NestJS is a TypeScript natural fit for fintech. GreatCTO auto-detects both — adds the fintech archetype overlay, wires fintech-specific gates, and runs 34 specialist agents around your existing NestJS workflow.
GreatCTO reads your package.json and detects nestjs + fintech archetype from signals: imports, file structure, env vars, README hints.
Attaches the fintech archetype overlay: PCI-DSS scope detection, SOX ITGC gates, KYC / AML hooks, idempotency review. Override if your specifics differ; the defaults are sensible for NestJS-style projects.
qa-engineer runs tsc --strict / eslint / vitest --coverage; security-officer checks for prototype pollution + XSS sinks; performance-engineer reviews bundle size + cold-start times.
Bugs you've hit before in other NestJS 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-nestjs-app && npx great-cto init ✓ scanning manifests… found package.json ✓ stack: nestjs (TypeScript) ✓ archetype: fintech ✓ overlay: applied ✓ 34 agents ready $ /start "add Stripe subscription endpoint" ▸ architect drafting ARCH-fintech.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.
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.