diff --git a/changelog/unreleased/upstream-qoder-codex-align.md b/changelog/unreleased/upstream-qoder-codex-align.md
new file mode 100644
index 00000000..3e4aeb55
--- /dev/null
+++ b/changelog/unreleased/upstream-qoder-codex-align.md
@@ -0,0 +1,11 @@
+### English
+
+- Align Qoder Cosy fingerprint with hub v1.7.3: CLI 1.1.75, desktop Cosy-Version 0.4.8, undici User-Agent, business/scene/clientip headers, lowercase `agree` data-policy; machineos on all COSY requests, hostname SSE-only.
+- Bump Codex outbound cloaking User-Agent to official stable `0.164.0`.
+- Pass through inbound `X-Codex-Turn-Metadata`, `X-Codex-Turn-State`, and `X-Codex-Window-Id` on Codex OAuth (non-SIWC) upstream requests, matching CLIProxyAPI’s narrow EnsureHeader set.
+
+### 中文
+
+- Qoder Cosy 指纹对齐 hub v1.7.3：CLI 1.1.75、桌面签到 Cosy-Version 0.4.8、undici User-Agent、business/scene/clientip 头、data-policy 小写 `agree`；machineos 全 COSY 请求携带，hostname 仅 SSE。
+- Codex 出站伪装 User-Agent 升至官方稳定版 `0.164.0`。
+- Codex OAuth（非 SIWC）上游透传入站 `X-Codex-Turn-Metadata` / `X-Codex-Turn-State` / `X-Codex-Window-Id`，范围与 CLIProxyAPI EnsureHeader 一致、不扩大。
diff --git a/internal/executor/client_ua.go b/internal/executor/client_ua.go
index 415cd8ee..ce9654b3 100644
--- a/internal/executor/client_ua.go
+++ b/internal/executor/client_ua.go
@@ -2,6 +2,7 @@ package executor
 
 import (
 	"context"
+	"net/http"
 
 	"github.com/caigee-cmd/cli2api/internal/providers"
 )
@@ -15,3 +16,14 @@ func WithClientUserAgent(ctx context.Context, ua string) context.Context {
 func ClientUserAgentFromContext(ctx context.Context) string {
 	return providers.ClientUserAgentFromContext(ctx)
 }
+
+// WithCodexClientHeaders records inbound Codex turn/window headers for the
+// Codex provider to pass through on OAuth (non-SIWC) upstream requests.
+func WithCodexClientHeaders(ctx context.Context, h http.Header) context.Context {
+	return providers.WithCodexClientHeaders(ctx, h)
+}
+
+// CodexClientHeadersFromContext returns inbound Codex passthrough headers.
+func CodexClientHeadersFromContext(ctx context.Context) http.Header {
+	return providers.CodexClientHeadersFromContext(ctx)
+}
diff --git a/internal/gateway/prepare.go b/internal/gateway/prepare.go
index cbf4a8ce..ca802ef7 100644
--- a/internal/gateway/prepare.go
+++ b/internal/gateway/prepare.go
@@ -51,6 +51,7 @@ func (h *Handler) prepareExecution(r *http.Request, request translate.ChatReques
 		sessionHeader = r.Header.Get("X-CLI2API-Session")
 		prefer = h.requestedAccount(r)
 		ctx = executor.WithClientUserAgent(r.Context(), r.Header.Get("User-Agent"))
+		ctx = executor.WithCodexClientHeaders(ctx, r.Header)
 	}
 	var logs executor.RequestStarter
 	if h != nil && h.Logs != nil {
diff --git a/internal/providers/codex/client.go b/internal/providers/codex/client.go
index 8fb7c2ff..a68bdadd 100644
--- a/internal/providers/codex/client.go
+++ b/internal/providers/codex/client.go
@@ -771,6 +771,7 @@ func (c *Client) chatRequest(ctx context.Context, credential Credential, req tra
 	SetChatHeaders(httpReq.Header, credential, sessionID, true)
 	if !credential.UsesChatGPT() {
 		applyCodexRequestHeaders(httpReq.Header, req.Model, usesResponsesLite(req.Model))
+		applyCodexPassthroughHeaders(httpReq.Header, providers.CodexClientHeadersFromContext(ctx))
 	}
 	return httpReq, resolved, nil
 }
diff --git a/internal/providers/codex/credential.go b/internal/providers/codex/credential.go
index c0da9fb0..07d3899c 100644
--- a/internal/providers/codex/credential.go
+++ b/internal/providers/codex/credential.go
@@ -53,7 +53,7 @@ const (
 	pathWhamUsage = "/wham/usage"
 
