Function useGenerateVersionDescription

apps/sim/hooks/queries/deployments.ts:434–507

()

 * Hook for generating a version description using AI based on workflow diff
 */
export function useGenerateVersionDescription() {
  return useMutation({
    mutationFn: async ({
      workflowId,
      version,
      onStreamChunk,
      signal,
    }: GenerateVersionDescriptionVariables): Promise<string> => {
      const { generateWorkflowDiffSummary, formatDiffSummaryForDescriptionAsync } = await import(
        '@/lib/workflows/comparison/compare'
      )

      const currentState = await fetchDeploymentVersionState(workflowId, version, signal)

      let previousState = null
      if (version > 1) {
        try {
          previousState = await fetchDeploymentVersionState(workflowId, version - 1, signal)
        } catch {
          // Previous version may not exist, continue without it
        }
      }

      const diffSummary = generateWorkflowDiffSummary(currentState, previousState)
      const diffText = await formatDiffSummaryForDescriptionAsync(
        diffSummary,
        currentState,
        workflowId
      )

      const wandResponse = await requestRaw(
        wandGenerateStreamContract,
        {
          body: {
            prompt: `Generate a deployment version description based on these changes:\n\n${diffText}`,
            systemPrompt: VERSION_DESCRIPTION_SYSTEM_PROMPT,
            stream: true,
            workflowId,
          },
          signal,
        },
        {
          headers: {
            'Cache-Control': 'no-cache, no-transform',
          },
          cache: 'no-store',
        }
      )

      if (!wandResponse.body) {
        throw new Error('Response body is null')
      }

      const { readSSEStream } = await import('@/lib/core/utils/sse')
      const accumulatedContent = await readSSEStream(wandResponse.body, {
        onAccumulated: onStreamChunk,
        signal,
      })