diff --git a/@omniroute/opencode-plugin/package.json b/@omniroute/opencode-plugin/package.json
index 848bca4b3a..f096226d79 100644
--- a/@omniroute/opencode-plugin/package.json
+++ b/@omniroute/opencode-plugin/package.json
@@ -23,7 +23,7 @@
   "scripts": {
     "build": "tsup",
     "clean": "rm -rf dist",
-    "test": "node --import tsx/esm --test tests/scaffold.test.ts tests/auth.test.ts tests/options-schema.test.ts tests/multi-instance.test.ts tests/fetch-interceptor.test.ts tests/provider.test.ts tests/gemini-sanitize.test.ts tests/combos.test.ts tests/config-shim.test.ts tests/features.test.ts tests/feature-defaults.test.ts tests/usable-combo.test.ts tests/disk-snapshot-perms.test.ts tests/fork-features.test.ts tests/auto-combo-context.test.ts tests/provider-id-routing.test.ts tests/management-read-token.test.ts tests/auto-sync.test.ts tests/model-allowlist.test.ts",
+    "test": "node --import tsx/esm --test tests/scaffold.test.ts tests/auth.test.ts tests/options-schema.test.ts tests/multi-instance.test.ts tests/fetch-interceptor.test.ts tests/provider.test.ts tests/gemini-sanitize.test.ts tests/combos.test.ts tests/config-shim.test.ts tests/features.test.ts tests/feature-defaults.test.ts tests/usable-combo.test.ts tests/disk-snapshot-perms.test.ts tests/fork-features.test.ts tests/auto-combo-context.test.ts tests/provider-id-routing.test.ts tests/management-read-token.test.ts tests/auto-sync.test.ts tests/model-allowlist.test.ts tests/log-level.test.ts",
     "prepublishOnly": "npm run clean && npm run build && npm test"
   },
   "keywords": [
diff --git a/@omniroute/opencode-plugin/src/index.ts b/@omniroute/opencode-plugin/src/index.ts
index ef07b3c112..09e3825676 100644
--- a/@omniroute/opencode-plugin/src/index.ts
+++ b/@omniroute/opencode-plugin/src/index.ts
@@ -57,7 +57,12 @@ import type { AuthHook, Config, Plugin, PluginOptions, ProviderHook } from "@ope
 import { tool } from "@opencode-ai/plugin";
 import type { Model as ModelV2 } from "@opencode-ai/sdk/v2";
 import { z } from "zod";
-import { logger as _logger, setLogLevel, type LogLevel as _LogLevel } from "./logger.js";
+import {
+  createLogger,
+  logger as _logger,
+  type Logger as _Logger,
+  type LogLevel as _LogLevel,
+} from "./logger.js";
 import {
   PROVIDER_TAG_SEPARATOR as _PROVIDER_TAG_SEPARATOR,
   shortProviderLabel as _shortProviderLabel,
@@ -717,6 +722,7 @@ export async function forceSyncOmniRouteModels(args: {
   compressionMetaFetcher?: OmniRouteCompressionMetaFetcher;
   providersFetcher?: OmniRouteProvidersFetcher;
   now?: () => number;
+  logger?: _Logger;
 }): Promise<{
   ok: boolean;
   count: number;
@@ -737,6 +743,11 @@ export async function forceSyncOmniRouteModels(args: {
   const compressionMetaFetcher =
     args.compressionMetaFetcher ?? defaultOmniRouteCompressionMetaFetcher;
   const providersFetcher = args.providersFetcher ?? defaultOmniRouteProvidersFetcher;
+  const logger =
+    args.logger ??
+    createLogger(
+      resolved.features?.startupDebug ? "debug" : (resolved.features?.logLevel ?? "warn")
+    );
   const features = resolved.features ?? {};
   const wantCombos = features.combos !== false;
   const wantAutoCombos = features.autoCombos !== false;
@@ -847,8 +858,8 @@ export async function forceSyncOmniRouteModels(args: {
       }
     }
 
