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fix(llm): narrow raw overlays (#34448)

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Shoubhit Dash 2026-06-29 21:18:06 +05:30 • committed by GitHub
commit f7eeb08942
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2 changed files with 70 additions and 5 deletions
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47
packages/llm/src/route/transport/http.ts
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@ -28,9 +28,56 @@ const applyQuery = (url: string, query: Record<string, string> | undefined) => {
return next.toString()
}
const PROTOCOL_BODY_OVERLAY_DENYLIST = new Set([
"content",
"contents",
"frequencyPenalty",
"frequency_penalty",
"generationConfig",
"inferenceConfig",
"input",
"maxTokens",
"max_tokens",
"messages",
"model",
"presencePenalty",
"presence_penalty",
"responseFormat",
"response_format",
"seed",
"stop",
"stopSequences",
"stop_sequences",
"stream",
"streamOptions",
"stream_options",
"system",
"systemInstruction",
"system_instruction",
"temperature",
"thinking",
"toolChoice",
"toolConfig",
"tool_choice",
"tool_config",
"tools",
"topK",
"topP",
"top_k",
"top_p",
])
const forbiddenBodyOverlayKeys = (body: Record<string, unknown>) =>
Object.keys(body).filter((key) => PROTOCOL_BODY_OVERLAY_DENYLIST.has(key))
const bodyWithOverlay = <Body>(body: Body, request: LLMRequest, encodeBody: (body: Body) => string) =>
Effect.gen(function* () {
if (request.http?.body === undefined) return { jsonBody: body, bodyText: encodeBody(body) }
const forbiddenKeys = forbiddenBodyOverlayKeys(request.http.body)
if (forbiddenKeys.length > 0)
return yield* ProviderShared.invalidRequest(
`http.body cannot overlay protocol-owned field(s): ${forbiddenKeys.join(", ")}`,
)
if (ProviderShared.isRecord(body)) {
const overlaid = mergeJsonRecords(body, request.http.body) ?? {}
return { jsonBody: overlaid, bodyText: ProviderShared.encodeJson(overlaid) }