# TASK-002 Changelog: Legacy Project Migration

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## [2025-07-12] - Backup System Implementation

### Summary
Analyzed the v1.1.0 template-project and discovered that projects are already at version "4" (the current supported version). Created the project backup utility for safe migrations.

### Key Discovery
**Legacy projects from Noodl v1.1.0 are already at project format version "4"**, which means:
- No version upgrade is needed for the basic project structure
- The existing `ProjectPatches/` system handles node-level migrations
- The `Upgraders` in `projectmodel.ts` already handle format versions 0→1→2→3→4

### Files Created
- `packages/noodl-editor/src/editor/src/utils/projectBackup.ts` - Backup utility with:
  - `createProjectBackup()` - Creates timestamped backup before migration
  - `listProjectBackups()` - Lists all backups for a project
  - `restoreProjectBackup()` - Restores from a backup
  - `getLatestBackup()` - Gets most recent backup
  - `validateBackup()` - Validates backup JSON integrity
  - Automatic cleanup of old backups (default: keeps 5)

### Project Format Analysis
```
project.json structure:
├── name: string            # Project name
├── version: "4"            # Already at current version!
├── components: []          # Array of component definitions
├── settings: {}            # Project settings
├── rootNodeId: string      # Root node reference
├── metadata: {}            # Styles, colors, cloud services
└── variants: []            # UI component variants
```

### Next Steps
- Integrate backup into project loading flow
- Add backup trigger before any project upgrades
- Optionally create CLI tool for batch validation

---

## [2025-01-XX] - Task Created

### Summary
Task documentation created for legacy project migration and backward compatibility system.

### Files Created
- `dev-docs/tasks/phase-1/TASK-002-legacy-project-migration/README.md` - Full task specification
- `dev-docs/tasks/phase-1/TASK-002-legacy-project-migration/CHECKLIST.md` - Implementation checklist
- `dev-docs/tasks/phase-1/TASK-002-legacy-project-migration/CHANGELOG.md` - This file
- `dev-docs/tasks/phase-1/TASK-002-legacy-project-migration/NOTES.md` - Working notes

### Notes
- This task depends on TASK-001 (Dependency Updates) being complete or in progress
- Critical for ensuring existing Noodl users can migrate their production projects
- Scope may be reduced since projects are already at version "4"

---

## Template for Future Entries

```markdown
## [YYYY-MM-DD] - [Phase/Step Name]

### Summary
[Brief description of what was accomplished]

### Files Created
- `path/to/file.ts` - [Purpose]

### Files Modified
- `path/to/file.ts` - [What changed and why]

### Files Deleted
- `path/to/file.ts` - [Why removed]

### Breaking Changes
- [Any breaking changes and migration path]

### Testing Notes
- [What was tested]
- [Any edge cases discovered]

### Known Issues
- [Any remaining issues or follow-up needed]

### Next Steps
- [What needs to be done next]
```

---

## Progress Summary

| Phase | Status | Date Started | Date Completed |
|-------|--------|--------------|----------------|
| Phase 1: Research & Discovery | Not Started | - | - |
| Phase 2: Version Detection | Not Started | - | - |
| Phase 3: Migration Engine | Not Started | - | - |
| Phase 4: Individual Migrations | Not Started | - | - |
| Phase 5: Backup System | Not Started | - | - |
| Phase 6: CLI Tool | Not Started | - | - |
| Phase 7: Editor Integration | Not Started | - | - |
| Phase 8: Validation & Testing | Not Started | - | - |
| Phase 9: Documentation | Not Started | - | - |
| Phase 10: Completion | Not Started | - | - |
