Composer

Build a message from typed segments. The right pane shows the exact toEntities payload transport-fetch would send — validated, never raw.

Add a segment

Segments

plain Build

bold passed

Live preview

Build passed

12:00✓✓

Builder code

message([
  text("Build "),
  bold(text("passed"))
])

Wire payload (zod-validated)

12 / 4096

{
  "text": "Build passed",
  "entities": [
    {
      "type": "bold",
      "offset": 6,
      "length": 6
    }
  ]
}