A naïve msjon impl for node.js.

mjson.js

#!/usr/bin/env node

var chunks = [];
process.stdin.on('data', chunks.push.bind(chunks));
process.stdin.on('end', function () {
    var json;
    json = Buffer.concat(chunks).toString('utf8');
    json = JSON.parse(json);
    json = JSON.stringify(json, null, 2);
    process.stdout.write(json);
});