Cool! Have you considered running a monitor and publishing NP-66 events by chance? Also: 
Discussion
Only after the crawlr and blastr are done and WoT is implemented in grain. Grain is my priority. After I feel like it's in good shape, I'll make the crawlr do more.
Looks cool! Something like Khatru?
Waaaay more than Khatru. Here's the config for a good idea of the current capability. My objective is a highly configurable relay to cover a multitude of use cases. Uses mongodb but more databases are planned, way later...
https://github.com/0ceanSlim/grain/blob/main/app%2Fstatic%2Fexamples%2Fconfig.example.yml
Ah, ok, so much different. Khatru is more of a framework whereas this looks something closer to nostream where there are baked in policies you can configure. I like that there's fine grained control over resources. Can't wait to try it!
I want to do some more resource control with database size but I'm waiting until I get the majority of everything else done and add multi db support since I'll have to do different functions to check the size depending on the database you use.
Then I can tie in purging with a database size limit.