Container image hardening with coding agents

Container image hardening is most effective when coding agents are assigned narrowly defined, evidence-based tasks rather than broad security cleanup requests. The process should identify the affected image digest, Dockerfile, build command, architecture, vulnerable package, and introducing layer, then constrain changes to relevant actions such as updating a base image, removing unused software, separating build and runtime stages, or running as a non-root user. Teams should preserve rollback information, rebuild images without local cache reliance, scan the resulting image digest, and test production-like runtime behavior including entrypoints, permissions, networking, certificates, and native libraries. Pull requests should document findings, image digests, changed layers, commands, test results, and justifications while avoiding sensitive information, and unresolved risks should have documented controls, ownership, and expiration dates. Small, reproducible changes supported by separate scanning and runtime validation checks are presented as easier to review and safer to deploy.

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