Function createFireworksRequest

web/src/llm-api/fireworks.ts:93–164

(params: {
  body: ChatCompletionRequestBody
  originalModel: string
  fetch: typeof globalThis.fetch
  modelIdOverride?: string
  sessionId: string
})

}

function createFireworksRequest(params: {
  body: ChatCompletionRequestBody
  originalModel: string
  fetch: typeof globalThis.fetch
  modelIdOverride?: string
  sessionId: string
}) {
  const { body, originalModel, fetch, modelIdOverride, sessionId } = params
  const fireworksBody: Record<string, unknown> = {
    ...body,
    model: modelIdOverride ?? getFireworksModelId(originalModel),
  }

  // Transform OpenRouter-style `reasoning` object into Fireworks' `reasoning_effort`.
  // Unlike OpenAI, Fireworks supports reasoning_effort together with function tools
  // (e.g. GLM-4.5/5.1 are designed for interleaved reasoning + tool use).
  if (fireworksBody.reasoning && typeof fireworksBody.reasoning === 'object') {
    const reasoning = fireworksBody.reasoning as {
      enabled?: boolean
      effort?: 'high' | 'medium' | 'low'
    }
    if (reasoning.enabled ?? true) {
      fireworksBody.reasoning_effort = reasoning.effort ?? 'medium'
    }
  }
  delete fireworksBody.reasoning

  // Strip OpenRouter-specific / internal fields
  delete fireworksBody.provider
  delete fireworksBody.transforms
  delete fireworksBody.codebuff_metadata
  delete fireworksBody.usage

  // Add strict: true to tool definitions to prevent hallucinated tool call formats
  if (Array.isArray(fireworksBody.tools)) {
    fireworksBody.tools = (
      fireworksBody.tools as Array<Record<string, unknown>>
    ).map((tool) => {
      if (
        tool.type === 'function' &&
        typeof tool.function === 'object' &&
        tool.function !== null
      ) {
        return {
          ...tool,
          function: {
            ...(tool.function as Record<string, unknown>),
            strict: true,
          },
        }
      }
      return tool
    })
  }

  // For streaming, request usage in the final chunk
  if (fireworksBody.stream) {
    fireworksBody.stream_options = { include_usage: true }