Changes to Get session messages

Changed in 13 of the 102 revisions of this API.●10○15

1. Aug 6, 20264e11f1aed2fd○2
2. Jun 29, 2026e7837fb0de8f○1
3. Apr 29, 2026ba1ceff8b2ff○1
4. Apr 29, 20263e3822f627bd●1
5. Apr 29, 2026ba1ceff8b2ff○1
6. Apr 28, 20263e3822f627bd●1
7. Apr 28, 2026ba1ceff8b2ff○1
8. Feb 12, 20267eb1c31fb938○3
9. Feb 11, 20268f23f1074f57○2
10. Feb 9, 20263e70f65f33fa○1
11. Feb 6, 202673bbed0ce3ce○1
12. Feb 2, 2026e5d84d7cf554○1
13. Jan 20, 2026c7ae6a68e4fb●8○1

What changed

• Aug 6, 20264e11f1aed2fd○2See the full diff
  • ○

    added the optional property items/info/anyOf[AssistantMessage]/stuckAborted to the response with the 200 status

    response-optional-property-added

  • ○

    added the optional property items/info/anyOf[AssistantMessage]/stuckNudged to the response with the 200 status

    response-optional-property-added

• Jun 29, 2026e7837fb0de8f○1See the full diff
  • ○

    added the optional property items/info/anyOf[AssistantMessage]/stepCapped to the response with the 200 status

    response-optional-property-added

• Apr 29, 2026ba1ceff8b2ff○1See the full diff
  • ○

    added the optional property items/info/anyOf[UserMessage]/excludeHistory to the response with the 200 status

    response-optional-property-added

• Apr 29, 20263e3822f627bd●1See the full diff
  • ●

    removed the optional property items/info/anyOf[UserMessage]/excludeHistory from the response with the 200 status

    response-optional-property-removed

  This revision also has 7 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Apr 29, 2026ba1ceff8b2ff○1See the full diff
  • ○

    added the optional property items/info/anyOf[UserMessage]/excludeHistory to the response with the 200 status

    response-optional-property-added

• Apr 28, 20263e3822f627bd●1See the full diff
  • ●

    removed the optional property items/info/anyOf[UserMessage]/excludeHistory from the response with the 200 status

    response-optional-property-removed

  This revision also has 7 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog

• Apr 28, 2026ba1ceff8b2ff○1See the full diff
  • ○

    added the optional property items/info/anyOf[UserMessage]/excludeHistory to the response with the 200 status

    response-optional-property-added

• Feb 12, 20267eb1c31fb938○3See the full diff
  • ○

    added the optional property items/info/anyOf[AssistantMessage]/structured to the response with the 200 status

    response-optional-property-added

  • ○

    added the optional property items/info/anyOf[UserMessage]/format to the response with the 200 status

    response-optional-property-added

  • ○

    added StructuredOutputError to the items/info/anyOf[AssistantMessage]/error response property anyOf list for the response status 200

    response-property-any-of-added

• Feb 11, 20268f23f1074f57○2See the full diff
  • ○

    added the optional property items/info/anyOf[AssistantMessage]/tokens/total to the response with the 200 status

    response-optional-property-added

  • ○

    added the optional property items/parts/items/anyOf[StepFinishPart]/tokens/total to the response with the 200 status

    response-optional-property-added

• Feb 9, 20263e70f65f33fa○1See the full diff
  • ○

    added ContextOverflowError to the items/info/anyOf[AssistantMessage]/error response property anyOf list for the response status 200

    response-property-any-of-added

• Feb 6, 202673bbed0ce3ce○1See the full diff
  • ○

    added the optional property items/info/anyOf[AssistantMessage]/variant to the response with the 200 status

    response-optional-property-added

• Feb 2, 2026e5d84d7cf554○1See the full diff
  • ○

    added the optional property items/info/anyOf[UserMessage]/summary/diffs/items/status to the response with the 200 status

    response-optional-property-added

• Jan 20, 2026c7ae6a68e4fb●8○1See the full diff
  • ●

    removed the optional property items/info/anyOf[AssistantMessage]/stepCapped from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[AssistantMessage]/structured from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[AssistantMessage]/tokens/total from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[AssistantMessage]/variant from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[UserMessage]/excludeHistory from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[UserMessage]/format from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/info/anyOf[UserMessage]/summary/diffs/items/status from the response with the 200 status

    response-optional-property-removed

  • ●

    removed the optional property items/parts/items/anyOf[StepFinishPart]/tokens/total from the response with the 200 status

    response-optional-property-removed

  • ○

    removed StructuredOutputError ContextOverflowError from the items/info/anyOf[AssistantMessage]/error response property anyOf list for the response status 200

    response-property-any-of-removed

  This revision also has 36 changes that name no endpoint, such as unreferenced schemas being removed. See the revision's changelog