# Dependency Update Plan for Breaking Changes

## ⚠️ Breaking Changes Requiring Testing

The following dependency updates have breaking changes and require careful testing before merging:

### 1. Express.js 5.1.0 (Major Update)
**Current**: 4.21.2  
**Target**: 5.1.0  
**Status**: ⚠️ **Requires Testing**

**Breaking Changes**:
- Middleware signature changes
- Error handling updates
- Request/Response API changes

**Testing Required**:
- [ ] All API endpoints work correctly
- [ ] Middleware functions are compatible
- [ ] Error handling works as expected
- [ ] SSE endpoints function properly

**Action Plan**:
1. Create test branch: `git checkout -b test-express-5`
2. Merge Dependabot branch
3. Run tests: `cd orchestrator && npm test`
4. Test API endpoints manually
5. Fix any breaking changes
6. Merge to main if all tests pass

---

### 2. Hardhat 3.0.11 (Major Update)
**Current**: 2.26.5  
**Target**: 3.0.11  
**Status**: ⚠️ **Requires Testing**

**Breaking Changes**:
- Configuration file format changes
- Test API changes
- Compilation changes

**Testing Required**:
- [ ] Contracts compile successfully
- [ ] Tests run and pass
- [ ] Deployment scripts work
- [ ] Test utilities are compatible

**Action Plan**:
1. Create test branch: `git checkout -b test-hardhat-3`
2. Merge Dependabot branch
3. Update `hardhat.config.ts` if needed
4. Run: `cd contracts && npm run compile && npm test`
5. Fix any breaking changes
6. Merge to main if all tests pass

---

### 3. Hardhat Toolbox 6.1.0 (Major Update)
**Current**: 4.0.0  
**Target**: 6.1.0  
**Status**: ⚠️ **Requires Testing**

**Testing Required**:
- [ ] Works with Hardhat 3.x
- [ ] All plugins function correctly
- [ ] Tests pass

---

### 4. Chai 6.2.0 (Major Update)
**Current**: 4.5.0  
**Target**: 6.2.0  
**Status**: ⚠️ **Requires Testing**

**Breaking Changes**:
- Assertion API changes
- Plugin system updates

**Testing Required**:
- [ ] All test assertions work
- [ ] Test utilities are compatible
- [ ] Update test files if needed

**Action Plan**:
1. Create test branch: `git checkout -b test-chai-6`
2. Merge Dependabot branch
3. Run: `cd contracts && npm test`
4. Update test assertions if needed
5. Merge to main if all tests pass

---

## ✅ Safe Updates (Already Merged)

The following updates have been merged as they are safe:

- ✅ GitHub Actions: checkout v5, setup-node v6, upload-artifact v5, action-gh-release v2
- ✅ Type definitions: @types/express 5.0.5, @types/node 24.10.0, @types/chai 5.2.3
- ✅ Orchestrator: uuid 13.0.0

---

## 📋 Next Steps

1. **Test Express.js 5.x Update**
   - Create test branch
   - Merge and test
   - Fix breaking changes
   - Merge to main

2. **Test Hardhat 3.x Update**
   - Create test branch
   - Merge and test
   - Update configuration
   - Merge to main

3. **Test Chai 6.x Update**
   - Create test branch
   - Merge and test
   - Update assertions
   - Merge to main

---

**Status**: Safe updates merged, breaking changes pending testing  
**Date**: 2025-01-15