diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..c9ff9e4
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,277 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Project Overview
+
+Digital Dabei Job Manager is a WordPress plugin providing a closed job board for "digital dabei Hamburg". External organizations (providers) self-register and manage job listings. Mentors (existing subscribers) view and apply to jobs. All jobs require admin moderation before publication.
+
+**Core principle**: Every job goes through admin approval before mentors see it. The moderation flow is the trust layer protecting mentors from spam.
+
+## Development Environment
+
+- **Platform**: Local WP (WordPress development environment)
+- **WordPress**: 6.0+, PHP 7.4+
+- **Required Plugins**: ACF Pro, Formidable Forms Pro, Elementor Pro
+- **Email**: WP Mail SMTP on production; disabled in Local WP dev environment
+
+## Development Workflow with GSD
+
+**IMPORTANT**: Use `/gsd` commands for all code-related work in this repository.
+
+The GSD (Get Stuff Done) workflow provides:
+- Structured planning and execution phases
+- Automatic verification of changes
+- State management across sessions
+- Parallel execution when possible
+
+Common commands:
+- `/gsd:progress` - Check current state and next steps
+- `/gsd:plan-phase` - Plan implementation for a phase
+- `/gsd:execute-phase` - Execute all plans in a phase
+- `/gsd:help` - View all available GSD commands
+
+## Architecture
+
+### Plugin Entry Point
+
+The plugin follows WordPress singleton pattern with class-based initialization:
+
+1. `ddhh-job-manager.php` - Main plugin file that:
+   - Loads Action Scheduler vendor library **first** (required for async operations)
+   - Defines constants (DDHH_JM_VERSION, DDHH_JM_PLUGIN_DIR, etc.)
+   - Requires all class files from `includes/`
+   - Initializes via `DDHH_JM_Job_Manager::get_instance()` on `plugins_loaded` hook
+
+2. `includes/class-ddhh-job-manager.php` - Singleton orchestrator that initializes all subsystems via `init_hooks()`
+
+### Core Subsystems
+
+The plugin is organized into focused class files in `includes/`:
+
+**Foundation Layer**:
+- `class-post-types.php` - Registers `job_offer` CPT with custom capabilities
+- `class-roles.php` - Manages `ddhh_provider` role with restricted capabilities
+- `class-acf-fields.php` - Programmatically registers ACF field groups for job metadata
+- `class-activator.php` / `class-deactivator.php` - Plugin lifecycle hooks
+
+**User Management**:
+- `class-formidable.php` - Integration layer for all Formidable Forms (registration, job submission, edit, deactivation, application). Uses form keys like 'provider_registration', 'job_submission', etc.
+- `class-access-control.php` - Blocks providers from WP-Admin, enforces login requirements on job archives
+- `class-user-preferences.php` - Manages mentor opt-in preferences for job notifications
+
+**Job Workflows**:
+- `class-dashboard.php` - Provides `[ddhh_provider_dashboard]` shortcode displaying provider's jobs
+- `class-pages.php` - Creates/manages plugin pages (dashboard, login) via option storage
+- `class-archive.php` - Filters job queries to show only published jobs to appropriate users
+- `class-template.php` - Handles single job display and contact form modal
+
+**Notifications & Async Processing**:
+- `class-notifications.php` - Email system triggered by WordPress hooks (`ddhh_job_submitted`, `transition_post_status`, `frm_after_create_entry`)
+- `class-scheduler.php` - Action Scheduler wrapper for async batch email processing (chunks of 50 users)
+
+**Admin Experience**:
+- `class-admin-ui.php` - Enhances admin screens with custom columns, quick links, status indicators
+
+### Custom Roles & Capabilities
+
+**ddhh_provider role**: Restricted role for external organizations
