/**
 * Agent config resolver with project-level discovery.
 *
 * Fixes the single-machine multi-agent collision bug where two Claude Code
 * sessions on one machine share `~/.claude/mcp.json` and therefore share
 * one set of credentials.
 *
 * Resolution hierarchy (first match wins):
 *   1. `env.AGENTDROP_API_KEY` + `env.AGENTDROP_AGENT_ID` set
 *      → use env credentials directly; optionally load extra fields from
 *        `env.AGENTDROP_CONFIG_DIR/config.json` (agent_uuid, encryption keys).
 *   2. `env.AGENTDROP_CONFIG_DIR` set alone
 *      → load the whole config from that directory.
 *   3. Project-level discovery: walk up from `cwd` looking for
 *      `.agentdrop/config.json`. Stop at first match, home dir, or FS root.
 *   4. Global fallback: `~/.agentdrop/config.json`.
 *   5. Nothing found → throw a ConfigResolutionError with diagnostic info.
 *
 * The function is PURE: all FS + env access is dependency-injected so it
 * can be unit-tested without touching the real filesystem.
 */
export interface ResolvedAgentConfig {
    apiKey: string;
    agentId: string;
    agentUuid?: string;
    configDir?: string;
    source: "env" | "env-config-dir" | "project" | "project-ancestor" | "global";
}
export interface ResolverEnv {
    AGENTDROP_API_KEY?: string;
    AGENTDROP_AGENT_ID?: string;
    AGENTDROP_AGENT_UUID?: string;
    AGENTDROP_CONFIG_DIR?: string;
}
export interface ResolverDeps {
    cwd: string;
    homeDir: string;
    env: ResolverEnv;
    exists: (path: string) => boolean;
    readJsonFile: (path: string) => Record<string, unknown> | null;
}
export declare class ConfigResolutionError extends Error {
    searched: string[];
    constructor(message: string, searched: string[]);
}
export declare function resolveAgentConfig(deps: ResolverDeps): ResolvedAgentConfig;