Agent Notes Toolkit (AN): Agent Notes Mechanism as a Portable Toolkit

The Agent Notes Toolkit is a portable toolkit designed for DeepSeek Harness (DSH), aiming to standardize decision records, content formats, and skill systems for agentic workflows. It provides validation gating, scaffolding CLI, CI workflow generation, and skill management features. Users can install it via the official command and use the `an` command to initialize, migrate, validate, and configure presets, streamlining the maintenance process for Agent Notes.