! — rather than a global override
• To replace Tailwind's own shadow scale instead of adding new class names, import shadow-plugin/unprefixed and use the native shadow-{size} utilities (this keeps shadow-md/40 and shadow-{color} working; a @theme { --shadow-md: var(--smooth-shadow-md); } remap does not)

Avoid double borders

• A border-* (or ring-*) next to a shadow-* on the same element draws two stacked edges: a hard line, then the shadow starting just outside it. That double border reads heavy and greyed
• Whenever you would pair a border/ring with a shadow on an elevated surface, use smooth-shadow-ring-{size} instead. It bakes a 1px hairline ring into the shadow's final layer so the edge dissolves into one continuous stroke
• The reusable skill lives at .claude/skills/smooth-shadow-ring/SKILL.md; the Cursor Bugbot rule lives at BUGBOT.md