edict_T is a typedef created in g_local.h and is used across the entire bots programming. It house many variables and can be considered to be the memory of the bot for many areas.
More info at http://developer.valvesoftware.com/wiki/Edict_t

In it's creation the edict_T creates additional copies to house the same variables in order to keep track of things like target data.

Note to self: * in front of a variable name indicates pointer.

--------

g_main.c would appear to be called first I think. Or at least it calls ClientThink, but before that it calls SpawnEntities.

-------------

SpawnEntities takes in 3 chars. *mapname, *entities, *spawnpoint. The actual function is in g_spawn.c edict_t is created here first thing (It is called everywhere).
Sets aside memory space for item index and lazer index
Sets skill level of bot based off of floor (skill->value)? if it exceeds a number (4) it resets to 4.
Saves the data.
freetags?
Sets aside memory for size of level and number of spawn points.
recieves other player g_edicts information
sets ent... with passed values of world?
checks deathmatch/CTF status of world?
fixes laser index.
Bunch of CTF stuff

Two functions to note: PlayerTrail_Init which is found in p_trail.c and ED_CallSpawn

----------

ED_CallSpawn (edict_t *ent) also found in g_spawn.c. Goes through each item and saves the number of each type of item and records all the data for that type of item.
Check normal spawn functions?

Finishes with g_spawn.c for the moment.

--------

ClientThink is then called from g_main.c. edict_t *ent, usercmd_t *cmd are passed. ClientThink is found in p_client.c
Checks on the bots current target, and if gone then sets the target value to null?
Calculates the bots maximun jumping distance straight up.