Fix OpenAPI multipart file field uploads - #1530
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RhysSullivan merged 3 commits intoAug 28, 2026
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@RhysSullivan pls review. |
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Convert tool-file arrays into real file parts before the per-part encoding contentType branch, so a file array is no longer JSON-stringified into one part. A file whose base64 payload does not decode now fails the invocation and names the field instead of sending the envelope as JSON. Scope the extract-side rewrite to the request schema properties map, and within it to a binary property or the direct items of an array property — the two shapes the form encoder builds parts from. Nested files and $ref bodies stay as declared. Descriptions, titles, and nullability carry onto the file schema.
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Summary
Fix OpenAPI multipart
format: binaryfields so they are exposed asToolFileinputs and sent as real multipart file parts instead of plain form fields.Partially addresses #1401 — inline multipart schemas only. $ref-referenced request bodies (including the reported Paperless case) still keep their declared binary strings; see the changeset for why, and a $defs-aware rewrite is the follow-up.
Changes
ToolFileinput schema.ToolFilevalues into multipart file parts with bytes, filename, and content type.Tests
bun run --cwd packages/plugins/openapi test non-json-body.test.tsbun run --cwd packages/plugins/openapi typecheck