diff --git a/internal/cli/compile/compile.go b/internal/cli/compile/compile.go
index 28227615562..46534eb59b3 100644
--- a/internal/cli/compile/compile.go
+++ b/internal/cli/compile/compile.go
@@ -348,7 +348,7 @@ func runCompileCommand(cmd *cobra.Command, args []string) {
 			UpdatedUploadPort: result.NewPort(uploadRes.GetUpdatedUploadPort()),
 		},
 		ProfileOut:         profileOut,
-		Diagnostics:        compileRes.GetDiagnostics(),
+		Diagnostics:        result.NewCompileDiagnostics(compileRes.GetDiagnostics()),
 		Success:            compileError == nil,
 		showPropertiesMode: showProperties,
 		hideStats:          preprocess,
@@ -393,15 +393,14 @@ type updatedUploadPortResult struct {
 }
 
 type compileResult struct {
-	CompilerOut   string                  `json:"compiler_out"`
-	CompilerErr   string                  `json:"compiler_err"`
-	BuilderResult *result.CompileResponse `json:"builder_result"`
-	UploadResult  updatedUploadPortResult `json:"upload_result"`
-	Success       bool                    `json:"success"`
-	ProfileOut    string                  `json:"profile_out,omitempty"`
-	Error         string                  `json:"error,omitempty"`
-	// TODO: make a proper result.* structure
-	Diagnostics        []*rpc.CompileDiagnostic `json:"diagnostics"`
+	CompilerOut        string                      `json:"compiler_out"`
+	CompilerErr        string                      `json:"compiler_err"`
+	BuilderResult      *result.CompileResponse     `json:"builder_result"`
+	UploadResult       updatedUploadPortResult     `json:"upload_result"`
+	Success            bool                        `json:"success"`
+	ProfileOut         string                      `json:"profile_out,omitempty"`
+	Error              string                      `json:"error,omitempty"`
+	Diagnostics        []*result.CompileDiagnostic `json:"diagnostics"`
 	showPropertiesMode arguments.ShowPropertiesMode
 	hideStats          bool
 }
diff --git a/internal/cli/feedback/result/rpc.go b/internal/cli/feedback/result/rpc.go
index 6b19c138a6d..a632af7737c 100644
--- a/internal/cli/feedback/result/rpc.go
+++ b/internal/cli/feedback/result/rpc.go
@@ -18,6 +18,7 @@ package result
 import (
 	"cmp"
 
+	f "github.com/arduino/arduino-cli/internal/algorithms"
 	"github.com/arduino/arduino-cli/internal/orderedmap"
 	rpc "github.com/arduino/arduino-cli/rpc/cc/arduino/cli/commands/v1"
 	semver "go.bug.st/relaxed-semver"
@@ -880,6 +881,7 @@ type CompileResponse struct {
 	BoardPlatform          *InstalledPlatformReference `json:"board_platform,omitempty"`
 	BuildPlatform          *InstalledPlatformReference `json:"build_platform,omitempty"`
 	BuildProperties        []string                    `json:"build_properties,omitempty"`
+	Diagnostics            []*CompileDiagnostic        `json:"diagnostics,omitempty"`
 }
 
 func NewCompileResponse(c *rpc.CompileResponse) *CompileResponse {
@@ -904,6 +906,7 @@ func NewCompileResponse(c *rpc.CompileResponse) *CompileResponse {
 		BoardPlatform:          NewInstalledPlatformReference(c.GetBoardPlatform()),
 		BuildPlatform:          NewInstalledPlatformReference(c.GetBuildPlatform()),
 		BuildProperties:        c.GetBuildProperties(),
+		Diagnostics:            NewCompileDiagnostics(c.GetDiagnostics()),
 	}
 }
 
