Xcode

The entry point is python3 <skill-dir>/scripts/xcode.py, where <skill-dir> is the directory containing this SKILL.md.

Command	Available information or action
`list`	All tool names from the selected Xcode installation.
`describe TOOL [TOOL ...]`	Full descriptions and input/output schemas, including prerequisites. Multiple names share one catalog fetch; each contract is a JSON line.
`call TOOL --args-file /absolute/args.json`	Executes a tool with arguments from a JSON object file (`{}` for tools without parameters) and returns its result.
`call --help`	Timeout and image-output options; `--output-file` saves the raw response, including failures.

Tool names are navigation hints; full contracts describe their capabilities, scope, and execution requirements. Catalogs and contracts already in context can serve later requests on the same Xcode installation and connection. Changes to either can make that information stale.