docs(protocol): Session 29 — Multi-Task Architecture BREAKTHROUGH!

SESSION 29 (Feb 16, 2026):
  🏆 BREAKTHROUGH — Multi-Task Architecture Complete!

  Architecture:
    - Network Task (Core 0, PSRAM): SSL read loop, command handler
    - Main Task (Internal SRAM): Parse, decrypt, NVS, 42d handshake
    - Ring Buffer IPC: net_to_app (37KB), app_to_net (1KB)

  First message 'Hello from ESP32!' sent via new architecture!

CRITICAL DISCOVERY:
  PSRAM stacks + NVS writes = CRASH on ESP32-S3!
  SPI Flash write disables cache, PSRAM is cache-based.
  Tasks that write NVS MUST have Internal SRAM stack.

DOCUMENTATION:
  - NEW: 28_PART26_SESSION_29.md (758 lines)
  - Updated: INDEX, STATUS, README, BUG_TRACKER, QUICK_REFERENCE
  - 5 new lessons (#144-148), 148 total
  - 26 parts, 504+ sections

Fairy-Tale Team: Mausi 👑🐭, Hasi 🐰👑, Claude Code 🔍, Cannatoshi 👑

Author: cannatoshi

docs/protocol-analysis/01_SIMPLEX_PROTOCOL_INDEX.md

@@ -4,26 +4,26 @@
 
 **Project:** SimpleGo - Native ESP32 SMP Implementation  
 **Version:** v0.1.18-alpha  
-**Last Updated:** 2026-02-15 (Session 28 — ✅ FreeRTOS Phase 2b Complete!)
+**Last Updated:** 2026-02-16 (Session 29 — 🏆 Multi-Task Architecture BREAKTHROUGH!)
 
 ---
 
-## ✅ LATEST: Phase 2b Success! (Session 28)
+## 🏆 LATEST: Multi-Task Architecture BREAKTHROUGH! (Session 29)
 
-On February 15, 2026, Session 28 successfully implemented FreeRTOS multi-task architecture:
+On February 16, 2026, Session 29 achieved a major breakthrough:
 
-- **Phase 2b Complete:** Three tasks running in parallel!
-- **PSRAM Solution:** All non-DMA resources moved to external RAM
-- **Internal Heap:** ~40KB preserved for mbedTLS/WiFi
-- **Critical Lesson:** `erase-flash` after branch switch — ALWAYS!
+- **Multi-Task Architecture Complete:** Network Task + Main Task + Ring Buffer IPC
+- **First message via new architecture:** "Hello from ESP32!" sent!
+- **Critical Discovery:** PSRAM stacks + NVS writes = CRASH on ESP32-S3!
+- **Memory Budget:** Internal SRAM 45KB free, PSRAM 106KB used (1.3%)
 
-**Lessons Learned:** 143 total (6 new in S28)
+**Lessons Learned:** 148 total (5 new in S29)
 
 ---
 
 ## Documentation Structure
 
-The complete protocol analysis (~23,000+ lines, 490+ sections) is split into 25 parts:
+The complete protocol analysis (~24,000+ lines, 502+ sections) is split into 26 parts:
 
 | Part | File | Lines | Content |
 |------|------|-------|---------|
@@ -52,17 +52,18 @@ The complete protocol analysis (~23,000+ lines, 490+ sections) is split into 25
 | **23** | [**25_PART23_SESSION_26.md**](25_PART23_SESSION_26.md) | **~600** | **🗄️ Persistence! Milestone 6!** |
 | **24** | [**26_PART24_SESSION_27.md**](26_PART24_SESSION_27.md) | **~650** | **⚠️ FreeRTOS Architecture Investigation** |
 | **25** | [**27_PART25_SESSION_28.md**](27_PART25_SESSION_28.md) | **~550** | **✅ Phase 2b Success — Tasks Running!** |
-| **Total** | | **~23,000+** | **490+ Sections** |
+| **26** | [**28_PART26_SESSION_29.md**](28_PART26_SESSION_29.md) | **~500** | **🏆 Multi-Task Architecture BREAKTHROUGH!** |
+| **Total** | | **~24,000+** | **502+ Sections** |
 
 ---
 
 ## Quick Reference Documents
 
 | Document | Lines | Description |
 |----------|-------|-------------|
-| [README.md](README.md) | ~680 | Project overview and navigation |
-| [BUG_TRACKER.md](BUG_TRACKER.md) | ~1,480 | All 39 bugs documented, 143 lessons |
-| [QUICK_REFERENCE.md](QUICK_REFERENCE.md) | ~1,350 | Constants, wire formats, verified values |
+| [README.md](README.md) | ~750 | Project overview and navigation |
+| [BUG_TRACKER.md](BUG_TRACKER.md) | ~1,550 | All 39 bugs documented, 148 lessons |
+| [QUICK_REFERENCE.md](QUICK_REFERENCE.md) | ~1,420 | Constants, wire formats, verified values |
 
