chore: refresh CLAUDE.md (#14268)

- Updates CLAUDE.md to be more helpful
- Reverse symlink between CLAUDE.md <> AGENTS.md
- Update .gitignore

Author: denolfe

.gitignore

@@ -9,6 +9,8 @@ dist
 # Local AI Agent files
 AGENTS.local.md
 CLAUDE.local.md
+.claude/commands/*.local.md
+.claude/artifacts
 
 # Custom actions
 !.github/actions/**/dist

AGENTS.md

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+CLAUDE.md

AGENTS.md

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+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Structure
+
+Payload is a monorepo structured around Next.js, containing the core CMS platform, database adapters, plugins, and tooling.
+
+### Key Directories
+
+- `packages/` - All publishable packages
+  - `packages/payload` - Core Payload package containing the main CMS logic
+  - `packages/ui` - Admin UI components (React Server Components)
+  - `packages/next` - Next.js integration layer
+  - `packages/db-*` - Database adapters (MongoDB, Postgres, SQLite, Vercel Postgres, D1 SQLite)
+  - `packages/drizzle` - Drizzle ORM integration
+  - `packages/richtext-*` - Rich text editors (Lexical, Slate)
+  - `packages/storage-*` - Storage adapters (S3, Azure, GCS, Uploadthing, Vercel Blob)
+  - `packages/email-*` - Email adapters (Nodemailer, Resend)
+  - `packages/plugin-*` - Additional functionality plugins
+  - `packages/graphql` - GraphQL API layer
+  - `packages/translations` - i18n translations
+- `test/` - Test suites organized by feature area. Each directory contains a granular Payload config and test files
+- `docs/` - Documentation (deployed to payloadcms.com)
+- `tools/` - Monorepo tooling
+- `templates/` - Production-ready project templates
+- `examples/` - Example implementations
+
+### Architecture Notes
+
+- Payload 3.x is built as a Next.js native CMS that installs directly in `/app` folder
+- UI is built with React Server Components (RSC)
+- Database adapters use Drizzle ORM under the hood
+- Packages use TypeScript with strict mode and path mappings defined in `tsconfig.base.json`
+- Source files are in `src/`, compiled outputs go to `dist/`
+- Monorepo uses pnpm workspaces and Turbo for builds
+
+## Build Commands
+
+- `pnpm install` - Install all dependencies (pnpm required - run `corepack enable` first)
+- `pnpm build` or `pnpm build:core` - Build core packages (excludes plugins and storage adapters)
+- `pnpm build:all` - Build all packages
+- `pnpm build:<directory_name>` - Build specific package (e.g. `pnpm build:db-mongodb`, `pnpm build:ui`)
+
+## Development
+
+### Running Dev Server
+
+- `pnpm dev` - Start dev server with default config (`test/_community/config.ts`)
+- `pnpm dev <directory_name>` - Start dev server with specific test config (e.g. `pnpm dev fields` loads `test/fields/config.ts`)
+- `pnpm dev:postgres` - Run dev server with Postgres
+- `pnpm dev:memorydb` - Run dev server with in-memory MongoDB
+
+### Development Environment
+
+- Auto-login is enabled by default with credentials: `dev@payloadcms.com` / `test`
+- To disable: pass `--no-auto-login` flag or set `PAYLOAD_PUBLIC_DISABLE_AUTO_LOGIN=false`
+- Default database is MongoDB (in-memory). Switch to Postgres with `PAYLOAD_DATABASE=postgres`
+- Docker services: `pnpm docker:start` / `pnpm docker:stop` / `pnpm docker:restart`
+
+## Testing
+
+### Running Tests
+
+- `pnpm test` - Run all tests (integration + components + e2e)
+- `pnpm test:int` - Run integration tests (MongoDB, recommended for verifying local changes)
+- `pnpm test:int <directory_name>` - Run specific integration test suite (e.g. `pnpm test:int fields`)
+- `pnpm test:int:postgres` - Run integration tests with Postgres
+- `pnpm test:int:sqlite` - Run integration tests with SQLite
+- `pnpm test:unit` - Run unit tests
+- `pnpm test:e2e` - Run end-to-end tests (Playwright)
+- `pnpm test:e2e:headed` - Run e2e tests in headed mode
+- `pnpm test:e2e:debug` - Run e2e tests in debug mode
+- `pnpm test:components` - Run component tests (Jest)
+- `pnpm test:types` - Run type tests (tstyche)
+
+### Test Structure
+
+Each test directory in `test/` follows this pattern:
+
+```
+test/<feature-name>/
+├── config.ts        # Lightweight Payload config for testing
+├── int.spec.ts      # Integration tests (Jest)
+├── e2e.spec.ts      # End-to-end tests (Playwright)
+└── payload-types.ts # Generated types
+```
+
+Generate types for a test directory: `pnpm dev:generate-types <directory_name>`
+
+## Linting & Formatting
+
+- `pnpm lint` - Run linter across all packages
+- `pnpm lint:fix` - Fix linting issues
+
+## Internationalization
+
+- Translation files are in `packages/translations/src/languages/`
+- Add new strings to English locale first, then translate to other languages
+- Run `pnpm translateNewKeys` to auto-translate new keys (requires `OPENAI_KEY` in `.env`)
+- Lexical translations: `cd packages/richtext-lexical && pnpm translateNewKeys`
+
+## Commit & PR Guidelines
+
+This repository follows [Conventional Commits](https://www.conventionalcommits.org/).
+
+### PR Title Format
+
+`<type>(<scope>): <title>`
+
+- Title must start with lowercase letter
+- Types: `build`, `chore`, `ci`, `docs`, `examples`, `feat`, `fix`, `perf`, `refactor`, `revert`, `style`, `templates`, `test`
+- Prefer `feat` for new features, `fix` for bug fixes
+- Scopes match package names: `db-*`, `richtext-*`, `storage-*`, `plugin-*`, `ui`, `next`, `graphql`, `translations`, etc.
+- Choose most relevant scope if multiple packages modified, or omit scope entirely
+
+Examples:
+
+- `feat(db-mongodb): add support for transactions`
+- `feat(richtext-lexical): add options to hide block handles`
+- `fix(ui): json field type ignoring editorOptions`
+- `feat: add new collection functionality`
+
+### Commit Guidelines
+
+- First commit of branch should follow PR title format
+- Subsequent commits should use `chore` without scope unless specific package is being modified
+- All commits in a PR are squashed on merge using PR title as commit message
+
+## Additional Resources
+
+- LLMS.txt: <https://payloadcms.com/llms.txt>
+- LLMS-FULL.txt: <https://payloadcms.com/llms-full.txt>
+- Node version: ^18.20.2 || >=20.9.0
+- pnpm version: ^9.7.0