/**
 * Shared terminal theme primitives for legacy and Codex-style TUI rendering.
 */
/**
 * Resolve whether ANSI color output is permitted, honouring the widely
 * supported `NO_COLOR` (https://no-color.org) and `FORCE_COLOR`
 * conventions before falling back to TTY detection.
 *
 * Precedence:
 *   1. `NO_COLOR` — if set to any non-empty value, colors are disabled.
 *      An empty string is treated as "not set" (matches the spec).
 *   2. `FORCE_COLOR` — if set to any value other than `"0"` / `"false"`,
 *      colors are forced on even without a TTY. `"0"` or `"false"`
 *      forces colors OFF regardless of TTY.
 *   3. Fallback: enable colors when the stream is a TTY.
 *
 * The helper takes its dependencies as parameters so it is trivially
 * testable and can be reused from non-process contexts.
 */
export declare function shouldUseColor(stdout?: {
    isTTY?: boolean;
}, env?: NodeJS.ProcessEnv): boolean;
export type UiColorProfile = "ansi16" | "ansi256" | "truecolor";
export type UiGlyphMode = "ascii" | "unicode" | "auto";
export interface UiGlyphSet {
    selected: string;
    unselected: string;
    bullet: string;
    check: string;
    cross: string;
}
export interface UiThemeColors {
    reset: string;
    dim: string;
    muted: string;
    heading: string;
    accent: string;
    success: string;
    warning: string;
    danger: string;
    border: string;
}
export interface UiTheme {
    profile: UiColorProfile;
    glyphMode: UiGlyphMode;
    glyphs: UiGlyphSet;
    colors: UiThemeColors;
}
export declare function createUiTheme(options?: {
    profile?: UiColorProfile;
    glyphMode?: UiGlyphMode;
}): UiTheme;
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