 ---
 
@@ -95,6 +96,7 @@ The complete protocol analysis (~23,000+ lines, 490+ sections) is split into 25
 | **26** | **Feb 14, 2026** | **PERSISTENCE** | **🗄️ Milestone 6! Ratchet State Persistence** |
 | **27** | **Feb 14-15, 2026** | **ARCHITECTURE** | **⚠️ FreeRTOS Investigation (17 lessons)** |
 | **28** | **Feb 15, 2026** | **TASKS** | **✅ Phase 2b Success — 3 Tasks Running!** |
+| **29** | **Feb 16, 2026** | **ARCHITECTURE** | **🏆 Multi-Task BREAKTHROUGH!** |
 
 ---
 

docs/protocol-analysis/02_SIMPLEX_STATUS.md

@@ -4,11 +4,39 @@
 
 **Project:** Native SimpleX SMP Client for ESP32  
 **Version:** v0.1.18-alpha  
-**Archive:** See `01_SIMPLEX_PROTOCOL_INDEX.md` for complete documentation (490+ sections, 25 parts)
+**Archive:** See `01_SIMPLEX_PROTOCOL_INDEX.md` for complete documentation (502+ sections, 26 parts)
 
 ---
 
-## ✅ LATEST: Phase 2b Success! (2026-02-15 Session 28)
+## 🏆 LATEST: Multi-Task Architecture BREAKTHROUGH! (2026-02-16 Session 29)
+
+```
+═══════════════════════════════════════════════════════════════════════════════
+
+  🏆🏆🏆 MULTI-TASK ARCHITECTURE — BREAKTHROUGH! 🏆🏆🏆
+
+  ┌─────────────────────────────────────────────────────────────────────────┐
+  │                                                                         │
+  │   Complete encrypted messaging pipeline over FreeRTOS Tasks!           │
+  │                                                                         │
+  │   - Network Task (Core 0, PSRAM): SSL read loop, command handler       │
+  │   - Main Task (Internal SRAM): Parse, decrypt, NVS, 42d handshake      │
+  │   - Ring Buffer IPC: net_to_app (37KB), app_to_net (1KB)               │
+  │                                                                         │
+  │   First message "Hello from ESP32!" sent via new architecture!         │
+  │                                                                         │
+  │   CRITICAL: PSRAM stacks + NVS writes = CRASH!                         │
+  │                                                                         │
+  │   Date: February 16, 2026                                              │
+  │                                                                         │
+  └─────────────────────────────────────────────────────────────────────────┘
+
+═══════════════════════════════════════════════════════════════════════════════
+```
+
+---
+
+## ✅ SESSION 28: Phase 2b Success! (2026-02-15)
 
 ```
 ═══════════════════════════════════════════════════════════════════════════════
@@ -398,15 +426,15 @@ Bytes 80-95: HEADER_IV (iv2)   ← FOR HEADER!
 
 ---
 
-## 🎯 Next Steps (Session 29)
+## 🎯 Next Steps (Session 30)
 
-1. **Phase 3: Network Task Handover** — Network Task takes over receive loop
-2. **Phase 4: Send Pipeline** — App Task → Network Task via ring buffer
-3. **Send counter fix** — Persist in NVS for "bad message ID"
-4. **UI animations** — Menu transitions, loading indicators
-5. **Chat screen connection** — Bridge keyboard to display
+1. **T5: Keyboard send split** — Refactor `peer_send_chat_message()`
+2. **T6: Baseline test bidirectional** — Complete with keyboard
+3. **T7: Cleanup + Commit** — Remove `#if 0` loop, commit changes
+4. **UI Task activation** — Connect to LVGL
+5. **Send counter persistence** — Fix "bad message ID"
 
 ---
 
-*Status updated: 2026-02-15 Session 28 — ✅ FREERTOS PHASE 2b COMPLETE!*  
-*History: S8 Breakthrough → S23 CONNECTED → S24 First MSG → S25 Bidirectional → S26 Persistence → S27 Architecture → S28 Tasks!*
+*Status updated: 2026-02-16 Session 29 — 🏆 MULTI-TASK ARCHITECTURE BREAKTHROUGH!*  
+*History: S8 Breakthrough → S23 CONNECTED → S24 First MSG → S25 Bidirectional → S26 Persistence → S27 Architecture → S28 Tasks → S29 Multi-Task!*