The right design is a staged, read-first Dynamic Workflow: Fable 5.1 owns scope, architecture, orchestration, and the final verdict; Haiku inventories and normalizes evidence; Sonnet handles ordinary code tracing; Opus performs the difficult and security-sensitive investigations. Every material finding is independently verified before reaching the report.
Dynamic Workflows are a strong fit because the orchestration is encoded as JavaScript, intermediate results live outside the lead model’s context, and the runtime can enforce fan-out and verification rather than merely hoping the lead agent remembers every step. The runtime supports up to 16 concurrent agents and 1,000 total agents, though your first run should be much smaller. Anthropic’s workflow documentation
Evaluate the API implementation rooted at one designated source directory and answer: