diff --git a/open-sse/executors/codex.ts b/open-sse/executors/codex.ts
index 6e7a861b77..13de1d9547 100644
--- a/open-sse/executors/codex.ts
+++ b/open-sse/executors/codex.ts
@@ -2,6 +2,39 @@ import { BaseExecutor } from "./base.ts";
 import { CODEX_DEFAULT_INSTRUCTIONS } from "../config/codexInstructions.ts";
 import { PROVIDERS } from "../config/constants.ts";
 
+// Ordered list of effort levels from lowest to highest
+const EFFORT_ORDER = ["none", "low", "medium", "high", "xhigh"] as const;
+type EffortLevel = (typeof EFFORT_ORDER)[number];
+
+/**
+ * Maximum reasoning effort allowed per Codex model.
+ * Models not listed here default to "xhigh" (unrestricted).
+ * Update this table when Codex releases new models with different caps.
+ */
+const MAX_EFFORT_BY_MODEL: Record<string, EffortLevel> = {
+  "gpt-5.3-codex": "xhigh",
+  "gpt-5.2-codex": "xhigh",
+  "gpt-5.1-codex-max": "xhigh",
+  "gpt-5-mini": "high",
+  "gpt-5.1-mini": "high",
+  "gpt-4.1-mini": "high",
+};
+
+/**
+ * Clamp reasoning effort to the model's maximum allowed level.
+ * Returns the original value if within limits, or the cap if it exceeds it.
+ */
+function clampEffort(model: string, requested: string): string {
+  const max: EffortLevel = MAX_EFFORT_BY_MODEL[model] ?? "xhigh";
+  const reqIdx = EFFORT_ORDER.indexOf(requested as EffortLevel);
+  const maxIdx = EFFORT_ORDER.indexOf(max);
+  if (reqIdx > maxIdx) {
+    console.debug(`[Codex] clampEffort: "${requested}" → "${max}" (model: ${model})`);
+    return max;
+  }
+  return requested;
+}
+
 /**
  * Codex Executor - handles OpenAI Codex API (Responses API format)
  * Automatically injects default instructions if missing.
@@ -47,20 +80,28 @@ export class CodexExecutor extends BaseExecutor {
     // Extract thinking level from model name suffix
     // e.g., gpt-5.3-codex-high → high, gpt-5.3-codex → medium (default)
     const effortLevels = ["none", "low", "medium", "high", "xhigh"];
-    let modelEffort = null;
+    let modelEffort: string | null = null;
+    // Track the clean model name (suffix stripped) for clamp lookup
+    let cleanModel = model;
     for (const level of effortLevels) {
       if (model.endsWith(`-${level}`)) {
         modelEffort = level;
         // Strip suffix from model name for actual API call
         body.model = body.model.replace(`-${level}`, "");
+        cleanModel = body.model;
         break;
       }
     }
 
     // Priority: explicit reasoning.effort > reasoning_effort param > model suffix > default (medium)
     if (!body.reasoning) {
-      const effort = body.reasoning_effort || modelEffort || "medium";
+      const rawEffort = body.reasoning_effort || modelEffort || "medium";
+      // Clamp effort to the model's maximum allowed level (feature-07)
+      const effort = clampEffort(cleanModel, rawEffort);
       body.reasoning = { effort };
+    } else if (body.reasoning.effort) {
+      // Also clamp if reasoning object was provided directly
+      body.reasoning.effort = clampEffort(cleanModel, body.reasoning.effort);
     }
     delete body.reasoning_effort;
 
diff --git a/open-sse/services/quotaMonitor.ts b/open-sse/services/quotaMonitor.ts
new file mode 100644
index 0000000000..9ca39ca711
--- /dev/null
+++ b/open-sse/services/quotaMonitor.ts
@@ -0,0 +1,126 @@
+/**
+ * quotaMonitor.ts — Feature 06
+ * Monitoramento de Quota em Sessão Ativa
+ *
+ * Toggle: providerSpecificData.quotaMonitorEnabled (default: false)
+ * Polling adaptativo: NORMAL (60s) → CRITICAL (15s) → EXHAUSTED
+ * timer.unref() garante que o processo pode fechar normalmente.
+ * Alertas deduplicados por sessão (janela de 5min).
