Code remediation is the process of changing existing software to correct defects, meet updated requirements, or make it work in a new environment. During a legacy-system migration, this can include updating outdated interfaces, replacing unsupported functions, and adjusting code to preserve business rules on a new platform.
Remediation matters for security and reliability because changes can introduce vulnerabilities or break existing behavior. Teams use code reviews, static analysis, and regression testing to check that fixes are safe and that existing functions still work. When AI tools help suggest or apply changes, human review, controlled access, and auditable change logs help ensure the resulting code is correct and secure.