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fix(llm): preserve structured tool errors (#33405)

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Kit Langton 2026-06-22 19:43:07 +02:00 • committed by GitHub
commit 130957288e
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3 changed files with 88 additions and 2 deletions
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11
packages/llm/src/protocols/shared.ts
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@ -19,6 +19,7 @@ export { isRecord }
export const Json = Schema.fromJsonString(Schema.Unknown)
export const decodeJson = Schema.decodeUnknownSync(Json)
export const encodeJson = Schema.encodeSync(Json)
const isJson = Schema.is(Schema.Json)
export const JsonObject = Schema.Record(Schema.String, Schema.Unknown)
export const optionalArray = <const S extends Schema.Top>(schema: S) => Schema.optional(Schema.Array(schema))
export const optionalNull = <const S extends Schema.Top>(schema: S) => Schema.optional(Schema.NullOr(schema))
@ -243,8 +244,14 @@ export const validateToolFile = (route: string, part: ToolFileContent, supported
export const trimBaseUrl = (value: string) => value.replace(/\/+$/, "")
export const toolResultText = (part: ToolResultPart) => {
if (part.result.type === "text" || part.result.type === "error") return String(part.result.value)
if (part.result.type === "content") return encodeJson(part.result.value)
if (part.result.type === "text") return String(part.result.value)
if (part.result.type === "error") {
const value = part.result.value
const prototype =
typeof value === "object" && value !== null && !Array.isArray(value) && Object.getPrototypeOf(value)
const structured = Array.isArray(value) || prototype === Object.prototype || prototype === null
return structured && isJson(value) ? encodeJson(value) : String(value)
}
return encodeJson(part.result.value)
}