/**
 * [WHO]: Provides Theme, ThemeColor, ThemeBg, ColorMode — the structural theme contract
 * [FROM]: No dependencies — pure type vocabulary owned by core
 * [TO]: Consumed by core/export-html, core/extensions-host (ToolDefinition render hooks),
 *       core/runtime (export bridge); the concrete `class Theme` in modes/interactive/theme
 *       implements it. Resolves U2 (core must not import the modes/ UI layer for a type).
 * [HERE]: core/theme-contract.ts - theme type seam (U2); the modes Theme class is its implementation
 *
 * Pure type-only module: lets core reference a theme's rendering surface without depending on
 * the modes/interactive theme subsystem (which imports host config + does fs theme discovery).
 */
export type ThemeColor = "accent" | "border" | "borderAccent" | "borderMuted" | "success" | "error" | "warning" | "muted" | "dim" | "text" | "thinkingText" | "userMessageText" | "customMessageText" | "customMessageLabel" | "toolTitle" | "toolOutput" | "mdHeading" | "mdLink" | "mdLinkUrl" | "mdCode" | "mdCodeBlock" | "mdCodeBlockBorder" | "mdQuote" | "mdQuoteBorder" | "mdHr" | "mdListBullet" | "toolDiffAdded" | "toolDiffRemoved" | "toolDiffContext" | "syntaxComment" | "syntaxKeyword" | "syntaxFunction" | "syntaxVariable" | "syntaxString" | "syntaxNumber" | "syntaxType" | "syntaxOperator" | "syntaxPunctuation" | "thinkingOff" | "thinkingMinimal" | "thinkingLow" | "thinkingMedium" | "thinkingHigh" | "thinkingXhigh" | "bashMode";
export type ThemeBg = "selectedBg" | "userMessageBg" | "customMessageBg" | "toolPendingBg" | "toolSuccessBg" | "toolErrorBg";
export type ColorMode = "truecolor" | "256color";
export type ThinkingBorderLevel = "off" | "minimal" | "low" | "medium" | "high" | "xhigh";
/** A theme's rendering surface — what core needs to colorize text and render tool output. */
export interface Theme {
    readonly name?: string;
    readonly sourcePath?: string;
    fg(color: ThemeColor, text: string): string;
    bg(color: ThemeBg, text: string): string;
    bold(text: string): string;
    italic(text: string): string;
    underline(text: string): string;
    inverse(text: string): string;
    strikethrough(text: string): string;
    getFgAnsi(color: ThemeColor): string;
    getBgAnsi(color: ThemeBg): string;
    getColorMode(): ColorMode;
    getThinkingBorderColor(level: ThinkingBorderLevel): (str: string) => string;
    getBashModeBorderColor(): (str: string) => string;
}