-    console.warn(
-      `[omniroute-plugin] force sync ok providerId=${resolved.providerId} ` +
+    logger.info(
+      `force sync ok providerId=${resolved.providerId} ` +
         `models=${rawModels.length} combos=${rawCombos.length} ` +
         `clearedMemory=${clearedMemory + clearedAll} disk=${clearedDisk}`
     );
@@ -880,6 +891,7 @@ export async function forceSyncOmniRouteModels(args: {
 export function createOmniRouteSyncModelsTool(args: {
   resolved: ResolvedOmniRoutePluginOptions;
   cache: OmniRouteFetchCache;
+  logger?: _Logger;
 }): ReturnType<typeof tool> {
   const { resolved, cache } = args;
   return tool({
@@ -893,7 +905,7 @@ export function createOmniRouteSyncModelsTool(args: {
         .describe("Optional reason for the sync (logging only)"),
     },
     async execute(toolArgs) {
-      const result = await forceSyncOmniRouteModels({ resolved, cache });
+      const result = await forceSyncOmniRouteModels({ resolved, cache, logger: args.logger });
       const reason = toolArgs.reason ? ` reason=${toolArgs.reason}` : "";
       if (!result.ok) {
         return {
@@ -932,10 +944,16 @@ export function startOmniRouteAutoSync(args: {
   resolved: ResolvedOmniRoutePluginOptions;
   cache: OmniRouteFetchCache;
   intervalMs?: number;
+  logger?: _Logger;
 }): () => void {
   const resolved = args.resolved;
   const cache = args.cache;
   const intervalMs = args.intervalMs ?? resolved.autoSyncIntervalMs;
+  const logger =
+    args.logger ??
+    createLogger(
+      resolved.features?.startupDebug ? "debug" : (resolved.features?.logLevel ?? "warn")
+    );
   if (!intervalMs || intervalMs <= 0) {
     return () => {};
   }
@@ -948,11 +966,9 @@ export function startOmniRouteAutoSync(args: {
     if (stopped) return;
     if (inFlight) return;
     inFlight = (async () => {
-      const result = await forceSyncOmniRouteModels({ resolved, cache });
+      const result = await forceSyncOmniRouteModels({ resolved, cache, logger });
       if (!result.ok) {
-        console.warn(
-          `[omniroute-plugin] auto-sync failed providerId=${resolved.providerId}: ${result.error}`
-        );
+        logger.error(`auto-sync failed providerId=${resolved.providerId}: ${result.error}`);
         return;
       }
       if (lastCount === undefined) {
@@ -960,15 +976,15 @@ export function startOmniRouteAutoSync(args: {
         return;
       }
       if (result.count !== lastCount) {
-        console.warn(
-          `[omniroute-plugin] auto-sync catalog size changed ${lastCount} → ${result.count} ` +
+        logger.info(
+          `auto-sync catalog size changed ${lastCount} → ${result.count} ` +
             `(providerId=${resolved.providerId})`
         );
         lastCount = result.count;
       }
     })()
       .catch((err) => {
-        console.warn("[omniroute-plugin] auto-sync tick error", err);
+        logger.error(`auto-sync tick error: ${err instanceof Error ? err.message : String(err)}`);
       })
       .finally(() => {
         inFlight = null;
@@ -982,9 +998,7 @@ export function startOmniRouteAutoSync(args: {
     timer.unref();
   }
 
