NodeTool Workflow Cookbook

A comprehensive guide for building AI workflows with NodeTool

Version: 1.0 Target Audience: AI Agents, Developers, and Workflow Designers Purpose: Learn workflow patterns, understand streaming architecture, and build production-ready AI workflows

Table of Contents

  1. Detailed Workflow Examples
  2. Core Concepts
  3. Streaming Architecture
  4. Workflow Patterns

Detailed Workflow Examples

For step-by-step guides with detailed explanations and Mermaid diagrams, browse our Workflow Examples Gallery.

Highlighted Examples:

View all 19+ workflow examples →

Core Concepts

What is a NodeTool Workflow?

A NodeTool workflow is a Directed Acyclic Graph (DAG) where:

  • Nodes represent operations (processing, generation, transformation)
  • Edges represent data flow between nodes
  • Execution follows dependency order automatically
Input → Process → Transform → Output

Key Principles

  1. Data Flows Through Edges: Nodes connect via typed edges (image → image, text → text, etc.)
  2. Asynchronous Execution: Nodes execute when dependencies are satisfied
  3. Streaming by Default: Many nodes support real-time streaming output
  4. Type Safety: Connections enforce type compatibility

Node Types

Type Purpose Examples
Input Nodes Accept parameters StringInput, ImageInput, AudioInput
Processing Nodes Transform data Resize, Filter, ExtractText
Agent Nodes LLM-powered logic Agent, Summarizer, ListGenerator
Output Nodes Return results ImageOutput, StringOutput, Preview
Control Nodes Flow control Collect, FormatText
Storage Nodes Persistence CreateTable, Insert, Query

Streaming Architecture

Why Streaming?

NodeTool workflows support streaming execution for:

  • Real-time feedback: See results as they’re generated
  • Lower latency: Start processing before all data arrives
  • Better UX: Progress indicators and incremental results
  • Efficient memory: Process large data in chunks

Streaming Nodes

Nodes that support streaming output:

  • Agent: Streams LLM responses token by token
  • ListGenerator: Streams list items as they’re generated
  • RealtimeAgent: Streams audio + text responses
  • RealtimeWhisper: Streams transcription as audio arrives
  • RealtimeAudioInput: Streams audio from an input source

Data Flow Patterns

Pattern 1: Sequential Pipeline

Input → Process → Transform → Output

Each node waits for previous node to complete.

Pattern 2: Parallel Branches

        → ProcessA → OutputA
Input →
        → ProcessB → OutputB

Multiple branches execute in parallel.

Pattern 3: Streaming Pipeline

Input → StreamingAgent → Collect → Output
         (yields chunks)

Data flows in chunks, enabling real-time updates.

Pattern 4: Fan-In Pattern

SourceA →
         → Combine → Process → Output
SourceB →

Multiple inputs combine before processing.

Workflow Patterns

To build any example: – press Space to add nodes – drag connections – press Ctrl/⌘+Enter to run – add Preview nodes to inspect intermediate results

Pattern 1: Simple Pipeline

Use Case: Transform input → process → output

Example: Image Enhancement

graph TD image_output["ImageOutput"] image_input["ImageInput"] sharpen["Sharpen"] auto_contrast["AutoContrast"] image_input --> sharpen sharpen --> auto_contrast auto_contrast --> image_output

When to Use:

  • Simple data transformations
  • Single input, single output
  • No conditional logic needed

Pattern 2: Agent-Driven Generation

Use Case: LLM generates content based on input

Example: Image to Story

graph TD image_input["Image"] agent_story["Agent (Story Generator)"] preview_audio["Preview (Audio)"] comment_workflow["Comment"] text_to_speech["TextToSpeech"] image_input --> agent_story agent_story --> text_to_speech text_to_speech --> preview_audio

When to Use:

  • Creative generation tasks
  • Multimodal transformations (image→text→audio)
  • Need semantic understanding

Key Nodes:

  • Agent: General-purpose LLM agent with streaming
  • Summarizer: Specialized for text summarization
  • ListGenerator: Streams list of items

