If you spawn near a valley, when it gets dark a skeleton shots you down(or any mob pushing is okay), water push you near a diamond ore, and creeper blows it up

0ms? wat

No, because as soon as you start moving the timer starts.

"Timing starts on first input" as the rules say not when you start moving, but i'm still going to say no.

It would take some very unlikely mob AI, for the creeper to explode without killing you before you pick up the diamond, i think. But it's probably technically possible. I like your way of thinking :)

The other alternative of course is if a creeper walked into the forge on walruswalruswalrus or exploded near it. Tbh literally any "obtain..." That doesn't require crafting could be done in 0ms there will likely be one seed out there that has the right conditions, we play such a big game. I'm still here waiting for a spawn in deser surface dungeon for obtain golden apple :P <- why is this face unhappy?

Technically it's supposed to be allowed, but where is the fun to wait for such a god RnG honestly But I guess we all though about this idea while speedrunning

Waiting for a better beginning time may be also good in other cato, though maybe not till night. Acrogenous obtain TNT can't. Speedrunning should be find a desert temple and hard dig down,but exploding can't get it

Mysterio and ElRich's runs for mine emerald and mine diamond use creeper explosions, I have a seed where you spawn in a ravine but it wouldn't work in this instances, I think technically it is possible to obtain anything / mine anything in. 0 seconds due to creepers, I don't think clicking respawn counts as an input.

Te surface dungeon is less about this more about how Thereotically we could have a similar obtain golden apple seed to the OP obtain diamond seed

updated rules so that player character movement starts timer to prevent this