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Getting Started

  • Getting Started
  • AI Coding Agent & Editor Setup
    • Claude Code Setup
    • Cursor Setup
    • VS Code (Copilot) Setup
    • Windsurf Setup
    • Cline Setup
    • Zed Setup
    • Agent Skills

User Guide

  • User Guide
    • Architecture & Core Concepts
    • Best Practices & Anti-Patterns
    • Framework Comparison
    • Builders
    • Expression Language
    • Data Flow Between Agents
    • Prompt Builder
    • One-Shot Execution
    • Callbacks
    • Presets
    • State Transforms
    • Structured Data
    • Context Engineering
    • Composition Patterns
    • Visibility
    • Transfer Control
    • Memory
    • IR and Backends
    • Execution Backends
    • Temporal Guide
    • Middleware
    • Guards (G Module)
    • Evaluation
    • Testing
    • A2A – Agent-to-Agent Communication
    • A2UI – Agent-to-UI Composition
    • Skills – Composable Agent Packages
    • Building Harnesses – From Agent to Autonomous Runtime
    • Error Reference
    • ADK Samples — Fluent API Ports
      • LLM Auditor
      • Financial Advisor
      • Short Movie Agents
      • Deep Search
      • Brand Search Optimization
      • Travel Concierge

API Reference

  • API Reference
    • Module: agent
    • Module: config
    • Module: executor
    • Module: planner
    • Module: plugin
    • Module: runtime
    • Module: service
    • Module: tool
    • Module: workflow
    • Module: prompt
    • Module: context
    • Module: transforms
    • Module: artifacts
    • Module: middleware
    • Module: tools
    • Module: contracts
    • Module: eval
    • Module: visibility

Cookbook

  • Cookbook — Zero to Symphony
    • Hero Workflows
      • Deep Research Agent — Gemini Deep Research in 20 Lines
      • Customer Support Triage — Multi-Tier Routing with Escalation
      • Code Review Agent — Parallel Analysis with Structured Verdicts
      • Investment Analysis Pipeline — Route, Loop, and Conditional Delivery
      • E-Commerce Order Pipeline — Every Primitive in One System
      • Multi-Tool Task Agent — Tools, Guards, and Dependency Injection
      • Dispatch & Join — Fire-and-Continue Background Execution
    • Deep Research Agent — Gemini Deep Research in 20 Lines
    • Customer Support Triage — Multi-Tier Routing with Escalation
    • Code Review Agent — Parallel Analysis with Structured Verdicts
    • Investment Analysis Pipeline — Route, Loop, and Conditional Delivery
    • E-Commerce Order Pipeline — Every Primitive in One System
    • Multi-Tool Task Agent — Tools, Guards, and Dependency Injection
    • Dispatch & Join — Fire-and-Continue Background Execution

All Recipes (Auto-Generated)

