This skill should be used when the user wants to "write agent code", "build an agent with ADK", "add a tool", "create a callback", "define an agent", "use state management", or needs ADK (Agent Development Kit) Python API patterns and code examples. Part of the Google ADK skills suite. It provides a quick reference for agent types, tool definitions, orchestration patterns, callbacks, state management, and reference recipes to study. Do NOT use for scaffolding (use google-agents-cli-scaffold) or…
All-time #262Trending #50Hot #7First seen Apr 21, 2026
Quick reference for ADK Python patterns: agents, tools, callbacks, and state management.
Covers agent creation with model and instruction configuration, basic tool definition via FunctionTool, and callback patterns for state initialization and lifecycle hooks Includes built-in tool imports, agent orchestration (SequentialAgent, ParallelAgent, LoopAgent), and state management through CallbackContext ADK 2.0 Workflow API available as opt-in experimental feature for graph-based pipelines with conditional routing and parallel processing; requires Python 3.11+ and explicit user consent before use Requires an existing scaffolded project; use agents-cli scaffold create or scaffold enhance before writing agent code
Similar popular skills
Related neighbors and high-traction skills in the same topics — useful to compare before installing.
This skill serves as a comprehensive technical reference and cheatsheet for the Google Agent Development Kit (ADK). It provides developers with code patterns, configuration examples, and CLI commands for building AI agents. All referenced packages, tools, and documentation links are part of the official vendor ecosystem.
Files included with this skill beyond the listing page.
skill mdSKILL.md3,937 B
docsSUMMARY.md576 B
History
First seen on skills.sh
First recorded snapshot · 164,400 installs
SKILL.md
ADK Code Reference
Activate /google-agents-cli-workflow first for required development phases and scaffolding steps.
1. Study Recipes (No Project Needed)
Read the topic index in references/samples.md before answering "how do I build X". Worked implementations exist for: sandboxed/per-user code execution, agent-loadable SKILL.md skills, cross-session memory, approval gates before risky actions, tool guardrails, per-user credentials, and scheduled/event-driven runs.
The index only gives you a name; the recipe is the code. Clone it and read its AGENTS.md before you implement anything it covers. Hand-writing a Docker or E2B sandbox wrapper, a skill loader, a moderation callback or a memory store — for a capability the index lists — means you stopped at the name.
2. Prerequisites for Writing Code
Do NOT write agent code until a project is scaffolded.
Verify project: run agents-cli info (proceed if config exists).
New project: run agents-cli scaffold create <name>.
Existing code: run agents-cli scaffold enhance ..
Language Support: This reference covers the Python ADK SDK. Support for other languages coming soon.
Quick Reference — Most Common Patterns
from google.adk.agents import Agent
def get_weather(city: str) -> dict:
"""Get current weather for a city."""
return {"city": city, "temp": "22°C", "condition": "sunny"}
root_agent = Agent(
name="my_agent",
model="gemini-3.7-flash",
instruction="You are a helpful assistant that ...",
tools=[get_weather],
)
References
Use cheatsheets for common patterns. For deep knowledge, fetch the docs index or inspect the installed package.
Reference
When to read
references/samples.md
Topic-indexed catalog of ADK reference recipes. Read in workflow Phase 1 — before scaffolding and before writing code — maps a capability to the recipe that implements it.
