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OSC 7501 lets programs report status and wait states to terminals

mitchellh.com 6 min read Editor score 8/10

The proposed terminal protocol lets programs report states such as working, blocked on user input, finished or failed, with an optional message; the post discusses why existing approaches fall short for coding agents. A shared status channel could help terminals and agent tools surface actionable waits consistently.

What: OSC 7501 is a terminal escape-sequence protocol for programs to report idle, working, waiting, finished, or failed status and why.
How: Programs can send state and context such as an app name and message; terminals or other tools can present it as notifications, inboxes, or status icons.
Why it matters: A generic terminal-native status signal helps users track long-running work and agent requests without relying on screen-reading heuristics.

Programs send OSC 7501 status to a terminal, which can present it to the user. Sketched from the article's own text.

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