world_set_start
Category: world
Set which world the game boots into (the start world). Use when: Use to choose the boot-target world; promoting one world clears the start flag on every sibling so exactly one start world remains. Do not use when: Do not flip world.startWorld through project_apply_transaction; the raw op skips the sibling-clear invariant and can leave two start worlds. Expected response time: sync <2s Token cost: medium.
Output: JSON text content from the canonical service adapter.
Input schema
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