Nothing here is particularly polished or complete — if you're looking for a working demo, this probably isn't the branch you're looking for!
These "codetags" help to quickly grep for different categories of information throughout the codebase that's useful to keep track of.
FIXME — Issues that need addressing before the code can be considered stable or completeTODO — Features that can be added, but that aren't essential for completeness or stabilitySAFETY — Lays out the reasoning for why code that could theoretically panic, never will (e.g. justifying the use of .unwrap())PERF — Flags up where future performance optimizations could be madeDESIGN — Explains why things were done the way they were: which alternatives were discarded and why, and which downsides were explicitly acceptedMISSING — Explains an intentional omission, or why something expected to be there isn'tNOTE — Yes, I know this code is a bit unusual... Let me explain myself...