Design e Frontend

Writes or reviews UX copy — button labels, error messages, empty states, success messages, tooltips, form labels, onboarding text, confirmation dialogs. Voice-consistent, action-led, recovery-oriented. Localizable. No dark patterns.

Transform acceptance criteria into plan-time runnable verification commands (behavioral, API, UI, error, config, data, contract types) with expected evidence shapes, then execute at verify time and assemble evidence bundles with honest completeness subsections (untested paths, known limitations, adversarial cases covered). Use when planning implementation against issue acceptance criteria or verif

Comprehensive guide for building AI agents that interact with Solana blockchain using SendAI's Solana Agent Kit. Covers 60+ actions, LangChain/Vercel AI integration, MCP server setup, and autonomous agent patterns.

This skill should be used when the user asks to "create a skill", "write a skill", "edit a skill", "update a skill", "improve skill description", "add skill to plugin", "organize skill content", "create SKILL.md", "skill frontmatter", "skill structure", "progressive disclosure", or needs guidance on skill development, validation, or best practices for Claude Code plugins and personal skills.

Svelte 5 and SvelteKit: runes reactivity, component composition, routing, data loading, form handling.

Assists with migrating between frameworks or major versions — Express to Fastify, CRA to Vite, Vue 2 to Vue 3, class components to hooks, etc. Creates a migration plan, identifies breaking changes, and provides file-by-file migration order.

Designs an end-to-end user flow before any pixels are drawn — entry point, screens, decisions, branches, error/recovery paths, edge cases, microcopy hooks. Outputs a structured spec engineering and design can build from.

Create high-converting, visually distinctive landing pages. Use when building marketing pages, product launches, SaaS homepages, or any single-page conversion-focused website. Guides section-by-section composition with anti-AI-slop principles.

Pharmacokinetic and pharmacodynamic analysis in R, including NCA, compartmental modeling, and bioequivalence.

Designs REST or GraphQL APIs with endpoint definitions, request/response schemas, error codes, authentication requirements, and OpenAPI spec generation. Use when building new APIs or extending existing ones.

Use when an agent needs to bootstrap ui-evidence in a repo, then discover, configure, or run before/after UI screenshot capture, current UI snapshot capture, local HTML review generation, or git-baseline UI evidence workflows for a web app.

Restart cobrain daemon.