-  console.warn(
-    `[omniroute-plugin] auto-sync enabled intervalMs=${intervalMs} providerId=${resolved.providerId}`
-  );
+  logger.info(`auto-sync enabled intervalMs=${intervalMs} providerId=${resolved.providerId}`);
 
   return () => {
     stopped = true;
@@ -994,6 +1008,9 @@ export function startOmniRouteAutoSync(args: {
 
 export const OmniRoutePlugin: Plugin = async (_input, options) => {
   const resolved = resolveOmniRoutePluginOptions(coercePluginOptions(options));
+  const logger = createLogger(
+    resolved.features?.startupDebug ? "debug" : (resolved.features?.logLevel ?? "warn")
+  );
   // T-07: a single per-plugin-instance cache shared between the provider
   // hook (T-03/T-05) and the config-shim hook (T-07). On OC ≥1.14.49 both
   // hooks fire within the same Plugin invocation, so a shared cache keeps
@@ -1010,7 +1027,7 @@ export const OmniRoutePlugin: Plugin = async (_input, options) => {
   const _hash: string =
     ((globalThis as Record<string, unknown>).__PLUGIN_GIT_HASH__ as string) ?? "unknown";
   const _prefixes = resolved.features?.apiFormat?.anthropicPrefixes ?? DEFAULT_ANTHROPIC_PREFIXES;
-  _logger.always(
+  logger.info(
     `v${_ver} (${_hash}) initialized` +
       ` providerId=${resolved.providerId}` +
       ` baseURL=${resolved.baseURL ?? "(from auth.json)"}` +
@@ -1020,14 +1037,11 @@ export const OmniRoutePlugin: Plugin = async (_input, options) => {
       ` logLevel=${resolved.features?.startupDebug ? "debug" : (resolved.features?.logLevel ?? "warn")}`
   );
 
-  // Wire log level: startupDebug:true → "debug", explicit logLevel wins.
-  setLogLevel(resolved.features?.startupDebug ? "debug" : (resolved.features?.logLevel ?? "warn"));
-
   // Background auto-discovery while the harness is running (Pi parity).
   // Interval 0 disables. TTL on-demand discovery still works via modelCacheTtl.
-  startOmniRouteAutoSync({ resolved, cache: sharedCache });
+  startOmniRouteAutoSync({ resolved, cache: sharedCache, logger });
 
-  const syncTool = createOmniRouteSyncModelsTool({ resolved, cache: sharedCache });
+  const syncTool = createOmniRouteSyncModelsTool({ resolved, cache: sharedCache, logger });
   const bareProviderId = resolved.omnirouteProviderId;
 