 	// Cloaking: upstream gates on the official codex CLI UA/originator.
-	UserAgent  = "codex-tui/0.154.0 (Mac OS 26.5.2; arm64) iTerm.app/3.6.11 (codex-tui; 0.154.0)"
+	UserAgent  = "codex-tui/0.164.0 (Mac OS 26.5.2; arm64) iTerm.app/3.6.11 (codex-tui; 0.164.0)"
 	Originator = "codex-tui"
 
 	QuotaUnit = "rate_limit_window"
diff --git a/internal/providers/codex/headers.go b/internal/providers/codex/headers.go
index b346803b..87bff896 100644
--- a/internal/providers/codex/headers.go
+++ b/internal/providers/codex/headers.go
@@ -3,6 +3,8 @@ package codex
 import (
 	"net/http"
 	"strings"
+
+	"github.com/caigee-cmd/cli2api/internal/providers"
 )
 
 // SetChatHeaders applies the upstream headers the ChatGPT codex backend expects.
@@ -59,3 +61,17 @@ func applyCodexRequestHeaders(h http.Header, model string, lite bool) {
 		h.Set(codexResponsesLiteHeader, "true")
 	}
 }
+
+// applyCodexPassthroughHeaders copies inbound turn/window headers onto the
+// upstream request (CLIProxyAPI EnsureHeader for Turn-Metadata/State/Window-Id).
+// Empty values are skipped. Do not call on the SIWC path.
+func applyCodexPassthroughHeaders(dst, src http.Header) {
+	if dst == nil || src == nil {
+		return
+	}
+	for _, name := range providers.CodexPassthroughHeaderNames {
+		if v := strings.TrimSpace(src.Get(name)); v != "" {
+			dst.Set(name, v)
+		}
+	}
+}
diff --git a/internal/providers/codex/headers_passthrough_test.go b/internal/providers/codex/headers_passthrough_test.go
new file mode 100644
index 00000000..8f2f68c0
--- /dev/null
+++ b/internal/providers/codex/headers_passthrough_test.go
@@ -0,0 +1,64 @@
+package codex
+
+import (
+	"net/http"
+	"strings"
+	"testing"
+
+	"github.com/caigee-cmd/cli2api/internal/providers"
+)
+
+func TestApplyCodexPassthroughHeaders(t *testing.T) {
+	src := http.Header{}
+	src.Set("X-Codex-Turn-State", " opaque-state ")
+	src.Set("X-Codex-Turn-Metadata", `{"turn_id":"t1"}`)
+	src.Set("X-Codex-Window-Id", "win-1")
+	src.Set("X-Codex-Routing-Hint", "must-not-passthrough")
+	src.Set("Authorization", "secret")
+
+	dst := http.Header{}
+	applyCodexPassthroughHeaders(dst, src)
+
+	if got := dst.Get("X-Codex-Turn-State"); got != "opaque-state" {
+		t.Fatalf("Turn-State=%q", got)
+	}
+	if got := dst.Get("X-Codex-Turn-Metadata"); got != `{"turn_id":"t1"}` {
+		t.Fatalf("Turn-Metadata=%q", got)
+	}
+	if got := dst.Get("X-Codex-Window-Id"); got != "win-1" {
+		t.Fatalf("Window-Id=%q", got)
+	}
+	if dst.Get("X-Codex-Routing-Hint") != "" || dst.Get("Authorization") != "" {
+		t.Fatal("must not widen passthrough scope")
+	}
+}
+
+func TestApplyCodexPassthroughHeadersSkipsEmpty(t *testing.T) {
+	dst := http.Header{}
+	applyCodexPassthroughHeaders(dst, http.Header{"X-Codex-Turn-State": {"  "}})
+	if dst.Get("X-Codex-Turn-State") != "" {
+		t.Fatal("blank values must be skipped")
+	}
+	applyCodexPassthroughHeaders(dst, nil)
+	applyCodexPassthroughHeaders(nil, http.Header{"X-Codex-Turn-State": {"x"}})
+}
+
+func TestWithCodexClientHeadersFilters(t *testing.T) {
+	src := http.Header{}
+	src.Set("X-Codex-Turn-State", "s")
+	src.Set("X-Other", "nope")
+	ctx := providers.WithCodexClientHeaders(nil, src)
+	got := providers.CodexClientHeadersFromContext(ctx)
+	if got.Get("X-Codex-Turn-State") != "s" || got.Get("X-Other") != "" {
+		t.Fatalf("got=%v", got)
+	}
+	if providers.CodexClientHeadersFromContext(nil) != nil {
+		t.Fatal("nil ctx")
+	}
+}
+
+func TestUserAgentPinnedToOfficialStable(t *testing.T) {
+	if !strings.Contains(UserAgent, "0.164.0") {
+		t.Fatalf("UserAgent=%q want 0.164.0", UserAgent)
+	}
+}
diff --git a/internal/providers/codex/native.go b/internal/providers/codex/native.go
index b9b05009..c86fe0ff 100644
--- a/internal/providers/codex/native.go
+++ b/internal/providers/codex/native.go
@@ -44,6 +44,7 @@ func (c *Client) ResponsesStream(ctx context.Context, accountID string, req *tra
 	SetChatHeaders(httpReq.Header, credential, sessionID, true)
 	if !credential.UsesChatGPT() {
 		applyCodexRequestHeaders(httpReq.Header, model, usesResponsesLite(model))
+		applyCodexPassthroughHeaders(httpReq.Header, providers.CodexClientHeadersFromContext(ctx))
 	}
 	client, err := c.httpClient(ctx, accountID)
 	if err != nil {
diff --git a/internal/providers/codex_headers.go b/internal/providers/codex_headers.go
new file mode 100644
index 00000000..798897a1
--- /dev/null
+++ b/internal/providers/codex_headers.go
@@ -0,0 +1,50 @@
+package providers
+
+import (
+	"context"
+	"net/http"
+	"strings"
+)
+
+type codexClientHeadersKey struct{}
+
+// CodexPassthroughHeaderNames are inbound headers CLIProxyAPI EnsureHeader
+// forwards onto ChatGPT Codex OAuth requests for turn continuity. Kept
+// narrow: Routing-Hint / Responses-Lite are set by the adapter itself;
+// Session-Id is managed locally; SIWC does not receive these.
+var CodexPassthroughHeaderNames = []string{
