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…
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.
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.
