After too. Almost every contract of this type explicitly says that it can only be changed in writing, signed by both sides. Early-career, you'll likely get f-e

After too. Almost every contract of this type explicitly says that it can only be changed in writing, signed by both sides. Early-career, you'll likely get f-ed by "boilerplate" contracts, since you don't have the negotiating leverage to push back yet. Expect it. Once you're established, push back or don't join. These kinds of litigations don't make the news often (it's to no one's benefit they become public, and everyone signs an NDA at the end), but they're pretty common.