refactor: keep downstream client metadata on cli profiles

src/server/proxy-core/cliProfiles/claudeCodeProfile.ts

@@ -48,6 +48,9 @@ export const claudeCodeCliProfile: CliProfileDefinition = {
       id: 'claude_code',
       sessionId,
       traceHint: sessionId,
+      clientAppId: 'claude_code',
+      clientAppName: 'Claude Code',
+      clientConfidence: 'exact',
     };
   },
 };

src/server/proxy-core/cliProfiles/codexProfile.ts

@@ -189,9 +189,21 @@ export const codexCliProfile: CliProfileDefinition = {
     if (!isCodexRequest(input)) return null;
 
     const sessionId = getCodexSessionId(input.headers) || undefined;
+    const clientApp = detectCodexOfficialClientApp(input.headers);
     return {
       id: 'codex',
       ...(sessionId ? { sessionId, traceHint: sessionId } : {}),
+      ...(clientApp
+        ? {
+          clientAppId: clientApp.clientAppId,
+          clientAppName: clientApp.clientAppName,
+          clientConfidence: 'exact' as const,
+        }
+        : {
+          clientAppId: 'codex',
+          clientAppName: 'Codex',
+          clientConfidence: 'heuristic' as const,
+        }),
     };
   },
 };

src/server/proxy-core/cliProfiles/geminiCliProfile.ts

@@ -32,6 +32,9 @@ export const geminiCliProfile: CliProfileDefinition = {
     if (input.body !== undefined && !hasGeminiCliBodyShape(input.body)) return null;
     return {
       id: 'gemini_cli',
+      clientAppId: 'gemini_cli',
+      clientAppName: 'Gemini CLI',
+      clientConfidence: 'exact',
     };
   },
 };

src/server/proxy-core/cliProfiles/registry.test.ts

@@ -14,6 +14,9 @@ describe('detectCliProfile', () => {
       id: 'codex',
       sessionId: 'codex-session-123',
       traceHint: 'codex-session-123',
+      clientAppId: 'codex_cli_rs',
+      clientAppName: 'Codex CLI',
+      clientConfidence: 'exact',
       capabilities: {
         supportsResponsesCompact: true,
         supportsResponsesWebsocketIncremental: true,
@@ -79,6 +82,9 @@ describe('detectCliProfile', () => {
       id: 'claude_code',
       sessionId: 'f25958b8-e75c-455d-8b40-f006d87cc2a4',
       traceHint: 'f25958b8-e75c-455d-8b40-f006d87cc2a4',
+      clientAppId: 'claude_code',
+      clientAppName: 'Claude Code',
+      clientConfidence: 'exact',
       capabilities: {
         supportsResponsesCompact: false,
         supportsResponsesWebsocketIncremental: false,
@@ -98,6 +104,9 @@ describe('detectCliProfile', () => {
       },
     })).toEqual({
       id: 'gemini_cli',
+      clientAppId: 'gemini_cli',
+      clientAppName: 'Gemini CLI',
+      clientConfidence: 'exact',
       capabilities: {
         supportsResponsesCompact: false,
         supportsResponsesWebsocketIncremental: false,

src/server/proxy-core/cliProfiles/types.ts

@@ -12,6 +12,8 @@ export type CliProfileCapabilities = {
   echoesTurnState: boolean;
 };
 
+export type CliProfileClientConfidence = 'exact' | 'heuristic';
+
 export type DetectCliProfileInput = {
   downstreamPath: string;
   headers?: Record<string, unknown>;
@@ -22,6 +24,9 @@ export type DetectedCliProfile = {
   id: CliProfileId;
   sessionId?: string;
   traceHint?: string;
+  clientAppId?: string;
+  clientAppName?: string;
+  clientConfidence?: CliProfileClientConfidence;
   capabilities: CliProfileCapabilities;
 };