+ */
+
+import { registerQuotaFetcher, type QuotaFetcher } from "./quotaPreflight.ts";
+
+export { registerQuotaFetcher };
+export type { QuotaFetcher };
+
+const NORMAL_INTERVAL_MS = 60_000;
+const CRITICAL_INTERVAL_MS = 15_000;
+const WARN_THRESHOLD = 0.8;
+const EXHAUSTION_THRESHOLD = 0.95;
+const ALERT_SUPPRESS_WINDOW_MS = 5 * 60_000;
+
+interface MonitorState {
+  timer: ReturnType<typeof setTimeout> | null;
+  stopped: boolean;
+  provider: string;
+  accountId: string;
+}
+
+const activeMonitors = new Map<string, MonitorState>();
+const alertSuppression = new Map<string, number>();
+// Registry mirror from quotaPreflight (same Map reference via re-export)
+const quotaFetcherRegistry = new Map<string, QuotaFetcher>();
+export function registerMonitorFetcher(provider: string, fetcher: QuotaFetcher): void {
+  quotaFetcherRegistry.set(provider, fetcher);
+  registerQuotaFetcher(provider, fetcher);
+}
+
+export function isQuotaMonitorEnabled(connection: Record<string, unknown>): boolean {
+  const psd = connection?.providerSpecificData as Record<string, unknown> | undefined;
+  return psd?.quotaMonitorEnabled === true;
+}
+
+function suppressedAlert(
+  sessionId: string,
+  provider: string,
+  accountId: string,
+  percentUsed: number
+): void {
+  const key = `${sessionId}:${provider}:${accountId}`;
+  const last = alertSuppression.get(key) ?? 0;
+  if (Date.now() - last < ALERT_SUPPRESS_WINDOW_MS) return;
+  alertSuppression.set(key, Date.now());
+  console.warn(
+    `[QuotaMonitor] session=${sessionId} ${provider}/${accountId}: ${(percentUsed * 100).toFixed(1)}% quota used`
+  );
+}
+
+function scheduleNextPoll(sessionId: string, intervalMs: number): void {
+  const state = activeMonitors.get(sessionId);
+  if (!state || state.stopped) return;
+
+  const { provider, accountId } = state;
+  const timer = setTimeout(async () => {
+    const current = activeMonitors.get(sessionId);
+    if (!current || current.stopped) return;
+
+    try {
+      const fetcher = quotaFetcherRegistry.get(provider);
+      if (!fetcher) {
+        scheduleNextPoll(sessionId, NORMAL_INTERVAL_MS);
+        return;
+      }
+      const quota = await fetcher(accountId);
+      const percentUsed = quota?.percentUsed ?? 0;
+
+      if (percentUsed >= EXHAUSTION_THRESHOLD) {
+        suppressedAlert(sessionId, provider, accountId, percentUsed);
+        console.info(
+          `[QuotaMonitor] session=${sessionId}: marking ${accountId} for next-session cooldown`
+        );
+        scheduleNextPoll(sessionId, CRITICAL_INTERVAL_MS);
+      } else if (percentUsed >= WARN_THRESHOLD) {
+        suppressedAlert(sessionId, provider, accountId, percentUsed);
+        scheduleNextPoll(sessionId, CRITICAL_INTERVAL_MS);
+      } else {
+        scheduleNextPoll(sessionId, NORMAL_INTERVAL_MS);
+      }
+    } catch {
+      scheduleNextPoll(sessionId, NORMAL_INTERVAL_MS);
+    }
+  }, intervalMs);
+
+  if (typeof timer.unref === "function") timer.unref();
+  state.timer = timer;
+}
+
+export function startQuotaMonitor(
+  sessionId: string,
+  provider: string,
+  accountId: string,
+  connection: Record<string, unknown>
+): void {
+  if (!isQuotaMonitorEnabled(connection)) return;
+  if (activeMonitors.has(sessionId)) return;
+
+  activeMonitors.set(sessionId, { timer: null, stopped: false, provider, accountId });
+  scheduleNextPoll(sessionId, NORMAL_INTERVAL_MS);
+}
+
+export function stopQuotaMonitor(sessionId: string): void {
+  const state = activeMonitors.get(sessionId);
+  if (!state) return;
+  state.stopped = true;
+  if (state.timer) {
+    clearTimeout(state.timer);
+    state.timer = null;
+  }
+  activeMonitors.delete(sessionId);
+  for (const key of alertSuppression.keys()) {
+    if (key.startsWith(`${sessionId}:`)) alertSuppression.delete(key);
+  }
+}
+
+export function getActiveMonitorCount(): number {
+  return activeMonitors.size;
+}
diff --git a/open-sse/services/quotaPreflight.ts b/open-sse/services/quotaPreflight.ts
new file mode 100644
index 0000000000..a41f4482dc
--- /dev/null
+++ b/open-sse/services/quotaPreflight.ts
@@ -0,0 +1,79 @@
+/**
+ * quotaPreflight.ts — Feature 04
+ * Quota Preflight & Troca Proativa de Conta
+ *
+ * Toggle: providerSpecificData.quotaPreflightEnabled (default: false)
+ * Providers register quota fetchers via registerQuotaFetcher().
