v2.6.0: Usage Dashboard, per-provider tracking, OAuth file picker

- Usage Dashboard: visual cards with success rate bars, token stats, latency
- Per-model breakdown and error tracking per provider
- Proxy records usage-stats.json after every request
- Google OAuth: browse for client_secret.json instead of fixed path
- Auto-copies selected file to ~/.cache/codex-proxy/

CHANGELOG.md

@@ -1,5 +1,19 @@
 # Changelog
 
+## v2.6.0 (2026-05-20)
+
+- **Usage Dashboard** — per-provider tracking with visual cards
+  - Request counts, success/failure rates, token usage, latency stats
+  - Color-coded success rate bars (green/yellow/red)
+  - Per-model breakdown showing request counts
+  - Last error and last used timestamp
+  - Sorted by most-used provider
+  - Refresh button for live updates
+- **Proxy usage tracking** — records every request to `usage-stats.json`
+- **Google OAuth**: browse for `client_secret.json` with file picker dialog
+  - No longer requires copying to a specific path manually
+  - Auto-copies selected file to `~/.cache/codex-proxy/`
+
 ## v2.5.1 (2026-05-20)
 
 - **Adaptive retry for transient errors** (429/502/503)

src/codex-launcher-gui

@@ -25,6 +25,11 @@ model_catalog_json = ""
 """
 
 CHANGELOG = [
+    ("2.6.0", "2026-05-20", [
+        "Usage Dashboard — per-provider request/token/latency tracking",
+        "Visual cards with success rate bars, model breakdown, error tracking",
+        "Google OAuth: browse for client_secret.json instead of fixed path",
+    ]),
     ("2.5.1", "2026-05-20", [
         "Adaptive retry for 429/502/503 errors with exponential backoff",
         "BGP routes also retry transient errors before failing over",
@@ -635,12 +640,15 @@ class LauncherWin(Gtk.Window):
         # header row
         hdr = Gtk.Box(spacing=8)
         vbox.pack_start(hdr, False, False, 0)
-        lbl = Gtk.Label(label="<b>Codex Launcher v2.5.1</b>")
+        lbl = Gtk.Label(label="<b>Codex Launcher v2.6.0</b>")
         lbl.set_use_markup(True)
         hdr.pack_start(lbl, False, False, 0)
         changelog_btn = Gtk.Button(label="Changelog")
         changelog_btn.connect("clicked", lambda b: self._show_changelog())
         hdr.pack_end(changelog_btn, False, False, 0)
+        usage_btn = Gtk.Button(label="Usage")
+        usage_btn.connect("clicked", lambda b: self._open_usage())
+        hdr.pack_end(usage_btn, False, False, 0)
         bgp_btn = Gtk.Button(label="AI BGP")
         bgp_btn.connect("clicked", lambda b: self._open_bgp())
         hdr.pack_end(bgp_btn, False, False, 0)
@@ -942,6 +950,15 @@ class LauncherWin(Gtk.Window):
             d = Gtk.MessageDialog(self, 0, Gtk.MessageType.ERROR, Gtk.ButtonsType.OK, f"Error: {e}")
             d.run(); d.destroy()
 
+    def _open_usage(self):
+        try:
+            self._usage_window = UsageWindow(self)
+            self._usage_window.connect("destroy", lambda *_: setattr(self, "_usage_window", None))
+        except Exception as e:
+            import traceback; traceback.print_exc()
+            d = Gtk.MessageDialog(self, 0, Gtk.MessageType.ERROR, Gtk.ButtonsType.OK, f"Error: {e}")
+            d.run(); d.destroy()
+
     def _backup_profile(self):
         chooser = Gtk.FileChooserDialog(
             title="Backup Codex Profile",
@@ -1807,12 +1824,15 @@ class EditEndpointDialog(Gtk.Dialog):
 
     def _google_oauth_flow(self):
         token_path = os.path.expanduser("~/.cache/codex-proxy/google-oauth-token.json")
-        client_secret_path = os.path.expanduser("~/.cache/codex-proxy/client_secret.json")
+        default_cs_path = os.path.expanduser("~/.cache/codex-proxy/client_secret.json")
+        client_secret_path = None
 
