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ECC/rules/web/patterns.md
sutazcaandGitHub e05a201258 fix(rules): add paths frontmatter to web rule pack (#2425)
Every other language pack (typescript, react, python, golang, vue, ...) scopes its rules with a paths: YAML frontmatter block, so Claude Code only loads them when matching files are in context. The 7 files in rules/web/ ship without frontmatter, and per the official rules-loading docs (https://code.claude.com/docs/en/memory) rules without a paths field load unconditionally into every session - ~15.5KB of always-on context even in projects with no frontend code.

Add the same frontmatter convention used by the react pack, scoped to web-facing file types (css/scss/sass/less/html/tsx/jsx/vue/svelte).
2026-07-03 20:36:54 -07:00

92 lines
2.1 KiB
Markdown

---
paths:
- "**/*.css"
- "**/*.scss"
- "**/*.sass"
- "**/*.less"
- "**/*.html"
- "**/*.tsx"
- "**/*.jsx"
- "**/*.vue"
- "**/*.svelte"
---
> This file extends [common/patterns.md](../common/patterns.md) with web-specific patterns.
# Web Patterns
## Component Composition
### Compound Components
Use compound components when related UI shares state and interaction semantics:
```tsx
<Tabs defaultValue="overview">
<Tabs.List>
<Tabs.Trigger value="overview">Overview</Tabs.Trigger>
<Tabs.Trigger value="settings">Settings</Tabs.Trigger>
</Tabs.List>
<Tabs.Content value="overview">...</Tabs.Content>
<Tabs.Content value="settings">...</Tabs.Content>
</Tabs>
```
- Parent owns state
- Children consume via context
- Prefer this over prop drilling for complex widgets
### Render Props / Slots
- Use render props or slot patterns when behavior is shared but markup must vary
- Keep keyboard handling, ARIA, and focus logic in the headless layer
### Container / Presentational Split
- Container components own data loading and side effects
- Presentational components receive props and render UI
- Presentational components should stay pure
## State Management
Treat these separately:
| Concern | Tooling |
|---------|---------|
| Server state | TanStack Query, SWR, tRPC |
| Client state | Zustand, Jotai, signals |
| URL state | search params, route segments |
| Form state | React Hook Form or equivalent |
- Do not duplicate server state into client stores
- Derive values instead of storing redundant computed state
## URL As State
Persist shareable state in the URL:
- filters
- sort order
- pagination
- active tab
- search query
## Data Fetching
### Stale-While-Revalidate
- Return cached data immediately
- Revalidate in the background
- Prefer existing libraries instead of rolling this by hand
### Optimistic Updates
- Snapshot current state
- Apply optimistic update
- Roll back on failure
- Emit visible error feedback when rolling back
### Parallel Loading
- Fetch independent data in parallel
- Avoid parent-child request waterfalls
- Prefetch likely next routes or states when justified