Automating Android Source Code Diff Analysis with Claude Code Agent

The author previously analyzed every Android version upgrade by manually downloading source code and using Beyond Compare to inspect differences, learning new techniques from each release. With the emergence of code agents, they tested whether this entire workflow could be automated using Claude Code.

Setting Up the Automated Workflow

The author created an Android directory, launched Claude Code, and issued a two-step instruction:

Download Android 17 open-source code into an android-17 directory.

Download Android 16 code in the most space-efficient, reusable way based on the existing Android 17 checkout.

Claude Code executed the downloads automatically and introduced a method the author had not known: using repo init --reference to share objects between the two checkouts, significantly reducing disk usage. The full download process took several hours.

Generating a Focused Diff Report

After the downloads completed, the author asked the agent to compare the simpleperf repository between Android 16 and Android 17, producing an HTML report that presents differences side by side and summarizes newly added features.

The generated report (shown in the article's screenshots) provides a visual diff interface and a high-level summary of feature changes, eliminating the need for manual file-by-file inspection.

Conclusion

Tasks that previously required hours of manual downloading, file comparison, and code reading can now be delegated to a code agent. This frees the developer to focus on higher-level analysis and decision-making rather than mechanical operations.