Scan for malicious code in git diff between a tag/commit and HEAD
$npx -y skills add dyoshikawa/rulesync --skill security-scan-diffInstalls into the current project.
Run `npx skills use "https://github.com/dyoshikawa/rulesync" --skill "dyoshikawa/rulesync/security-scan-diff"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/dyoshikawa/rulesync" that are relevant to the current task. Run `npx skills add "https://github.com/dyoshikawa/rulesync"` and select the relevant skills, then follow their instructions.