plugin-legal-ai/node_modules/@paperclipai/plugin-sdk/dist/protocol.d.ts

/**
 * JSON-RPC 2.0 message types and protocol helpers for the host ↔ worker IPC
 * channel.
 *
 * The Paperclip plugin runtime uses JSON-RPC 2.0 over stdio to communicate
 * between the host process and each plugin worker process. This module defines:
 *
 * - Core JSON-RPC 2.0 envelope types (request, response, notification, error)
 * - Standard and plugin-specific error codes
 * - Typed method maps for host→worker and worker→host calls
 * - Helper functions for creating well-formed messages
 *
 * @see PLUGIN_SPEC.md §12.1 — Process Model
 * @see PLUGIN_SPEC.md §13 — Host-Worker Protocol
 * @see https://www.jsonrpc.org/specification
 */
import type { PaperclipPluginManifestV1, PluginLauncherBounds, PluginLauncherRenderContextSnapshot, PluginStateScopeKind, Company, Project, Issue, IssueComment, IssueDocument, IssueDocumentSummary, Agent, Goal } from "@paperclipai/shared";
export type { PluginLauncherRenderContextSnapshot } from "@paperclipai/shared";
import type { PluginEvent, PluginJobContext, PluginWorkspace, ToolRunContext, ToolResult } from "./types.js";
import type { PluginHealthDiagnostics, PluginConfigValidationResult, PluginWebhookInput } from "./define-plugin.js";
/** The JSON-RPC protocol version. Always `"2.0"`. */
export declare const JSONRPC_VERSION: "2.0";
/**
 * A unique request identifier. JSON-RPC 2.0 allows strings or numbers;
 * we use strings (UUIDs or monotonic counters) for all Paperclip messages.
 */
export type JsonRpcId = string | number;
/**
 * A JSON-RPC 2.0 request message.
 *
 * The host sends requests to the worker (or vice versa) and expects a
 * matching response with the same `id`.
 */
export interface JsonRpcRequest<TMethod extends string = string, TParams = unknown> {
    readonly jsonrpc: typeof JSONRPC_VERSION;
    /** Unique request identifier. Must be echoed in the response. */
    readonly id: JsonRpcId;
    /** The RPC method name to invoke. */
    readonly method: TMethod;
    /** Structured parameters for the method call. */
    readonly params: TParams;
}
/**
 * A JSON-RPC 2.0 success response.
 */
export interface JsonRpcSuccessResponse<TResult = unknown> {
    readonly jsonrpc: typeof JSONRPC_VERSION;
    /** Echoed request identifier. */
    readonly id: JsonRpcId;
    /** The method return value. */
    readonly result: TResult;
    readonly error?: never;
}
/**
 * A JSON-RPC 2.0 error object embedded in an error response.
 */
export interface JsonRpcError<TData = unknown> {
    /** Machine-readable error code. */
    readonly code: number;
    /** Human-readable error message. */
    readonly message: string;
    /** Optional structured error data. */
    readonly data?: TData;
}
/**
 * A JSON-RPC 2.0 error response.
 */
export interface JsonRpcErrorResponse<TData = unknown> {
    readonly jsonrpc: typeof JSONRPC_VERSION;
    /** Echoed request identifier. */
    readonly id: JsonRpcId | null;
    readonly result?: never;
    /** The error object. */
    readonly error: JsonRpcError<TData>;
}
/**
 * A JSON-RPC 2.0 response — either success or error.
 */
export type JsonRpcResponse<TResult = unknown, TData = unknown> = JsonRpcSuccessResponse<TResult> | JsonRpcErrorResponse<TData>;
/**
 * A JSON-RPC 2.0 notification (a request with no `id`).
 *
 * Notifications are fire-and-forget — no response is expected.
 */
export interface JsonRpcNotification<TMethod extends string = string, TParams = unknown> {
    readonly jsonrpc: typeof JSONRPC_VERSION;
    readonly id?: never;
    /** The notification method name. */
    readonly method: TMethod;
    /** Structured parameters for the notification. */
    readonly params: TParams;
}
/**
 * Any well-formed JSON-RPC 2.0 message (request, response, or notification).
 */
export type JsonRpcMessage = JsonRpcRequest | JsonRpcResponse | JsonRpcNotification;
/**
 * Standard JSON-RPC 2.0 error codes.