+	"X-Codex-Turn-Metadata",
+	"X-Codex-Turn-State",
+	"X-Codex-Window-Id",
+}
+
+// WithCodexClientHeaders records selected inbound Codex headers so the
+// Codex adapter can pass them through on non-SIWC upstream requests.
+func WithCodexClientHeaders(ctx context.Context, src http.Header) context.Context {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	if src == nil {
+		return ctx
+	}
+	out := http.Header{}
+	for _, name := range CodexPassthroughHeaderNames {
+		if v := strings.TrimSpace(src.Get(name)); v != "" {
+			out.Set(name, v)
+		}
+	}
+	if len(out) == 0 {
+		return ctx
+	}
+	return context.WithValue(ctx, codexClientHeadersKey{}, out)
+}
+
+// CodexClientHeadersFromContext returns the inbound Codex passthrough
+// headers set by WithCodexClientHeaders, or nil when unset.
+func CodexClientHeadersFromContext(ctx context.Context) http.Header {
+	if ctx == nil {
+		return nil
+	}
+	h, _ := ctx.Value(codexClientHeadersKey{}).(http.Header)
+	return h
+}
diff --git a/internal/providers/qoder/checkin.go b/internal/providers/qoder/checkin.go
index 01cf7dfd..43c79aab 100644
--- a/internal/providers/qoder/checkin.go
+++ b/internal/providers/qoder/checkin.go
@@ -140,7 +140,7 @@ func (b *Bridge) Checkin(ctx context.Context) (providers.CheckinResult, error) {
 		req.Header.Set("Content-Type", "application/json")
 		req.Header.Set("User-Agent", "Qoder")
 		req.Header.Set("Cosy-ClientType", "10")
-		req.Header.Set("Cosy-Version", "0.3.4")
+		req.Header.Set("Cosy-Version", qauth.DesktopCosyVersion)
 		req.Header.Set("Cosy-MachineId", machineID)
 		req.Header.Set("Cosy-MachineToken", machineToken)
 		req.Header.Set("Cosy-MachineType", machineType)
diff --git a/internal/providers/qoder/checkin_inprocess_test.go b/internal/providers/qoder/checkin_inprocess_test.go
index ad12c634..f7e04be0 100644
--- a/internal/providers/qoder/checkin_inprocess_test.go
+++ b/internal/providers/qoder/checkin_inprocess_test.go
@@ -105,8 +105,8 @@ func TestBridgeCheckinHappyPath(t *testing.T) {
 	if got := gotHeaders.Get("Cosy-ClientType"); got != "10" {
 		t.Fatalf("Cosy-ClientType = %q want 10", got)
 	}
-	if got := gotHeaders.Get("Cosy-Version"); got != "0.3.4" {
-		t.Fatalf("Cosy-Version = %q want 0.3.4", got)
+	if got := gotHeaders.Get("Cosy-Version"); got != "0.4.8" {
+		t.Fatalf("Cosy-Version = %q want 0.4.8", got)
 	}
 	for _, key := range []string{"Cosy-Machineid", "Cosy-Machinetoken", "Cosy-Machinetype", "Cosy-Machinecode"} {
 		if gotHeaders.Get(key) == "" {
diff --git a/internal/providers/qoder/cosy.go b/internal/providers/qoder/cosy.go
index 47bcb678..8442ffac 100644
--- a/internal/providers/qoder/cosy.go
+++ b/internal/providers/qoder/cosy.go
@@ -164,26 +164,30 @@ func (s *Session) Sign(body, rawURL string, now time.Time) (headers map[string]s
 	sum := md5.Sum([]byte(raw))
 	bearer := "Bearer COSY." + payload + "." + hex.EncodeToString(sum[:])
 	return map[string]string{
-		"Accept":            "text/event-stream",
-		"Authorization":     bearer,
-		"Cache-Control":     "no-cache",
-		"Content-Type":      "application/json",
-		"Cosy-ClientType":   "5",
-		"Cosy-Data-Policy":  "AGREE",
-		"Cosy-Date":         date,
-		"Cosy-Key":          s.cosyKey,
-		"Cosy-MachineId":    s.MachineID,
-		"Cosy-MachineToken": s.MachineToken,
-		"Cosy-MachineType":  s.MachineType,
-		"Cosy-User":         s.User.uid(),
-		"Cosy-Version":      COSYVersion,
-		"Login-Version":     "v2",
-		"Accept-Encoding":   "identity",
-		// Sign is only used for inference SSE (direct chat), where qodercli
-		// also sends machine OS/hostname.
-		"User-Agent":           qauth.UserAgentForURL(rawURL),
-		"Cosy-MachineOS":       qauth.CosyMachineOS,
-		"Cosy-MachineHostname": qauth.MachineHostname(s.User.uid()),
+		"Accept":                 "text/event-stream",
+		"Authorization":          bearer,
+		"Cache-Control":          "no-cache",
+		"Content-Type":           "application/json",
+		"Cosy-ClientType":        "5",
+		"Cosy-Data-Policy":       "agree",
+		"Cosy-Date":              date,
+		"Cosy-Key":               s.cosyKey,
+		"Cosy-MachineId":         s.MachineID,
+		"Cosy-MachineToken":      s.MachineToken,
+		"Cosy-MachineType":       s.MachineType,
+		"Cosy-User":              s.User.uid(),
+		"Cosy-Version":           COSYVersion,
+		"Login-Version":          "v2",
+		"Accept-Encoding":        "identity",
+		"Cosy-Business-Product":  "cli",
+		"Cosy-Business-Type":     "agent",
+		"Cosy-Scene":             "assistant",
+		"Cosy-Clientip":          qauth.CosyClientIP,
+		// Inference SSE: undici UA + machine OS always; hostname SSE-only
+		// (applyClientFingerprint mirrors this on the bearer path).
+		"User-Agent":             qauth.CosyUserAgent,
+		"Cosy-MachineOS":         qauth.CosyMachineOS,
+		"Cosy-MachineHostname":   qauth.MachineHostname(s.User.uid()),
 	}, nil
 }
 
