Skills from anthropics/claude-code

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, or applications. Generates creative, polished code that avoids generic AI aesthetics.

This skill provides guidance for creating Claude Code plugin skills and organizing `scripts/`, `references/`, and `assets/`. It includes explicit shell commands such as `mkdir -p plugin-name/skills/skill-name/{references,examples,scripts}` and `scripts/init_skill.py <skill-name> --path <output-directory>` that instruct executing local scripts.

This skill should be used when the user asks to "create an agent", "add an agent", "write a subagent", "agent frontmatter", "when to use description", "agent examples", "agent tools", "agent colors", "autonomous agent", or needs guidance on agent structure, system prompts, triggering conditions, or agent development best practices for Claude Code plugins.

This skill documents integrating Model Context Protocol (MCP) servers into Claude Code plugins (stdio, SSE, HTTP, ws) with examples and lifecycle guidance. It includes instructions to start local processes (`${CLAUDE_PLUGIN_ROOT}/servers/db-server`), run shell commands (`claude --debug`, `curl`), and use environment variables like `DB_PASSWORD` and `API_TOKEN`.

Provides guidance and examples for implementing Claude Code plugin hooks (prompt and `command` hooks) plus example scripts. It includes explicit `command` hooks such as `bash ${CLAUDE_PLUGIN_ROOT}/scripts/validate.sh` and integrations that call external endpoints (`curl` to `$SLACK_WEBHOOK`) and databases (`psql $DATABASE_URL`).

Dangerous skill: contains explicit directives to run shell commands (e.g., `!`git status`, `!`bash ${CLAUDE_PLUGIN_ROOT}/scripts/build.sh`) and to invoke networked CLIs (e.g., `gh`, `kubectl`). It is a `Command Development` guide for building Claude Code slash commands that uses `${CLAUDE_PLUGIN_ROOT}` and wide `allowed-tools` patterns.

Provides comprehensive guidance and examples for Claude Code plugin structure, manifests, hooks, skills, and MCP server integration. Includes hook commands that run `bash ${CLAUDE_PLUGIN_ROOT}/hooks/scripts/...` scripts, MCP configs referencing env vars such as `${GITHUB_TOKEN}`, and repository URLs like `https://github.com/company/devops-plugin.git`.

Provides patterns, templates, and example scripts for per-project plugin settings stored in `.claude/*.local.md`. Includes runnable shell scripts (e.g., `#!/bin/bash`, `cat > ...`, `tmux send-keys`) that perform file writes, atomic moves, and removals.

Migrate prompts and code from Claude Sonnet 4.0, Sonnet 4.5, or Opus 4.1 to Opus 4.5. Use when the user wants to update their codebase, prompts, or API calls to use Opus 4.5. Handles model string updates and prompt adjustments for known Opus 4.5 behavioral differences. Does NOT migrate Haiku 4.5.