fix(httputil): rename error body field platformCode → platform_code

errorBody() map key corrected from "platformCode" to "platform_code" to
match the OpenAPI spec snake_case convention. All HTTP error responses
produced by Error(w, err) now emit "platform_code" in the JSON body.
PR.md added to .gitignore.
Depends on xerrors v1.0.2 (go.mod bumped in follow-up commit after xerrors tag).

.gitignore

@@ -36,3 +36,4 @@ Thumbs.db
 # VCS files
 COMMIT.md
 RELEASE.md
+PR.md

CHANGELOG.md

@@ -5,6 +5,17 @@ All notable changes to this module will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this module adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.0.1] - 2026-05-22
+
+### Fixed
+
+- `errorBody` JSON key corrected from `"platformCode"` to `"platform_code"` to
+  match the OpenAPI spec snake_case convention. All HTTP error responses now
+  emit `"platform_code"` in the JSON body.
+- Dependency `xerrors` bumped to v1.0.2.
+
+[1.0.1]: https://code.nochebuena.dev/go/httputil/compare/v1.0.0...v1.0.1
+
 ## [1.0.0] - 2026-05-12
 
 ### Changed

go.mod

@@ -4,7 +4,7 @@ go 1.26
 
 require (
 	code.nochebuena.dev/go/valid v1.0.1
-	code.nochebuena.dev/go/xerrors v1.0.1
+	code.nochebuena.dev/go/xerrors v1.0.2
 )
 
 require (

go.sum

@@ -2,6 +2,8 @@ code.nochebuena.dev/go/valid v1.0.1 h1:8O7uW8ufPk8lZ2EvKmTJpIrp9WsNjRg/KqMTxeTAT
 code.nochebuena.dev/go/valid v1.0.1/go.mod h1:tSZiKc/108a1hGUnKe/dCg+TfM9HPcrdhZyW4VgCLjU=
 code.nochebuena.dev/go/xerrors v1.0.1 h1:fgXoabY/ZwxAzaM1sKFf3sbL7ZHWyDxItB/rdbnl0mo=
 code.nochebuena.dev/go/xerrors v1.0.1/go.mod h1:03MMVfrhaf4XmTMgMrEUFCmuZPGHUCKDitiQvwCuwvY=
+code.nochebuena.dev/go/xerrors v1.0.2 h1:PHkn9RXJdvz5fm3n1TCLo2qCzBqBfnQj5/4oF0nEWyk=
+code.nochebuena.dev/go/xerrors v1.0.2/go.mod h1:03MMVfrhaf4XmTMgMrEUFCmuZPGHUCKDitiQvwCuwvY=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gabriel-vasile/mimetype v1.4.12 h1:e9hWvmLYvtp846tLHam2o++qitpguFiYCKbn0w9jyqw=

httputil_test.go

@@ -248,8 +248,8 @@ func TestError_PlatformCode_IncludedWhenSet(t *testing.T) {
 		t.Errorf("want 404, got %d", rec.Code)
 	}
 	m := decodeMap(t, rec)
-	if m["platformCode"] != "EMPLOYEE_NOT_FOUND" {
+	if m["platform_code"] != "EMPLOYEE_NOT_FOUND" {
-		t.Errorf("platformCode: want EMPLOYEE_NOT_FOUND, got %v", m["platformCode"])
+		t.Errorf("platform_code: want EMPLOYEE_NOT_FOUND, got %v", m["platform_code"])
 	}
 }
 
@@ -257,8 +257,8 @@ func TestError_PlatformCode_OmittedWhenNotSet(t *testing.T) {
 	rec := httptest.NewRecorder()
 	Error(rec, xerrors.New(xerrors.ErrInternal, "unexpected error"))
 	m := decodeMap(t, rec)
-	if _, ok := m["platformCode"]; ok {
+	if _, ok := m["platform_code"]; ok {
-		t.Errorf("platformCode should be absent for errors without a platform code, got %v", m["platformCode"])
+		t.Errorf("platform_code should be absent for errors without a platform code, got %v", m["platform_code"])
 	}
 }
 

response.go

@@ -45,7 +45,7 @@ func errorBody(code, platformCode, message string, fields map[string]any) map[st
 		"message": message,
 	}
 	if platformCode != "" {
-		m["platformCode"] = platformCode
+		m["platform_code"] = platformCode
 	}
 	for k, v := range fields {
 		m[k] = v