We just started the scripting beta. Read the announcement and you should be good to go. It has everything you need to know except your imagination.

HUD's broken since Friday's update.

Some new stuff off the top of my head

Player member functions
.SetHealthBuffer() - sets a player's temp health
.GetHealthBuffer() - returns a player's temp health
.IsIncapacitated()
.IsHangingFromLedge()
.IsGhost()

General
TraceLine(traceTable) – uses a configuration table to do a raytrace, puts return information into the table for return usage. Returns false if the trace failed due to an error.
Inputs:
.start, .end – Vectors for the Trace
.ignore – entity handle to ignore as part of the trace
.mask – if you want a specific mask – TRACE_MASK_ALL, _SHOT, _PLAYER_SOLID, _NPC_SOLID, _SHOT, _VISIBLE_AND_NPCS

Outputs:
.hit – did we hit something
.pos – where the traceline ended
.fraction – where the hit occurred
.enthit – handle for entity hit if there is one
.startsolid – did we start in solid

CommandABot(AttackTable);
https://steamhost.cn/steamcommunity_com/groups/L4D2WSVB/discussions/0/846945411144542453/

Dajm! Thanks all! I have so many stuff I want to try, I think I will continue with other projects untill I jump on this. If there is any playtesting to do, give me a shout though.

Also IsPlayerABot( player ) returns true or false.