changelog

Author: colinloretz

docs/change-log/2025-04-03-per-attachment-file-upload-limit.md

@@ -0,0 +1,18 @@
+---
+title: "Per-Attachment File Upload Limit for Apps"
+date: "2025-04-03"
+breaking: false
+topics:
+- "HTTP API"
+- "Interactions"
+---
+
+Starting today, file upload limits for apps are checked per-attachment rather than per-message. This change makes the attachment behavior for apps the same as when a user uploads multiple attachments on a single message.
+
+- File size limits now apply to each individual attachment
+- Previously, limits were applied to the combined size of all attachments in a message
+- This aligns app attachment handling with user attachment behavior
+
+Additionally, the interaction payload will include a new `attachment_size_limit` key that specifies the maximum allowed attachment size, which may exceed the default attachment size limit in boosted guilds.
+
+For more information, check out [our documentation on file uploads](#DOCS_REFERENCE/uploading-files).

docs/interactions/receiving-and-responding.mdx

@@ -37,7 +37,7 @@ For [Message Components](#DOCS_INTERACTIONS_MESSAGE_COMPONENTS/) it includes ide
 | entitlements                   | array of [entitlement](#DOCS_RESOURCES_ENTITLEMENT/entitlement-object) objects                                                        | For [monetized apps](#DOCS_MONETIZATION_OVERVIEW), any entitlements for the invoking user, representing access to premium [SKUs](#DOCS_RESOURCES_SKU)                                                                                                                |
 | authorizing_integration_owners | dictionary with keys of [application integration types](#DOCS_RESOURCES_APPLICATION/application-object-application-integration-types) | Mapping of installation contexts that the interaction was authorized for to related user or guild IDs. See [Authorizing Integration Owners Object](#DOCS_INTERACTIONS_RECEIVING_AND_RESPONDING/interaction-object-authorizing-integration-owners-object) for details |
 | context?                       | [interaction context type](#DOCS_INTERACTIONS_RECEIVING_AND_RESPONDING/interaction-object-interaction-context-types)                  | Context where the interaction was triggered from                                                                                                                                                                                                                     |
-| attachment_size_limit          | integer                                                                                                                               | Attachment size limit in bytes                                                                                                                                                                                                                                 |
+| attachment_size_limit          | integer                                                                                                                               | Attachment size limit in bytes                                                                                                                                                                                                                                       |
 
 \* This is always present on application command, message component, and modal submit interaction types. It is optional for future-proofing against new interaction types