mirror of
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feat(cli): skin-aware light/dark theme mode with terminal auto-detection
Add display.theme_mode setting (auto/light/dark) that makes the CLI readable on light terminal backgrounds. - Auto-detect terminal background via COLORFGBG, OSC 11, and macOS appearance (fallback chain in hermes_cli/colors.py) - Add colors_light overrides to all 7 built-in skins with dark/readable colors for light backgrounds - SkinConfig.get_color() now returns light overrides when theme is light - get_prompt_toolkit_style_overrides() uses light bg colors for completion menus in light mode - init_skin_from_config() reads display.theme_mode from config - 7 new tests covering theme mode resolution, detection fallbacks, and light-mode skin overrides Salvaged from PR #1187 by @peteromallet. Core design preserved; adapted to current main (kept all existing helpers, tool_emojis, convenience functions that were added after the PR branched). Co-authored-by: Peter O'Mallet <peteromallet@users.noreply.github.com>
This commit is contained in:
teknium1
parent
d156942419
commit
a1c81360a5
5 changed files with 362 additions and 6 deletions
1
cli.py
1
cli.py
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@ -214,6 +214,7 @@ def load_cli_config() -> Dict[str, Any]:
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"streaming": False,
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"show_cost": False,
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"skin": "default",
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"theme_mode": "auto",
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},
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"clarify": {
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"timeout": 120, # Seconds to wait for a clarify answer before auto-proceeding
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@ -1,5 +1,6 @@
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"""Shared ANSI color utilities for Hermes CLI modules."""
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import os
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import sys
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@ -20,3 +21,123 @@ def color(text: str, *codes) -> str:
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if not sys.stdout.isatty():
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return text
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return "".join(codes) + text + Colors.RESET
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# =============================================================================
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# Terminal background detection (light vs dark)
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# =============================================================================
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def _detect_via_colorfgbg() -> str:
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"""Check the COLORFGBG environment variable.
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Some terminals (rxvt, xterm, iTerm2) set COLORFGBG to ``<fg>;<bg>``
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where bg >= 8 usually means a dark background.
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Returns "light", "dark", or "unknown".
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"""
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val = os.environ.get("COLORFGBG", "")
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if not val:
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return "unknown"
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parts = val.split(";")
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try:
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bg = int(parts[-1])
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except (ValueError, IndexError):
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return "unknown"
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# Standard terminal colors 0-6 are dark, 7+ are light.
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# bg < 7 → dark background; bg >= 7 → light background.
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if bg >= 7:
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return "light"
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return "dark"
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def _detect_via_macos_appearance() -> str:
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"""Check macOS AppleInterfaceStyle via ``defaults read``.
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Returns "light", "dark", or "unknown".
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"""
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if sys.platform != "darwin":
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return "unknown"
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try:
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import subprocess
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result = subprocess.run(
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["defaults", "read", "-g", "AppleInterfaceStyle"],
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capture_output=True, text=True, timeout=2,
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)
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if result.returncode == 0 and "dark" in result.stdout.lower():
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return "dark"
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# If the key doesn't exist, macOS is in light mode.
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return "light"
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except Exception:
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return "unknown"
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def _detect_via_osc11() -> str:
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"""Query the terminal background colour via the OSC 11 escape sequence.
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Writes ``\\e]11;?\\a`` and reads the response to determine luminance.
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Only works when stdin/stdout are connected to a real TTY (not piped).
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Returns "light", "dark", or "unknown".
