Hey RW, good to see you over here. This isn't a silly question... you're noticing areas of conflict in your relationship, and you're wondering how to make them better, or, at least, "not worse".
I've tracked with your story a bit, and my first opinion is that this is indeed:
a normal marriage issue made worse by BPD and ADD
It seems normal to me for there to be a lot of tacit assumptions at play in any relational soup, along with values systems that can align in many ways, though often do not (but aren't explicitly called out). The issue isn't "there are assumptions and different values". That is just part of being human. The issue seems to be that the different assumptions and values systems are grating on each other and causing conflict.
One of her values may be "get the project done ASAP" but it's a tacit value, it wasn't explicitly expressed. One of your values may be "get the project done at the most efficient time", but again it may be a tacit value. Couples can do fine with differing tacit values when they have healthy communication skills. There is a skills deficit with your W that makes an issue that could be a 4/10 for an average marriage more like a 9/10.
Because of how difficult it will be for her to have self awareness that you aren't MAKING her feel forgotten or unimportant -- that those feelings are coming from inside of her and are hers to be responsible for -- it makes sense that for change to happen around this issue, it needs to start with you.
You can't control how she interprets her feelings, but you can make changes on your end to change the dynamic around "remembering to do the project" to take it from a 9/10 to more like a 4/10.
How do you think it would go to have the conversation go like this:
RWwife: honey, can you do this job for me?
RW: sure, I’ll do it now
RWw: not right now, just whenever
RW: ok,
I will get it done by Friday the 11th.I know there could still be an issue with if she remembers the conversation, but it's a small change you could try, so that things are less implicit/tacit/unclear, and you are making moves for there to be clarity and having stuff "out in the open". You could then, like you mentioned, write the task, and YOUR assigned due date, on a list.
And I know that facts and data (like a list of projects, with verbally articulated and then written due dates) don't always "prove" to pwBPD stuff that they are committed to feeling a certain way about. It would be a change, though, yes?
Would love to hear your thoughts...
kells76