My boss verbally assured me they will protect me. Unfortunately not in email or anything i can document. I created a spreadsheet.
You can follow up with an email: "Hi Boss, just wanted to circle back and thank you so much for your reassurances, during our 1x1 meeting on Thursday, that you and your team will ___________ for me. As always, don't hesitate to let me know what else you need from me to make X, Y, and Z happen. I look forward to ironing out these details as quickly as possible so we can return to a 110% focus on the mission. Best, Me88"
If your boss doesn't respond with "I never reassured you of ABC on Thursday" then you have documentation.
One thing that upset me is my boss said, "we won't entertain any accusations. We know your character and youre a good person. We know you wouldn't lay a hand on her". Is she now saying I've hit her? I already know she's turned her boss against me, and my boss nodded that yes my exes boss doesn't like me. So she's silently smearing me and if she's saying I've hit her that is ridiculous. She hit ME. I'm juat going to wait for now and keep my own records.
Find your WiseMind. People say all kinds of things when they hear something emotionally intense. It doesn't necessarily mean that your ex is "turning people against you". It could be the best your boss could come up with to sound reassuring to you, under the circumstances. Sometimes we lean on canned phrases when we don't know exactly what to say. Maybe "we know you wouldn't hit her" means your ex is saying that... maybe not, and it's a canned phrase. Without explicitly asking, it is not possible to know.
Speculation could be described as riding your emotions to a destination you aren't actually required to go.
Give yourself a moment to find some balance. Riding those feelings to that destination might be derailing you from wise, grounded, balanced planning.
This doesn't mean "don't feel the way you feel". Do notice and name what you're feeling. Betrayed? Anxious? Infuriated? Afraid? Hypervigilant? Something else?
My boss also said I'd have to have a workplace conflict to go to HR. But I disagree. I'll go there if she starts getting worse. It sucks that although we broke up last December, I'm forced to be in her presence daily. I can't escape this person. Shes not even part of my department or a federal employee. Works for a contracted non profit. I should have some power.
Is there a policy saying you cannot contact HR first, unless there is a conflict?
Trying to understand if you are prohibited from sending an "informative" email ahead of time to HR.
Certainly, HR probably can't be "activated" or "involved" unless there is a workplace conflict. But if you are OK with them "doing nothing" at this point then it seems like sending HR an "FYI" email couldn't be against the rules?
"Hello HR; While there is not currently any workplace conflict between Ms. Ex and myself, and on my end I intend to keep it that way, I wanted to give you a heads up that there has been past off-worksite conflict between us. I'm currently working with Boss on X, Y, and Z so that I have a protected space to work, and have offered to share relevant police reports and other professional documentation with anyone in management who needs them. Please reach out any time if you need further information from me. If any workplace conflict does arise from Ms. Ex, I will immediately let you know officially, unless you advise another approach. Thank you for your time, Me88"
...
We "shouldn't" have to be around persons who have hurt us so deeply. It feels unfair and impacts our healing process. Yet we get the problems we have, not the problems we wish we had.
I've also had to have face to face contact with persons who deeply hurt and devalued my husband (his kids' mom, uBPD, and her husband -- H's former best friend -- uNPD). It is excruciating. I understand. There was no option for us, for many years, not to have face to face interaction with them. They used to come into our home to pick up the kids.
How do you hope you can comport yourself, and how do you hope you can feel, if you see her at work?
For me, the two unhelpful extremes I'd fall into were: wanting to "dominate" them with my infallible logic (win with power), or freezing/"hoping it would end". Either lots and lots of anger and wanting to "make them see" how wrong they were, or feeling terrified & shut down.
Occasionally I was able to interact from a balanced place. I would assume going in that Mom would be emotionally all over the map and Stepdad would be making power plays. I would plan ahead not to discuss anything besides neutral topics with Mom (though,

, even the weather got debated) and not to share any personal information with either of them. The
B.I.F.F. Technique for Communications helped me preplan for communication.
Keeping my emotional distance -- not falling into showing them what buttons they could push on me, not believing I had to win arguments/demonstrate my power -- was helpful and also required practice and game planning it out ahead of time.
Know that you will likely encounter her at work. Know ahead of time your goals for how you want that to go. Practice ahead of time (you can practice here). Plan what you will do or where you will go after encountering her. Know what tasks you'll have the headspace to accomplish after running in to her. Know that it will be hard and for some reason that is what life is giving you in this season. Know that you aren't alone in having to face hurtful people -- we really understand.