// quick-ref: agent build checklist
>[ ] Task scope defined — one workflow, clear success metric
>[ ] Model selected — matched to task, not just biggest available
>[ ] System prompt written — role, format, constraints, edge cases
>[ ] Tools wired — each tool does one thing, descriptions are precise
>[ ] Data pipeline built — context is clean, relevant, and fast
>[ ] 20+ test cases passing — edge cases logged, failures tracked
>[ ] Deployed — auth, rate limiting, and error logging are live
>[ ] Monitoring active — token cost, latency, and outcome metrics
>[ ] Iteration loop running — changelog kept, prompt variants tested
>[ ] Scale plan ready — memory, parallelism, orchestration queued