A colleague/friend has asked me to review his application for a very large grant, which appears to resemble my PhD thesis.
The backstory is as follows. My PhD thesis was the first detailed study of Phenomenon X. My colleague works in Context C. Phenomenon X is present in Context C.
Three years ago, while we were both PhD students, I suggested to my colleague that we put together a postdoc grant proposal to study Phenomenon X in Context C. We talked informally about being co-PI on the project but made no agreement.
Two years ago, my colleague told me that it would be better if he worked on the grant with someone more senior because we would have less chance together as two fresh PhDs. The idea was that I would be written into the project. My colleague asked me to send him a literature review on Phenomenon X, which I did.
Now, my colleague has sent me the draft of his grant application asking for some assistance and comments. The research questions in the application are nearly word-for-word the same as those in my PhD thesis and the application claims that Phenomenon X has not been studied before. My PhD thesis on Phenomenon X is not mentioned, nor is other relevant work. The literature review in the grant application uses the same sources as my PhD literature review. My name does not appear anywhere in the grant.
What are some appropriate courses of action here? My idea at the moment is to give my colleague the benefit of the doubt - maybe it was unintentional oversight or he had planned to add these details later. I would respond suggesting the grant application includes other work on Phenomenon X, including my PhD thesis, and to make the research questions more original. But I'm worried this will seem too territorial.