Variable useAgentPatchConst Alpha

Schema-aware patching with Sanity Agent Actions.

• Validates provided paths/values against the document schema and merges object values safely.
• Prevents duplicate keys and supports array appends (including after a specific keyed item).
• Accepts documentId or targetDocument (mutually exclusive).
• Optional async, noWrite, conditionalPaths.

Returns a stable callback that triggers the action and resolves a Promise with the patch result.