   // Config hook: keep existing catalog shim, and register slash command
@@ -1035,6 +1049,7 @@ export const OmniRoutePlugin: Plugin = async (_input, options) => {
   // Pi-style registerCommand API; tools + command templates are the native path).
   const baseConfigHook = createOmniRouteConfigHook(resolved, {
     cache: sharedCache,
+    logger,
     diskSnapshotReader: defaultDiskSnapshotReader,
     diskSnapshotWriter: defaultDiskSnapshotWriter,
   });
@@ -5143,13 +5158,13 @@ export const defaultReadAuthJson: OmniRouteReadAuthJson = async () => {
  *           `auth.json[providerId].baseURL`),
  *       (e) `input.provider[providerId]` is ALREADY set (operator override
  *           wins — we never clobber manually-curated catalogs).
- *     Each no-op path emits ONE debug-level breadcrumb to `console.warn`
+ *     Each no-op path emits ONE debug-level breadcrumb through the leveled logger
  *     so the operator can diagnose without log spam. Malformed `auth.json`
  *     warns once and continues as if the file were missing.
  *   - Fail-open on fetcher errors: a `/v1/models` failure → still publish
  *     a stub `{models: {}}` provider block (so OC has a complete-shape
  *     entry to render). A `/api/combos` failure → publish models-only.
- *     Both paths emit ONE `console.warn`.
+ *     Both paths emit ONE error-level logger message.
  *   - When the provider hook (T-03/T-05) has ALREADY populated the shared
  *     cache for this (baseURL, apiKey) tuple, we reuse the raw payloads
  *     directly — no second fetch. (And vice-versa: the config hook fires
@@ -5172,8 +5187,8 @@ export const defaultReadAuthJson: OmniRouteReadAuthJson = async () => {
  *   - `cache`            — shared fetch-result cache (see
  *                          `OmniRouteFetchCache`). Pass the same Map the
  *                          provider hook owns to dedupe round-trips.
- *   - `logger`           — `{warn}` sink for breadcrumb capture in tests.
- *                          Defaults to `console`.
+ *   - `logger`           — injected sink for breadcrumb capture in tests.
+ *                          Defaults to the plugin's leveled logger.
  */
 export function createOmniRouteConfigHook(
   opts?: OmniRoutePluginOptions,
@@ -5189,7 +5204,11 @@ export function createOmniRouteConfigHook(
     diskSnapshotWriter?: OmniRouteDiskSnapshotWriter;
     now?: () => number;
     cache?: OmniRouteFetchCache;
-    logger?: { warn: (...args: unknown[]) => void };
+    logger?: {
+      error?: (message: string, ...args: unknown[]) => void;
+      warn: (message: string, ...args: unknown[]) => void;
+      debug?: (message: string, ...args: unknown[]) => void;
+    };
   } = {}
 ): (input: Config) => Promise<void> {
   const resolved = resolveOmniRoutePluginOptions(opts);
@@ -5205,7 +5224,11 @@ export function createOmniRouteConfigHook(
   const diskSnapshotWriter = deps.diskSnapshotWriter ?? noopDiskSnapshotWriter;
   const now = deps.now ?? Date.now;
   const cache: OmniRouteFetchCache = deps.cache ?? new Map();
-  const logger = deps.logger ?? console;
+  const logger = deps.logger ?? _logger;
+  const logAt = (level: "error" | "warn" | "debug", message: string): void => {
+    const sink = logger[level] ?? logger.warn;
+    sink.call(logger, message);
+  };
   const features = resolved.features ?? {};
   const wantAutoCombos = features.autoCombos !== false;
   const wantEnrichment = features.enrichment !== false;
@@ -5220,9 +5243,7 @@ export function createOmniRouteConfigHook(
     // generated block. Detect-and-respect before any I/O.
     const existingProviders = (input as { provider?: Record<string, unknown> }).provider;
     if (existingProviders && existingProviders[resolved.providerId] !== undefined) {
-      logger.warn(
-        `[omniroute-plugin] config shim skipped: provider.${resolved.providerId} already set by user`
-      );
+      logAt("debug", `config shim skipped: provider.${resolved.providerId} already set by user`);
       return;
     }
 
@@ -5237,7 +5258,7 @@ export function createOmniRouteConfigHook(
     }
 
     if (authJson === null) {
-      logger.warn("[omniroute-plugin] config shim: auth.json failed to parse; treating as missing");
+      logAt("warn", "config shim: auth.json failed to parse; treating as missing");
       authJson = undefined;
     }
 
@@ -5264,9 +5285,7 @@ export function createOmniRouteConfigHook(
       // (c) no apiKey — silent no-op (with debug breadcrumb). The operator
       // hasn't run `/connect <providerId>` yet, OR the stored credential
       // isn't api-flavored. OC will handle the `/connect` flow at runtime.
-      logger.warn(
-        `[omniroute-plugin] config shim skipped: no apiKey for providerId=${resolved.providerId}`
-      );
+      logAt("debug", `config shim skipped: no apiKey for providerId=${resolved.providerId}`);
       return;
     }
     // Management-plane catalog reads may use a narrower read-only token.
@@ -5279,9 +5298,7 @@ export function createOmniRouteConfigHook(
     const storedBaseURL = entry && typeof entry.baseURL === "string" ? entry.baseURL : undefined;
     const baseURL = resolved.baseURL ?? storedBaseURL ?? "";
     if (!baseURL) {
-      logger.warn(
-        `[omniroute-plugin] config shim skipped: no baseURL for providerId=${resolved.providerId}`
-      );
+      logAt("debug", `config shim skipped: no baseURL for providerId=${resolved.providerId}`);
       return;
     }
 
