Because:

1. The first significant agentic harness was made by Anthropic.

2. One of the most senior developers of client-side software at Anthropic is Felix Rieseberg, one of the original creators of Electron. [1]

3. After Claude Code blew up, everyone else copied Anthropic.

---

1: https://daringfireball.net/2026/07/claudes_criminally_bad_ma...