AI Agent Skills as Software Artifacts: Versioning, Execution Contracts, Regression Testing & Secure MCP Tools
NicoGIS Tech Weekly · Deep Dive · 10 November 2026 AI Agent Skills as Software Artifacts Versioning, Execution Contracts, Regression Testing & Secure Tool Invocation — A production-oriented architecture for .NET and MCP. AI Agent Skills are becoming a standard mechanism for distributing procedural knowledge to coding assistants and autonomous agents. A skill can describe how to use an SDK, manipulate a repository, generate a report, or interact with an enterprise system. However, distributing instructions is fundamentally different from distributing reliable software. A C# library can be compiled, tested, signed, versioned, and checked for vulnerable dependencies. A Markdown file containing instructions is interpreted probabilistically by an LLM. The same instruction may produce different operations depending on the model, available tools, conversation history, or surrounding documents. The architectural challenge is to make agent behavior testable without assumin...