@@ -5326,8 +5343,9 @@ export function createOmniRouteConfigHook(
           // Log snapshot age (accept any age — instant beats empty).
           const age = (snapshotResult as { writtenAt?: number }).writtenAt;
           const ageLabel = typeof age === "number" ? `${Math.round((Date.now() - age) / 3_600_000)}h` : "unknown";
-          logger.warn(
-            `[omniroute-plugin] config shim: warm startup from disk snapshot (${snapshotResult.rawModels.length} models, age ${ageLabel})`
+          logAt(
+            "warn",
+            `config shim: warm startup from disk snapshot (${snapshotResult.rawModels.length} models, age ${ageLabel})`
           );
         }
       }
@@ -5353,9 +5371,9 @@ export function createOmniRouteConfigHook(
           try {
             localRawModels = await fetcher(baseURL, apiKey, 10_000);
           } catch (err) {
-            logger.warn(
-              "[omniroute-plugin] config shim: /v1/models fetch failed; publishing stub provider entry",
-              err
+            logAt(
+              "error",
+              `config shim: /v1/models fetch failed; publishing stub provider entry: ${err instanceof Error ? err.message : String(err)}`
             );
             localRawModels = [];
             modelsFetchThrew = true;
@@ -5366,9 +5384,9 @@ export function createOmniRouteConfigHook(
           try {
             localRawCombos = await combosFetcher(baseURL, managementReadToken, 10_000);
           } catch (err) {
-            logger.warn(
-              "[omniroute-plugin] config shim: /api/combos fetch failed; publishing models-only static catalog",
-              err
+            logAt(
+              "error",
+              `config shim: /api/combos fetch failed; publishing models-only static catalog: ${err instanceof Error ? err.message : String(err)}`
             );
           }
         };
@@ -5387,9 +5405,9 @@ export function createOmniRouteConfigHook(
           try {
             localRawEnrichment = await enrichmentFetcher(baseURL, managementReadToken, 10_000);
           } catch (err) {
-            logger.warn(
-              "[omniroute-plugin] config shim: /api/pricing/models fetch failed; publishing raw-id static catalog",
-              err
+            logAt(
+              "error",
+              `config shim: /api/pricing/models fetch failed; publishing raw-id static catalog: ${err instanceof Error ? err.message : String(err)}`
             );
           }
         };
@@ -5399,9 +5417,9 @@ export function createOmniRouteConfigHook(
           try {
             localRawCompressionCombos = await compressionMetaFetcher(baseURL, managementReadToken, 10_000);
           } catch (err) {
-            logger.warn(
-              "[omniroute-plugin] config shim: /api/context/combos fetch failed; publishing combos without compression suffix",
-              err
+            logAt(
+              "error",
+              `config shim: /api/context/combos fetch failed; publishing combos without compression suffix: ${err instanceof Error ? err.message : String(err)}`
             );
           }
         };
@@ -5411,9 +5429,9 @@ export function createOmniRouteConfigHook(
           try {
             localRawConnections = await providersFetcher(baseURL, managementReadToken, 10_000);
           } catch (err) {
-            logger.warn(
-              "[omniroute-plugin] config shim: /api/providers fetch failed; usableOnly filter disabled for this refresh",
-              err
+            logAt(
+              "error",
+              `config shim: /api/providers fetch failed; usableOnly filter disabled for this refresh: ${err instanceof Error ? err.message : String(err)}`
             );
           }
         };
@@ -5436,8 +5454,9 @@ export function createOmniRouteConfigHook(
         if (modelsFetchThrew && wantDiskCache && !warmSnapshot) {
           const snapshot = await diskSnapshotReader(resolved.providerId, snapshotFingerprint);
           if (snapshot && snapshot.rawModels.length > 0) {
-            logger.warn(
-              `[omniroute-plugin] config shim: /v1/models unreachable; using stale disk cache (${snapshot.rawModels.length} models)`
+            logAt(
+              "warn",
+              `config shim: /v1/models unreachable; using stale disk cache (${snapshot.rawModels.length} models)`
             );
             localRawModels = snapshot.rawModels;
             localRawCombos = snapshot.rawCombos;
@@ -5459,6 +5478,7 @@ export function createOmniRouteConfigHook(
           rawConnections: localRawConnections,
           expiresAt: now() + resolved.modelCacheTtl,
         });
+        });
 
