tf2.engineer_bot_collide_sentry.txt

"Games"
{
	"tf"
	{
		"Addresses"
		{
			"CTraceFilterObject::ShouldHitEntity()::TFBotCollideWithBuildings"
			{
				"signature" "CTraceFilterObject::ShouldHitEntity()"
				"linux"
				{
					"offset"	"422"	// 0x1A6
				}
			}
		}
		"Signatures"
		{
			"CTraceFilterObject::ShouldHitEntity()"
			{
				"library"		"server"
				"linux"			"@_ZN18CTraceFilterObject15ShouldHitEntityEP13IHandleEntityi"
			}
		}
		
	}
}

tf_engineer_bot_collide_sentry.sp

/**
 * Patches collisions so TFBots can't hide inside their buildings.
 * Thanks @Deathreus for the disassembly snooping.
 */
#pragma semicolon 1
#include <sourcemod>

#pragma newdecls required

public void OnPluginStart() {
	Handle hGameConf = LoadGameConfigFile("tf2.engineer_bot_collide_sentry");
	if (!hGameConf) {
		SetFailState("Failed to load gamedata (tf2.engineer_bot_collide_sentry).");
	}
	
	Address patch = GameConfGetAddress(hGameConf, "CTraceFilterObject::ShouldHitEntity()::TFBotCollideWithBuildings");
	
	// yolo patch the jump that checks CBasePlayer::IsBotOfType() and performs additional checks
	StoreToAddress(patch, 0x70, NumberType_Int8);
	
	delete hGameConf;
}

Implementation of the patch using my new Source Scramble extension and manager plugin to do most of the heavy lifting:

"Games"
{
	"tf"
	{
		"MemPatches"
		{
			"CTraceFilterObject::ShouldHitEntity()::TFBotCollideWithBuildings"
			{
				"signature" "CTraceFilterObject::ShouldHitEntity()"
				"linux"
				{
					"offset"	"1A6h"
					"verify"	"\x75"
					"patch"		"\x70"
				}
				"windows"
				{
					"offset"	"9Ah"
					"verify"	"\x74"
					"patch"		"\x71"
				}
			}
		}
		
		"Signatures"
		{
			"CTraceFilterObject::ShouldHitEntity()"
			{
				"library"		"server"
				"linux"			"@_ZN18CTraceFilterObject15ShouldHitEntityEP13IHandleEntityi"
				"windows"		"\x55\x8B\xEC\x51\x8B\xC1\x8B\x0D\x2A\x2A\x2A\x2A"
			}
		}
		
	}
}