More on Hilkhot Shabbat – with a baraita that connects between Hullin and Shabbat. One who cooks on Shabbat without intent, one can eat that food (though the person who cooked it may have to wait until after Shabbat, depending on whom you ask) – even before the end of Shabbat. If it was intentional, then the food can’t be eaten, even after Shabbat, by anyone. Also, what about doing shechitah for someone who is ill on Shabbat, in the event that such a person would need that meat on Shabbat? The ill person is eligible to eat this meat, of course, but can a healthy person eat from that same shechitah that was done on Shabbat? Note the rabbinic decree to prevent the temptation of increasing the cooking on Shabbat. Plus, all tools that are sharp enough and smooth enough will yield a kosher shechitah.