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Icon name (OSC 1)
Category: extensions · Tags: Operating System Commands (OSC), Xterm Extensions · Specification ↗
ESC ] 1 ; Pt BELOSC 1 sets the icon name (without changing the window title). The sequence is
ESC ] 1 ; Pt BEL where Pt is the icon name string. This is the companion to OSC 0 (which sets both icon name and title) and OSC 2 (which sets only the title). Originally used by X11 window managers to label minimized windows, icon name is less commonly used in modern terminals but remains part of the xterm protocol. Some terminals treat OSC 1 identically to OSC 0 or ignore the icon name entirely.How this is tested: Send
\x1b]1;test-icon\x07 and verify the terminal remains responsive (icon name accepted without error).Supported by 5 of 14 backends (36%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ? unknown | |
| Ghostty | 1.3.1 | ? unknown | |
| Kitty | 0.46.2 | ? unknown | |
| VS Code | 1.113.0 | ? unknown | |
| Warp | 0.2026.03.18.08.24.03 | ? unknown | |
| Cursor | 2.6.21 | ? unknown | |
| Terminal.app | 2.15 | ? unknown |