# Release v1.9.11 Preparation Summary

**Date:** 2025-12-18  
**Prepared By:** Alteriom AI Agent  
**Release Type:** Patch Release (Critical Stability Fixes)

---

## ✅ Version Updates Completed

All 7 required files have been updated to version **1.9.11**:

| File | Status | Version/Content |
|------|--------|-----------------|
| `library.properties` | ✅ Updated | `version=1.9.11` |
| `library.json` | ✅ Updated | `"version": "1.9.11"` |
| `package.json` | ✅ Updated | `"version": "1.9.11"` |
| `src/painlessMesh.h` | ✅ Updated | `@version 1.9.11` + `@date 2025-12-18` |
| `src/AlteriomPainlessMesh.h` | ✅ Updated | `VERSION_PATCH 11` |
| `README.md` | ✅ Updated | Version banner: "Version 1.9.11" |
| `CHANGELOG.md` | ✅ Updated | `## [1.9.11] - 2025-12-18` |

---

## 📋 Release Contents

This release includes **three critical stability fixes** that address hard resets and heap corruption issues in ESP32/ESP8266 devices:

### 1. Hard Reset on Bridge Promotion - Unsafe addTask After stop/reinit

**Impact:** ⚠️ CRITICAL - Prevents device crashes during bridge promotion

- **Problem:** ESP32/ESP8266 hard resets (Guru Meditation Error) when becoming bridge
- **Root Cause:** Unsafe `addTask()` calls after `stop()/initAsBridge()` cycle
- **Solution:** Removed redundant task scheduling; rely on safe `initBridgeStatusBroadcast()`
- **Testing:** All 1000+ test assertions pass
- **Documentation:** `ISSUE_HARD_RESET_BRIDGE_PROMOTION_FIX.md`

### 2. Bridge Failover & sendToInternet Retry Connectivity

**Impact:** ⚠️ CRITICAL - Fixes heap corruption during connection instability

- **Problem:** Heap corruption and timeouts during bridge failover with `sendToInternet()`
- **Root Cause:** `retryInternetRequest()` didn't check mesh connectivity
- **Solution:** Added `hasActiveMeshConnections()` check before retry attempts
- **Testing:** 31 new assertions in `catch_sendtointernet_retry_no_mesh.cpp`
- **Documentation:** `BRIDGE_FAILOVER_RETRY_FIX.md`

### 3. Hard Reset During sendToInternet - Serialized AsyncClient Deletion

**Impact:** ⚠️ CRITICAL - Prevents concurrent cleanup crashes

- **Problem:** Heap corruption when multiple AsyncClient deletions execute concurrently
- **Root Cause:** AsyncTCP library can't handle concurrent cleanup operations
- **Solution:** Serialized deletion with 250ms spacing between operations
- **Performance:** Single deletion: 1000ms (unchanged), Multiple: 250ms spacing
- **Testing:** 47 assertions in tcp_retry tests
- **Documentation:** `ISSUE_HARD_RESET_SENDTOINTERNET_SERIALIZED_DELETION_FIX.md`

---

## 🔍 Validation Checklist

- [x] **Version Consistency:** All 7 files have matching version 1.9.11
- [x] **Semantic Versioning:** Format is valid (X.Y.Z)
- [x] **CHANGELOG Entry:** Version 1.9.11 dated 2025-12-18
- [x] **CHANGELOG Content:** Contains detailed Fixed sections
- [x] **README Updated:** Version banner reflects 1.9.11
- [x] **Header Files:** Date and version comments updated
- [x] **New [Unreleased] Section:** Created with TBD placeholders

---

## 🚀 Next Steps

### To Complete the Release:

1. **Review Changes:** Verify all changes are correct
2. **Merge to Main:** Merge this PR to the `main` branch
3. **Automatic Workflow:** GitHub Actions will automatically:
   - ✅ Run full test suite
   - ✅ Validate version consistency
   - ✅ Create git tag `v1.9.11`
   - ✅ Create GitHub Release with changelog
   - ✅ Publish to NPM (public registry)
   - ✅ Publish to GitHub Packages
   - ✅ Publish to PlatformIO Registry
   - ✅ Update GitHub Wiki

### Distribution Channels (All Automatic):

- **GitHub Releases:** https://github.com/Alteriom/painlessMesh/releases
- **NPM:** https://www.npmjs.com/package/@alteriom/painlessmesh
- **PlatformIO:** https://registry.platformio.org/libraries/alteriom/AlteriomPainlessMesh
- **Arduino Library Manager:** Auto-indexed after GitHub release

---

## 📊 Impact Assessment

### Severity: CRITICAL

All three fixes address production-blocking issues that cause device crashes in real-world deployments:

- **Before v1.9.11:** Devices crash during bridge promotion and failover scenarios
- **After v1.9.11:** Stable operation in high-availability bridge configurations

### Recommended For:

- ✅ All production deployments using bridge failover
- ✅ Systems using `sendToInternet()` functionality
- ✅ High-availability mesh networks
- ✅ ESP32/ESP8266 devices in critical applications

### Migration:

- **Breaking Changes:** None
- **API Changes:** None
- **Upgrade Effort:** Drop-in replacement - just update version

---

## 🧪 Testing Status

### Test Coverage:
- **Total Assertions:** 1000+ (all passing)
- **New Tests Added:** 78 assertions across 2 new test files
- **Test Files:**
  - `catch_sendtointernet_retry_no_mesh.cpp` (31 assertions)
  - tcp_retry deletion spacing tests (47 assertions)

### Build Status:
- **Platforms:** ESP32, ESP8266, Linux (desktop testing)
- **CI Pipeline:** Ready to run on merge
- **CMake Build:** Configured and validated

---

## 📝 Release Commit Format

When merging to main, use this commit format to trigger the release workflow:

```bash
release: v1.9.11 - Critical stability fixes for bridge promotion and AsyncClient cleanup
```

**Alternative formats that work:**
- `release: v1.9.11 - Description`
- Any commit that modifies version files (auto-detected)

---

## 📖 Documentation

### New Documentation Files:
1. `ISSUE_HARD_RESET_BRIDGE_PROMOTION_FIX.md`
2. `BRIDGE_FAILOVER_RETRY_FIX.md`
3. `ISSUE_HARD_RESET_SENDTOINTERNET_SERIALIZED_DELETION_FIX.md`

### Updated Files:
- `CHANGELOG.md` - Complete v1.9.11 entry
- `README.md` - Version banner
- `src/painlessMesh.h` - Header version comment
- `src/AlteriomPainlessMesh.h` - Version constants

---

## ✨ Key Features of This Release

1. **Production-Ready:** Fixes critical crashes in real-world scenarios
2. **Well-Tested:** Comprehensive test coverage with 1000+ assertions
3. **Well-Documented:** Detailed root cause analysis for each fix
4. **Backward Compatible:** No breaking changes or API modifications
5. **Performance Optimized:** Minimal overhead from serialization fixes

---

## 🎯 Success Criteria

Release is considered successful when:

- [x] All version files are consistent (1.9.11)
- [x] CHANGELOG is complete with dated entry
- [x] All tests pass locally
- [ ] CI pipeline passes on merge
- [ ] GitHub Release is created automatically
- [ ] NPM package is published
- [ ] PlatformIO Registry is updated
- [ ] GitHub Wiki is synchronized

---

**Prepared by:** Alteriom AI Agent  
**Review Status:** Ready for merge to main  
**Release Automation:** Fully configured and ready
