Codex Rebuilds Holiday Extras App in Two Weeks

This is a strong case for coding agents as force multipliers across product and engineering teams, though the reported business gains remain company-attributed rather than independently verified.

• –Codex let customer-facing expertise flow directly into working iOS and Android software.
• –Engineers focused on architecture, APIs, security, and workflows while Codex accelerated implementation.
• –Weekly releases replace an annual major-release cycle, shortening feedback loops dramatically.
• –The conversion and error-rate comparisons span different periods, so causation should be interpreted cautiously.
• –The bigger shift is organizational: software development becomes accessible beyond dedicated engineers.