FastAPI is a Python workable choice for enterprise saas. GreatCTO auto-detects both — adds the enterprise-saas archetype overlay, wires enterprise-saas-specific gates, and runs 34 specialist agents around your existing FastAPI workflow.
GreatCTO reads your pyproject.toml / requirements.txt and detects fastapi + enterprise-saas archetype from signals: imports, file structure, env vars, README hints.
Attaches the enterprise-saas archetype overlay: archetype-specific reviewer + compliance gates. Override if your specifics differ; the defaults are sensible for FastAPI-style projects.
qa-engineer runs mypy / ruff / pytest --cov; security-officer scans for SQL injection patterns common in ORMs (SQLAlchemy, Django ORM); performance-engineer profiles async patterns for I/O contention.
Bugs you've hit before in other FastAPI projects (connection-pool exhaustion, ORM N+1 queries, retry storms) — the agent's Step 0 includes the prior detection order. MTTR drops 94 % on second occurrence (methodology).
$ cd my-fastapi-app && npx great-cto init ✓ scanning manifests… found pyproject.toml ✓ stack: fastapi (Python) ✓ archetype: enterprise-saas ⚠ archetype + stack combo is unusual — review overlay manually ✓ 34 agents ready $ /start "add enterprise-saas feature" ▸ architect drafting ARCH-enterprise-saas.md… ▸ pm decomposing into beads tasks… ⚐ gate:plan — your approval needed
Approve → 3 senior-devs run in parallel worktrees → 5 reviewers fan out in parallel → gate:ship → deploy. One real run walked stage-by-stage: /proof.
FastAPI (Python) is not a typical fit for enterprise saas. The archetype overlay still attaches, but you may want to override defaults more aggressively. Check the enterprise-saas archetype page for the typical stack list and decide if your case is the right tool / right archetype.
No black-box "AI does it all" loop. GreatCTO is a deterministic state machine — 8 stages, 22 nodes, 2 human gates. Every node maps to a real agent on GitHub. Inspect the state machine →
$ npx great-cto init
Free, MIT, runs locally. Works in Claude Code, Cursor, OpenAI Codex CLI, Aider, and Continue.