This is a recruiter-facing tool that compares a candidate’s resume with their LinkedIn profile PDF (uploaded by the recruiter) and flags mismatches in job titles, dates, roles, skills, and timelines.

I would love some feedback.

So it is going to flag my resume when I tailor it to a job?

My linkedin profile is generic. It gives a fairly broad overview of what I've done. When I apply to a job, I get specific about how my experience matches the posted job description. While dates will still line up, titles and skills won't. All my roles have worn multiple hats, and I'll adapt the title and description to the highlight the hat that matches the job. It would be a false expectation for the resulting resume to fully match LinkedIn.

I respectfully disagree. Your LinkedIn job history should match what your resume says (generally speaking).