feat: improved the Claude Kit as a plugin

CLAUDE.md

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+# Claudekit Plugin
+
+This is the claudekit plugin — a comprehensive toolkit for Claude Code with 44 skills, 20 agents, and an interactive setup wizard.
+
+## Plugin Structure
+
+- `skills/` — 44 auto-triggered skills (invoked as `/claudekit:<name>`)
+- `agents/` — 20 specialized agents (invoked as `claudekit:<name>`)
+- `scripts/` — Hook scripts installed via `/claudekit:init`
+- `skills/init/templates/` — Templates for rules, modes, hooks, and MCP configs
+
+## Setup
+
+After installing the plugin, run `/claudekit:init` to scaffold project-level configuration (rules, modes, hooks, MCP servers) into your project's `.claude/` directory.
+
+## Skills
+
+Skills auto-trigger based on context. Key categories:
+
+- **Tech Stack**: languages, backend-frameworks, frontend, frontend-styling, databases, devops, testing
+- **Domain**: openapi, owasp, playwright, error-handling, state-management, logging, caching, api-client
+- **Patterns**: authentication, background-jobs, writing-concisely
+- **Workflows**: feature-workflow, git-workflows, documentation, refactoring, performance-optimization, mode-switching, session-management
+- **Methodology**: brainstorming, writing-plans, executing-plans, test-driven-development, systematic-debugging, verification-before-completion, and more
+
+## Conventions
+
+- Skills use YAML frontmatter with `name`, `description`, and optional `user-invocable`, `argument-hint`, `disable-model-invocation`
+- Agents use markdown frontmatter with `name`, `description`, `model`, `tools`, `disallowedTools`
+- Hook scripts follow "fail open" pattern — errors never block work
+- Templates in `skills/init/templates/` are copied to the user's project, not loaded as plugin context