 *
 * @see https://www.jsonrpc.org/specification#error_object
 */
export declare const JSONRPC_ERROR_CODES: {
    /** Invalid JSON was received by the server. */
    readonly PARSE_ERROR: -32700;
    /** The JSON sent is not a valid Request object. */
    readonly INVALID_REQUEST: -32600;
    /** The method does not exist or is not available. */
    readonly METHOD_NOT_FOUND: -32601;
    /** Invalid method parameter(s). */
    readonly INVALID_PARAMS: -32602;
    /** Internal JSON-RPC error. */
    readonly INTERNAL_ERROR: -32603;
};
export type JsonRpcErrorCode = (typeof JSONRPC_ERROR_CODES)[keyof typeof JSONRPC_ERROR_CODES];
/**
 * Paperclip plugin-specific error codes.
 *
 * These live in the JSON-RPC "server error" reserved range (-32000 to -32099)
 * as specified by JSON-RPC 2.0 for implementation-defined server errors.
 *
 * @see PLUGIN_SPEC.md §19.7 — Error Propagation Through The Bridge
 */
export declare const PLUGIN_RPC_ERROR_CODES: {
    /** The worker process is not running or not reachable. */
    readonly WORKER_UNAVAILABLE: -32000;
    /** The plugin does not have the required capability for this operation. */
    readonly CAPABILITY_DENIED: -32001;
    /** The worker reported an unhandled error during method execution. */
    readonly WORKER_ERROR: -32002;
    /** The method call timed out waiting for the worker response. */
    readonly TIMEOUT: -32003;
    /** The worker does not implement the requested optional method. */
    readonly METHOD_NOT_IMPLEMENTED: -32004;
    /** A catch-all for errors that do not fit other categories. */
    readonly UNKNOWN: -32099;
};
export type PluginRpcErrorCode = (typeof PLUGIN_RPC_ERROR_CODES)[keyof typeof PLUGIN_RPC_ERROR_CODES];
/**
 * Input for the `initialize` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.1 — `initialize`
 */
export interface InitializeParams {
    /** Full plugin manifest snapshot. */
    manifest: PaperclipPluginManifestV1;
    /** Resolved operator configuration (validated against `instanceConfigSchema`). */
    config: Record<string, unknown>;
    /** Instance-level metadata. */
    instanceInfo: {
        /** UUID of this Paperclip instance. */
        instanceId: string;
        /** Semver version of the running Paperclip host. */
        hostVersion: string;
    };
    /** Host API version. */
    apiVersion: number;
}
/**
 * Result returned by the `initialize` RPC method.
 */
export interface InitializeResult {
    /** Whether initialization succeeded. */
    ok: boolean;
    /** Optional methods the worker has implemented (e.g. "validateConfig", "onEvent"). */
    supportedMethods?: string[];
}
/**
 * Input for the `configChanged` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.4 — `configChanged`
 */
export interface ConfigChangedParams {
    /** The newly resolved configuration. */
    config: Record<string, unknown>;
}
/**
 * Input for the `validateConfig` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.3 — `validateConfig`
 */
export interface ValidateConfigParams {
    /** The configuration to validate. */
    config: Record<string, unknown>;
}
/**
 * Input for the `onEvent` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.5 — `onEvent`
 */
export interface OnEventParams {
    /** The domain event to deliver. */
    event: PluginEvent;
}
/**
 * Input for the `runJob` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.6 — `runJob`
 */
export interface RunJobParams {
    /** Job execution context. */
    job: PluginJobContext;
}
/**
 * Input for the `getData` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.8 — `getData`
 */
export interface GetDataParams {
    /** Plugin-defined data key (e.g. `"sync-health"`). */
    key: string;
    /** Context and query parameters from the UI. */
    params: Record<string, unknown>;
    /** Optional launcher/container metadata from the host render environment. */
    renderEnvironment?: PluginLauncherRenderContextSnapshot | null;
}
/**
 * Input for the `performAction` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.9 — `performAction`
 */
export interface PerformActionParams {
    /** Plugin-defined action key (e.g. `"resync"`). */
    key: string;
    /** Action parameters from the UI. */
    params: Record<string, unknown>;
    /** Optional launcher/container metadata from the host render environment. */
    renderEnvironment?: PluginLauncherRenderContextSnapshot | null;
}
/**
 * Input for the `executeTool` RPC method.
