DISCORD_LIMITS

Per-element ceilings the Discord API enforces — the renderer degrades (truncate/clamp) rather than failing when a limit is hit.

Overview

DISCORD_LIMITS is the typed constant the renderer (renderComponents) uses to enforce every Discord API ceiling in one place. Import it when you need to validate or pre-truncate data yourself before passing it to the renderer.

import { DISCORD_LIMITS } from "@copilotkit/bot-discord";

Limits table

Key	Value	Applies to
`componentsPerMessage`	40	total components (nested counted) in a Components V2 message
`textDisplayChars`	2000	chars per `TextDisplay` component
`totalTextChars`	4000	total text chars summed across the message
`buttonsPerRow`	5	buttons per action row
`actionRows`	5	action rows per message
`selectOptions`	25	options per `StringSelectMenu`
`selectPlaceholder`	150	chars per select placeholder
`customId`	100	`custom_id` chars (buttons and selects)
`buttonLabel`	80	button label chars
`headerText`	256	header line chars (a `TextDisplay` rendered with `#` prefix)

Degradation behavior

The renderer degrades instead of failing when a limit is hit:

Text truncation — over-long text in TextDisplay, button labels, and custom_id values is truncated with a trailing … so the output never exceeds the limit.
Array clamping — sub-collections (select options, action rows, buttons per row) are sliced to their cap. Overflow items are dropped without a marker.
Unknown intrinsics — component types the renderer does not recognise are silently skipped; nothing ever throws.

renderComponents — the renderer that enforces these limits
discord() — the adapter