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lib: add capabilities & version getters #24

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Merged
ochafik merged 2 commits into from
Nov 25, 2025
Merged

lib: add capabilities & version getters #24

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93f242b
add App{,Bridge}.get{App,Host}{Version,Capabilities}()
ochafik Nov 25, 2025
c584ebe
Add App.{oncalltool,onlisttools}
ochafik Nov 25, 2025
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17 changes: 13 additions & 4 deletions src/app-bridge.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -63,12 +63,13 @@ type HostOptions = ProtocolOptions;

export const SUPPORTED_PROTOCOL_VERSIONS = [LATEST_PROTOCOL_VERSION];

type RequestExtra = Parameters<
type RequestHandlerExtra = Parameters<
Parameters<AppBridge["setRequestHandler"]>[1]
>[1];

export class AppBridge extends Protocol<Request, Notification, Result> {
private _appCapabilities?: McpUiAppCapabilities;
private _appInfo?: Implementation;

constructor(
private _client: Client,
Expand All @@ -88,7 +89,14 @@ export class AppBridge extends Protocol<Request, Notification, Result> {
});
}

onping?: (params: PingRequest["params"], extra: RequestExtra) => void;
getAppCapabilities(): McpUiAppCapabilities | undefined {
return this._appCapabilities;
}
getAppVersion(): Implementation | undefined {
return this._appInfo;
}

onping?: (params: PingRequest["params"], extra: RequestHandlerExtra) => void;

set onsizechange(
callback: (params: McpUiSizeChangeNotification["params"]) => void,
Expand All @@ -114,7 +122,7 @@ export class AppBridge extends Protocol<Request, Notification, Result> {
set onmessage(
callback: (
params: McpUiMessageRequest["params"],
extra: RequestExtra,
extra: RequestHandlerExtra,
) => Promise<McpUiMessageResult>,
) {
this.setRequestHandler(
Expand All @@ -127,7 +135,7 @@ export class AppBridge extends Protocol<Request, Notification, Result> {
set onopenlink(
callback: (
params: McpUiOpenLinkRequest["params"],
extra: RequestExtra,
extra: RequestHandlerExtra,
) => Promise<McpUiOpenLinkResult>,
) {
this.setRequestHandler(
Expand Down Expand Up @@ -168,6 +176,7 @@ export class AppBridge extends Protocol<Request, Notification, Result> {
const requestedVersion = request.params.protocolVersion;

this._appCapabilities = request.params.appCapabilities;
this._appInfo = request.params.appInfo;

const protocolVersion = SUPPORTED_PROTOCOL_VERSIONS.includes(
requestedVersion,
Expand Down
35 changes: 35 additions & 0 deletions src/app.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,9 +6,12 @@ import {

import {
CallToolRequest,
CallToolRequestSchema,
CallToolResult,
CallToolResultSchema,
Implementation,
ListToolsRequest,
ListToolsRequestSchema,
LoggingMessageNotification,
Notification,
PingRequestSchema,
Expand Down Expand Up @@ -47,6 +50,10 @@ type AppOptions = ProtocolOptions & {
autoResize?: boolean;
};

type RequestHandlerExtra = Parameters<
Parameters<App["setRequestHandler"]>[1]
>[1];

export class App extends Protocol<Request, Notification, Result> {
private _hostCapabilities?: McpUiHostCapabilities;
private _hostInfo?: Implementation;
Expand All @@ -64,6 +71,14 @@ export class App extends Protocol<Request, Notification, Result> {
});
}

getHostCapabilities(): McpUiHostCapabilities | undefined {
return this._hostCapabilities;
}

getHostVersion(): Implementation | undefined {
return this._hostInfo;
}

set ontoolinput(
callback: (params: McpUiToolInputNotification["params"]) => void,
) {
Expand Down Expand Up @@ -93,6 +108,26 @@ export class App extends Protocol<Request, Notification, Result> {
(n) => callback(n.params),
);
}
set oncalltool(
callback: (
params: CallToolRequest["params"],
extra: RequestHandlerExtra,
) => Promise<CallToolResult>,
) {
this.setRequestHandler(CallToolRequestSchema, (request, extra) =>
callback(request.params, extra),
);
}
set onlisttools(
callback: (
params: ListToolsRequest["params"],
extra: RequestHandlerExtra,
) => Promise<{ tools: string[] }>,
) {
this.setRequestHandler(ListToolsRequestSchema, (request, extra) =>
callback(request.params, extra),
);
}

assertCapabilityForMethod(method: Request["method"]): void {
// TODO
Expand Down