Everywhere an X-Sum

Standard sudoku rules apply: each row, column, and 3x3 box must contain all the digits from 1 to 9.

Clues outside the grid are omnidirectional x-sums. In all vertical, horizontal, and diagonal directions which are available, the clue is an x-sum clue. The sum of the first N digits along a direction must sum to the value of the clue; N is the first digit in that direction from the clue.