Kitter

Kitter is a local agent skill manager for developers who work across several projects. It keeps shared skills in one library while letting each project use its own selection, reducing the need to maintain separate copies.

• Shared skill library: Projects link to maintained skill sources, so an update reaches every linked installation; user-level skills can be available across projects.
• Skill sources: Add skills from local folders, GitHub, skills.sh-compatible sources or Claude plugins, and adopt existing installations without moving their source directories.
• Agent visibility: See the skills each agent can discover, including installations outside Kitter, with origins in project and parent folders, user-level installations, built-in capabilities and plugins.
• Context estimates: Per-agent token estimates help you identify skills that add unnecessary context overhead.

The native desktop app and standalone CLI provide separate ways to manage the library. The CLI works without the desktop app, and Kitter also supplies an agent skill.

Skill contents, configuration and source records stay on your machine. Kitter is open source under the Apache 2.0 license. The desktop app and CLI are available for macOS on Apple Silicon and Intel, Windows x64 and Linux x64. The Linux desktop build still needs validation on real systems.