tl;dr: A community-compiled inventory documents ChatGPT's internal Work tooling, cataloging 232 tool interfaces and 44 skill definitions with verbatim SKILL.md sources and TypeScript declarations. Skills cover domains like document/spreadsheet/PDF creation, data analytics, site building, sub-agent orchestration, and even animated "Work Pets," while tools expose primitives including apply_patch, exec_command, web.run, image generation, MCP resources, sub-agent spawning, and automations with webhook triggers for Gmail/Slack/GitHub. It's essentially a leaked-style reference of how ChatGPT's agentic Work mode is wired under the hood.