Pre-release Harn is pre-1.0 — the language, standard library, and CLI may change between releases. See the release notes

Concepts

These pages explain how Harn fits together. They do not replace the syntax reference or a task guide.

Read first#

If you want to...Read...
See how the main pieces fit togetherMental model
Choose between a call, loop, workflow, or workerChoosing an abstraction
Find the exact meaning of a Harn termGlossary
Understand the Harn/host boundaryHost boundary
Compare Harn terms with other agent toolsComing from elsewhere

If you need to ship code#