Building Codex with Tibo Sottiaux

Name: Building Codex with Tibo Sottiaux
Uploaded: 2026-09-13T00:00:00.000Z
Duration: 4462 s
Channel: The Pragmatic Engineer
Description: Tibo Sottiaux explains how Codex evolved from a Rust open-source CLI into a multi-model engineering system. The conversation connects harness design, model choice, code review, maintenance, and rearchitecture to the practical realities of shipping AI-assisted software.

TPThe Pragmatic Engineer

Full transcript

English

Summary：Tibo Sottiaux explains how Codex evolved from a Rust open-source CLI into a multi-model engineering system. The conversation connects harness design, model choice, code review, maintenance, and rearchitecture to the practical realities of shipping AI-assisted software.

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Core points (3)

1Treat the harness, model, and review loop as one product rather than isolated features.
2Open-source boundaries can accelerate trust and iteration when the system remains disciplined.
3AI-assisted code still creates maintenance and rearchitecture work that teams must deliberately own.