Pattern 3: Streaming with Multiple Previews

Use Case: Show intermediate results during generation

Example: Movie Poster Generator

graph TD strategy_llm["Agent (Strategy)"] strategy_template_prompt["String (Strategy Template)"] strategy_preview["Preview (Strategy)"] strategy_prompt_formatter["FormatText (Strategy)"] movie_title_input["StringInput (Title)"] genre_input["StringInput (Genre)"] audience_input["StringInput (Audience)"] image_preview["Preview (Image)"] prompt_list_generator["ListGenerator"] designer_instructions_prompt["String (Designer Instructions)"] preview_prompts["Preview (Prompts)"] mflux["MFlux"] strategy_llm --> strategy_preview strategy_template_prompt --> strategy_prompt_formatter strategy_prompt_formatter --> strategy_llm strategy_llm --> prompt_list_generator designer_instructions_prompt --> prompt_list_generator audience_input --> strategy_prompt_formatter movie_title_input --> strategy_prompt_formatter genre_input --> strategy_prompt_formatter prompt_list_generator --> preview_prompts prompt_list_generator --> mflux mflux --> image_preview

When to Use:

  • Complex multi-stage generation
  • User needs to see progress
  • Agent planning + execution workflow

Key Concepts:

  • Strategy Phase: Agent plans approach
  • Preview Nodes: Show intermediate results
  • ListGenerator: Streams generated prompts
  • Image Generation: Final output

Pattern 4: RAG (Retrieval-Augmented Generation)

Use Case: Answer questions using documents as context

Example: Chat with Docs

graph TD chat_input["ChatInput"] string_output["StringOutput (Answer)"] format_text["FormatText"] hybrid_search["HybridSearch"] agent["Agent"] chat_input --> format_text chat_input --> hybrid_search hybrid_search --> format_text format_text --> agent agent --> string_output

When to Use:

  • Question-answering over documents
  • Need factual accuracy from specific sources
  • Reduce LLM hallucinations

Key Components:

  1. Search: Query vector database for relevant documents
  2. Format: Inject retrieved context into prompt
  3. Generate: Stream LLM response with context

Related Workflow: Index PDFs

graph TD list_files["ListFiles"] collection["Collection"] load_document["LoadDocumentFile"] extract_text["ExtractText"] index_chunks["IndexTextChunks"] sentence_splitter["SentenceSplitter"] path_to_string["PathToString"] extract_text --> sentence_splitter load_document --> extract_text sentence_splitter --> index_chunks collection --> index_chunks list_files --> load_document list_files --> path_to_string path_to_string --> sentence_splitter

Pattern 5: Database Persistence

Use Case: Store generated data for later retrieval

Example: AI Flashcard Generator with SQLite

graph TD topic_input["StringInput (Topic)"] create_table["CreateTable"] format_prompt["FormatText"] generate_flashcards["DataGenerator"] insert_flashcard["Insert"] query_all["Query"] display_result["Preview"] topic_input --> format_prompt format_prompt --> generate_flashcards generate_flashcards --> insert_flashcard create_table --> query_all create_table --> insert_flashcard query_all --> display_result

When to Use:

  • Need persistent storage
  • Building apps with memory
  • Agent workflows that need to recall past interactions

Key Nodes:

  • CreateTable: Initialize database schema
  • Insert: Add records
  • Query: Retrieve records
  • Update: Modify records
  • Delete: Remove records

Database Flow:

  1. Create table structure
  2. Generate data with agent
  3. Insert into database
  4. Query and display results

Pattern 6: Email & Web Integration

Use Case: Process emails or web content

Example: Summarize Newsletters

graph TD gmail_search["GmailSearch"] email_fields["EmailFields"] summarizer_streaming["SummarizerStreaming"] preview_summary["Preview (Summary)"] preview_body["Preview (Body)"] gmail_search --> email_fields email_fields --> summarizer_streaming summarizer_streaming --> preview_summary email_fields --> preview_body

When to Use:

  • Automate email processing
  • Monitor RSS feeds
  • Extract web content

Key Nodes:

  • GmailSearch: Search Gmail with queries
  • EmailFields: Extract email metadata
  • FetchRSSFeed: Get RSS feed entries
  • GetRequest: Fetch web content

Pattern 7: Realtime Processing

Use Case: Process streaming audio/video in real-time

Example: Realtime Agent

graph TD audio_input["RealtimeAudioInput"] preview_output["Preview"] realtime_agent["RealtimeAgent"] audio_input --> realtime_agent realtime_agent --> preview_output

When to Use:

  • Voice interfaces
  • Live transcription
  • Interactive audio applications

Key Nodes:

  • RealtimeAudioInput: Streaming audio input
  • RealtimeAgent: OpenAI Realtime API with streaming
  • RealtimeWhisper: Live transcription
  • RealtimeTranscription: OpenAI transcription streaming