@@ -959,3 +962,61 @@ func NewBoardListWatchResponse(r *rpc.BoardListWatchResponse) *BoardListWatchRes
 		Error:     r.Error,
 	}
 }
+
+type CompileDiagnostic struct {
+	Severity string                      `json:"severity,omitempty"`
+	Message  string                      `json:"message,omitempty"`
+	File     string                      `json:"file,omitempty"`
+	Line     int64                       `json:"line,omitempty"`
+	Column   int64                       `json:"column,omitempty"`
+	Context  []*CompileDiagnosticContext `json:"context,omitempty"`
+	Notes    []*CompileDiagnosticNote    `json:"notes,omitempty"`
+}
+
+func NewCompileDiagnostics(cd []*rpc.CompileDiagnostic) []*CompileDiagnostic {
+	return f.Map(cd, NewCompileDiagnostic)
+}
+
+func NewCompileDiagnostic(cd *rpc.CompileDiagnostic) *CompileDiagnostic {
+	return &CompileDiagnostic{
+		Severity: cd.GetSeverity(),
+		Message:  cd.GetMessage(),
+		File:     cd.GetFile(),
+		Line:     cd.GetLine(),
+		Column:   cd.GetColumn(),
+		Context:  f.Map(cd.GetContext(), NewCompileDiagnosticContext),
+		Notes:    f.Map(cd.GetNotes(), NewCompileDiagnosticNote),
+	}
+}
+
+type CompileDiagnosticContext struct {
+	Message string `json:"message,omitempty"`
+	File    string `json:"file,omitempty"`
+	Line    int64  `json:"line,omitempty"`
+	Column  int64  `json:"column,omitempty"`
+}
+
+func NewCompileDiagnosticContext(cdc *rpc.CompileDiagnosticContext) *CompileDiagnosticContext {
+	return &CompileDiagnosticContext{
+		Message: cdc.GetMessage(),
+		File:    cdc.GetFile(),
+		Line:    cdc.GetLine(),
+		Column:  cdc.GetColumn(),
+	}
+}
+
+type CompileDiagnosticNote struct {
+	Message string `json:"message,omitempty"`
+	File    string `json:"file,omitempty"`
+	Line    int64  `json:"line,omitempty"`
+	Column  int64  `json:"column,omitempty"`
+}
+
+func NewCompileDiagnosticNote(cdn *rpc.CompileDiagnosticNote) *CompileDiagnosticNote {
+	return &CompileDiagnosticNote{
+		Message: cdn.GetMessage(),
+		File:    cdn.GetFile(),
+		Line:    cdn.GetLine(),
+		Column:  cdn.GetColumn(),
+	}
+}
diff --git a/internal/cli/feedback/result/rpc_test.go b/internal/cli/feedback/result/rpc_test.go
index 46adbcd8acc..af5259d128e 100644
--- a/internal/cli/feedback/result/rpc_test.go
+++ b/internal/cli/feedback/result/rpc_test.go
@@ -205,6 +205,18 @@ func TestAllFieldAreMapped(t *testing.T) {
 	boardListWatchResponseRpc := &rpc.BoardListWatchResponse{}
 	boardListWatchResponseResult := result.NewBoardListWatchResponse(boardListWatchResponseRpc)
 	mustContainsAllPropertyOfRpcStruct(t, boardListWatchResponseRpc, boardListWatchResponseResult)
+
+	compileDiagnosticRpc := &rpc.CompileDiagnostic{}
+	compileDiagnosticResult := result.NewCompileDiagnostic(compileDiagnosticRpc)
+	mustContainsAllPropertyOfRpcStruct(t, compileDiagnosticRpc, compileDiagnosticResult)
+
+	compileDiagnosticContextRpc := &rpc.CompileDiagnosticContext{}
+	compileDiagnosticContextResult := result.NewCompileDiagnosticContext(compileDiagnosticContextRpc)
+	mustContainsAllPropertyOfRpcStruct(t, compileDiagnosticContextRpc, compileDiagnosticContextResult)
+
+	compileDiagnosticNoteRpc := &rpc.CompileDiagnosticNote{}
+	compileDiagnosticNoteResult := result.NewCompileDiagnosticNote(compileDiagnosticNoteRpc)
+	mustContainsAllPropertyOfRpcStruct(t, compileDiagnosticNoteRpc, compileDiagnosticNoteResult)
 }
 
 func TestEnumsMapsEveryRpcCounterpart(t *testing.T) {