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"""
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if sys.platform == "win32":
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return "unknown"
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if not (sys.stdin.isatty() and sys.stdout.isatty()):
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return "unknown"
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try:
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import select
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import termios
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import tty
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fd = sys.stdin.fileno()
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old_attrs = termios.tcgetattr(fd)
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try:
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tty.setraw(fd)
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# Send OSC 11 query
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sys.stdout.write("\x1b]11;?\x07")
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sys.stdout.flush()
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# Wait briefly for response
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if not select.select([fd], [], [], 0.1)[0]:
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return "unknown"
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response = b""
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while select.select([fd], [], [], 0.05)[0]:
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response += os.read(fd, 128)
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finally:
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termios.tcsetattr(fd, termios.TCSADRAIN, old_attrs)
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# Parse response: \x1b]11;rgb:RRRR/GGGG/BBBB\x07 (or \x1b\\)
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text = response.decode("latin-1", errors="replace")
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if "rgb:" not in text:
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return "unknown"
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rgb_part = text.split("rgb:")[-1].split("\x07")[0].split("\x1b")[0]
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channels = rgb_part.split("/")
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if len(channels) < 3:
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return "unknown"
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# Each channel is 2 or 4 hex digits; normalise to 0-255
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vals = []
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for ch in channels[:3]:
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ch = ch.strip()
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if len(ch) <= 2:
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vals.append(int(ch, 16))
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else:
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vals.append(int(ch[:2], 16)) # take high byte
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# Perceived luminance (ITU-R BT.601)
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luminance = 0.299 * vals[0] + 0.587 * vals[1] + 0.114 * vals[2]
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return "light" if luminance > 128 else "dark"
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except Exception:
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return "unknown"
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def detect_terminal_background() -> str:
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"""Detect whether the terminal has a light or dark background.
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Tries three strategies in order:
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1. COLORFGBG environment variable
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2. macOS appearance setting
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3. OSC 11 escape sequence query
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Returns "light", "dark", or "unknown" if detection fails.
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"""
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for detector in (_detect_via_colorfgbg, _detect_via_macos_appearance, _detect_via_osc11):
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result = detector()
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if result != "unknown":
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return result
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return "unknown"
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@ -233,6 +233,7 @@ DEFAULT_CONFIG = {
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"streaming": False,
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"show_cost": False, # Show $ cost in the status bar (off by default)
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"skin": "default",
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"theme_mode": "auto",
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},
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# Privacy settings
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@ -114,6 +114,7 @@ class SkinConfig:
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name: str
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description: str = ""
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colors: Dict[str, str] = field(default_factory=dict)
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colors_light: Dict[str, str] = field(default_factory=dict)
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spinner: Dict[str, Any] = field(default_factory=dict)
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branding: Dict[str, str] = field(default_factory=dict)
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tool_prefix: str = "┊"
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@ -122,7 +123,12 @@ class SkinConfig:
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banner_hero: str = "" # Rich-markup hero art (replaces HERMES_CADUCEUS)
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def get_color(self, key: str, fallback: str = "") -> str:
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"""Get a color value with fallback."""
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"""Get a color value with fallback.
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In light theme mode, returns the light override if available.
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"""
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if get_theme_mode() == "light" and key in self.colors_light:
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return self.colors_light[key]
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return self.colors.get(key, fallback)
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def get_spinner_list(self, key: str) -> List[str]:
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@ -168,6 +174,21 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#DAA520",
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"session_border": "#8B8682",
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},
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"colors_light": {
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"banner_border": "#7A5A00",
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"banner_title": "#6B4C00",
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"banner_accent": "#7A5500",
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"banner_dim": "#8B7355",
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"banner_text": "#3D2B00",
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"prompt": "#3D2B00",
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"ui_accent": "#7A5500",
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"ui_label": "#01579B",
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"ui_ok": "#1B5E20",
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"input_rule": "#7A5A00",
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"response_border": "#6B4C00",
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"session_label": "#5C4300",
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"session_border": "#8B7355",
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},
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"spinner": {
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# Empty = use hardcoded defaults in display.py
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},
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@ -201,6 +222,21 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#C7A96B",
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"session_border": "#6E584B",
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},
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"colors_light": {
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"banner_border": "#6B1010",
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"banner_title": "#5C4300",
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"banner_accent": "#8B1A1A",
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"banner_dim": "#5C4030",
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"banner_text": "#3A1800",
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"prompt": "#3A1800",
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"ui_accent": "#8B1A1A",
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"ui_label": "#5C4300",
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"ui_ok": "#1B5E20",
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"input_rule": "#6B1010",
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"response_border": "#7A1515",
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"session_label": "#5C4300",
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"session_border": "#5C4A3A",
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},
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"spinner": {
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"waiting_faces": ["(⚔)", "(⛨)", "(▲)", "(<>)", "(/)"],
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"thinking_faces": ["(⚔)", "(⛨)", "(▲)", "(⌁)", "(<>)"],
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@ -265,6 +301,22 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#888888",
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"session_border": "#555555",
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},
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"colors_light": {
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"banner_border": "#333333",
