Linear reworks CI as coding agents make validation the expensive part

Tuomas Artman's team cut runner time per test roughly in half while Linear's test suite nearly quadrupled in 2026, according to Linear.

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Primary source: Linear

Why it matters

AI coding increases output before verification capacity catches up. Linear's overhaul shows CI architecture, runner economics and test isolation becoming core constraints for agent-heavy engineering teams.

A software engineer works at a modern standing desk, reviewing code and continuous integration test results on a sleek monitor.

Linear, the product-development software company, said on September 21st that a CI overhaul ordered by co-founder and CTO Tuomas Artman (@artman) cut runner time per test roughly in half even as its test suite nearly quadrupled during 2026. Pull request wait time fell from more than six minutes to just over five minutes.…

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