Codex CLI version 0.157.0 installs a persistent background daemon by default when launched, and no official setting disables it. The daemon checks for updates once five minutes after startup and then hourly, and restarts the backend on new releases.
At OpenAI DevDay 2026 on September 29, OpenAI announced a major revamp of Codex CLI alongside a new cloud environment called Codex Cloud. The CLI gained scrollable history past the terminal limit, a fixed composer, the /agents, /fork, and /voice commands, activity analysis, and new themes. Codex Cloud reads GitHub, builds an environment, and gives each task its own virtual machine that keeps running when the developer's computer is asleep.
Two weeks later, the conversation shifted from features to what the tool does after the window closes. Starting with version 0.157.0, the daemon_auto_start feature is enabled by default. Launching the CLI installs a platform package of about 374MB and starts a persistent background daemon that survives the CLI window closing. The daemon checks for updates once five minutes after startup and then hourly, and restarts the backend on new releases.
No official setting disables the daemon. The two stories together trace a move away from the session: first cloud tasks that persist when the machine is offline, then a local daemon that persists when the CLI is closed. The revamp and the default daemon are separate announcements, and nothing in the stories links them as cause and effect.
Synthesized by Yomimono from the cited Yomimono stories below, each itself sourced, then editorially reviewed. Every fact links the story it came from.
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Starting with version 0.157.0 of the AI Codex CLI, the daemon_auto_start feature is enabled by default. Launching the CLI installs a platform package of about 374MB and starts a persistent background daemon that survives the CLI window closing, checks for updates once five minutes after startup and then hourly, and restarts the backend on new releases. No official setting disables it.
At OpenAI DevDay 2026 on September 29, OpenAI announced a major revamp of Codex CLI and a new cloud environment called Codex Cloud. The CLI adds scrollable history past the terminal limit, a fixed composer, the /agents, /fork, and /voice commands, activity analysis, and new themes. Codex Cloud reads GitHub, builds an environment, and gives each task its own virtual machine that keeps running when the developer's computer is asleep.