contribution VS github-activity-generator

It's probably just counting both the commits in the old and new repo. If you have n commits in the old repo and n commits in the new repo, then you have a total of 2n commits. Whether or not GitHub tracks commits in deleted repos is unclear, but the contributions graph is pretty pointless anyway so I wouldn't worry about it (some people draw pretty pictures on their contributions graph -- e.g. google search gave https://github.com/blaise-io/contribution as an example).

There are a bunch of tools like this already. Here’s my top result for “GitHub contribution graph picture.”

I'll just leave this here: https://github.com/blaise-io/contribution

The contribution graph is definitely something I wouldn't put too much faith in considering there are lot's of projects out there specifically made for drawing pictures in them.

https://github.com/blaise-io/contribution as an example

The commit graph is easy to edit. Here’s a tool that lets you draw a picture. https://github.com/blaise-io/contribution

Or draw lowres pictures on your contribution graph

https://github.com/Shpota/github-activity-generator https://github.com/aljazst/github-contributions-generator

There's tools for that like this one

this

The GitHub activity graph is one of the worst features of GitHub, and it can be easily manipulated. A grid full of little green squares means nothing in terms of quality of work.