I work as a cloud engineer. With so many years of being in this business. I have developer many custom utilities do to a lot of stuff much faster with cloud providers. a lot of it are custom scripts python /bash / that helps me do a lot of my work more efficiently. These are tools that have grown over time that do help me a lot and mainly i use them myself just to make my job more efficient. During a presentation i had my boss saw my utility folder on my terminal and asked me about it. I showed it and then said I should put that into a git repo and make it accessible for everyone. I told him that I am not interested in doing that because this is NOT company code as it existed before and also the repo only makes sense to me and that I don't think i want to make this into a company asset to then maintain it for the company.

These are utilities that have grown through time a provide a lot of value for me but i don't feel comfortable sharing this. Is my employer allowed to ask me to submit this code and give it to them so that other engineers can use it and probably i have to then support it. ?