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"banner_title": "#222222",
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"banner_accent": "#333333",
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"banner_dim": "#555555",
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"banner_text": "#333333",
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"prompt": "#222222",
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"ui_accent": "#333333",
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"ui_label": "#444444",
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"ui_ok": "#444444",
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"ui_error": "#333333",
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"input_rule": "#333333",
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"response_border": "#444444",
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"session_label": "#444444",
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"session_border": "#666666",
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},
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"spinner": {},
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"branding": {
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"agent_name": "Hermes Agent",
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@ -296,6 +348,21 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#7eb8f6",
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"session_border": "#4b5563",
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},
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"colors_light": {
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"banner_border": "#1A3A7A",
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"banner_title": "#1A3570",
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"banner_accent": "#1E4090",
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"banner_dim": "#3B4555",
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"banner_text": "#1A2A50",
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"prompt": "#1A2A50",
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"ui_accent": "#1A3570",
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"ui_label": "#1E3A80",
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"ui_ok": "#1B5E20",
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"input_rule": "#1A3A7A",
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"response_border": "#2A4FA0",
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"session_label": "#1A3570",
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"session_border": "#5A6070",
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},
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"spinner": {},
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"branding": {
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"agent_name": "Hermes Agent",
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@ -327,6 +394,21 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#A9DFFF",
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"session_border": "#496884",
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},
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"colors_light": {
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"banner_border": "#0D3060",
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"banner_title": "#0D3060",
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"banner_accent": "#154080",
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"banner_dim": "#2A4565",
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"banner_text": "#0A2850",
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"prompt": "#0A2850",
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"ui_accent": "#0D3060",
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"ui_label": "#0D3060",
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"ui_ok": "#1B5E20",
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"input_rule": "#0D3060",
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"response_border": "#1A5090",
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"session_label": "#0D3060",
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"session_border": "#3A5575",
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},
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"spinner": {
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"waiting_faces": ["(≈)", "(Ψ)", "(∿)", "(◌)", "(◠)"],
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"thinking_faces": ["(Ψ)", "(∿)", "(≈)", "(⌁)", "(◌)"],
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@ -391,6 +473,23 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#919191",
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"session_border": "#656565",
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},
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"colors_light": {
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"banner_border": "#666666",
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"banner_title": "#222222",
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"banner_accent": "#333333",
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"banner_dim": "#555555",
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"banner_text": "#333333",
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"prompt": "#222222",
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"ui_accent": "#333333",
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"ui_label": "#444444",
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"ui_ok": "#444444",
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"ui_error": "#333333",
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"ui_warn": "#444444",
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"input_rule": "#666666",
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"response_border": "#555555",
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"session_label": "#444444",
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"session_border": "#777777",
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},
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"spinner": {
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"waiting_faces": ["(◉)", "(◌)", "(◬)", "(⬤)", "(::)"],
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"thinking_faces": ["(◉)", "(◬)", "(◌)", "(○)", "(●)"],
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@ -456,6 +555,21 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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"session_label": "#FFD39A",
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"session_border": "#6C4724",
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},
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"colors_light": {
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"banner_border": "#7A3511",
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"banner_title": "#5C2D00",
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"banner_accent": "#8B4000",
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"banner_dim": "#5A3A1A",
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"banner_text": "#3A1E00",
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"prompt": "#3A1E00",
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"ui_accent": "#8B4000",
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"ui_label": "#5C2D00",
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"ui_ok": "#1B5E20",
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"input_rule": "#7A3511",
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"response_border": "#8B4513",
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"session_label": "#5C2D00",
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"session_border": "#6B5540",
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},
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"spinner": {
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"waiting_faces": ["(✦)", "(▲)", "(◇)", "(<>)", "(🔥)"],
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"thinking_faces": ["(✦)", "(▲)", "(◇)", "(⌁)", "(🔥)"],
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@ -509,6 +623,8 @@ _BUILTIN_SKINS: Dict[str, Dict[str, Any]] = {
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_active_skin: Optional[SkinConfig] = None
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_active_skin_name: str = "default"
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_theme_mode: str = "auto"
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_resolved_theme_mode: Optional[str] = None
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def _skins_dir() -> Path:
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@ -536,6 +652,8 @@ def _build_skin_config(data: Dict[str, Any]) -> SkinConfig:
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default = _BUILTIN_SKINS["default"]
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colors = dict(default.get("colors", {}))
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colors.update(data.get("colors", {}))
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colors_light = dict(default.get("colors_light", {}))
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colors_light.update(data.get("colors_light", {}))
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spinner = dict(default.get("spinner", {}))
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spinner.update(data.get("spinner", {}))
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branding = dict(default.get("branding", {}))
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@ -545,6 +663,7 @@ def _build_skin_config(data: Dict[str, Any]) -> SkinConfig:
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name=data.get("name", "unknown"),
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description=data.get("description", ""),
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colors=colors,
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colors_light=colors_light,
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spinner=spinner,
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branding=branding,
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tool_prefix=data.get("tool_prefix", default.get("tool_prefix", "┊")),
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@ -625,6 +744,39 @@ def get_active_skin_name() -> str:
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return _active_skin_name
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def get_theme_mode() -> str:
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"""Return the resolved theme mode: "light" or "dark".
