approval

Get the glyph set for the current charset mode.

Check whether the terminal is in ASCII charset mode.

Convenience wrapper so widgets can branch on charset without importing both _detect_charset_mode and CharsetMode.

Check a URL for suspicious Unicode and domain spoofing patterns.

Detect deceptive or hidden Unicode code points in text.

Join safety warnings into a display string with overflow indicator.

Flatten nested dict/list structures into key-path/string pairs.

Return whether a key path suggests URL-like content.

Render hidden Unicode characters as explicit markers.

Example output: abc<U+202E RIGHT-TO-LEFT OVERRIDE>def.

Remove known dangerous/invisible Unicode characters from text.

Summarize Unicode issues for warning messages.

Deduplicates by code point. When more than max_items unique entries exist, the summary is truncated with a +N more entries suffix.

Get the renderer for a tool by name.

Approval menu using standard Textual patterns.

Key design decisions (following mistral-vibe reference):

• Container base class with compose()
• BINDINGS for key handling (not on_key)
• can_focus_children = False to prevent focus theft
• Simple Static widgets for options
• Standard message posting
• Tool-specific widgets via renderer pattern

LangChain brand colors and semantic constants for the app.

Single source of truth for color values used in Python code (Rich markup, Content.styled, Content.from_markup). CSS-side styling should reference Textual CSS variables: built-in variables ($primary, $background, $text-muted, $error-muted, etc.) are set via register_theme() in DeepAgentsApp.__init__, while the few app-specific variables ($mode-bash, $mode-command, $mode-incognito, $skill, $skill-hover, $tool, $tool-hover) are backed by these constants via App.get_theme_variable_defaults().

Code that needs custom CSS variable values should call get_css_variable_defaults(dark=...). For the full semantic color palette, look up the ThemeColors instance via get_registry().

Users can define custom themes in ~/.deepagents/config.toml under [themes.<name>] sections. Each new theme section must include label (str); dark (bool) defaults to False if omitted (set to True for dark themes). Color fields are optional and fall back to the built-in dark/light palette based on the dark flag. Sections whose name matches a built-in theme override its colors without replacing it. See _load_user_themes() for details.