# Sprint 4.5: Project Schema Refactoring

**Status**: ✅ Complete
**Duration**: October 28, 2025
**Epic/Issues**: cf-005 (Project Schema Refactoring)

## Goal
Remove restrictive project_type enum, support flexible source types, enable both deployment modes.

## User Story
As a developer, I want to create projects from multiple sources (git, local, upload, empty) in both self-hosted and hosted SaaS modes.

## Implementation Tasks

### Core Features (P0)
- [x] **Phase 1**: Database Schema Migration - Flexible source types - 78f6a0b
- [x] **Phase 2**: API Models Refactoring - SourceType enum and validation - c2e8a3f
- [x] **Phase 3**: Workspace Management Module - Isolated project workspaces - 80384f1
- [x] **Phase 4**: API Endpoint Updates - Integration with WorkspaceManager - 5a208c8
- [x] **Phase 5**: Deployment Mode Validation - Security for hosted mode - 7e7727d
- [x] **Phase 6**: Integration Testing - End-to-end flow verification - 1131fc5

## Definition of Done
- [x] Database schema migrated with new fields
- [x] API models support flexible source types
- [x] Workspace manager creates isolated project directories
- [x] API endpoints integrated with workspace management
- [x] Deployment mode security validation active
- [x] 21 new tests passing (100% coverage)
- [x] Integration tests verify end-to-end flow

## Key Commits
- `78f6a0b` - feat(cf-005): Database schema migration with flexible source types
- `c2e8a3f` - feat(cf-005): API models refactoring with SourceType enum
- `80384f1` - feat(cf-005): Workspace management module implementation
- `5a208c8` - feat(cf-005): API endpoint updates with rollback mechanism
- `7e7727d` - feat(cf-005): Deployment mode validation and security
- `1131fc5` - feat(cf-005): Integration testing for end-to-end flow

## Schema Changes
### Removed Fields
- `project_type` enum (restrictive)
- `root_path` (replaced with workspace_path)

### Added Fields
- `description` (NOT NULL) - Project description
- `source_type` (enum) - git_remote, local_path, upload, empty
- `source_location` - Git URL or filesystem path
- `source_branch` - Git branch (default: main)
- `workspace_path` - Isolated workspace directory
- `git_initialized` (boolean) - Git repo status
- `current_commit` - Current HEAD commit hash

## Source Types Supported
- **git_remote**: Clone from git URL (both deployment modes)
- **local_path**: Copy from filesystem (self-hosted only)
- **upload**: Extract from archive (future implementation)
- **empty**: Initialize empty git repo (both deployment modes)

## Deployment Modes
- **self_hosted** (default): All source types allowed, filesystem access
- **hosted**: Git remote/empty/upload only, blocks local_path (HTTP 403)

## Metrics
- **Tests**: 21 new tests
- **Coverage**: 100% for new code
- **Pass Rate**: 100%
- **LOC Added**: ~500 lines (workspace manager, API updates)

## Sprint Retrospective

### What Went Well
- Clean separation of workspace management concerns
- Security validation prevents filesystem access in hosted mode
- Rollback mechanism handles workspace creation failures gracefully
- Minimal disruption to existing codebase

### Challenges & Solutions
- **Challenge**: Database migration without data loss
  - **Solution**: Drop and recreate projects table (acceptable for early development)
- **Challenge**: Secure multi-tenancy in hosted mode
  - **Solution**: DeploymentMode enum with runtime validation

### Key Learnings
- Flexible schema design enables future SaaS deployment
- Workspace isolation critical for security
- Environment-based deployment mode detection works well
- Rollback mechanisms prevent partial state corruption

## References
- **Beads**: cf-005
- **Specs**: N/A (rapid refactoring sprint)
- **Docs**: docs/plans/2025-10-27-project-schema-implementation.md
- **Test Results**: claudedocs/project-schema-test-results.md
