chore: claude repo setup and claude.md updates (#5248)

* chore: add setup_repo command for claude code

* docs: update CLAUDE.md with monorepo guidance

* chore: ignore CLAUDE.local.md

* ci: add .nvmrc

enforce v22, the current lts release

* chore: node 24 it is!

* fix .claude/commands/setup_repo.md

Co-authored-by: Alexander Brown <drjkl@comfy.org>

* fix: .claude/commands/setup_repo.md

Co-authored-by: Alexander Brown <drjkl@comfy.org>

* fix: update CLAUDE.md

Co-authored-by: Alexander Brown <drjkl@comfy.org>

---------

Co-authored-by: Alexander Brown <drjkl@comfy.org>

CLAUDE.md

@@ -1,22 +1,52 @@
 # ComfyUI Frontend Project Guidelines
 
+## Repository Setup
+
+For first-time setup, use the Claude command:
+```
+/setup_repo
+```
+This bootstraps the monorepo with dependencies, builds, tests, and dev server verification.
+
+**Prerequisites:** Node.js >= 24, Git repository, available ports (5173, 6006)
+
 ## Quick Commands
 
 - `pnpm`: See all available commands
+- `pnpm dev`: Start development server (port 5173, via nx)
 - `pnpm typecheck`: Type checking
-- `pnpm lint`: Linting
+- `pnpm build`: Build for production (via nx)
+- `pnpm lint`: Linting (via nx)
 - `pnpm format`: Prettier formatting
 - `pnpm test:component`: Run component tests with browser environment
 - `pnpm test:unit`: Run all unit tests
+- `pnpm test:browser`: Run E2E tests via Playwright
 - `pnpm test:unit -- tests-ui/tests/example.test.ts`: Run single test file
+- `pnpm storybook`: Start Storybook development server (port 6006)
+- `pnpm knip`: Detect unused code and dependencies
+
+## Monorepo Architecture
+
+The project now uses **Nx** for build orchestration and task management:
+
+- **Task Orchestration**: Commands like `dev`, `build`, `lint`, and `test:browser` run via Nx
+- **Caching**: Nx provides intelligent caching for faster rebuilds
+- **Configuration**: Managed through `nx.json` with plugins for ESLint, Storybook, Vite, and Playwright
+- **Dependencies**: Nx handles dependency graph analysis and parallel execution
+
+Key Nx features:
+- Build target caching and incremental builds
+- Parallel task execution across the monorepo
+- Plugin-based architecture for different tools
 
 ## Development Workflow
 
-1. Make code changes
-2. Run tests (see subdirectory CLAUDE.md files)
-3. Run typecheck, lint, format
-4. Check README updates
-5. Consider docs.comfy.org updates
+1. **First-time setup**: Run `/setup_repo` Claude command
+2. Make code changes
+3. Run tests (see subdirectory CLAUDE.md files)
+4. Run typecheck, lint, format
+5. Check README updates
+6. Consider docs.comfy.org updates
 
 ## Git Conventions