Building a Multi-Model Router and Agent Harness from Scratch
wavefnx · x · 2026-07-20
The author states that their solution is built entirely from scratch—not just a simple modification of existing code, but a complete infrastructure setup.
Core components include:
- HTTP client
- Multi-model / multi-provider routing
- Context usage design
- Terminal graphics renderer
He emphasizes not having looked at anyone else's code, as this harness is just one part of a larger underlying system, with a primary focus on correctness and speed.
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