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Total line count
Tests whether the terminal can report the total number of lines in the buffer (visible + scrollback). This is used by testing frameworks and terminal introspection tools to verify scrollback behavior.
How this is tested: Write 30 lines, verify total line count is at least 30.
Analysis2026-03-26
Supported by all 8 tested terminals — universal adoption. Part of the Core TUI baseline.
Supported by 13 of 13 backends (100%)
Terminal Applications
| Terminal | Version | Support | Notes |
|---|---|---|---|
| iTerm2 | 3.6.9 | ✓ yes | Content written to scrollback |
| Ghostty | 1.3.1 | ✓ yes | Content written to scrollback |
| VS Code | 1.112.0 | ✓ yes | Content written to scrollback |
| Warp | 0.2026.03.18.08.24.03 | ✓ yes | Content written to scrollback |
| Cursor | 2.6.21 | ✓ yes | Content written to scrollback |
| tmux | 3.6a | ✓ yes | Content written to scrollback |
| Kitty | 0.46.2 | ✓ yes | Content written to scrollback |
| Terminal.app | 2.15 | ✓ yes | Content written to scrollback |
| GNU Screen | 5.0.1 | ✓ yes | Content written to scrollback |