No CRUD. No Complex APIs.
Everything is a Flow.

await saraldb.tx()
  .flow(async tx => {
    // Fetch state using .pull()
    const course = await tx.courses.pull(courseId);

    // Query using .when()
    const dup = await tx.leads.when(l => 
      l.email === email || l.phone === formattedPhone
    );

    if (dup?.course?.category === course.category) {
      throw new Error("Duplicate lead category");
    }

    const stage = await tx.stages.when("New Leads");

    // Create entry using .push()
    const lead = await tx.leads.push({
      ...req.body,
      phone: formattedPhone,
      stage: stage.id
    });

    // Append log event using .push()
    await tx.leadHistory.push({
      lead: lead.id,
      event: "lead_created"
    });
  })
  .commit();