-        if not os.path.exists(client_secret_path):
+        if os.path.exists(default_cs_path):
+            client_secret_path = default_cs_path
+        else:
             dlg = Gtk.Dialog(title="Google OAuth Setup", parent=self, modal=True)
             dlg.add_button("Open Google Console", 1)
-            dlg.add_button("I have client_secret.json", 2)
+            dlg.add_button("Browse for client_secret.json", 2)
             dlg.add_button("Cancel", Gtk.ResponseType.CANCEL)
             dlg.set_default_size(500, 320)
             area = dlg.get_content_area()
@@ -1828,9 +1848,9 @@ class EditEndpointDialog(Gtk.Dialog):
                 "2. APIs & Services → Credentials\n"
                 "   → Create OAuth 2.0 Client ID (Desktop app)\n"
                 "3. Add redirect URI:  http://localhost:8085\n"
-                "4. Download  client_secret.json\n"
-                f"5. Save to:  {client_secret_path}\n\n"
-                "Then click 'I have client_secret.json'"
+                "4. Download  client_secret.json\n\n"
+                "Then click 'Browse for client_secret.json'\n"
+                f"It will be auto-copied to: {default_cs_path}"
             ), xalign=0)
             area.pack_start(steps, False, False, 4)
             area.show_all()
@@ -1838,7 +1858,32 @@ class EditEndpointDialog(Gtk.Dialog):
             dlg.destroy()
             if r == 1:
                 subprocess.Popen(["xdg-open", "https://console.cloud.google.com/apis/credentials"])
-            return
+                return
+            if r == 2:
+                chooser = Gtk.FileChooserDialog(
+                    title="Select client_secret.json",
+                    parent=self,
+                    action=Gtk.FileChooserAction.OPEN,
+                )
+                chooser.add_button("Cancel", Gtk.ResponseType.CANCEL)
+                chooser.add_button("Open", Gtk.ResponseType.OK)
+                filt = Gtk.FileFilter()
+                filt.set_name("JSON files")
+                filt.add_pattern("*.json")
+                chooser.add_filter(filt)
+                chooser.set_current_folder(os.path.expanduser("~/Downloads"))
+                if chooser.run() == Gtk.ResponseType.OK:
+                    src = chooser.get_filename()
+                    chooser.destroy()
+                    if src and os.path.exists(src):
+                        import shutil as _shutil
+                        os.makedirs(os.path.dirname(default_cs_path), exist_ok=True)
+                        _shutil.copy2(src, default_cs_path)
+                        client_secret_path = default_cs_path
+                else:
+                    chooser.destroy()
+            if not client_secret_path:
+                return
 
         with open(client_secret_path) as f:
             cs = json.load(f)
@@ -2465,6 +2510,197 @@ class BGPRouteDialog(Gtk.Dialog):
                 self._combo_model.set_active(0)
 
