Are there any other docs for Runic outside of the Oscean Lexicon in lexicon.ndtl?
I think that the best way to understand how Runic works is actually to look at the source code itself, it's a tiny file written in such a way that it should be self explanatory.
Have you built any tools for quick conversion of Neralie and Arvelie?
If you type ~help in the Oscean search bar, you will see the ~atog, and ~gtoa, commands that will handle that conversion.
~atog 19l06 # 2019-06-09
~gtoa 2019-06-09 # 19L06
What is the CODE value under horaire.tbtl I see sometimes it's +000 and others its -xxx or !xxx?
You can see the CODE usage in the source code.
+ event
! featured
- default
Are there any helper functions I should be aware of for adding entries and updates to the journal, tracker & calendar or are you manually editing flat files for those commits each time? Are there any admin interfaces for Oscean?
The database formats are designed to be human readable so I wouldn't need admin interfaces. I find that using a solid IDE gives me a lot more control to edit this data than any web interface I could design.