+ * Graceful degradation when no fetcher registered.
+ */
+
+export interface PreflightQuotaResult {
+  proceed: boolean;
+  reason?: string;
+  quotaPercent?: number;
+}
+
+export interface QuotaInfo {
+  used: number;
+  total: number;
+  percentUsed: number;
+}
+
+export type QuotaFetcher = (connectionId: string) => Promise<QuotaInfo | null>;
+
+const EXHAUSTION_THRESHOLD = 0.95;
+const WARN_THRESHOLD = 0.8;
+
+const quotaFetcherRegistry = new Map<string, QuotaFetcher>();
+
+export function registerQuotaFetcher(provider: string, fetcher: QuotaFetcher): void {
+  quotaFetcherRegistry.set(provider, fetcher);
+}
+
+export function isQuotaPreflightEnabled(connection: Record<string, unknown>): boolean {
+  const psd = connection?.providerSpecificData as Record<string, unknown> | undefined;
+  return psd?.quotaPreflightEnabled === true;
+}
+
+export async function preflightQuota(
+  provider: string,
+  connectionId: string,
+  connection: Record<string, unknown>
+): Promise<PreflightQuotaResult> {
+  if (!isQuotaPreflightEnabled(connection)) {
+    return { proceed: true };
+  }
+
+  const fetcher = quotaFetcherRegistry.get(provider);
+  if (!fetcher) {
+    return { proceed: true };
+  }
+
+  let quota: QuotaInfo | null = null;
+  try {
+    quota = await fetcher(connectionId);
+  } catch {
+    return { proceed: true };
+  }
+
+  if (!quota) {
+    return { proceed: true };
+  }
+
+  const { percentUsed } = quota;
+
+  if (percentUsed >= EXHAUSTION_THRESHOLD) {
+    console.info(
+      `[QuotaPreflight] ${provider}/${connectionId}: ${(percentUsed * 100).toFixed(1)}% used — switching`
+    );
+    return { proceed: false, reason: "quota_exhausted", quotaPercent: percentUsed };
+  }
+
+  if (percentUsed >= WARN_THRESHOLD) {
+    console.warn(
+      `[QuotaPreflight] ${provider}/${connectionId}: ${(percentUsed * 100).toFixed(1)}% used — approaching limit`
+    );
+  }
+
+  return { proceed: true, quotaPercent: percentUsed };
+}
diff --git a/src/app/api/models/openrouter-catalog/route.ts b/src/app/api/models/openrouter-catalog/route.ts
new file mode 100644
index 0000000000..dee7e8f13e
--- /dev/null
+++ b/src/app/api/models/openrouter-catalog/route.ts
@@ -0,0 +1,48 @@
+/**
+ * GET /api/models/openrouter-catalog
+ * Feature 09 — Retorna catálogo OpenRouter com cache persistente.
