Minecraft has versions and so you need to make sure you match versions. The craft-bukkit I used was for 1.6.4-R2.0 Bukkit was moving on to a 1.7 series release when I grabbed this so it might be ...
Bedrock's official addon and script APIs let you add content, but can hardly modify core gameplay. Custom servers like PocketMine and Nukkit offer that control, but sacrifice vanilla features.