mirror of
https://github.com/NousResearch/hermes-agent.git
synced 2026-05-21 03:39:54 +00:00
Brooklyn Nicholson
f8745f59c2
Two long-standing prompt_toolkit bugs in the base hermes CLI: 1. Resize duplication. Column-shrink resize used to push 40+ rows of duplicate chrome (status bar, input rules) into terminal scrollback every resize. Same wall as pt issues #29 (open since 2014), #1675, #1933 — aider/xonsh/ipython all use alt-screen to dodge it. Root cause (verified by reading prompt_toolkit/renderer.py): _output_screen_diff (renderer.py L232-242) deliberately moves the cursor to the bottom of the canvas after every paint 'to make sure the terminal scrolls up'. In non-fullscreen mode this scrolls chrome content into terminal scrollback on every render — not just on resize. Fix: monkey-patch prompt_toolkit.renderer._output_screen_diff to bypass the reserve-vertical-space cursor move. When pt's logic checks 'if current_height > previous_screen.height', we inflate the previous screen height so the branch falls through. ~30-line wrapper, no fork of pt, no alt-screen, no DECSTBM scroll region. Verified empirically in real Terminal.app: 10 resizes (mixed shrinks/widens 1300→500→1400) during streaming produced ZERO scrollback delta, full agent response preserved, status bar pinned at bottom, no visible duplicates. pt is pinned to ==3.0.52 so the private-function patch is safe; future pt bumps will need to re-verify the signature matches. 2. Light-mode terminal visibility. Hardcoded skin colors (#FFF8DC cornsilk, #FFD700 gold, #B8860B dark goldenrod) are tuned for dark Terminal.app — invisible on light/cream backgrounds. Port ui-tui/src/theme.ts detectLightMode() to Python so the base CLI adapts. Detection priority: HERMES_LIGHT/HERMES_TUI_LIGHT env → HERMES_TUI_THEME=light|dark → HERMES_TUI_BACKGROUND=#RRGGBB → COLORFGBG env (xterm/Konsole/urxvt) → OSC 11 query (\x1b]11;?\x1b\\) with 100ms timeout → default dark. OSC 11 is tty-gated so gateway/cron/batch/subagent code paths don't pay the timeout cost. When light mode is detected, dark-mode colors auto-remap to readable equivalents (#FFF8DC → #1A1A1A, #FFD700 → #9A6B00, etc). Hooked at three points: - _hex_to_ansi() — auto-remaps any color emitted via the ANSI helper - _build_tui_style_dict() — rewrites pt style strings (chrome bg/fg) - SkinConfig.get_color() — wrapped at module load so Rich Panel borders/body text get the remap too Status-bar foreground colors (#C0C0C0, #888888, etc.) are explicitly skipped because they're paired with a dark navy bg — remapping them would make them invisible in dark mode. 3. Other visibility fixes: [thinking] reasoning preview now uses ANSI dim+italic (\x1b[2;3m) instead of #B8860B so it inherits terminal default fg color. Input/prompt area defaults to terminal default fg (was #FFF8DC cornsilk → invisible on cream). Co-authored-by: Brooklyn Nicholson <brooklyn.bb.nicholson@gmail.com>