Asana Completes Five-Year Test Migration in Two Weeks with Codex
OpenAI states the frontend test switch from Enzyme to React Testing Library took two weeks.
TLDR
OpenAI posted that Asana completed a frontend test migration from Enzyme to React Testing Library using Codex. The post states the work finished in two weeks after an internal estimate of five years. Posts in the thread add that token costs totaled $12k. Greg Brockman shared the same claim. Multiple engineers replied that the five-year figure was unrealistic before Codex and that a motivated engineer could have completed the task during a short code freeze without AI assistance.
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Wes Roth@WesRothAsana says OpenAI Codex completed an engineering migration it had expected to take at least five years in about two weeks, for roughly $12,000 in model and infrastructure costs. The project: removing Enzyme, an outdated testing system that had become a blocker to upgrading…
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ND Nick Dobos@NickADobosIf in 2026 you are estimating any engineering project taking 5 years… not gonna make it. This is so ridiculous of an estimate that I would fire whoever came up with it on the spot https://twitter.com/openaidevs/status/2090122836103102482
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SM sunny madra@sundeep5 years of work in 2 weeks... https://twitter.com/WesRoth/status/2090053670876434917
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GB Greg Brockman@gdbCodex for code migrations — from literal years to weeks: https://twitter.com/OpenAIDevs/status/2090122836103102482
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GO Gergely Orosz@GergelyOroszRofl that both OpenAI and Asana management believed that it would take FIVE years to migrate Enzyme to React Testing Library. What amusing BS! I imagine it went like this: Manager: “How long will it take? Give me SOMETHING” Dev (annoyed): “FIVE YEARS OK?? Now leave me alone.”…
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CH Chubby♨️@kimmonismusCrazy: A migration Asana's own engineers had scoped at five years took OpenAI's Codex agents about a week and a half. The job was ripping out Enzyme, an obsolete React testing framework that blocked every attempt to upgrade the company's frontend and that nobody had been…
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