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fix: use json.RawMessage for JSONOutputFormatParam.Schema to preserve key ordering #271

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fix: use json.RawMessage for JSONOutputFormatParam.Schema to preserve key ordering #271

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970b7ef
fix: use json.RawMessage for JSONOutputFormatParam.Schema to preserve…
xiaolin593 Feb 10, 2026
4035de5
Merge remote-tracking branch 'upstream/main' into fix/json-output-for…
xiaolin593 Feb 22, 2026
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3 changes: 1 addition & 2 deletions message.go
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Original file line number Diff line number Diff line change
Expand Up @@ -3359,7 +3359,7 @@ func (r *InputJSONDelta) UnmarshalJSON(data []byte) error {
// The properties Schema, Type are required.
type JSONOutputFormatParam struct {
// The JSON schema of the format
Schema map[string]any `json:"schema,omitzero,required"`
Schema json.RawMessage `json:"schema,omitzero,required"`
// This field can be elided, and will marshal its zero value as "json_schema".
Type constant.JSONSchema `json:"type,required"`
paramObj
Expand Down Expand Up @@ -6367,7 +6367,6 @@ func (u ThinkingConfigParamUnion) GetType() *string {
return nil
}


type ThinkingDelta struct {
Thinking string `json:"thinking,required"`
Type constant.ThinkingDelta `json:"type,required"`
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8 changes: 2 additions & 6 deletions message_test.go
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Expand Up @@ -62,9 +62,7 @@
OutputConfig: anthropic.OutputConfigParam{
Effort: anthropic.OutputConfigEffortLow,
Format: anthropic.JSONOutputFormatParam{
Schema: map[string]any{
"foo": "bar",
},
Schema: json.RawMessage(`{"foo": "bar"}`),

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cannot use map[string]any{…} (value of type map[string]any) as "encoding/json".RawMessage value in struct literal
},
},
ServiceTier: anthropic.MessageNewParamsServiceTierAuto,
Expand Down Expand Up @@ -171,11 +169,9 @@
OutputConfig: anthropic.OutputConfigParam{
Effort: anthropic.OutputConfigEffortLow,
Format: anthropic.JSONOutputFormatParam{
Schema: map[string]any{
"foo": "bar",
},
Schema: json.RawMessage(`{"foo": "bar"}`),
},
},

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cannot use map[string]any{…} (value of type map[string]any) as "encoding/json".RawMessage value in struct literal
System: anthropic.MessageCountTokensParamsSystemUnion{
OfTextBlockArray: []anthropic.TextBlockParam{{
Text: "Today's date is 2024-06-01.",
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5 changes: 2 additions & 3 deletions messagebatch_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@

import (
"context"
"encoding/json"
"errors"
"os"
"testing"
Expand Down Expand Up @@ -61,10 +62,8 @@
},
OutputConfig: anthropic.OutputConfigParam{
Effort: anthropic.OutputConfigEffortLow,
Format: anthropic.JSONOutputFormatParam{

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cannot use map[string]any{…} (value of type map[string]any) as "encoding/json".RawMessage value in struct literal
Schema: map[string]any{
"foo": "bar",
},
Schema: json.RawMessage(`{"foo": "bar"}`),
},
},
ServiceTier: "auto",
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