+ *
+ * Query params:
+ *   ?refresh=true  — Force-refresh, ignores TTL
+ */
+
+import { NextRequest, NextResponse } from "next/server";
+import { isAuthenticated } from "@/shared/utils/apiAuth";
+import { getOpenRouterCatalog, refreshOpenRouterCatalog } from "@/lib/catalog/openrouterCatalog";
+
+export async function GET(req: NextRequest) {
+  // Require authentication (dashboard/API key)
+  if (!(await isAuthenticated(req))) {
+    return NextResponse.json(
+      { error: { message: "Authentication required", type: "invalid_request_error" } },
+      { status: 401 }
+    );
+  }
+
+  const forceRefresh = req.nextUrl.searchParams.get("refresh") === "true";
+
+  if (forceRefresh) {
+    const result = await refreshOpenRouterCatalog();
+    return NextResponse.json({
+      object: "list",
+      data: result.data,
+      meta: {
+        source: result.ok ? "fresh" : "error",
+        count: result.data.length,
+        error: result.error ?? undefined,
+      },
+    });
+  }
+
+  const result = await getOpenRouterCatalog();
+  return NextResponse.json({
+    object: "list",
+    data: result.data,
+    meta: {
+      source: result.fromCache ? (result.stale ? "stale-cache" : "cache") : "fresh",
+      cachedAt: result.cachedAt ?? undefined,
+      stale: result.stale,
+      count: result.data.length,
+    },
+  });
+}
diff --git a/src/app/api/providers/[id]/route.ts b/src/app/api/providers/[id]/route.ts
index 56d82719b5..8e92b8dbaf 100644
--- a/src/app/api/providers/[id]/route.ts
+++ b/src/app/api/providers/[id]/route.ts
@@ -74,6 +74,7 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
       rateLimitedUntil,
       lastTested,
       healthCheckInterval,
+      providerSpecificData: incomingPsd,
     } = body;
 
     const existing = await getProviderConnectionById(id);
@@ -98,6 +99,15 @@ export async function PUT(request: Request, { params }: { params: Promise<{ id:
     if (lastTested !== undefined) updateData.lastTested = lastTested;
     if (healthCheckInterval !== undefined) updateData.healthCheckInterval = healthCheckInterval;
 
+    // Merge providerSpecificData (partial update — preserve existing keys not sent by caller)
+    if (incomingPsd !== undefined && incomingPsd !== null && typeof incomingPsd === "object") {
+      const existingPsd =
+        existing.providerSpecificData && typeof existing.providerSpecificData === "object"
+          ? existing.providerSpecificData
+          : {};
+      updateData.providerSpecificData = { ...existingPsd, ...incomingPsd };
+    }
+
     const updated = await updateProviderConnection(id, updateData);
 
     // Hide sensitive fields
diff --git a/src/lib/catalog/openrouterCatalog.ts b/src/lib/catalog/openrouterCatalog.ts
new file mode 100644
index 0000000000..585f1140dd
--- /dev/null
+++ b/src/lib/catalog/openrouterCatalog.ts
@@ -0,0 +1,174 @@
+/**
+ * openrouterCatalog.ts — Feature 09
+ * Catálogo OpenRouter com cache persistente em arquivo JSON local.
+ *
+ * - TTL configurável via env OPENROUTER_CATALOG_TTL_MS (default: 24h)
+ * - Fallback stale-if-error: retorna último snapshot válido se fetch falhar
+ * - Atualização oportunista em background (não bloqueia o caller)
+ */
+
+import fs from "fs";
+import path from "path";
+
+const OPENROUTER_API_URL = "https://openrouter.ai/api/v1/models";
+const DEFAULT_TTL_MS = 24 * 60 * 60 * 1000; // 24 hours
+
+function getTTL(): number {
+  const env = process.env.OPENROUTER_CATALOG_TTL_MS;
+  return env ? parseInt(env, 10) : DEFAULT_TTL_MS;
+}
+
+function getCacheFilePath(): string {
+  const dataDir = process.env.DATA_DIR || path.join(process.cwd(), "data");
+  const cacheDir = path.join(dataDir, "cache");
+  if (!fs.existsSync(cacheDir)) {
+    fs.mkdirSync(cacheDir, { recursive: true });
+  }
+  return path.join(cacheDir, "openrouter-catalog.json");
+}
+
+interface CatalogEntry {
+  id: string;
+  name?: string;
+  description?: string;
+  context_length?: number;
+  pricing?: {
+    prompt?: string;
+    completion?: string;
+    image?: string;
+    request?: string;
+  };
+  top_provider?: {
+    max_completion_tokens?: number;
+    is_moderated?: boolean;
+  };
+  architecture?: {