+- Can create/edit/delete only their own `job_offer` posts
+- Cannot access WP-Admin (redirected to frontend dashboard)
+- Can edit their own profile (`profile.php` access allowed)
+
+**Capability mapping** (in `class-post-types.php`):
+- `edit_job_offer` - Owner can edit their own jobs
+- `delete_job_offer` - Owner can delete their own jobs
+- `read_job_offer` - Users can read published jobs
+- Standard WordPress `map_meta_cap` filter enforces ownership
+
+### Formidable Forms Integration
+
+The plugin uses 5 Formidable forms, identified by form keys:
+1. **provider_registration** (F1) - Creates user with `ddhh_provider` role, auto-login
+2. **job_submission** (F2) - Creates `job_offer` post with `pending` status, maps ACF fields
+3. **job_edit** (F3) - Updates existing job (ownership validated), preserves submission date
+4. **job_deactivation** (F4) - Sets status to `draft`, captures deactivation reason
+5. **job_application** (F5) - Mentor applies to job, emails provider contact address
+
+**Form hooks** (`class-formidable.php`):
+- Registration: `frm_after_create_entry` → auto-login → redirect to dashboard
+- Job submission: `frm_after_create_entry` → fires `ddhh_job_submitted` action → admin notification
+- Job edit: `frm_after_update_entry` → fires `ddhh_job_edited` action → admin notification
+- Application: `frm_after_create_entry` → emails provider's contact email from ACF field
+
+### Email Notification System
+
+**Immediate notifications** (`class-notifications.php`):
+- Admin receives email on job submission with edit/view links
+- Admin receives email on job edit with change summary
+- Admin receives email on deactivation with reason
+- Provider receives email when mentor applies (via Formidable)
+
+**Async batch notifications** (`class-scheduler.php`):
+- Mentor notification on job publish uses Action Scheduler
+- Users are queried for `ddhh_jm_notification_optin` meta
+- Batched into groups of 50 to prevent email provider limits
+- Each batch scheduled as separate `ddhh_jm_send_mentor_notification_batch` action
+
+### Access Control Layers
+
+1. **WP-Admin lockout**: Providers redirected to dashboard unless accessing `profile.php` or AJAX
+2. **Dashboard protection**: `template_redirect` hook checks user role, redirects non-providers
+3. **Archive protection**: Jobs require login; only `publish` status shown to mentors
+4. **Single job protection**: Login required to view job details
+5. **Ownership validation**: Forms validate current user owns the job before editing/deactivation
+
+### Template System
+
+**Frontend templates** (`templates/`):
+- `provider-dashboard.php` - Displays provider's jobs in table format with status badges and action links
+
+**Elementor integration**:
+- Job archive uses Elementor Loop Grid (no custom template file)
+- Job detail page uses Elementor single post template with ACF dynamic tags
+- Contact form modal injected via `the_content` filter in `class-template.php`
+
+### Job Lifecycle
+
+```
+Provider submits → pending → Admin reviews → publish → Mentors see + notified
+                                      ↓
+                              Admin can reject → trash
+Provider deactivates → draft (with reason stored in meta)
+```
+
+**Status hooks**:
+- `ddhh_job_submitted` - Fired after new job metadata saved (form entry ID passed)
+- `ddhh_job_edited` - Fired after job update metadata saved (form entry ID passed)
+- `transition_post_status` - Used for publish detection and deactivation detection
+
+### ACF Field Groups
+
+Programmatically registered in `class-acf-fields.php`:
+- **Job Details**: `job_location`, `job_type`, `job_deadline` (date picker), `contact_email`
+- **Deactivation**: `deactivation_reason`, `deactivation_date`
+- **Metadata**: `submission_date` (preserved during edits)
+
+All fields support German labels matching site language.
