Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/drag88/claude-dev-framework/frontend-patternsnpx skills add drag88/claude-dev-framework --skill frontend-patternsgit clone --depth 1 https://github.com/drag88/claude-dev-frameworkWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00020 | $0.00887 |
| Opus 5 | $0.00010 | $0.00443 |
| Sonnet 5 | $0.00004 | $0.00177 |
| Haiku 4.5 | $0.00002 | $0.00089 |
Grade A, and why
frontend-patterns scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 113 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Frontend Patterns Skill
Provide guidance on frontend architecture patterns, React best practices, and UI development.
When to Activate
- During frontend implementation tasks
- When building React components
- When implementing state management
- When working on performance optimization
- When handling forms, animations, or accessibility
Pattern Index
Component Patterns
| Pattern | When to Use |
|---|---|
| Composition over Props | Component has 5+ props controlling layout/content |
| Compound Components | Related components share implicit state (Select/Option, Tabs/Tab) |
| Render Props | Component needs to share behavior while letting consumer control rendering |
| Error Boundary | Catching and recovering from render errors |
| Form Handling (RHF + Zod) | Any form with validation requirements |
See
references/react-patterns.mdfor full code examples.
Custom Hooks
| Hook | Purpose |
|---|---|
useToggle |
Boolean state with toggle/setTrue/setFalse |
useAsync |
Async operation with loading/error/data states |
useDebounce |
Debounce rapidly changing values |
useLocalStorage |
Persist state to localStorage with type safety |
See
references/custom-hooks.mdfor implementations.
State Management
| Pattern | When to Use |
|---|---|
| Context + Reducer | Shared state across component tree with complex updates |
| Local state | State used by single component or parent-child |
| URL state | Filters, pagination, search -- anything bookmarkable |
See
references/state-management.mdfor Context + Reducer implementation.
Performance
| Technique | When to Use |
|---|---|
useMemo |
Expensive computations that depend on specific inputs |
useCallback |
Callbacks passed to memoized children |
React.memo |
Components that re-render with same props |
lazy + Suspense |
Route-based or component-based code splitting |
| Virtualization | Lists with 100+ items |
What ships with it
6 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 2d ago First seen · 113 lines · 20 tokens per session scan A ebbc7f86db3e
frontend-patterns is a skill published in the GitHub repository drag88/claude-dev-framework (2 stars, last pushed 1mo ago), licensed MIT. It adds 20 tokens to every session and 887 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
Other skills, from other repositories
chakra-ui-builder
Build responsive, accessible UI components and layouts using Chakra UI v3, install or configure Chakra UI in new and existing projects, and design scalable themes using tokens, semantic tokens, recipes, and slot recipes. Use this skill whenever a user asks to build, create, or generate any UI component, page, form…
row-selection
Maintain rowSelection ID state with stable getRowId, single, multi, subrow, and Shift-range rules, selected row models, handler anchors, and manual-pagination semantics. Load when implementing getToggleSelectedHandler, enableRowRangeSelection, selectChildren, deselectParents, or selected IDs that outlive loaded Row…
material-ui-tailwind
Integrates Material UI with Tailwind CSS v4 using cascade layers (enableCssLayer, @layer order) and documents Tailwind v3 interoperability (preflight, important, injectFirst, portals). Use when combining MUI with Tailwind utilities, slotProps className, or theme token bridges.
r3f-best-practices
React Three Fiber (R3F) and Poimandres ecosystem best practices. Use when writing, reviewing, or optimizing R3F code. Triggers on tasks involving @react-three/fiber, @react-three/drei, zustand, @react-three/postprocessing, @react-three/rapier, or leva.
wrdn-effect-promise-exit
Replace React/effect-atom mutation handlers that use promise-mode plus try/catch with promiseExit and explicit Exit handling. Use when lint or review flags try/catch around useAtomSet mutation calls, especially UI handlers that set error/busy state after a failed mutation.
assistant-ui-primitives
Guide for assistant-ui UI primitives - ThreadPrimitive, ComposerPrimitive, MessagePrimitive. Use when customizing chat UI components.