/**
 * src/lanes/args.ts — isolated child argument construction for pi-subagents
 * lanes (v1 spawn-per-task).
 *
 * Ported from the ZOB harness `buildIsolatedChildArgs` (child-runner.ts
 * cr:43-56) and the child args sequence (cr:370-399). Pure module: zero
 * @earendil-works/* imports, zero child_process.
 */
export interface IsolatedChildArgsInput {
    providerExtension?: string;
    codexFastModeExtension?: string;
    childSafetyExtension?: string;
}
/**
 * Build the fixed isolated-args prefix: `--mode json -p --no-extensions`,
 * then `-e <ext>` once per deduplicated non-empty extension.
 */
export declare function buildIsolatedChildArgs(input?: IsolatedChildArgsInput): string[];
export interface ChildFlagsInput {
    sessionPath: string;
    model?: string;
    thinking?: string;
    tools?: string;
    agentPrompt?: string;
}
/**
 * Build the child flags appended after the isolated prefix: `--session <path>`
 * plus optional `--model`, `--thinking`, `--tools`, `--append-system-prompt`.
 * NO `--session-offset`: pi (>= 0.84) resumes a `--session` file AS-IS and
 * rejects the unknown option (`Error: Unknown option: --session-offset`,
 * exit 1) — the continuation byte-offset stays parent-side metadata only.
 * The task itself is NOT placed here — v1 injects the task via stdin one-shot.
 */
export declare function buildChildFlags(input: ChildFlagsInput): string[];