diff --git a/docs/progress/00-STATUS.md b/docs/progress/00-STATUS.md
index 0055854..9eb48dc 100644
--- a/docs/progress/00-STATUS.md
+++ b/docs/progress/00-STATUS.md
@@ -2,17 +2,17 @@
 
 **Purpose:** Single source of truth for current project status, phase completion, blockers, and next actions.  
 **Owner:** Development Team  
-**Last Updated:** 2025-12-22 (P2.3 + P1.5b complete, P3 design created)  
+**Last Updated:** 2025-12-22 (P3 complete)  
 **Status:** active  
-**Baseline Tag:** `v1.0.11-p2.3-p1.5b-complete`
+**Baseline Tag:** `v1.0.11-p3-complete`
 
 ---
 
 ## Current Phase
 
-**P0 + P1.4 + P1.5 + P2.6 + P2.7 + P2.x Milestone** - Foundation, Documentation, Type Safety & Resilience Established
+**P3: Performance, Observability & Developer Experience** - Performance optimization, enhanced observability, developer experience improvements, and documentation polish
 
-**Status:** ✅ Complete — Tagged as baseline: `v1.0.11-p2-complete`
+**Status:** ✅ Complete — Tagged as baseline: `v1.0.11-p3-complete`
 
 **What This Baseline Includes:**
 - ✅ P0: Publish safety & CI hardening (packaging, exports, CI debuggability)
@@ -79,13 +79,28 @@ None currently.
   - Instrumented recovery paths (Android + iOS) with timing
   - Instrumented database operations (Android) with timing
   - Created performance characteristics documentation (docs/PERFORMANCE.md)
+- [x] P3.2: Enhanced observability
+  - Expanded event coverage (9 new event codes for recovery, database, state transitions, background tasks)
+  - Implemented structured metrics export (exportMetrics(), getMetricsSummary())
+  - Enhanced error context (logError() with structured error data)
+  - Added opt-in diagnostic mode (enableDiagnosticMode(), getDiagnosticInfo())
+- [x] P3.3: Developer experience improvements
+  - Enhanced error messages with actionable guidance (ERROR_GUIDANCE constant)
+  - Added debug helpers (getDebugState() method)
+  - Type tightening (ScheduleWithStatus.status field)
+  - Integration examples (Quick Start, Common Patterns)
+- [x] P3.4: Documentation polish
+  - Enhanced public API JSDoc (createSchedule, updateSchedule, deleteSchedule, enableSchedule)
+  - Created troubleshooting guide (docs/TROUBLESHOOTING.md)
+  - Created getting started guide (docs/GETTING_STARTED.md)
+  - Updated documentation index
 
 ---
 
 ## Next Actions (Max 5)
 
-1. **Review P3 Design** - `docs/progress/P3-DESIGN.md` created, awaiting approval
-2. **Begin P3.1** - Performance optimization & metrics (after P3 design approval)
+1. **Review P3 completion** - All P3 items complete, ready for baseline tag
+2. **Consider next phase** - P3 complete, foundation ready for new features
 
 ---
 
@@ -142,9 +157,10 @@ See [04-PARITY-MATRIX.md](./04-PARITY-MATRIX.md) for detailed parity tracking.
 
 **Git Hook:** Pre-push hook available at `githooks/pre-push` (setup: `git config core.hooksPath githooks`). Calls `./ci/run.sh`.
 
-**Baseline Tag:** `v1.0.11-p2.3-p1.5b-complete` — This tag represents P2.x completion + test harness cleanup (schema versioning + combined resilience tests + Android parity + test harness separation). Use as rollback anchor or reference point for future work.
+**Baseline Tag:** `v1.0.11-p3-complete` — This tag represents P3 completion (performance optimization, enhanced observability, developer experience improvements, and documentation polish). Use as rollback anchor or reference point for future work.
 
 **Previous Baselines:**
+- `v1.0.11-p2.3-p1.5b-complete` — P2.x completion + test harness cleanup
 - `v1.0.11-p2.3-complete` — P2.3 milestone (Android parity achieved)
 - `v1.0.11-p2-complete` — P2.x milestone (schema versioning + iOS combined tests)
 - `v1.0.11-p0-p1.4-p1.5-p2.6-p2.7-complete` — Foundation + type safety milestone
diff --git a/docs/progress/01-CHANGELOG-WORK.md b/docs/progress/01-CHANGELOG-WORK.md
index 2aa01e1..6e87d16 100644
--- a/docs/progress/01-CHANGELOG-WORK.md
+++ b/docs/progress/01-CHANGELOG-WORK.md
@@ -2,7 +2,7 @@
 
 **Purpose:** Development changelog tracking work-in-progress changes, refactors, and improvements (not the release CHANGELOG.md).  
 **Owner:** Development Team  
-**Last Updated:** 2025-12-22 (P2.3 complete)  
+**Last Updated:** 2025-12-22 (P3 complete)  
 **Status:** active
 
 For release notes, see [CHANGELOG.md](../../CHANGELOG.md).