test: pytest fixtures (master_workflow, canonical_inputs, fake_hf_cache)

docs: add MIT LICENSE

docs: README with Spaces front matter and local quickstart

fix(setup): replace `|| true` with explicit existence check for refresh_models.py

chore: idempotent setup.sh — venv, submodule, custom nodes, models

chore: pin runtime + dev dependencies and configure pytest/ruff

docs(claude): expand project guidelines with TDD discipline, commit format, common pitfalls

docs: implementation plan — 27 tasks across 8 phases

docs: design spec for v1 — Gradio + bundled ComfyUI library backend

Initial commit