diff --git a/internal/providers/qoder/fingerprint_test.go b/internal/providers/qoder/fingerprint_test.go
index 880fc366..19e2a7a7 100644
--- a/internal/providers/qoder/fingerprint_test.go
+++ b/internal/providers/qoder/fingerprint_test.go
@@ -15,16 +15,23 @@ func TestDirectSignCarriesClientFingerprint(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	for _, tc := range []struct{ region, ua string }{{"global", "Qoder/"}, {"cn", "QoderWork/"}} {
-		h, err := s.Sign("b", ChatEndpoint(tc.region), time.Unix(1, 0))
+	for _, region := range []string{"global", "cn"} {
+		h, err := s.Sign("b", ChatEndpoint(region), time.Unix(1, 0))
 		if err != nil {
 			t.Fatal(err)
 		}
-		if h["User-Agent"] != tc.ua+qauth.CosyVersion || h["Cosy-Version"] != qauth.CosyVersion {
-			t.Fatalf("%s ua=%q ver=%q", tc.region, h["User-Agent"], h["Cosy-Version"])
+		if h["User-Agent"] != qauth.CosyUserAgent || h["Cosy-Version"] != qauth.CosyVersion {
+			t.Fatalf("%s ua=%q ver=%q", region, h["User-Agent"], h["Cosy-Version"])
+		}
+		if h["Cosy-Data-Policy"] != "agree" {
+			t.Fatalf("%s data-policy=%q", region, h["Cosy-Data-Policy"])
+		}
+		if h["Cosy-Business-Product"] != "cli" || h["Cosy-Business-Type"] != "agent" ||
+			h["Cosy-Scene"] != "assistant" || h["Cosy-Clientip"] != qauth.CosyClientIP {
+			t.Fatalf("%s business headers incomplete: %+v", region, h)
 		}
 		if h["Cosy-MachineOS"] != qauth.CosyMachineOS || h["Cosy-MachineHostname"] != qauth.MachineHostname("uid-fp") {
-			t.Fatalf("%s os/host=%q/%q", tc.region, h["Cosy-MachineOS"], h["Cosy-MachineHostname"])
+			t.Fatalf("%s os/host=%q/%q", region, h["Cosy-MachineOS"], h["Cosy-MachineHostname"])
 		}
 	}
 }
diff --git a/internal/providers/qoder/qauth/fingerprint.go b/internal/providers/qoder/qauth/fingerprint.go
index 50035afa..37151cb0 100644
--- a/internal/providers/qoder/qauth/fingerprint.go
+++ b/internal/providers/qoder/qauth/fingerprint.go
@@ -10,32 +10,49 @@ import (
 