Pattern 8: Multi-Modal Workflows

Use Case: Convert between different media types

Example: Audio to Image

graph TD stable_diffusion["StableDiffusion"] whisper["Whisper"] audio_input["AudioInput"] image_output["ImageOutput"] whisper --> stable_diffusion audio_input --> whisper stable_diffusion --> image_output

When to Use:

  • Converting between media types
  • Creating rich multimedia experiences
  • Accessibility applications

Common Chains:

  • Audio → Text → Image
  • Image → Text → Audio
  • Video → Audio → Text → Summary

Pattern 9: Advanced Image Processing

Use Case: AI-powered image transformations

Example: Style Transfer

graph TD stable_diffusion_control_net_img2img["StableDiffusionControlNetImg2Img"] image_input_1["ImageInput"] image_input_2["ImageInput"] image_output["ImageOutput"] canny["Canny"] image_to_text["ImageToText"] fit_1["Fit"] fit_2["Fit"] stable_diffusion_control_net_img2img --> image_output canny --> stable_diffusion_control_net_img2img image_to_text --> stable_diffusion_control_net_img2img image_input_2 --> fit_1 image_input_1 --> fit_2 fit_2 --> canny fit_2 --> image_to_text image_input_2 --> stable_diffusion_control_net_img2img fit_2 --> stable_diffusion_control_net_img2img

When to Use:

  • Style transfer between images
  • Controlled image generation
  • Preserving structure while changing style

Key Techniques:

  • ControlNet: Preserve structure with edge detection
  • Image-to-Text: Generate descriptions
  • Img2Img: Transform while maintaining composition

Pattern 10: Data Processing Pipeline

Use Case: Fetch, transform, and visualize data

Example: Data Visualization Pipeline

graph TD preview_1["Preview"] get_request["GetRequest"] import_c_s_v["ImportCSV"] filter["Filter"] chart_generator["ChartGenerator"] preview_2["Preview"] get_request --> import_c_s_v import_c_s_v --> filter filter --> preview_1 filter --> chart_generator chart_generator --> preview_2

When to Use:

  • Fetch external data sources
  • Transform and filter datasets
  • Auto-generate visualizations

Key Nodes:

  • GetRequest: Fetch web resources
  • ImportCSV: Parse CSV data
  • Filter: Transform data
  • ChartGenerator: AI-generated charts with Plotly

Quick Reference: Choose Your Pattern

I want to

Generate creative content: → Use Pattern 2 (Agent-Driven Generation) → Nodes: Agent, ListGenerator, image/audio generators

Answer questions about documents: → Use Pattern 4 (RAG) → First: Index documents with IndexTextChunks → Then: Query with HybridSearch + Agent

Process emails automatically: → Use Pattern 6 (Email Integration) → Nodes: GmailSearch, EmailFields, Classifier/Summarizer

Build a voice interface: → Use Pattern 7 (Realtime Processing) → Nodes: RealtimeAudioInput, RealtimeAgent

Store data persistently: → Use Pattern 5 (Database Persistence) → Nodes: CreateTable, Insert, Query

Transform images with AI: → Use Pattern 9 (Advanced Image Processing) → Nodes: StableDiffusionControlNet, Canny, ImageToText

Process audio/video: → Check Audio/Video examples → Nodes: Whisper, AddSubtitles, RemoveSilence

Fetch and visualize data: → Use Pattern 10 (Data Processing Pipeline) → Nodes: GetRequest, ImportCSV, ChartGenerator

Conclusion

This cookbook provides patterns and examples for building production-ready NodeTool workflows. Key takeaways:

  1. Start Simple: Begin with basic pipelines, add complexity as needed
  2. Use Streaming: Leverage streaming for better UX and performance
  3. Preview Often: Add Preview nodes to debug and validate
  4. Combine Patterns: Mix patterns to create sophisticated workflows
  5. Test Incrementally: Build workflows step by step, testing each addition

Next Steps

  1. Explore Examples: Try running the example workflows in this cookbook
  2. Build Your Own: Start with a simple pattern and customize it
  3. Share Workflows: Export and share your workflows with the community
  4. Extend NodeTool: Create custom nodes for specific use cases

Resources

  • MCP Server: Use export_workflow_digraph to visualize workflows
  • Node Search: Use search_nodes to discover available nodes
  • Documentation: Check node descriptions with get_node_info

Version: 1.0 Last Updated: 2025-10-12 Generated with: NodeTool MCP Server + Claude Code