Parent State ID: 0
State Depth: 1
Action Taken: stack(block_d, block_c)
Action Reasoning: We need to stack block `d` onto block `c` because this action starts building the base for the goal configuration.
State Description: Block a is on the table and remains clear. Block b is on block c and clear. Block c is on the table, now supporting both block b and block d. Block d is now on block c and clear. The hand is empty.
Action Path: ['stack(block_d, block_c)']

INACTIVE REASON: deactivated because diagram generation failed or invalid action chosen: The action's preconditions are not satisfied: the hand is not holding block_d, and block_c is not clear.