 // CosyVersion is the single client/protocol version cli2api presents to
 // Qoder: the cosy-version header, the bearer payload's cosyVersion, the chat
-// body version and the User-Agent all derive from it. It mirrors the pinned
-// qodercli build cli2api emulates (session_type "qodercli", product "cli").
-const CosyVersion = "1.1.32"
+// body version and the OpenAPI User-Agent all derive from it. It mirrors the
+// pinned qodercli build (1.1.75; hub PR #75 / v1.7.3).
+const CosyVersion = "1.1.75"
+
+// DesktopCosyVersion is the Cosy-Version the official desktop app sends on
+// campaign / check-in requests (hub desktop 0.4.8). Distinct from CosyVersion
+// (CLI / reasoning).
+const DesktopCosyVersion = "0.4.8"
+
+// CosyUserAgent is the User-Agent official qodercli 1.1.75 leaves unset so the
+// bundled undici fetch supplies its default ("undici").
+const CosyUserAgent = "undici"
 
 // CosyMachineOS mirrors qodercli's `${arch}_${platform}` value for a Linux
 // x86_64 host, which is how cli2api is deployed.
 const CosyMachineOS = "x86_64_linux"
 
-// User-Agent product names per edition. The China edition ships as
-// QoderWork, the international edition as Qoder.
-const (
-	userAgentProductCN     = "QoderWork"
-	userAgentProductGlobal = "Qoder"
-)
+// CosyClientIP is the link-local address official qodercli puts in
+// cosy-clientip on outbound COSY requests.
+const CosyClientIP = "169.254.198.161"
 
