Python: [BREAKING] Support code-defined agent skills (#4387)

* support code skills

* address pr review comments

* address package and syntax checks

* address pr review comments

* address pr review comment

* address failed check

* rename agentskill and agetnskillprovider

* move agent skills related assets to _skills.py

* address pr review comments

* address review comments
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SergeyMenshykh
2026-03-04 18:36:02 +00:00
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# Code-Defined Agent Skills Sample
This sample demonstrates how to create **Agent Skills** in Python code, without needing `SKILL.md` files on disk.
## What are Code-Defined Skills?
While file-based skills use `SKILL.md` files discovered on disk, code-defined skills let you define skills entirely in Python using `Skill` and `SkillResource` classes. Two patterns are shown:
1. **Basic Code Skill** — Create a `Skill` directly with static resources (inline content)
2. **Dynamic Resources** — Attach callable resources via the `@skill.resource` decorator that generate content at invocation time
Both patterns can be combined with file-based skills in a single `SkillsProvider`.
## Project Structure
```
code_skill/
├── code_skill.py
└── README.md
```
## Running the Sample
### Prerequisites
- An [Azure AI Foundry](https://ai.azure.com/) project with a deployed model (e.g. `gpt-4o-mini`)
### Environment Variables
Set the required environment variables in a `.env` file (see `python/.env.example`):
- `AZURE_AI_PROJECT_ENDPOINT`: Your Azure AI Foundry project endpoint
- `AZURE_OPENAI_RESPONSES_DEPLOYMENT_NAME`: The name of your model deployment (defaults to `gpt-4o-mini`)
### Authentication
This sample uses `AzureCliCredential` for authentication. Run `az login` in your terminal before running the sample.
### Run
```bash
cd python
uv run samples/02-agents/skills/code_skill/code_skill.py
```
### Examples
The sample runs two examples:
1. **Code style question** — Uses Pattern 1 (static resources): the agent loads the `code-style` skill and reads the `style-guide` resource to answer naming convention questions
2. **Project info question** — Uses Pattern 2 (dynamic resources): the agent reads dynamically generated `environment` and `team-roster` resources
## Learn More
- [Agent Skills Specification](https://agentskills.io/)
- [File-based Skills Sample](../basic_skill/)
- [Microsoft Agent Framework Documentation](../../../../../docs/)