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When ``_theme_mode`` is ``"auto"``, detection is attempted once and cached.
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If detection returns ``"unknown"``, defaults to ``"dark"``.
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"""
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global _resolved_theme_mode
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if _theme_mode in ("light", "dark"):
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return _theme_mode
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# Auto mode — detect and cache
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if _resolved_theme_mode is None:
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try:
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from hermes_cli.colors import detect_terminal_background
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detected = detect_terminal_background()
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except Exception:
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detected = "unknown"
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_resolved_theme_mode = detected if detected in ("light", "dark") else "dark"
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return _resolved_theme_mode
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def set_theme_mode(mode: str) -> None:
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"""Set the theme mode to "light", "dark", or "auto"."""
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global _theme_mode, _resolved_theme_mode
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_theme_mode = mode
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# Reset cached detection so it re-runs on next get_theme_mode() if auto
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_resolved_theme_mode = None
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def get_theme_mode_setting() -> str:
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"""Return the raw theme mode setting (may be "auto", "light", or "dark")."""
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return _theme_mode
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def init_skin_from_config(config: dict) -> None:
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"""Initialize the active skin from CLI config at startup.
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@ -637,6 +789,13 @@ def init_skin_from_config(config: dict) -> None:
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else:
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set_active_skin("default")
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# Theme mode
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theme_mode = display.get("theme_mode", "auto")
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if isinstance(theme_mode, str) and theme_mode.strip():
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set_theme_mode(theme_mode.strip())
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else:
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set_theme_mode("auto")
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# =============================================================================
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# Convenience helpers for CLI modules
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@ -690,6 +849,14 @@ def get_prompt_toolkit_style_overrides() -> Dict[str, str]:
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warn = skin.get_color("ui_warn", "#FF8C00")
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error = skin.get_color("ui_error", "#FF6B6B")
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||||
# Use lighter background colours for completion menus in light mode
|
||||
if get_theme_mode() == "light":
|
||||
menu_bg = "bg:#e8e8e8"
|
||||
menu_sel_bg = "bg:#d0d0d0"
|
||||
else:
|
||||
menu_bg = "bg:#1a1a2e"
|
||||
menu_sel_bg = "bg:#333355"
|
||||
|
||||
return {
|
||||
"input-area": prompt,
|
||||
"placeholder": f"{dim} italic",
|
||||
|
|
@ -698,11 +865,11 @@ def get_prompt_toolkit_style_overrides() -> Dict[str, str]:
|
|||
"hint": f"{dim} italic",