         // Startup diagnostics (file-based) — fires at startup via config hook
         if (resolved.features?.startupDebug === true) {
@@ -5537,7 +5557,10 @@ export function createOmniRouteConfigHook(
         } else {
           const refreshP = doRefresh()
             .catch((err: unknown) => {
-              logger.warn("[omniroute-plugin] config shim: background refresh failed", err);
+              logAt(
+                "error",
+                `config shim: background refresh failed: ${err instanceof Error ? err.message : String(err)}`
+              );
             })
             .finally(() => {
               _inflightRefresh.delete(cacheKey);
@@ -5563,7 +5586,10 @@ export function createOmniRouteConfigHook(
         } else {
           const refreshP = doRefresh()
             .catch((err: unknown) => {
-              logger.warn("[omniroute-plugin] config shim: refresh failed", err);
+              logAt(
+                "error",
+                `config shim: refresh failed: ${err instanceof Error ? err.message : String(err)}`
+              );
             })
             .finally(() => {
               _inflightRefresh.delete(cacheKey);
@@ -5618,8 +5644,9 @@ export function createOmniRouteConfigHook(
     if (features.mcpAutoEmit === true) {
       const mcpKey = features.mcpToken ?? apiKey;
       if (!mcpKey) {
-        logger.warn(
-          `[omniroute-plugin] mcp auto-emit skipped: no Bearer token for providerId=${resolved.providerId}`
+        logAt(
+          "debug",
+          `mcp auto-emit skipped: no Bearer token for providerId=${resolved.providerId}`
         );
       } else {
         const inputWithMcp = input as { mcp?: Record<string, unknown> };
@@ -5627,9 +5654,7 @@ export function createOmniRouteConfigHook(
           inputWithMcp.mcp = {};
         }
         if (inputWithMcp.mcp[resolved.providerId] !== undefined) {
-          logger.warn(
-            `[omniroute-plugin] mcp auto-emit skipped: mcp.${resolved.providerId} already set by user`
-          );
+          logAt("debug", `mcp auto-emit skipped: mcp.${resolved.providerId} already set by user`);
         } else {
           // Strip a trailing `/v1` from baseURL when present so we land on
           // the MCP transport at /api/mcp/stream, not /v1/api/mcp/stream.
diff --git a/@omniroute/opencode-plugin/src/logger.ts b/@omniroute/opencode-plugin/src/logger.ts
index de283c113c..cdf5a7855e 100644
--- a/@omniroute/opencode-plugin/src/logger.ts
+++ b/@omniroute/opencode-plugin/src/logger.ts
@@ -36,39 +36,47 @@ function fmt(level: LogLevel, msg: string, tag?: string): string {
   return `${prefix} [${level.toUpperCase()}] ${msg}`;
 }
 