  • Cookbook
    • Email Classifier Agent – Simple Agent Creation
    • Travel Planner with Weather and Flight Lookup – Agent with Tools
    • Content Moderation with Logging – Additive Callbacks
    • Document Processing Pipeline – Sequential Pipeline
    • Market Research Fan-Out – Parallel FanOut
    • Essay Refinement Loop – Loop Agent
    • Product Launch Coordinator – Team Coordinator Pattern
    • Quick Code Review – One-Shot Execution with .ask()
    • Live Translation Pipeline – Streaming with .stream()
    • A/B Testing Agent Variants – Agent Cloning with .clone()
    • Smoke-Testing a Customer Support Bot – Inline Testing with .test()
    • Medical Advice Safety Guardrails – Guardrails with .guard()
    • Customer Support Chat Session with .session()
    • Medical Advice Safety Guards – Guards with .guard()
    • Multi-Department Ticket Routing via Dynamic Field Forwarding
    • Production Deployment – to_app() with Middleware Stack
    • News Analysis Pipeline with Operator Composition: >>, |, *
    • E-Commerce Order Routing with Deterministic Branching
    • Multi-Language Support Routing with Dict >> Shorthand
    • Fraud Detection Pipeline with Conditional Gating
    • Resume Refinement Loop with Conditional Exit
    • Order Processing with Typed State Keys
    • Enterprise Agent with Shared Compliance Preset
    • A/B Prompt Testing for Marketing Copy with .with_()
    • Domain Expert Agent via @agent Decorator
    • Introspection & Debugging – validate(), explain(), inspect()
    • Deployment Pipeline: Serialize Agent Configs with to_dict and to_yaml
    • Senior Architect Delegates to Junior Specialists (LLM-Driven Routing)
    • Investment Analysis Pipeline: Full Expression Language in Production
    • ETL Pipeline: Plain Functions as Data Cleaning Steps (>> fn)
    • Customer Onboarding: Conditional Loops with * until(pred) Operator
    • Structured Invoice Parsing: Typed Output Contracts with @ Operator
    • Knowledge Retrieval: Primary API + Fallback Search with // Operator
    • Research Data Pipeline: State Transforms with S Factories
    • Code Review Pipeline – Expression Algebra in Practice
    • ML Inference Monitoring: Performance Tap for Pure Observation
    • Analytics Data Quality: State Contract Assertions with expect()
    • Mock Testing: Customer Onboarding Pipeline with Deterministic Mocks
    • Retry If: API Integration Agent That Retries on Transient Failures
    • Map Over: Batch Processing Customer Feedback with Iteration
    • Timeout: Real-Time Trading Agent with Strict Execution Deadline
    • Gate: Legal Document Review with Human Approval
    • Race: Fastest-Response Search Across Multiple Providers
    • Primitives Showcase: E-Commerce Order Pipeline Using All Primitives
    • Senior Architect Delegates to Junior Specialists (LLM-Driven Routing)
    • Retry If: API Integration Agent That Retries on Transient Failures
    • Pipeline Optimization with IR – Inspecting, Compiling, and Selecting Backends
    • Middleware: Production Middleware Stack for a Healthcare API Agent
    • Contracts and Testing: Medical Imaging Pipeline with Strict Data Contracts
    • Dependency Injection: Multi-Environment Deployment (Dev/Staging/Prod)
    • Architecture Documentation – Mermaid Diagrams from Live Code
    • Context Engineering: Customer Support Pipeline
    • Capture and Route: IT Helpdesk Triage
    • Visibility: Content Review Pipeline
    • Contract Checking: Catch Data Flow Bugs Before Runtime
    • Insurance Claim Processing: Structured Data Pipelines
    • Customer Service Hub: Agent Transfer Control
    • Deep Research Agent – Gemini Deep Research / Perplexity Clone
    • Customer Support Triage – ADK-Samples Inspired Multi-Tier Support
    • Code Review Agent – Gemini CLI / GitHub Copilot Inspired
    • Multi-Tool Task Agent – Manus / OpenAI Agents SDK Inspired
    • Dispatch & Join: Fire-and-Continue Background Execution
    • StreamRunner: Continuous Userless Agent Execution
    • Dispatch-Aware Middleware: Observability for Background Execution
    • M Module: Fluent Middleware Composition
    • TraceContext and Topology Hooks: Cross-Cutting Observability
    • MiddlewareSchema: Typed Middleware State Declarations
    • Built-in Middleware: CostTracker, LatencyMiddleware, TopologyLogMiddleware
    • T Module: Fluent Tool Composition and Dynamic Loading
    • G Module: Declarative Guard Composition
    • Engine Selection – Backend-Selectable Agent Execution
    • Asyncio Backend – Zero-Dependency IR Interpreter
    • A2UI Basics: Declarative Agent-to-UI Composition
    • Temporal Backend – Durable Execution for Agent Pipelines
    • A2UI Agent Integration: Wiring UI to Agents
    • Compute Layer – Pluggable Model, State, Tool, and Artifact Providers
    • A2UI Operators: UI Composition with |, >>, +
    • A2UI LLM-Guided Mode: Let the LLM Design the UI
    • A2UI Pipeline: UI in Multi-Agent Pipelines
    • Prefect Backend – Flow Orchestration for Agent Pipelines
    • DBOS Backend – Durable Functions for Agent Pipelines
    • Skill-Based Agents – Composable Skills from SKILL.md Files
    • Agent Collaboration Mechanisms — Six Ways Agents Work Together
    • Skill-Powered Harness – Building a CodAct Coding Agent
    • Gemini CLI / Claude Code Clone – Production Coding Agent Harness
    • Recipes by Use Case

Examples

  • Runnable Examples

Guides

  • Decision Guide
  • Migration Guide: Native ADK to adk-fluent

Contributing

  • Contributing
    • Codegen Pipeline
    • Upstream ADK Impact Analysis & Generator Architecture
    • Namespace Robustness: Uniformization & Partial Generation
    • Adding Builders

Project

  • Changelog

Research

  • Skill-Based Agents in adk-fluent: Research & 100x Vision
  • Missing Verbs & Idioms: The Next DX Frontier
  • New Structural Types: Beyond Pipeline, FanOut, Loop
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API Reference¶

Complete API reference for all 135 builders across 9 modules.

Modules¶

Module

Builders

Link

agent

3

agent

config

39

config

executor

6

executor

planner

3

planner

plugin

12

plugin

runtime

3

runtime

service

15

service

tool

51

tool

workflow

3

workflow

prompt

P

prompt

context

C

context

transforms

S

transforms

artifacts

A

artifacts

middleware

M

middleware

tools

T

tools

contracts

—

contracts

eval

—

eval

visibility

—

visibility
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