 *
 * @see PLUGIN_SPEC.md §13.10 — `executeTool`
 */
export interface ExecuteToolParams {
    /** Tool name (without plugin namespace prefix). */
    toolName: string;
    /** Parsed parameters matching the tool's declared schema. */
    parameters: unknown;
    /** Agent run context. */
    runContext: ToolRunContext;
}
/**
 * Bounds request issued by a plugin UI running inside a host-managed launcher
 * container such as a modal, drawer, or popover.
 */
export interface PluginModalBoundsRequest {
    /** High-level size preset requested from the host. */
    bounds: PluginLauncherBounds;
    /** Optional explicit width override in CSS pixels. */
    width?: number;
    /** Optional explicit height override in CSS pixels. */
    height?: number;
    /** Optional lower bounds for host resizing decisions. */
    minWidth?: number;
    minHeight?: number;
    /** Optional upper bounds for host resizing decisions. */
    maxWidth?: number;
    maxHeight?: number;
}
/**
 * Reason metadata supplied by host-managed close lifecycle callbacks.
 */
export interface PluginRenderCloseEvent {
    reason: "escapeKey" | "backdrop" | "hostNavigation" | "programmatic" | "submit" | "unknown";
    nativeEvent?: unknown;
}
/**
 * Map of host→worker RPC method names to their `[params, result]` types.
 *
 * This type is the single source of truth for all methods the host can call
 * on a worker. Used by both the host dispatcher and the worker handler to
 * ensure type safety across the IPC boundary.
 */
export interface HostToWorkerMethods {
    /** @see PLUGIN_SPEC.md §13.1 */
    initialize: [params: InitializeParams, result: InitializeResult];
    /** @see PLUGIN_SPEC.md §13.2 */
    health: [params: Record<string, never>, result: PluginHealthDiagnostics];
    /** @see PLUGIN_SPEC.md §12.5 */
    shutdown: [params: Record<string, never>, result: void];
    /** @see PLUGIN_SPEC.md §13.3 */
    validateConfig: [params: ValidateConfigParams, result: PluginConfigValidationResult];
    /** @see PLUGIN_SPEC.md §13.4 */
    configChanged: [params: ConfigChangedParams, result: void];
    /** @see PLUGIN_SPEC.md §13.5 */
    onEvent: [params: OnEventParams, result: void];
    /** @see PLUGIN_SPEC.md §13.6 */
    runJob: [params: RunJobParams, result: void];
    /** @see PLUGIN_SPEC.md §13.7 */
    handleWebhook: [params: PluginWebhookInput, result: void];
    /** @see PLUGIN_SPEC.md §13.8 */
    getData: [params: GetDataParams, result: unknown];
    /** @see PLUGIN_SPEC.md §13.9 */
    performAction: [params: PerformActionParams, result: unknown];
    /** @see PLUGIN_SPEC.md §13.10 */
    executeTool: [params: ExecuteToolParams, result: ToolResult];
}
/** Union of all host→worker method names. */
export type HostToWorkerMethodName = keyof HostToWorkerMethods;
/** Required methods the worker MUST implement. */
export declare const HOST_TO_WORKER_REQUIRED_METHODS: readonly HostToWorkerMethodName[];
/** Optional methods the worker MAY implement. */
export declare const HOST_TO_WORKER_OPTIONAL_METHODS: readonly HostToWorkerMethodName[];
/**
 * Map of worker→host RPC method names to their `[params, result]` types.
 *
 * These represent the SDK client calls that the worker makes back to the
 * host to access platform services (state, entities, config, etc.).