-export const logger = {
-  error(msg: string, ...args: unknown[]): void {
-    if (shouldLog(_level, "error")) console.error(fmt("error", msg), ...args);
-  },
-  warn(msg: string, ...args: unknown[]): void {
-    if (shouldLog(_level, "warn")) console.warn(fmt("warn", msg), ...args);
-  },
-  info(msg: string, ...args: unknown[]): void {
-    if (shouldLog(_level, "info")) console.warn(fmt("info", msg), ...args);
-  },
-  debug(msg: string, ...args: unknown[]): void {
-    if (shouldLog(_level, "debug")) console.warn(fmt("debug", msg), ...args);
-  },
-  /** Always emit regardless of level (for critical init breadcrumbs). */
-  always(msg: string, ...args: unknown[]): void {
-    console.warn(TAG, msg, ...args);
-  },
+function buildLogger(getLevel: () => LogLevel) {
+  return {
+    error(msg: string, ...args: unknown[]): void {
+      if (shouldLog(getLevel(), "error")) console.error(fmt("error", msg), ...args);
+    },
+    warn(msg: string, ...args: unknown[]): void {
+      if (shouldLog(getLevel(), "warn")) console.warn(fmt("warn", msg), ...args);
+    },
+    info(msg: string, ...args: unknown[]): void {
+      if (shouldLog(getLevel(), "info")) console.warn(fmt("info", msg), ...args);
+    },
+    debug(msg: string, ...args: unknown[]): void {
+      if (shouldLog(getLevel(), "debug")) console.warn(fmt("debug", msg), ...args);
+    },
+    /** Always emit regardless of level (for critical init breadcrumbs). */
+    always(msg: string, ...args: unknown[]): void {
+      console.warn(TAG, msg, ...args);
+    },
 
-  // ── Tagged child loggers ──────────────────────────────────────────────
-  child(tag: string) {
-    return {
-      error: (msg: string, ...args: unknown[]) =>
-        shouldLog(_level, "error") &&
-        console.error(fmt("error", msg, tag), ...args),
-      warn: (msg: string, ...args: unknown[]) =>
-        shouldLog(_level, "warn") &&
-        console.warn(fmt("warn", msg, tag), ...args),
-      info: (msg: string, ...args: unknown[]) =>
-        shouldLog(_level, "info") &&
-        console.warn(fmt("info", msg, tag), ...args),
-      debug: (msg: string, ...args: unknown[]) =>
-        shouldLog(_level, "debug") &&
-        console.warn(fmt("debug", msg, tag), ...args),
-    };
-  },
-};
+    // ── Tagged child loggers ────────────────────────────────────────────
+    child(tag: string) {
+      return {
+        error: (msg: string, ...args: unknown[]) =>
+          shouldLog(getLevel(), "error") && console.error(fmt("error", msg, tag), ...args),
+        warn: (msg: string, ...args: unknown[]) =>
+          shouldLog(getLevel(), "warn") && console.warn(fmt("warn", msg, tag), ...args),
+        info: (msg: string, ...args: unknown[]) =>
+          shouldLog(getLevel(), "info") && console.warn(fmt("info", msg, tag), ...args),
+        debug: (msg: string, ...args: unknown[]) =>
+          shouldLog(getLevel(), "debug") && console.warn(fmt("debug", msg, tag), ...args),
+      };
+    },
+  };
+}
+
+export type Logger = ReturnType<typeof buildLogger>;
+
+/** Create an instance-scoped logger whose level cannot be changed by other plugin instances. */
+export function createLogger(level: LogLevel): Logger {
+  return buildLogger(() => level);
+}
+
+/** Backward-compatible module-global logger controlled by setLogLevel(). */
+export const logger: Logger = buildLogger(() => _level);
diff --git a/@omniroute/opencode-plugin/tests/auto-sync.test.ts b/@omniroute/opencode-plugin/tests/auto-sync.test.ts
index 95d52f1902..709fbdf317 100644
--- a/@omniroute/opencode-plugin/tests/auto-sync.test.ts
+++ b/@omniroute/opencode-plugin/tests/auto-sync.test.ts
@@ -13,6 +13,22 @@ import {
   forceSyncOmniRouteModels,
   type OmniRouteFetchCache,
 } from "../src/index.js";
+import { getLogLevel, setLogLevel } from "../src/logger.js";
+
+async function captureConsole(run: () => Promise<void>): Promise<string[]> {
+  const lines: string[] = [];
+  const originalError = console.error;
+  const originalWarn = console.warn;
+  console.error = (...args: unknown[]) => lines.push(args.map(String).join(" "));
+  console.warn = (...args: unknown[]) => lines.push(args.map(String).join(" "));
+  try {
+    await run();
+  } finally {
+    console.error = originalError;
+    console.warn = originalWarn;
+  }
+  return lines;
+}
 
