# Get Recipe Version Changes



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Return a structural diff of `version_id` relative to `compared_to` (defaults to its parent).

`before` holds values at the comparison point; `after` holds values at the subject version.
Only changed top-level fields appear in `data.field_changes`; an empty map means the two
states are equivalent. For rollback preview, pass `compared_to=\{current_head\}` to see what
reverting to `version_id` would change. Diffing a version against itself returns 400.

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