-// UserAgent returns the edition-specific User-Agent. Anything that is not the
-// international region is treated as the China edition (the default region).
+// applyCosyBusinessHeaders adds the business / scene / client-ip headers
+// qodercli 1.1.75 sends on every COSY request.
+func applyCosyBusinessHeaders(h http.Header) {
+	h.Set("cosy-business-product", "cli")
+	h.Set("cosy-business-type", "agent")
+	h.Set("cosy-scene", "assistant")
+	h.Set("cosy-clientip", CosyClientIP)
+}
+
+// UserAgent returns the COSY reasoning User-Agent. Official qodercli does not
+// set UA itself; undici supplies "undici". Edition no longer splits the UA
+// (hub PR #75). Region is accepted for call-site compatibility.
 func UserAgent(region *RegionConfig) string {
-	if region != nil && region.Name == Global.Name {
-		return userAgentProductGlobal + "/" + CosyVersion
-	}
-	return userAgentProductCN + "/" + CosyVersion
+	_ = region
+	return CosyUserAgent
 }
 
-// UserAgentForURL returns the edition User-Agent for a request URL.
-func UserAgentForURL(rawURL string) string { return UserAgent(regionForURL(rawURL)) }
+// UserAgentForURL returns the COSY User-Agent for a request URL.
+func UserAgentForURL(rawURL string) string {
+	_ = rawURL
+	return CosyUserAgent
+}
 
 // regionForURL infers the edition from a request URL's host.
 func regionForURL(rawURL string) *RegionConfig {
@@ -59,12 +76,14 @@ func MachineHostname(uid string) string {
 	return "DESKTOP-" + strings.ToUpper(hex.EncodeToString(sum[:])[:7])
 }
 
-// applyClientFingerprint sets the edition User-Agent and, on inference SSE
-// requests only (as qodercli does), cosy-machineos/cosy-machinehostname.
+// applyClientFingerprint sets the undici User-Agent, always sends
+// cosy-machineos (qodercli 1.1.75), and on inference SSE requests only also
+// sends cosy-machinehostname.
 func applyClientFingerprint(h http.Header, rawURL, uid string, inferSSE bool) {
-	h.Set("user-agent", UserAgentForURL(rawURL))
+	_ = rawURL
+	h.Set("user-agent", CosyUserAgent)
+	h.Set("cosy-machineos", CosyMachineOS)
 	if inferSSE {
-		h.Set("cosy-machineos", CosyMachineOS)
 		h.Set("cosy-machinehostname", MachineHostname(uid))
 	}
 }
diff --git a/internal/providers/qoder/qauth/fingerprint_test.go b/internal/providers/qoder/qauth/fingerprint_test.go
index d7ad25a9..4f4ca38f 100644
--- a/internal/providers/qoder/qauth/fingerprint_test.go
+++ b/internal/providers/qoder/qauth/fingerprint_test.go
@@ -9,20 +9,26 @@ import (
 	"testing"
 )
 
-func TestUserAgentSplitsByEdition(t *testing.T) {
-	if got := UserAgent(CN); got != "QoderWork/"+CosyVersion {
-		t.Fatalf("CN UA=%q", got)
+func TestUserAgentIsUndici(t *testing.T) {
+	if got := UserAgent(CN); got != CosyUserAgent {
+		t.Fatalf("CN UA=%q want %q", got, CosyUserAgent)
 	}
-	if got := UserAgent(Global); got != "Qoder/"+CosyVersion {
-		t.Fatalf("global UA=%q", got)
+	if got := UserAgent(Global); got != CosyUserAgent {
+		t.Fatalf("global UA=%q want %q", got, CosyUserAgent)
 	}
-	if UserAgentForURL("https://api1.qoder.sh/algo/x") != UserAgent(Global) ||
-		UserAgentForURL("https://gateway.qoder.com.cn/algo/x") != UserAgent(CN) {
-		t.Fatal("URL edition inference wrong")
+	if UserAgentForURL("https://api1.qoder.sh/algo/x") != CosyUserAgent ||
+		UserAgentForURL("https://gateway.qoder.com.cn/algo/x") != CosyUserAgent {
+		t.Fatal("URL UA must be undici for both editions")
 	}
 	if openAPIUserAgentVersion != CosyVersion {
 		t.Fatal("OpenAPI UA version must follow CosyVersion")
 	}
+	if CosyVersion != "1.1.75" {
+		t.Fatalf("CosyVersion=%q want 1.1.75", CosyVersion)
+	}
+	if DesktopCosyVersion != "0.4.8" {
+		t.Fatalf("DesktopCosyVersion=%q want 0.4.8", DesktopCosyVersion)
+	}
 }
 
 func TestMachineHostnameStablePerAccount(t *testing.T) {
@@ -53,18 +59,33 @@ func TestBearerHeadersFingerprint(t *testing.T) {
 	sess := newTestSession(t)
 