 
+_USAGE_COLORS = {
+    "green": "#27ae60", "yellow": "#f39c12", "orange": "#e67e22",
+    "red": "#e74c3c", "blue": "#3498db", "purple": "#9b59b6",
+    "dark": "#2c3e50", "light": "#ecf0f1", "mid": "#bdc3c7",
+}
+
+_USAGE_STATS_FILE = HOME / ".cache/codex-proxy/usage-stats.json"
+
+def _load_usage_stats():
+    try:
+        if _USAGE_STATS_FILE.exists():
+            return json.loads(_USAGE_STATS_FILE.read_text())
+    except Exception:
+        pass
+    return {"providers": {}, "updated": None}
+
+def _bar_color(pct):
+    if pct < 0.5:
+        return _USAGE_COLORS["green"]
+    if pct < 0.8:
+        return _USAGE_COLORS["yellow"]
+    return _USAGE_COLORS["red"]
+
+class UsageWindow(Gtk.Window):
+    def __init__(self, parent):
+        super().__init__(title="Usage Stats")
+        self.set_transient_for(parent)
+        self.set_default_size(640, 560)
+        self.set_position(Gtk.WindowPosition.CENTER)
+        self._parent = parent
+
+        vbox = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=0)
+        self.add(vbox)
+
+        header = Gtk.Box(spacing=8)
+        header.set_margin_start(16)
+        header.set_margin_end(16)
+        header.set_margin_top(12)
+        header.set_margin_bottom(8)
+        vbox.pack_start(header, False, False, 0)
+        title = Gtk.Label()
+        title.set_markup('<span font="14" weight="bold" foreground="#2c3e50">Usage Dashboard</span>')
+        header.pack_start(title, False, False, 0)
+        refresh_btn = Gtk.Button(label="Refresh")
+        refresh_btn.connect("clicked", lambda b: self._refresh())
+        header.pack_end(refresh_btn, False, False, 0)
+        self._updated_lbl = Gtk.Label()
+        self._updated_lbl.set_markup('<span foreground="#95a5a6" size="small">Never</span>')
+        header.pack_end(self._updated_lbl, False, False, 8)
+
+        sep = Gtk.Separator()
+        vbox.pack_start(sep, False, False, 0)
+
+        self._cards_box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=8)
+        sw = Gtk.ScrolledWindow()
+        sw.set_policy(Gtk.PolicyType.NEVER, Gtk.PolicyType.AUTOMATIC)
+        sw.add(self._cards_box)
+        vbox.pack_start(sw, True, True, 0)
+
+        self._refresh()
+        self.show_all()
+
+    def _refresh(self):
+        for c in self._cards_box.get_children():
+            self._cards_box.remove(c)
+        stats = _load_usage_stats()
+        updated = stats.get("updated")
+        if updated:
+            self._updated_lbl.set_markup(f'<span foreground="#95a5a6" size="small">Updated: {updated}</span>')
+        providers = stats.get("providers", {})
+        if not providers:
+            empty = Gtk.Label()
+            empty.set_markup('<span foreground="#95a5a6" size="large">No usage data yet.\nLaunch a session to start tracking.</span>')
+            empty.set_margin_top(60)
+            self._cards_box.pack_start(empty, False, False, 0)
+            self._cards_box.show_all()
+            return
+
+        sorted_providers = sorted(providers.items(), key=lambda x: x[1].get("total_requests", 0), reverse=True)
+        for prov_name, prov_data in sorted_providers:
+            card = self._build_card(prov_name, prov_data)
+            self._cards_box.pack_start(card, False, False, 0)
+        self._cards_box.show_all()
+
+    def _build_card(self, name, data):
+        frame = Gtk.Frame()
+        frame.set_margin_start(12)
+        frame.set_margin_end(12)
+        frame.set_margin_top(4)
+        frame.set_margin_bottom(4)
+        style = frame.get_style_context()
+        style.add_class("card")
+
+        outer = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=4)
+        outer.set_margin_start(12)
+        outer.set_margin_end(12)
+        outer.set_margin_top(8)
+        outer.set_margin_bottom(8)
+        frame.add(outer)
+
+        top_row = Gtk.Box(spacing=8)
+        outer.pack_start(top_row, False, False, 0)
+
+        total = data.get("total_requests", 0)
+        ok = data.get("successes", 0)
+        fail = data.get("failures", 0)
+        success_rate = ok / total if total > 0 else 1.0
+
+        name_lbl = Gtk.Label()
+        short = name.replace("https://", "").replace("http://", "").split("/")[0]
+        name_lbl.set_markup(f'<span weight="bold" foreground="#2c3e50" size="medium">{short}</span>')
+        top_row.pack_start(name_lbl, False, False, 0)
+
+        req_lbl = Gtk.Label()
+        req_lbl.set_markup(f'<span foreground="#7f8c8d" size="small">{total} requests</span>')
+        top_row.pack_start(req_lbl, False, False, 8)
+
+        if fail > 0:
+            err_lbl = Gtk.Label()
+            err_lbl.set_markup(f'<span foreground="{_USAGE_COLORS["red"]}" size="small">{fail} failed</span>')
+            top_row.pack_start(err_lbl, False, False, 4)
+
+        last_used = data.get("last_used", "")
+        if last_used:
+            lu_lbl = Gtk.Label()
+            lu_lbl.set_markup(f'<span foreground="#95a5a6" size="x-small">{last_used}</span>')
+            top_row.pack_end(lu_lbl, False, False, 0)
+
+        # Progress bar for success rate
+        bar = Gtk.ProgressBar()
+        bar.set_fraction(success_rate)
+        bar_pct = int(success_rate * 100)
+        bar.set_text(f"{bar_pct}% success")
+        bar.set_show_text(True)
+        bar.set_margin_top(2)
+        bar.set_margin_bottom(2)
+        color = _bar_color(1.0 - success_rate)
+        bar_css = f'progress {{ background-color: {color}; border-radius: 4px; }} trough {{ border-radius: 4px; min-height: 10px; }}'
+        provider = Gtk.CssProvider()
+        provider.load_from_data(bar_css.encode())
+        bar.get_style_context().add_provider(provider, Gtk.STYLE_PROVIDER_PRIORITY_USER)
+        outer.pack_start(bar, False, False, 0)
+
+        # Stats row
+        stats_row = Gtk.Box(spacing=16)
+        outer.pack_start(stats_row, False, False, 0)
+
+        t_in = data.get("total_tokens_in", 0)
+        t_out = data.get("total_tokens_out", 0)
+        dur = data.get("total_duration_s", 0.0)
+        avg_dur = dur / total if total > 0 else 0
+
+        for label, value in [
+            ("Tokens In", f"{t_in:,}"),
+            ("Tokens Out", f"{t_out:,}"),
+            ("Avg Latency", f"{avg_dur:.1f}s"),
+        ]:
+            box = Gtk.Box(orientation=Gtk.Orientation.VERTICAL, spacing=1)
+            l = Gtk.Label()
+            l.set_markup(f'<span foreground="#95a5a6" size="x-small">{label}</span>')
+            box.pack_start(l, False, False, 0)
+            v = Gtk.Label()
+            v.set_markup(f'<span weight="bold" foreground="#2c3e50" size="small">{value}</span>')
+            box.pack_start(v, False, False, 0)
+            stats_row.pack_start(box, False, False, 0)
+
+        # Models breakdown
+        models = data.get("models", {})
+        if len(models) > 0:
+            model_str = "  ".join(
+                f'<span foreground="#3498db" size="x-small">{m}</span> '
+                f'<span foreground="#7f8c8d" size="x-small">({md.get("requests",0)})</span>'
+                for m, md in sorted(models.items(), key=lambda x: x[1].get("requests", 0), reverse=True)[:4]
+            )
+            m_lbl = Gtk.Label()
+            m_lbl.set_markup(f'<span size="x-small">Models:</span> {model_str}')
+            m_lbl.set_line_wrap(True)
+            m_lbl.set_xalign(0)
+            outer.pack_start(m_lbl, False, False, 2)
+
+        # Error info
+        last_err = data.get("last_error")
+        if last_err:
+            err_lbl = Gtk.Label()
+            err_lbl.set_markup(f'<span foreground="{_USAGE_COLORS["red"]}" size="x-small">Last error: {last_err}</span>')
+            err_lbl.set_xalign(0)
+            outer.pack_start(err_lbl, False, False, 0)
+
+        return frame
+
+
 def main():
     for d in [LOG_DIR, PROXY_CONFIG_DIR]:
         d.mkdir(parents=True, exist_ok=True)

