/**
 * serve-descriptor — the ONE validator for the untrusted daemon-discovery
 * artifact `.openlore/serve.json`.
 *
 * The descriptor is a repo-local, attacker-writable file that OpenLore reads at
 * three sites — the `serve` CLI, the serve-client the stdio MCP server delegates
 * through, and the Pi extension. Each reader then FETCHES the host/port the file
 * names for a liveness probe and, on a healthy answer, POSTs the project
 * directory and full tool arguments to it. A poisoned descriptor is therefore an
 * SSRF / egress vector, a leak of the directory + tool args, and a result-
 * poisoning channel into the agent's context (mcp-security: Untrusted Artifact
 * Deserialization). One threat model must not have three postures.
 *
 * This module is the one lock, extracted verbatim from `serve.ts`'s existing
 * reader: loopback-only host, integer port 1–65535, integer pid > 0, token
 * absent-or-string. No check is invented here beyond the ones `serve` already
 * applied. A descriptor that fails any check is treated exactly as ABSENT — the
 * reader returns null and the caller takes its existing no-daemon path (spawn a
 * fresh daemon or fall back to in-process dispatch). No field of an invalid
 * descriptor ever becomes a fetch target, a request header, or a signal target.
 *
 * Dependency-light by contract (mcp-security ServeDescriptorValidatedAtEveryReader
 * + the MCP↔Pi parity doctrine): it imports only node builtins and the loopback
 * predicate it shares with the HTTP guard, so the Pi host can import it without
 * pulling in the analyzer.
 */
/**
 * The validated daemon-discovery descriptor. `startedAt` / `version` are
 * advisory metadata (normalized to '' when absent or ill-typed); the other four
 * fields are security-critical and are only present on a descriptor that passed
 * {@link validateServeDescriptor}.
 */
export interface ServeDescriptor {
    port: number;
    pid: number;
    host: string;
    token?: string;
    startedAt: string;
    version: string;
}
/**
 * Validate an already-parsed value as a {@link ServeDescriptor}. Returns the
 * normalized descriptor, or null if ANY security-critical field is
 * missing / ill-typed / out of range, or the host is not a loopback form.
 */
export declare function validateServeDescriptor(parsed: unknown): ServeDescriptor | null;
/**
 * Read + validate a serve.json at `descriptorPath`. Any failure — missing file,
 * malformed JSON, or a descriptor that fails {@link validateServeDescriptor} —
 * resolves to null, so a poisoned descriptor is indistinguishable from an absent
 * one and no field of it ever reaches a fetch, a header, or a signal target.
 */
export declare function readServeDescriptor(descriptorPath: string): Promise<ServeDescriptor | null>;
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