 	_, _ = CallGet(context.Background(), sess, srv.URL+"/algo/api/x")
-	if got.Get("Cosy-Version") != CosyVersion || strings.Contains(got.Get("User-Agent"), "Go-http-client") ||
-		got.Get("User-Agent") != UserAgent(CN) {
+	if got.Get("Cosy-Version") != CosyVersion || got.Get("User-Agent") != CosyUserAgent {
 		t.Fatalf("json headers: ver=%q ua=%q", got.Get("Cosy-Version"), got.Get("User-Agent"))
 	}
-	if got.Get("Cosy-MachineOS") != "" || got.Get("Cosy-MachineHostname") != "" {
-		t.Fatal("machine os/hostname must be SSE-only")
+	if got.Get("Cosy-Data-Policy") != "agree" {
+		t.Fatalf("data-policy=%q want agree", got.Get("Cosy-Data-Policy"))
+	}
+	if got.Get("Cosy-Business-Product") != "cli" || got.Get("Cosy-Business-Type") != "agent" ||
+		got.Get("Cosy-Scene") != "assistant" || got.Get("Cosy-Clientip") != CosyClientIP {
+		t.Fatalf("business headers missing: product=%q type=%q scene=%q ip=%q",
+			got.Get("Cosy-Business-Product"), got.Get("Cosy-Business-Type"),
+			got.Get("Cosy-Scene"), got.Get("Cosy-Clientip"))
+	}
+	// qodercli 1.1.75: machineos on all COSY requests; hostname SSE-only.
+	if got.Get("Cosy-MachineOS") != CosyMachineOS {
+		t.Fatalf("json Cosy-MachineOS=%q want %q", got.Get("Cosy-MachineOS"), CosyMachineOS)
+	}
+	if got.Get("Cosy-MachineHostname") != "" {
+		t.Fatal("machine hostname must be SSE-only")
 	}
 
 	_ = OpenStreamLines(context.Background(), sess, srv.URL+"/algo/api/chat", []byte(`{}`), nil, func(string) error { return nil })
 	if got.Get("Cosy-MachineOS") != CosyMachineOS || got.Get("Cosy-MachineHostname") != MachineHostname("uid-test") {
 		t.Fatalf("sse headers os=%q host=%q", got.Get("Cosy-MachineOS"), got.Get("Cosy-MachineHostname"))
 	}
+	if got.Get("User-Agent") != CosyUserAgent {
+		t.Fatalf("sse UA=%q", got.Get("User-Agent"))
+	}
 }
 
 func payloadJSON(t *testing.T, b64 string) string {
diff --git a/internal/providers/qoder/qauth/qauth.go b/internal/providers/qoder/qauth/qauth.go
index 7c5c6fe3..45c2fd72 100644
--- a/internal/providers/qoder/qauth/qauth.go
+++ b/internal/providers/qoder/qauth/qauth.go
@@ -1101,7 +1101,7 @@ func drainBody(body io.Reader) {
 
 func makeCommonHeaders(sess *SessionContext, date, bearer, accept string) http.Header {
 	h := http.Header{}
-	h.Set("cosy-data-policy", "AGREE")
+	h.Set("cosy-data-policy", "agree")
 	h.Set("content-type", "application/json")
 	h.Set("cosy-machinetype", sess.MachineType)
 	h.Set("cosy-clienttype", "5")
@@ -1115,6 +1115,7 @@ func makeCommonHeaders(sess *SessionContext, date, bearer, accept string) http.H
 	h.Set("cosy-machineid", sess.MachineID)
 	h.Set("cosy-machinetoken", sess.MachineToken)
 	h.Set("login-version", "v2")
+	applyCosyBusinessHeaders(h)
 	return h
 }