Prompt

Finds why a test passes and fails intermittently and fixes the cause instead of adding retries. Use when a test fails only sometimes, locally or in CI.

Reviews failure paths for swallowed errors, lost context, unsafe retries, missing timeouts and internal details leaking to users, with ranked fixes. Use on code that calls I/O or external services.

Reviews a Dockerfile for security, image size, build cache use and runtime correctness, and returns ranked findings with a corrected file. Use before shipping an image, or when one is too big.

Wraps new behaviour behind a feature flag with a safe default, a kill switch, tests for both paths and a cleanup ticket. Use when shipping a risky change incrementally.

Plans and adds logs, metrics and traces using OpenTelemetry conventions, golden signals, useful log fields, cardinality limits and first dashboards. Use when a service is hard to debug in production.

Writes an onboarding guide for a repository covering setup, an architecture map, first tasks and known gotchas, with every command checked against the repo. Use for new hires or contributors.