SDK skill for coding agents

The skill in agent-sandbox-sdk/ tells a coding agent how to write this SDK's code. It is a static guide. The SDK does not execute it.

Load it when the task is to write a client or a template (template.yaml, a Dockerfile, commands.py). Operating an existing sandbox with abx or MCP is the CLI skill in the agent-sandbox repository. Deploy, a local health check, and publishing the two packages are a short section at the end of the skill.

The guide covers:

• client code: Sandbox.create, commands.run, run, files, and the built-in provider alicloud-express
• a template: template.yaml, Dockerfile, commands.py with @command and start()
• deploy: abx template deploy (the Python package does not build images)
• test: make test and a local commands.py health check
• publish: one version for both packages, released from GitHub

The skill directory is agent-sandbox-sdk. Copy that directory so SKILL.md sits in a folder named agent-sandbox-sdk. The name in the frontmatter matches that folder. Extra template notes live in references/templates.md beside it.

Writing a new provider plugin is a separate skill, agent-sandbox-provider.