|
||||
"input-rule": input_rule,
|
||||
"image-badge": f"{label} bold",
|
||||
"completion-menu": f"bg:#1a1a2e {text}",
|
||||
"completion-menu.completion": f"bg:#1a1a2e {text}",
|
||||
"completion-menu.completion.current": f"bg:#333355 {title}",
|
||||
"completion-menu.meta.completion": f"bg:#1a1a2e {dim}",
|
||||
"completion-menu.meta.completion.current": f"bg:#333355 {label}",
|
||||
"completion-menu": f"{menu_bg} {text}",
|
||||
"completion-menu.completion": f"{menu_bg} {text}",
|
||||
"completion-menu.completion.current": f"{menu_sel_bg} {title}",
|
||||
"completion-menu.meta.completion": f"{menu_bg} {dim}",
|
||||
"completion-menu.meta.completion.current": f"{menu_sel_bg} {label}",
|
||||
"clarify-border": input_rule,
|
||||
"clarify-title": f"{title} bold",
|
||||
"clarify-question": f"{text} bold",
|
||||
|
|
|
|||
|
|
@ -13,9 +13,13 @@ def reset_skin_state():
|
|||
from hermes_cli import skin_engine
|
||||
skin_engine._active_skin = None
|
||||
skin_engine._active_skin_name = "default"
|
||||
skin_engine._theme_mode = "auto"
|
||||
skin_engine._resolved_theme_mode = None
|
||||
yield
|
||||
skin_engine._active_skin = None
|
||||
skin_engine._active_skin_name = "default"
|
||||
skin_engine._theme_mode = "auto"
|
||||
skin_engine._resolved_theme_mode = None
|
||||
|
||||
|
||||
class TestSkinConfig:
|
||||
|
|
@ -312,3 +316,65 @@ class TestCliBrandingHelpers:
|
|||
assert overrides["clarify-title"] == f"{skin.get_color('banner_title')} bold"
|
||||
assert overrides["sudo-prompt"] == f"{skin.get_color('ui_error')} bold"
|
||||
assert overrides["approval-title"] == f"{skin.get_color('ui_warn')} bold"
|
||||
|
||||
|
||||
class TestThemeMode:
|
||||
def test_get_theme_mode_defaults_to_dark_on_unknown(self):
|
||||
from hermes_cli.skin_engine import get_theme_mode, set_theme_mode
|
||||
|
||||
set_theme_mode("auto")
|
||||
# In a test env, detection returns "unknown" → defaults to "dark"
|
||||
with patch("hermes_cli.colors.detect_terminal_background", return_value="unknown"):
|
||||
from hermes_cli import skin_engine
|
||||
skin_engine._resolved_theme_mode = None # force re-detection
|
||||
assert get_theme_mode() == "dark"
|
||||
|
||||
def test_set_theme_mode_light(self):
|
||||
from hermes_cli.skin_engine import get_theme_mode, set_theme_mode
|
||||
|
||||
set_theme_mode("light")
|
||||
assert get_theme_mode() == "light"
|
||||
|
||||
def test_set_theme_mode_dark(self):
|
||||
from hermes_cli.skin_engine import get_theme_mode, set_theme_mode
|
||||
|
||||
set_theme_mode("dark")
|
||||
assert get_theme_mode() == "dark"
|
||||
|
||||
def test_get_color_respects_light_mode(self):
|
||||
from hermes_cli.skin_engine import SkinConfig, set_theme_mode
|
||||
|
||||
skin = SkinConfig(
|
||||
name="test",
|
||||
colors={"banner_title": "#FFD700", "prompt": "#FFF8DC"},
|
||||
colors_light={"banner_title": "#6B4C00"},
|
||||
)
|
||||
set_theme_mode("light")
|
||||
assert skin.get_color("banner_title") == "#6B4C00"
|
||||
# Key not in colors_light falls back to colors
|
||||
assert skin.get_color("prompt") == "#FFF8DC"
|
||||
|
||||
def test_get_color_falls_back_in_dark_mode(self):
|
||||
from hermes_cli.skin_engine import SkinConfig, set_theme_mode
|
||||
|
||||
skin = SkinConfig(
|
||||
name="test",
|
||||
colors={"banner_title": "#FFD700", "prompt": "#FFF8DC"},
|
||||
colors_light={"banner_title": "#6B4C00"},
|
||||
)
|
||||
set_theme_mode("dark")
|
||||
assert skin.get_color("banner_title") == "#FFD700"
|
||||
assert skin.get_color("prompt") == "#FFF8DC"
|
||||
|
||||
def test_init_skin_from_config_reads_theme_mode(self):
|
||||
from hermes_cli.skin_engine import init_skin_from_config, get_theme_mode_setting
|
||||
|
||||
init_skin_from_config({"display": {"skin": "default", "theme_mode": "light"}})
|
||||
assert get_theme_mode_setting() == "light"
|
||||
|
||||
def test_builtin_skins_have_colors_light(self):
|
||||
from hermes_cli.skin_engine import _BUILTIN_SKINS, _build_skin_config
|
||||
|
||||
for name, data in _BUILTIN_SKINS.items():
|
||||
skin = _build_skin_config(data)
|
||||
assert len(skin.colors_light) > 0, f"Skin '{name}' has empty colors_light"
|
||||
|
|
|
|||
Loading…
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Reference in a new issue