google--adk-python/contributing/samples/environment_and_skills/skills

ADK Skills Agent Sample

Overview

This sample demonstrates how to use Skills and the SkillToolset in ADK.

Skills are specialized folders of instructions, reference materials, assets, and scripts that extend an agent's capabilities. The agent can dynamically search for, load, and run resources/scripts from these skills depending on the user's query.

This sample showcases:

1. Programmatic Skills: Creating a skill directly within Python (support-hours-skill).
2. Directory-based Skills: Loading a skill from a directory structure (weather-skill).
3. Skill Metadata & Additional Tools: Declaring that a skill requires specific tools, making them dynamically active only when that skill is loaded.
4. Script Execution: Executing a Python script inside a skill using a code executor.

Sample Inputs

• What are the support hours for Tokyo?

  Triggers the support-hours-skill which checks get_timezone and reads support_policy.txt

• What is the current weather in SF?

  Loads weather-skill and reads weather_info.md reference file

• Can you fetch the current humidity for Mountain View?

  Executes scripts/get_humidity.py via run_skill_script

• What is the wind speed in Seattle?

  Loads weather-skill which dynamically activates and calls get_wind_speed

Graph

graph TD
    Agent[Agent: skills_agent] --> Toolset[SkillToolset]
    Toolset --> Skill1[support-hours-skill]
    Toolset --> Skill2[weather-skill]

    Skill1 --> Resource1["Resource: support_policy.txt"]
    Skill1 --> Tool1["Dynamic Tool: get_timezone"]

    Skill2 --> Resource2["Resource: weather_info.md"]
    Skill2 --> Script1["Script: get_humidity.py"]
    Skill2 --> Tool2["Dynamic Tool: get_wind_speed"]

How To

1. Declaring a Skill Programmatically

You can declare a skill in Python code using models.Skill:

from google.adk.skills import models

support_hours_skill = models.Skill(
    frontmatter=models.Frontmatter(
        name="support-hours-skill",
        description="A skill to check customer support hours...",
        metadata={"adk_additional_tools": ["get_timezone"]},
    ),
    instructions="Step 1: Look up the timezone... Step 2: Read 'references/support_policy.txt'...",
    resources=models.Resources(
        references={
            "support_policy.txt": "Customer support is available Monday through Friday...",
        },
    ),
)

2. Loading a Skill from a Directory

Skills can be organized as folders. Each folder must contain a SKILL.md file. The folder structure typically looks like:

weather-skill/
├── SKILL.md
├── references/
│   └── weather_info.md
└── scripts/
    └── get_humidity.py

To load a skill from a directory:

from google.adk.skills import load_skill_from_dir

weather_skill = load_skill_from_dir(
    pathlib.Path(__file__).parent / "skills" / "weather-skill"
)

3. Registering a SkillToolset

Use SkillToolset to bundle all your skills and any dynamic tools. Then pass this toolset to your agent's tools list:

from google.adk.tools.skill_toolset import SkillToolset
from google.adk.code_executors.unsafe_local_code_executor import UnsafeLocalCodeExecutor

my_skill_toolset = SkillToolset(
    skills=[support_hours_skill, weather_skill],
    additional_tools=[GetTimezoneTool(), get_wind_speed],
    code_executor=UnsafeLocalCodeExecutor(),
)

root_agent = Agent(
    name="skills_agent",
    tools=[my_skill_toolset],
)