 */
export interface WorkerToHostMethods {
    "config.get": [params: Record<string, never>, result: Record<string, unknown>];
    "state.get": [
        params: {
            scopeKind: string;
            scopeId?: string;
            namespace?: string;
            stateKey: string;
        },
        result: unknown
    ];
    "state.set": [
        params: {
            scopeKind: string;
            scopeId?: string;
            namespace?: string;
            stateKey: string;
            value: unknown;
        },
        result: void
    ];
    "state.delete": [
        params: {
            scopeKind: string;
            scopeId?: string;
            namespace?: string;
            stateKey: string;
        },
        result: void
    ];
    "entities.upsert": [
        params: {
            entityType: string;
            scopeKind: PluginStateScopeKind;
            scopeId?: string;
            externalId?: string;
            title?: string;
            status?: string;
            data: Record<string, unknown>;
        },
        result: {
            id: string;
            entityType: string;
            scopeKind: PluginStateScopeKind;
            scopeId: string | null;
            externalId: string | null;
            title: string | null;
            status: string | null;
            data: Record<string, unknown>;
            createdAt: string;
            updatedAt: string;
        }
    ];
    "entities.list": [
        params: {
            entityType?: string;
            scopeKind?: PluginStateScopeKind;
            scopeId?: string;
            externalId?: string;
            limit?: number;
            offset?: number;
        },
        result: Array<{
            id: string;
            entityType: string;
            scopeKind: PluginStateScopeKind;
            scopeId: string | null;
            externalId: string | null;
            title: string | null;
            status: string | null;
            data: Record<string, unknown>;
            createdAt: string;
            updatedAt: string;
        }>
    ];
    "events.emit": [
        params: {
            name: string;
            companyId: string;
            payload: unknown;
        },
        result: void
    ];
    "events.subscribe": [
        params: {
            eventPattern: string;
            filter?: Record<string, unknown> | null;
        },
        result: void
    ];
    "http.fetch": [
        params: {
            url: string;
            init?: Record<string, unknown>;
        },
        result: {
            status: number;
            statusText: string;
            headers: Record<string, string>;
            body: string;
        }
    ];
    "secrets.resolve": [
        params: {
            secretRef: string;
        },
        result: string
    ];
    "activity.log": [
        params: {
            companyId: string;
            message: string;
            entityType?: string;
            entityId?: string;
            metadata?: Record<string, unknown>;
        },
        result: void
    ];
    "metrics.write": [
        params: {
            name: string;
            value: number;
            tags?: Record<string, string>;
        },
        result: void
    ];
    "log": [
        params: {
            level: "info" | "warn" | "error" | "debug";
            message: string;
            meta?: Record<string, unknown>;
        },
        result: void
    ];
    "companies.list": [
        params: {
            limit?: number;
            offset?: number;
        },
        result: Company[]
    ];
    "companies.get": [
        params: {
            companyId: string;
        },
        result: Company | null
    ];
    "projects.list": [
        params: {
            companyId: string;
            limit?: number;
            offset?: number;
        },
        result: Project[]
    ];
    "projects.get": [
        params: {
            projectId: string;
            companyId: string;
        },
        result: Project | null
    ];
    "projects.listWorkspaces": [
        params: {
            projectId: string;
            companyId: string;
        },
        result: PluginWorkspace[]
    ];
    "projects.getPrimaryWorkspace": [
        params: {
            projectId: string;
            companyId: string;
        },
        result: PluginWorkspace | null
    ];
    "projects.getWorkspaceForIssue": [
        params: {
            issueId: string;
            companyId: string;
        },
        result: PluginWorkspace | null
    ];
    "issues.list": [
        params: {
            companyId: string;
            projectId?: string;
            assigneeAgentId?: string;
            status?: string;
            limit?: number;
            offset?: number;
        },
        result: Issue[]
    ];
    "issues.get": [
        params: {
            issueId: string;
            companyId: string;
        },
        result: Issue | null
    ];
    "issues.create": [
        params: {
            companyId: string;
            projectId?: string;
            goalId?: string;
            parentId?: string;
            title: string;
            description?: string;
            priority?: string;
            assigneeAgentId?: string;
        },
        result: Issue
    ];
    "issues.update": [
        params: {
            issueId: string;
            patch: Record<string, unknown>;
            companyId: string;
        },
        result: Issue
    ];
    "issues.listComments": [
        params: {
            issueId: string;
            companyId: string;
        },
        result: IssueComment[]
    ];
    "issues.createComment": [
        params: {
            issueId: string;
            body: string;
            companyId: string;
        },
        result: IssueComment
    ];
    "issues.documents.list": [
        params: {
            issueId: string;
            companyId: string;
        },
        result: IssueDocumentSummary[]
    ];
