Developed a targeted feature for the GitGuardian/ggshield repository that introduced the NOT_INTRODUCED ignore rule, enabling secret scanning tools to skip secrets not newly introduced in a commit. This enhancement focused on refining scan precision by extending ignore logic to handle secrets found in deletions and context diffs, thereby reducing false positives and streamlining incident triage for security teams. The work involved updating the changelog to document the new behavior and ensuring traceability through commit linkage. Leveraged Python and Markdown alongside skills in code analysis, Git integration, and secret scanning to deliver an end-to-end solution aligned with product goals.