+
+## Development Workflow
+
+### Testing Locally
+
+Since email is disabled in Local WP, test email functionality by:
+1. Checking Action Scheduler status: WP Admin → Tools → Scheduled Actions
+2. Monitoring logs: `error_log()` calls throughout notification classes
+3. Using a plugin like WP Mail Logging to capture emails during dev
+
+### Working with Forms
+
+Formidable forms are managed through the Formidable UI. When referencing forms in code:
+- Use form keys (e.g., 'job_submission') not IDs
+- Form ID lookup happens via `FrmForm::getOne('form_key')`
+- Field IDs are stored in form configuration, not hardcoded
+
+### Modifying Email Templates
+
+Email templates are inline in `class-notifications.php`:
+- Admin emails use `wp_mail()` with HTML content
+- Mentor notification emails use `wp_mail()` with plain text
+- All emails include job title, provider name, and relevant links
+- Date formatting: Use `get_field()` for ACF dates, format with German locale
+
+### Adding New Notifications
+
+1. Identify triggering event (form submission, status change, custom action)
+2. Add notification method to `class-notifications.php`
+3. Hook into appropriate action in `setup_hooks()`
+4. For batch processing, use `DDHH_JM_Scheduler::schedule_mentor_notification_batch()`
+
+## Common Tasks
+
+### Debugging Action Scheduler
+
+```bash
+# View scheduled actions in WP CLI
+wp action-scheduler list --status=pending
+wp action-scheduler list --status=failed
+
+# Run pending actions manually
+wp action-scheduler run --batch-size=10
+
+# Clean up old actions
+wp action-scheduler clean --days=90
+```
+
+### Checking Provider Permissions
+
+Providers should NOT be able to:
+- Access WP-Admin (except profile.php)
+- Edit other providers' jobs
+- Publish jobs directly (must be pending)
+- View unpublished jobs by other providers
+
+### Verifying Job Moderation Flow
+
+1. Log in as provider → Submit job → Should create `pending` post
+2. Admin receives email with job details and moderation links
+3. Admin publishes job → Opted-in mentors receive notification (async batches)
+4. Provider sees published job in dashboard
+5. Mentors can view and apply to job
+
+### Date Field Handling
+
+Job deadlines use ACF date picker:
+- Format conversion in Formidable forms: Slashes auto-converted to dots for display
+- Before submission: Dots converted back to ISO format (YYYY-MM-DD)
+- Display: Use `get_field('job_deadline')` returns 'Ymd', format with `date_i18n()`
+- Validation: Date fields are optional (empty string is valid)
+
+### Logo Auto-Cropping
+
+Featured images (logos) auto-crop to 200×200px on upload:
+- Handled by `class-post-types.php` registering 'job-logo' image size
+- Uses WordPress `add_image_size()` with hard crop enabled
+- Images uploaded via Formidable forms trigger standard WP media processing
+
+## Project State
+
+**Currently**: Phase 6 (Email Notifications) is mostly complete. Phase 7 (Testing & Polish) is next.
+
+**What's working**:
+- Provider registration and authentication
+- Job submission, editing, deactivation workflows
+- Admin moderation and notifications
+- Mentor job browsing and applications
+- Opt-in preferences for mentor notifications
+- Action Scheduler integration for async processing
+
+**What's pending**:
+- Phase 6.3: Async batch email processing on job publish (implementation in progress)
+- Phase 7: End-to-end testing and production deployment prep
+
+**Documentation**: See `.planning/` for detailed project documentation:
+- `PROJECT.md` - Requirements and context
+- `ROADMAP.md` - Phase breakdown and progress
+- `STATE.md` - Current work and blockers
+- `phases/` - Detailed plans and summaries for each phase
+
+## Code Standards
+
+- **WordPress Coding Standards**: Follow WordPress PHP coding standards
+- **Text Domain**: Use `ddhh-job-manager` for all translatable strings
+- **German Language**: All user-facing text in German
+- **Security**: Validate ownership, escape output, verify nonces in forms
+- **Hook Naming**: Use `ddhh_jm_` prefix for custom actions/filters
+- **Class Naming**: Use `DDHH_JM_` prefix, one class per file
+- **Static Methods**: Use static methods for classes that don't maintain state
+- **Direct Exit**: Always include `defined( 'ABSPATH' ) || exit;` at top of PHP files
+
+## Critical Files to Review Before Major Changes
+
+- `ddhh-job-manager.php` - Plugin initialization order matters (Action Scheduler first)
+- `class-ddhh-job-manager.php` - Hook registration sequence
+- `class-formidable.php` - Form IDs and field mappings
+- `class-notifications.php` - Email templates and triggering logic
+- `class-access-control.php` - Security boundaries for providers
+- `class-post-types.php` - Capability mapping for `job_offer` posts