The Agent Skills Directory

[COMMAND_EXECUTION]: The skill instructions in SKILL.md direct the AI agent to perform environment discovery by executing shell commands. The "Companion check" section specifically instructs the agent to run ls on multiple filesystem paths, including ~/.claude/skills/, ~/.agent/skills/, and ~/.agents/skills/. This allows the agent to probe the user's environment for other installed skills without an explicit user command for filesystem access.
[EXTERNAL_DOWNLOADS]: The reference documentation includes code patterns for establishing network connectivity from within automated scripts. references/vba-patterns.md provides implementation details for making HTTP GET requests using MSXML2.XMLHTTP in Excel VBA and using UrlFetchApp.fetch() in Google Apps Script to interact with external APIs.

spreadsheet-modeling