import type { VerbosityLevel } from "./verbosity.js";
/**
 * Quiet always wins over diagnostic verbosity so mixed flag combinations
 * cannot leak verbose diagnostics.
 */
export declare const resolveVerbosityFromArgv: (argv: ReadonlyArray<string>) => VerbosityLevel;
/**
 * Whether a diagnostic environment request is enabled. Only the exact values
 * `1` and `true` enable one; every other value, including `TRUE`, `yes`, `0`
 * and the empty string, leaves the request off.
 */
export declare const isEnabledEnvRequest: (value: string | undefined) => boolean;
/** The diagnostic detail a run asks for, across flags and the environment. */
export interface DiagnosticRequest {
    readonly flagQuiet: boolean;
    readonly flagDebug: boolean;
    readonly flagVerbose: boolean;
    readonly envDebug: boolean;
    readonly envVerbose: boolean;
}
/**
 * The detail level a diagnostic request selects: quiet before debug before
 * verbose before ordinary detail, with a flag and its environment request
 * carrying the same weight.
 */
export declare const resolveVerbosityLevel: (request: DiagnosticRequest) => VerbosityLevel;
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