fix(tui): proactive mouse disable on ConPTY + /mouse toggle command#15488
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On Windows WSL2, ConPTY implicitly enables mouse event injection when the alternate screen buffer (DEC 1049) is entered, causing raw escape sequences to appear in the transcript as ghost characters. Fix (two parts): 1. ConPTY fix: send DISABLE_MOUSE_TRACKING immediately after entering alt screen when mouse tracking is off (AlternateScreen.tsx) 2. Runtime toggle: add /mouse [on|off|toggle] slash command with config persistence (display.tui_mouse) so users can manage this at runtime The env var HERMES_TUI_DISABLE_MOUSE continues to work as the initial default, but can now be overridden via /mouse and persisted to config. Closes: upstream ConPTY mouse injection issue Credits: OutThisLife / PR NousResearch#13716 for the toggle concept
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fix(tui): proactive mouse disable on ConPTY + /mouse toggle command
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fix(tui): proactive mouse disable on ConPTY + /mouse toggle command
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fix(tui): proactive mouse disable on ConPTY + /mouse toggle command
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fix(tui): proactive mouse disable on ConPTY + /mouse toggle command
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fix(tui): proactive mouse disable on ConPTY + /mouse toggle command
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Problem
On Windows WSL2, moving the mouse or using the scroll wheel while the Hermes TUI is active injects raw escape sequences (e.g.
<35;col;row M>) into the chat transcript as ghost characters. This is reproducible in any terminal that uses ConPTY for WSL2 (Windows Terminal, Termius, etc.).Root Cause
ConPTY implicitly enables mouse event injection when the alternate screen buffer (DEC 1049) is entered, even without explicit
?1000h/?1003hDECSET codes. The TUI enters alt screen on startup; the classic CLI does not.The
HERMES_TUI_DISABLE_MOUSEenv var correctly prevents Hermes from sending mouse enable sequences, but since ConPTY's implicit enable is never explicitly countered, the injection still occurs.Fix
Two parts:
ConPTY fix — Proactively send
DISABLE_MOUSE_TRACKINGafter entering the alternate screen when mouse tracking is off (AlternateScreen.tsx). This cancels ConPTY's implicit enable immediately.Runtime toggle — Add
/mouse [on|off|toggle]slash command with config persistence (display.tui_mouse). The env varHERMES_TUI_DISABLE_MOUSEcontinues to work as the initial default but can now be overridden at runtime. Config persistence means the setting survives restarts.Runtime Ink API — Added
setAltScreenMouseTracking(enabled)to the Ink instance so the toggle can update the terminal immediately mid-session (not just on next alt screen entry).Files Changed
ui-tui/packages/hermes-ink/src/ink/components/AlternateScreen.tsxui-tui/packages/hermes-ink/src/ink/ink.tsxui-tui/src/app/slash/commands/core.tsui-tui/src/app/interfaces.tsui-tui/src/app/uiStore.tsui-tui/src/app/useConfigSync.tsui-tui/src/app.tsxui-tui/src/gatewayTypes.tstui_gateway/server.pyCredits
Concept inspired by @OutThisLife's PR #13716 which addressed the same root issue.