Server-Side Composition

You can compose capabilities using ctx.call or ctx.parallel within your functions. This allows you to build complex workflows from simple, reusable capabilities.

Sequential Composition

Call another capability and await its result.

export default async function create(input, ctx: Ctx) {
  const user = await ctx.call("db.createUser", input);
  await ctx.call("email.sendWelcome", { email: user.email });
  return user;
}

Parallel Execution

Run multiple capabilities concurrently.

const [users, posts] = await ctx.parallel([
  { fn: "user.list" },
  { fn: "post.list" },
]);