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Soft reset (DECSTR)
ESC [ ! pDECSTR (Soft Terminal Reset) resets terminal modes and attributes without clearing the screen. The sequence is
ESC [ ! p. Unlike RIS (full reset), DECSTR does not clear the display, scrollback, or cursor position. It resets modes (auto-wrap, origin, insert), SGR attributes, character sets, and scroll regions.How this is testedautomated
Enable app cursor mode (
Enable app cursor mode (
\x1b[?1h), write text, send \x1b[!p (DECSTR), verify applicationCursor mode is off.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 11 of 12 terminals (92%). Not supported by: vt100.js. Part of the Core TUI baseline. Notes: vt100.js: DECSTR (soft reset) not implemented in vt100.js baseline emulator.
Supported by 10 of 14 backends (71%)
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 |
Headless Backends
Parser correctness only — a ✓ means the parser accepts the sequence.
| Backend | Version | Support | Notes |
|---|---|---|---|
| vterm | 0.2.0 | ✓ yes | |
| xterm.js | 5.5.0 | ✓ yes | |
| Alacritty | 0.26.0 | ~ partial | DECSTR resets modes but headless probe reads stale state |
| Kitty | 0.40.0 | ~ partial | DECSTR resets modes but headless probe reads stale state |
| WezTerm | 0.1.0-fork.5 | ~ partial | DECSTR resets modes but headless probe reads stale state |
| vt100.js | 0.2.1 | ✗ no | DECSTR (soft reset) not implemented in vt100.js baseline emulator |