Skills

LocalSkills loads validated skill packages from disk. Skills combines one or more loaders and gives an Agent three tools for reading instructions, reading references, and reading or executing scripts. This lesson serves that Agent through AgentOS and verifies a real skill-script execution through the run API.

Files

File	What it teaches
`README.md`	Lesson setup, execution flow, and local-skill contract.
`TEST_LOG.md`	Direct-script, live AgentOS, and focused validation evidence.
`basic.py`	Serve a skills Agent and run the end-to-end HTTP proof with `--demo`.
`sample_skills/system-info/SKILL.md`	Define validated skill metadata and model-facing instructions.
`sample_skills/system-info/scripts/get_system_info.py`	Return host and Python runtime facts as JSON.
`sample_skills/system-info/scripts/list_directory.py`	Return a sorted one-level directory inventory as JSON.

Run the AgentOS lesson

Set up the demo environment and export the provider key:

bash

./scripts/demo_setup.sh
export OPENAI_API_KEY=...

Start the server:

bash

.venvs/demo/bin/python cookbook/05_agent_os/23_skills/basic.py

In another terminal, run the proof client:

bash

.venvs/demo/bin/python cookbook/05_agent_os/23_skills/basic.py --demo

The client checks /health and /config, sends a non-streaming request to POST /agents/skills-agent/runs, and rejects the response unless the recorded tool sequence includes:

get_skill_instructions for system-info;
get_skill_script for get_system_info.py with execute=True; and
a zero return code plus valid JSON in the script's stdout.

Use AGENT_OS_PORT to move the server from port 7777 and AGENT_OS_BASE_URL to point the demo client at that port.

Run the scripts directly

Both scripts are standalone executables as well as Agent skill resources:

bash

.venvs/demo/bin/python \
  cookbook/05_agent_os/23_skills/sample_skills/system-info/scripts/get_system_info.py

.venvs/demo/bin/python \
  cookbook/05_agent_os/23_skills/sample_skills/system-info/scripts/list_directory.py \
  cookbook/05_agent_os/23_skills/sample_skills/system-info

Each successful command exits 0 and writes one JSON document. The directory script writes a JSON error to standard error and exits nonzero if the supplied path cannot be read.

Local skill contract

Point LocalSkills at either one skill directory or a parent containing multiple skill directories. Validation is enabled by default, so each skill must contain a valid SKILL.md whose lowercase name matches its directory. Wrapping the loader in Skills eagerly loads the packages and registers the three skill tools on the Agent.

Script names are resolved only from the skill's scripts/ directory. Execution uses the skill directory as the working directory, rejects traversal outside that package, and returns structured stdout, stderr, and returncode fields. Treat loaded skills as executable code: review and control who can write them before enabling script execution in a production AgentOS.