    "issues.documents.get": [
        params: {
            issueId: string;
            key: string;
            companyId: string;
        },
        result: IssueDocument | null
    ];
    "issues.documents.upsert": [
        params: {
            issueId: string;
            key: string;
            body: string;
            companyId: string;
            title?: string;
            format?: string;
            changeSummary?: string;
        },
        result: IssueDocument
    ];
    "issues.documents.delete": [
        params: {
            issueId: string;
            key: string;
            companyId: string;
        },
        result: void
    ];
    "agents.list": [
        params: {
            companyId: string;
            status?: string;
            limit?: number;
            offset?: number;
        },
        result: Agent[]
    ];
    "agents.get": [
        params: {
            agentId: string;
            companyId: string;
        },
        result: Agent | null
    ];
    "agents.pause": [
        params: {
            agentId: string;
            companyId: string;
        },
        result: Agent
    ];
    "agents.resume": [
        params: {
            agentId: string;
            companyId: string;
        },
        result: Agent
    ];
    "agents.invoke": [
        params: {
            agentId: string;
            companyId: string;
            prompt: string;
            reason?: string;
        },
        result: {
            runId: string;
        }
    ];
    "agents.sessions.create": [
        params: {
            agentId: string;
            companyId: string;
            taskKey?: string;
            reason?: string;
        },
        result: {
            sessionId: string;
            agentId: string;
            companyId: string;
            status: "active" | "closed";
            createdAt: string;
        }
    ];
    "agents.sessions.list": [
        params: {
            agentId: string;
            companyId: string;
        },
        result: Array<{
            sessionId: string;
            agentId: string;
            companyId: string;
            status: "active" | "closed";
            createdAt: string;
        }>
    ];
    "agents.sessions.sendMessage": [
        params: {
            sessionId: string;
            companyId: string;
            prompt: string;
            reason?: string;
        },
        result: {
            runId: string;
        }
    ];
    "agents.sessions.close": [
        params: {
            sessionId: string;
            companyId: string;
        },
        result: void
    ];
    "goals.list": [
        params: {
            companyId: string;
            level?: string;
            status?: string;
            limit?: number;
            offset?: number;
        },
        result: Goal[]
    ];
    "goals.get": [
        params: {
            goalId: string;
            companyId: string;
        },
        result: Goal | null
    ];
    "goals.create": [
        params: {
            companyId: string;
            title: string;
            description?: string;
            level?: string;
            status?: string;
            parentId?: string;
            ownerAgentId?: string;
        },
        result: Goal
    ];
    "goals.update": [
        params: {
            goalId: string;
            patch: Record<string, unknown>;
            companyId: string;
        },
        result: Goal
    ];
}
/** Union of all worker→host method names. */
export type WorkerToHostMethodName = keyof WorkerToHostMethods;
/**
 * Typed parameter shapes for worker→host JSON-RPC notifications.
 *
 * Notifications are fire-and-forget — the worker does not wait for a response.
 * These are used for streaming events and logging, not for request-response RPCs.
 */
export interface WorkerToHostNotifications {
    /**
     * Forward a stream event to connected SSE clients.
     *
     * Emitted by the worker for each event on a stream channel. The host
     * publishes to the PluginStreamBus, which fans out to all SSE clients
     * subscribed to the (pluginId, channel, companyId) tuple.
     *
     * The `event` payload is JSON-serializable and sent as SSE `data:`.
     * The default SSE event type is `"message"`.
     */
    "streams.emit": {
        channel: string;
        companyId: string;
        event: unknown;
    };
    /**
     * Signal that a stream channel has been opened.
     *
     * Emitted when the worker calls `ctx.streams.open(channel, companyId)`.
     * UI clients may use this to display a "connected" indicator or begin
     * buffering input. The host tracks open channels so it can emit synthetic
     * close events if the worker crashes.
     */
    "streams.open": {
        channel: string;
        companyId: string;
    };
    /**
     * Signal that a stream channel has been closed.
     *
     * Emitted when the worker calls `ctx.streams.close(channel)`, or
     * synthetically by the host when a worker process exits with channels
     * still open. UI clients should treat this as terminal and disconnect
     * the SSE connection.
     */
    "streams.close": {
        channel: string;
        companyId: string;
    };
}
/** Union of all worker→host notification method names. */
export type WorkerToHostNotificationName = keyof WorkerToHostNotifications;
/**
 * A typed JSON-RPC request for a specific host→worker method.
 */
export type HostToWorkerRequest<M extends HostToWorkerMethodName> = JsonRpcRequest<M, HostToWorkerMethods[M][0]>;
/**
 * A typed JSON-RPC success response for a specific host→worker method.
 */
export type HostToWorkerResponse<M extends HostToWorkerMethodName> = JsonRpcSuccessResponse<HostToWorkerMethods[M][1]>;
/**
 * A typed JSON-RPC request for a specific worker→host method.
 */
export type WorkerToHostRequest<M extends WorkerToHostMethodName> = JsonRpcRequest<M, WorkerToHostMethods[M][0]>;
/**
 * A typed JSON-RPC success response for a specific worker→host method.
