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Window title (OSC 2)
ESC ] 2 ; title BELOSC 2 sets the terminal window title. The sequence is
ESC ] 2 ; title ST where ST is the string terminator (ESC \ or BEL). Used by shells to display the current directory or running command in the window title bar or tab header.How this is testedautomated
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Send
\x1b]2;Test Title\x07 (OSC 2), verify getTitle() contains "Test Title".The same probe runs against headless backends (via Termless) and real terminal apps (via a daemon launched in each terminal). This lets us distinguish parser correctness from rendering correctness.
Analysis2026-04-06
Supported by all 12 tested terminals — universal adoption. Part of the Modern TUI baseline.
Supported by 13 of 14 backends (93%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | |
| Ghostty | 1.3.1 | ✓ yes | |
| VS Code | ✓ yes | ||
| Warp | ✓ yes | ||
| Cursor | ✓ yes | ||
| Terminal.app | ✓ yes |