/**
 * The one file the Relay channel for Claude Code reads. Its three names, its
 * folder and its format are the channel's own
 * (packages/claude-code/src/config.ts, `loadConfig` and `parseEnvFile`;
 * packages/claude-code/README.md, "Manual environment fallback"). The folder is
 * owner-only and the file is mode 600, because it holds an agent's token.
 */
export declare const CHANNEL_ENV_KEYS: readonly ["RELAY_AGENT_TOKEN", "RELAY_BASE_URL", "RELAY_ALLOWED_SENDERS"];
export declare const CHANNEL_DIR_MODE = 448;
export declare const CHANNEL_FILE_MODE = 384;
export interface ChannelEnvValues {
    token: string;
    baseURL: string;
    /** Handles or Contact ids allowed to message this agent. */
    allowedSenders: readonly string[];
}
/** The channel's own reader: last line wins, quotes optional, `export` allowed. */
export declare const readChannelEnv: (contents: string) => Record<string, string>;
/**
 * Rewrites only the named keys, in place. Every other line a person or another
 * tool put in this file is kept exactly where it was. Shared by every runtime
 * that keeps its Relay settings in a .env file (Claude Code, Hermes).
 */
export declare const renderEnvFile: (existing: string, changes: Record<string, string>) => string;
export declare const renderChannelEnv: (existing: string, values: ChannelEnvValues) => string;
export interface ChannelEnvState {
    path: string;
    exists: boolean;
    /** The token already in the file, when it holds one. Never printed. */
    token?: string;
    baseURL?: string;
    allowedSenders: string[];
    contents: string;
}
export declare const inspectChannelEnv: (channelDir: string) => Promise<ChannelEnvState>;
/**
 * Writes the file the way the Relay config is written (private-file.ts): an
 * exclusive temporary file in the same folder, private before the token lands
 * in it, renamed over the destination, read back. Owner-only by the platform's
 * own means: mode bits on POSIX, a private ACL on Windows.
 */
export declare const writeChannelEnv: (channelDir: string, values: ChannelEnvValues, platform?: NodeJS.Platform) => Promise<{
    path: string;
    contents: string;
}>;
/** The same private write for any runtime's .env file: only the named keys change. */
export declare const writeEnvFile: (path: string, changes: Record<string, string>, label: string, platform?: NodeJS.Platform) => Promise<{
    path: string;
    contents: string;
}>;
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