## Milestone 3: Workstreams ✓ COMPLETE ### Workstream Data Model 28. ✓ **Implement workstream storage** (`internal/storage/workstreams.go`) - `LoadWorkstreams(path string) (*WorkstreamCollection, error)` - `SaveWorkstreams(path string, collection *WorkstreamCollection) error` 29. ✓ **Create workstream manager** (`internal/core/workstream_manager.go`) - `CreateWorkstream(name string, base string) error` - `GetCurrentWorkstream() (*Workstream, error)` - `SwitchWorkstream(name string) error` - `ListWorkstreams() ([]*Workstream, error)` - `AddCommitToWorkstream(sha, message string) error` - `GetCurrentWorkstreamName() (string, error)` ### Workstream Commands 30. ✓ **Implement onx new** (`internal/commands/new.go`) - Validates workstream name - Creates workstream entry - Sets as current workstream - Updates workspace to base commit - Logs to oplog with transaction wrapper - Provides helpful next-step guidance 31. ✓ **Implement onx list** (`internal/commands/list.go`) - Reads workstreams.json via storage layer - Formats output with current indicator (*) - Shows commit count per workstream - Color-coded output for status (active=green, merged/abandoned/archived=gray) - `--all` flag to show non-active workstreams - Alias: `ls` 32. ✓ **Implement onx switch** (`internal/commands/switch.go`) - Validates target workstream exists - Checkouts latest commit in target workstream - Updates current_workstream pointer - Logs to oplog with transaction wrapper - Shows helpful info about target workstream 33. ✓ **Add workstream validation** - Validates workstream names (alphanumeric, hyphens, underscores, slashes only) - Prevents duplicate workstream names - Prevents reserved names (HEAD, main, master, etc.) - Integrated in `ValidateWorkstreamName()` function ### Integration & Refactoring - ✓ Refactored `onx save` to use WorkstreamManager - ✓ All commands properly wired in `cmd/onx/main.go` - ✓ All tests passing - ✓ Build successful