Harness profile

Claude Code

Proprietary (custom license + commercial terms)TypeScript142k GitHub stars (Aug 2026)

MakerAnthropic

LicenseProprietary (custom license + commercial terms)

StackTypeScript

ModelsAnthropic models only

Runs whereManaged product on a subscription

Behavior changed byMarkdown instruction files (CLAUDE.md / AGENTS.md)

Durable memoryThin by design

Drives other agentsNo

Best for

Teams standardized on Anthropic models who want the most-used coding harness with the least setup.

Main weakness

One vendor's models, and thin on durable memory by design.

Official docs / repo · Not sure? Run the chooser

Profile facts from the winder.ai comparison of nine agent harnesses (table checked Aug 19, 2026; DeepSeek Harness star count updated Sep 25, 2026 from the live GitHub repo) and vendor documentation. If something here is stale, the vendor page wins - tell us via the kit signup and we will fix it.