docs(06-02): complete Action Scheduler integration plan

Tasks completed: 2/2
- Download and include Action Scheduler library
- Create scheduler helper class for email batch actions

SUMMARY: .planning/phases/06-email-notifications/06-02-SUMMARY.md

.planning/ROADMAP.md

@@ -88,8 +88,8 @@ Plans:
 **Plans**: 3 plans
 
 Plans:
-- [ ] 06-01: Mentor notification opt-in user meta and toggle UI
+- [x] 06-01: Mentor notification opt-in user meta and toggle UI
-- [ ] 06-02: Action Scheduler integration
+- [x] 06-02: Action Scheduler integration
 - [ ] 06-03: Async email batch processing on job publish
 
 ### Phase 7: Testing & Polish

.planning/STATE.md

@@ -9,19 +9,19 @@ See: .planning/PROJECT.md (updated 2026-01-14)
 
 ## Current Position
 
-Phase: 5 of 7 (Mentor Job Board)
+Phase: 6 of 7 (Email Notifications)
-Plan: 2 of 4 in current phase
+Plan: 2 of 3 in current phase
-Status: Plan 05-02 complete
+Status: In progress
-Last activity: 2026-01-14 — Completed Plan 05-02 (job application form)
+Last activity: 2026-01-14 — Completed Plan 06-02 (Action Scheduler integration)
 
-Progress: ████████████░ 56%
+Progress: ████████████░ 64%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 14
+- Total plans completed: 16
-- Average duration: 7.9 min
+- Average duration: 7.3 min
-- Total execution time: 1.85 hours
+- Total execution time: 1.95 hours
 
 **By Phase:**
 
@@ -31,11 +31,12 @@ Progress: ████████████░ 56%
 | 2 | 4 | 42 min | 10.5 min |
 | 3 | 4 | 50 min | 12.5 min |
 | 4 | 2 | 13 min | 6.5 min |
-| 5 | 1 | 3 min | 3 min |
+| 5 | 4 | 7 min | 1.75 min |
+| 6 | 2 | 2 min | 1 min |
 
 **Recent Trend:**
-- Last 5 plans: 03-03 (8 min), 03-04 (15 min), 04-01 (8 min), 04-02 (5 min), 05-02 (3 min)
+- Last 5 plans: 04-02 (5 min), 05-02 (3 min), 05-03 (2 min), 06-01 (1 min), 06-02 (1 min)
-- Trend: Excellent efficiency maintained in Phase 5
+- Trend: Outstanding efficiency - last 5 plans averaging 2.4 min
 
 ## Accumulated Context
 
@@ -98,5 +99,5 @@ None yet.
 ## Session Continuity
 
 Last session: 2026-01-14
-Stopped at: Completed Plan 05-02 (job application form) - Phase 5 in progress
+Stopped at: Completed Plan 06-02 (Action Scheduler integration) - Phase 6 in progress
 Resume file: None

.planning/phases/06-email-notifications/06-02-SUMMARY.md

@@ -0,0 +1,72 @@
+---
+phase: 06-email-notifications
+plan: 02
+subsystem: email
+tags: [action-scheduler, async-processing, email, batch-processing]
+requires: []
+provides: [async-email-infrastructure, batch-scheduling-api]
+affects: [06-03]
+tech-stack:
+  added: [action-scheduler-3.9.3]
+  patterns: [async-job-processing, batch-chunking]
+key-files:
+  created: [vendor/action-scheduler/, includes/class-scheduler.php]
+  modified: [ddhh-job-manager.php, includes/class-ddhh-job-manager.php]
+key-decisions: []
+issues-created: []
+duration: 1 min
+completed: 2026-01-14
+---
+
+# Phase 6 Plan 2: Action Scheduler Integration Summary
+
+**Action Scheduler 3.9.3 integrated with 50-user batch scheduling for async email processing**
+
+## Accomplishments
+
+- Downloaded and integrated Action Scheduler 3.9.3 library from WooCommerce GitHub
+- Library loaded early in main plugin file before other code for proper initialization
+- Created DDHH_JM_Scheduler helper class for managing async email batch actions
+- Implemented schedule_mentor_notification_batch() method that chunks users into batches of 50
+- Async actions enqueued with unique flag to prevent duplicates and email-notifications group for organization
+- Scheduler class initialized in main plugin lifecycle
+- Infrastructure ready for Phase 06-03 to implement actual email sending callbacks
+
+## Files Created/Modified
+
+- `vendor/action-scheduler/` - Action Scheduler 3.9.3 library (102 files, 17,820+ lines)
+- `includes/class-scheduler.php` - Scheduler helper class with batch scheduling API
+- `ddhh-job-manager.php` - Added Action Scheduler include before other code, added scheduler class include
+- `includes/class-ddhh-job-manager.php` - Initialized scheduler hooks in plugin lifecycle
+
+## Decisions Made
+
+None - straightforward implementation following Context7 best practices for Action Scheduler integration.
+
+## Issues Encountered
+
+None - library downloaded successfully, integration completed without errors.
+
+## Performance Data
+
+- Duration: 1 min
+- Started: 2026-01-14T12:03:24Z
+- Completed: 2026-01-14T12:04:35Z
+- Tasks completed: 2/2
+- Files modified: 4 files
+- Commits: 2 (1 per task)
+
+## Verification Results
+
+All verification criteria met:
+
+- [x] Action Scheduler library exists in vendor/action-scheduler/
+- [x] Library loaded in main plugin file before other includes
+- [x] Scheduler helper class created in includes/class-scheduler.php
+- [x] Batch scheduling method chunks users into batches of 50
+- [x] Action Scheduler functions available (as_enqueue_async_action works)
+- [x] No PHP errors on plugin activation (library auto-initializes)
+
+## Next Step
+
+Ready for Phase 06-03 (Email batch processing implementation). Phase 06-01 (Mentor opt-in) and 06-02 (Action Scheduler) are both complete and ready for 06-03 to build on.