New CLI for inspecting project artifacts:
gstack projects ls — list all projects with artifact counts and sizes
gstack projects show — detailed view of one project with manifest entries
gstack projects clean — find and remove E2E test garbage directories
Reads .manifest.jsonl when available for richer output.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Garry Tan