How do I contextualize who is sending the command?

[glacial burrow]

    const { commands: Commands, arguments: Arguments } = event;
    
    event.register(
        Commands.literal('pegar_missao')
            .executes(context => {
                jogador = context.sender //that doesn't exist
                let procurados = event.server.players.filter(player => player.persistentData.pk > 1);
                let alvo = procurados[Math.floor    (Math.random() * procurados.length)];
                jogador.tell(`Você recebeu a missão de eliminar ${alvo.name}.`);
                jogador.tell(`As coordenadas de seu alvo são: X=${alvo.x}, Y=${alvo.y}, Z=${alvo.z}.`);
                })
        )
    })```
Exists any doc about predefined variables like this?

[heavy bane]

Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

[outer garden]

it should be context.source.player or context.source.entity, though you should probably check context.source.isPlayer() first in case the command is ran from a command block or through /execute as

as for the second question:

??addon ProbeJS

[glacial loom]

ProbeJS is an addon mod for KubeJS that generates typings files for VSCode, allowing VSCode to offer autocompletions for a ton of things!

Mod by @vital carbon

[outer garden]

You can find most things through the autocompletions probejs provides.

[glacial burrow]

thank you