/** Native PowerShell cold starts can cross five seconds under loaded Windows/WSL hosts. */
export declare const POWERSHELL_STARTUP_PROBE_TIMEOUT_MS = 15000;
export declare const POWERSHELL_ARGS: readonly ["-NoLogo", "-NoProfile", "-NonInteractive", "-Command"];
export declare const POWERSHELL_7_GUARD = "if ($PSVersionTable.PSVersion.Major -lt 7) { throw 'Pi requires PowerShell 7 or newer.' }\n";
export declare const POWERSHELL_SESSION_READY_MARKER = "\u001Epi-shell-ready\u001E";
export declare const POWERSHELL_SESSION_STDERR_READY_MARKER = "\u001Epi-shell-stderr-ready\u001E\n";
export declare const POWERSHELL_STDERR_BARRIER_LABEL = "stderr";
/** Deterministic process-only settings for Pi's non-interactive PowerShell host. */
export declare function createPowerShellHostEnvironment(environment: NodeJS.ProcessEnv): NodeJS.ProcessEnv;
/**
 * PowerShell 7 persistent REPL bootstrap. The stdout/stderr readiness markers let the process that
 * actually serves commands double as its own availability probe and prime both pipes. Command I/O
 * encoding remains owned by PowerShell and the invoked program; only Pi's base64 wire is UTF-8.
 */
export declare const POWERSHELL_BOOTSTRAP: string;
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