Add a --ws <name> CLI flag that routes all .planning/ paths to
.planning/workstreams/<name>/, enabling multi-workstream projects
without directory conflicts.
Changes:
- workstream-utils.ts: validateWorkstreamName() and relPlanningPath() helpers
- cli.ts: Parse --ws flag with input validation
- types.ts: Add workstream? to GSDOptions
- gsd-tools.ts: Inject --ws <name> into all gsd-tools.cjs invocations
- config.ts: Resolve workstream-aware config path with root fallback
- context-engine.ts: Constructor accepts workstream via positional param
- index.ts: GSD class propagates workstream to all subsystems
- ws-flag.test.ts: 22 tests covering all workstream functionality
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
868e3d488f