 */
export type WorkerToHostResponse<M extends WorkerToHostMethodName> = JsonRpcSuccessResponse<WorkerToHostMethods[M][1]>;
/**
 * Create a JSON-RPC 2.0 request message.
 *
 * @param method - The RPC method name
 * @param params - Structured parameters
 * @param id - Optional explicit request ID (auto-generated if omitted)
 */
export declare function createRequest<TMethod extends string>(method: TMethod, params: unknown, id?: JsonRpcId): JsonRpcRequest<TMethod>;
/**
 * Create a JSON-RPC 2.0 success response.
 *
 * @param id - The request ID being responded to
 * @param result - The result value
 */
export declare function createSuccessResponse<TResult>(id: JsonRpcId, result: TResult): JsonRpcSuccessResponse<TResult>;
/**
 * Create a JSON-RPC 2.0 error response.
 *
 * @param id - The request ID being responded to (null if the request ID could not be determined)
 * @param code - Machine-readable error code
 * @param message - Human-readable error message
 * @param data - Optional structured error data
 */
export declare function createErrorResponse<TData = unknown>(id: JsonRpcId | null, code: number, message: string, data?: TData): JsonRpcErrorResponse<TData>;
/**
 * Create a JSON-RPC 2.0 notification (fire-and-forget, no response expected).
 *
 * @param method - The notification method name
 * @param params - Structured parameters
 */
export declare function createNotification<TMethod extends string>(method: TMethod, params: unknown): JsonRpcNotification<TMethod>;
/**
 * Check whether a value is a well-formed JSON-RPC 2.0 request.
 *
 * A request has `jsonrpc: "2.0"`, a string `method`, and an `id`.
 */
export declare function isJsonRpcRequest(value: unknown): value is JsonRpcRequest;
/**
 * Check whether a value is a well-formed JSON-RPC 2.0 notification.
 *
 * A notification has `jsonrpc: "2.0"`, a string `method`, but no `id`.
 */
export declare function isJsonRpcNotification(value: unknown): value is JsonRpcNotification;
/**
 * Check whether a value is a well-formed JSON-RPC 2.0 response (success or error).
 */
export declare function isJsonRpcResponse(value: unknown): value is JsonRpcResponse;
/**
 * Check whether a JSON-RPC response is a success response.
 */
export declare function isJsonRpcSuccessResponse(response: JsonRpcResponse): response is JsonRpcSuccessResponse;
/**
 * Check whether a JSON-RPC response is an error response.
 */
export declare function isJsonRpcErrorResponse(response: JsonRpcResponse): response is JsonRpcErrorResponse;
/**
 * Line delimiter for JSON-RPC messages over stdio.
 *
 * Each message is a single line of JSON terminated by a newline character.
 * This follows the newline-delimited JSON (NDJSON) convention.
 */
export declare const MESSAGE_DELIMITER: "\n";
/**
 * Serialize a JSON-RPC message to a newline-delimited string for transmission
 * over stdio.
 *
 * @param message - Any JSON-RPC message (request, response, or notification)
 * @returns The JSON string terminated with a newline
 */
export declare function serializeMessage(message: JsonRpcMessage): string;
/**
 * Parse a JSON string into a JSON-RPC message.
 *
 * Returns the parsed message or throws a `JsonRpcParseError` if the input
 * is not valid JSON or does not conform to the JSON-RPC 2.0 structure.
 *
 * @param line - A single line of JSON text (with or without trailing newline)
 * @returns The parsed JSON-RPC message
 * @throws {JsonRpcParseError} If parsing fails
 */
export declare function parseMessage(line: string): JsonRpcMessage;
/**
 * Error thrown when a JSON-RPC message cannot be parsed.
 */
export declare class JsonRpcParseError extends Error {
    readonly name = "JsonRpcParseError";
    constructor(message: string);
}
/**
 * Error thrown when a JSON-RPC call fails with a structured error response.
 *
 * Captures the full `JsonRpcError` so callers can inspect the code and data.
 */
export declare class JsonRpcCallError extends Error {
    readonly name = "JsonRpcCallError";
    /** The JSON-RPC error code. */
    readonly code: number;
    /** Optional structured error data from the response. */
    readonly data: unknown;
    constructor(error: JsonRpcError);
}
/**
 * Reset the internal request ID counter. **For testing only.**
 *
 * @internal
 */
export declare function _resetIdCounter(): void;
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