{"version":"2.1.172","anchor":"structured-output-retraction-error-messages","canonical_anchor":"structured-output-retraction-error-messages","heading":"Structured Output Retraction Error Messages","tier":null,"area":null,"scope":null,"heads_up":null,"url":"https:\/\/changelogs.core-directive.com\/v\/2.1.172\/e\/structured-output-retraction-error-messages","release_url":"https:\/\/changelogs.core-directive.com\/v\/2.1.172","markdown":"### Structured Output Retraction Error Messages\n\n**What**\n\nWhen a model fallback causes structured output to be retracted and no retry succeeds, Claude Code now surfaces a more specific error message instead of the previous \"the cloud agent called StructuredOutput but every attempt failed schema validation.\"\n\nNew message: \"the cloud agent called StructuredOutput but no attempt produced a surviving valid output (failed schema validation, or retracted by a model fallback)\"\n\n**Evidence**\n\nUpdated error string (search for `\"retracted by a model fallback and no retry produced a valid result\"`)"}