// Copyright (c) 2026 Adin Kwok <adin@adin.dev>
import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import type { AbletonOSC } from "../osc-client.js";
export function registerSessionResource(server: McpServer, osc: AbletonOSC) {
server.resource(
"session",
"ableton://session",
{ description: "Current Ableton session state", mimeType: "application/json" },
async (uri) => {
const [tempo] = await osc.query("/live/song/get/tempo");
const [isPlaying] = await osc.query("/live/song/get/is_playing");
const [numTracks] = await osc.query("/live/song/get/num_tracks");
const [numScenes] = await osc.query("/live/song/get/num_scenes");
const [sigNum] = await osc.query("/live/song/get/signature_numerator");
const [sigDen] = await osc.query("/live/song/get/signature_denominator");
const [songTime] = await osc.query("/live/song/get/current_song_time");
const [metronome] = await osc.query("/live/song/get/metronome");
const state = {
tempo,
isPlaying: !!isPlaying,
numTracks,
numScenes,
timeSignature: `${sigNum}/${sigDen}`,
currentPosition: songTime,
metronome: !!metronome,
};
return {
contents: [{ uri: uri.href, mimeType: "application/json", text: JSON.stringify(state, null, 2) }],
};
},
);
}