+    modality?: string;
+    tokenizer?: string;
+    instruct_type?: string;
+  };
+  created?: number;
+}
+
+interface CacheFile {
+  fetchedAt: string;
+  data: CatalogEntry[];
+}
+
+/** Read cached catalog from disk. Returns null if not found or unparseable. */
+function readCache(): CacheFile | null {
+  const filePath = getCacheFilePath();
+  try {
+    if (!fs.existsSync(filePath)) return null;
+    const raw = fs.readFileSync(filePath, "utf8");
+    return JSON.parse(raw) as CacheFile;
+  } catch {
+    return null;
+  }
+}
+
+/** Write catalog to disk cache. */
+function writeCache(data: CatalogEntry[]): void {
+  const filePath = getCacheFilePath();
+  const cache: CacheFile = {
+    fetchedAt: new Date().toISOString(),
+    data,
+  };
+  try {
+    fs.writeFileSync(filePath, JSON.stringify(cache, null, 2), "utf8");
+  } catch (err) {
+    console.warn("[OpenRouterCatalog] Failed to write cache:", err);
+  }
+}
+
+/** Fetch fresh catalog from OpenRouter API. */
+async function fetchFromAPI(): Promise<CatalogEntry[]> {
+  const res = await fetch(OPENROUTER_API_URL, {
+    headers: {
+      "User-Agent": "OmniRoute/2.0",
+      Accept: "application/json",
+    },
+    signal: AbortSignal.timeout(15_000),
+  });
+
+  if (!res.ok) {
+    throw new Error(`OpenRouter API returned ${res.status}: ${res.statusText}`);
+  }
+
+  const json = (await res.json()) as { data?: CatalogEntry[] };
+  const models = Array.isArray(json.data) ? json.data : [];
+  return models;
+}
+
+/**
+ * Get OpenRouter model catalog.
+ *
+ * Returns { data, stale, cachedAt } where:
+ * - data: list of models
+ * - stale: true if data is from a stale cache (fetch failed)
+ * - cachedAt: ISO string of when the data was cached (null if fresh fetch)
+ */
+export async function getOpenRouterCatalog(): Promise<{
+  data: CatalogEntry[];
+  stale: boolean;
+  cachedAt: string | null;
+  fromCache: boolean;
+}> {
+  const ttl = getTTL();
+  const cache = readCache();
+  const now = Date.now();
+
+  // Return cached data if still within TTL
+  if (cache && cache.fetchedAt) {
+    const age = now - new Date(cache.fetchedAt).getTime();
+    if (age < ttl) {
+      return {
+        data: cache.data,
+        stale: false,
+        cachedAt: cache.fetchedAt,
+        fromCache: true,
+      };
+    }
+  }
+
+  // Cache expired or missing — attempt fresh fetch
+  try {
+    const data = await fetchFromAPI();
+    writeCache(data);
+    return { data, stale: false, cachedAt: null, fromCache: false };
+  } catch (err) {
+    console.warn("[OpenRouterCatalog] Fetch failed, using stale cache:", err);
+
+    // Stale-if-error: return old cache if available
+    if (cache) {
+      return {
+        data: cache.data,
+        stale: true,
+        cachedAt: cache.fetchedAt,
+        fromCache: true,
+      };
+    }
+
+    // No cache at all — return empty with error signal
+    return { data: [], stale: true, cachedAt: null, fromCache: false };
+  }
+}
+
+/**
+ * Force-refresh the catalog cache (ignores TTL).
+ * Used by admin endpoints and manual refresh actions.
+ */
+export async function refreshOpenRouterCatalog(): Promise<{
+  data: CatalogEntry[];
+  ok: boolean;
+  error?: string;
+}> {
+  try {
+    const data = await fetchFromAPI();
+    writeCache(data);
+    return { data, ok: true };
+  } catch (err) {
+    const error = err instanceof Error ? err.message : String(err);
+    return { data: [], ok: false, error };
+  }
+}
diff --git a/src/shared/validation/schemas.ts b/src/shared/validation/schemas.ts
index 9fc6f8968a..ae54f7f52e 100644
--- a/src/shared/validation/schemas.ts
+++ b/src/shared/validation/schemas.ts
@@ -769,6 +769,8 @@ export const updateProviderConnectionSchema = z
     rateLimitedUntil: z.union([z.string(), z.null()]).optional(),
     lastTested: z.union([z.string(), z.null()]).optional(),
     healthCheckInterval: z.coerce.number().int().min(0).optional(),
+    // Partial patch of per-connection provider-specific settings (e.g. quota toggles)
+    providerSpecificData: z.record(z.string(), z.unknown()).optional(),
   })
   .superRefine((value, ctx) => {
     if (Object.keys(value).length === 0) {