src/translate-proxy.py

@@ -141,6 +141,43 @@ _pool = uuid.uuid4().hex[:8]
 _response_store = {}
 _MAX_STORED = 50
 
+_stats_path = os.path.join(_LOG_DIR, "usage-stats.json")
+_stats_lock = threading.Lock()
+
+def _load_stats():
+    try:
+        if os.path.exists(_stats_path):
+            return json.load(open(_stats_path))
+    except Exception:
+        pass
+    return {"providers": {}, "updated": None}
+
+def _record_usage(provider, model, success, duration_s, tokens_in=0, tokens_out=0, error_type=None):
+    with _stats_lock:
+        stats = _load_stats()
+        p = stats["providers"].setdefault(provider, {
+            "total_requests": 0, "successes": 0, "failures": 0,
+            "total_tokens_in": 0, "total_tokens_out": 0,
+            "total_duration_s": 0.0, "models": {}, "last_used": None, "last_error": None,
+        })
+        p["total_requests"] += 1
+        p["total_tokens_in"] += tokens_in
+        p["total_tokens_out"] += tokens_out
+        p["total_duration_s"] += duration_s
+        p["last_used"] = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
+        if success:
+            p["successes"] += 1
+        else:
+            p["failures"] += 1
+            p["last_error"] = error_type or "unknown"
+        m = p["models"].setdefault(model, {"requests": 0, "tokens_in": 0, "tokens_out": 0})
+        m["requests"] += 1
+        m["tokens_in"] += tokens_in
+        m["tokens_out"] += tokens_out
+        stats["updated"] = time.strftime("%Y-%m-%dT%H:%M:%SZ", time.gmtime())
+        with open(_stats_path, "w") as f:
+            json.dump(stats, f, indent=2)
+
 def store_response(resp_id, input_data, output_items):
     if not resp_id:
         return
@@ -1161,6 +1198,10 @@ class Handler(http.server.BaseHTTPRequestHandler):
 
     def _forward_oa_compat(self, upstream, stream, model, chat_body, body, input_data, fwd, target):
         n_items = len(input_data) if isinstance(input_data, list) else 1
+        t0 = time.time()
+        provider = TARGET_URL.split("//")[-1].split("/")[0]
+        if BGP_ROUTES:
+            provider = "bgp:" + (BGP_ROUTES[0].get("name", "pool") if BGP_ROUTES else "unknown")
 
         if stream:
             self.send_response(200)
@@ -1205,6 +1246,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             _log_resp(last_resp_id, last_status, last_output)
             if last_resp_id and input_data is not None:
                 store_response(last_resp_id, input_data, last_output)
+            _record_usage(provider, model, success, time.time() - t0, error_type="length" if not success else None)
 
             # Auto-retry on finish_reason=length with no content
             if finish_reason == "length" and not has_content and isinstance(input_data, list) and len(input_data) > 5:
@@ -1234,6 +1276,7 @@ class Handler(http.server.BaseHTTPRequestHandler):
             _log_resp(rid, result.get("status"), result.get("output", []))
             if rid and input_data is not None:
                 store_response(rid, input_data, result.get("output", []))
+            _record_usage(provider, model, success, time.time() - t0)
 
     def _forward_oa_compat_retry(self, req, model, chat_body, body, input_data):
         try: