Repeatability
Medium
The pattern of adding circuit-breakers and Prometheus metrics to Express APIs is well-trodden, but each of the 8 pools (MySQL, PostgreSQL, MongoDB, Redis) has different driver APIs and config knobs. The agent must adapt to each driver's specifics, making this moderately repeatable rather than fully templated.
Ambiguity Tolerance
Medium
Success criteria are partially clear — expose metrics, add circuit-breaker, fix pool config — but thresholds (what counts as 'saturated'?), circuit-breaker trip conditions, and acceptable latency tradeoffs are undefined. The agent must make judgment calls or ask clarifying questions.
Data & Tool Availability
Low
The agent needs the actual source files, current pool configs, load patterns, and environment variables to do a real audit. Without file access, it can only produce generic templates. It also cannot run load tests to validate the changes work.
Error Cost
High
Misconfigured circuit-breaker thresholds or pool settings in a production API can cause cascading failures, dropped requests, or silent data loss. Changes to connection pool behavior are not trivially reversible if deployed without staging validation.
Human Judgment Required
Medium
Choosing circuit-breaker trip thresholds, fallback behavior, and pool sizing requires understanding the business criticality of each service and acceptable degradation modes — judgment calls a senior engineer should own. The implementation mechanics, however, are largely mechanical.