 test("sanitizeAutoSyncIntervalMs: unset → default 300000", () => {
   assert.equal(sanitizeAutoSyncIntervalMs(undefined), DEFAULT_AUTO_SYNC_INTERVAL_MS);
@@ -35,7 +51,10 @@ test("sanitizeAutoSyncIntervalMs: keeps valid values", () => {
 
 test("parseOmniRoutePluginOptions accepts autoSyncIntervalMs including 0", () => {
   assert.equal(parseOmniRoutePluginOptions({ autoSyncIntervalMs: 0 }).autoSyncIntervalMs, 0);
-  assert.equal(parseOmniRoutePluginOptions({ autoSyncIntervalMs: 120_000 }).autoSyncIntervalMs, 120_000);
+  assert.equal(
+    parseOmniRoutePluginOptions({ autoSyncIntervalMs: 120_000 }).autoSyncIntervalMs,
+    120_000
+  );
 });
 
 test("resolveOmniRoutePluginOptions defaults autoSyncIntervalMs to 300000", () => {
@@ -112,6 +131,76 @@ test("forceSyncOmniRouteModels: fetches, populates cache, returns count", async
   assert.equal(entry.expiresAt, 1_000_000 + resolved.modelCacheTtl);
 });
 
+test("forceSyncOmniRouteModels suppresses successful lifecycle output at error level", async () => {
+  const previousLevel = getLogLevel();
+  const cache: OmniRouteFetchCache = new Map();
+  const resolved = resolveOmniRoutePluginOptions({
+    providerId: "omniroute",
+    baseURL: "https://omniroute.example/v1",
+    features: {
+      autoCombos: false,
+      combos: false,
+      compressionMetadata: false,
+      diskCache: false,
+      enrichment: false,
+      logLevel: "error",
+      usableOnly: false,
+    },
+  });
+
+  try {
+    setLogLevel("error");
+    const lines = await captureConsole(async () => {
+      const result = await forceSyncOmniRouteModels({
+        resolved,
+        cache,
+        readAuthJson: async () => ({ omniroute: { type: "api", key: "test-key" } }),
+        fetcher: async () => [{ id: "model-a", object: "model" }],
+      });
+      assert.equal(result.ok, true);
+    });
+
+    assert.deepEqual(lines, []);
+  } finally {
+    setLogLevel(previousLevel);
+  }
+});
+
+test("forceSyncOmniRouteModels preserves successful lifecycle output at info level", async () => {
+  const previousLevel = getLogLevel();
+  const cache: OmniRouteFetchCache = new Map();
+  const resolved = resolveOmniRoutePluginOptions({
+    providerId: "omniroute",
+    baseURL: "https://omniroute.example/v1",
+    features: {
+      autoCombos: false,
+      combos: false,
+      compressionMetadata: false,
+      diskCache: false,
+      enrichment: false,
+      logLevel: "info",
+      usableOnly: false,
+    },
+  });
+
+  try {
+    setLogLevel("info");
+    const lines = await captureConsole(async () => {
+      const result = await forceSyncOmniRouteModels({
+        resolved,
+        cache,
+        readAuthJson: async () => ({ omniroute: { type: "api", key: "test-key" } }),
+        fetcher: async () => [{ id: "model-a", object: "model" }],
+      });
+      assert.equal(result.ok, true);
+    });
+
+    assert.equal(lines.filter((line) => line.includes("force sync ok")).length, 1);
+  } finally {
+    setLogLevel(previousLevel);
+  }
+});
+
 test("forceSyncOmniRouteModels: missing auth returns error", async () => {
   const cache: OmniRouteFetchCache = new Map();
   const resolved = resolveOmniRoutePluginOptions({
diff --git a/@omniroute/opencode-plugin/tests/log-level.test.ts b/@omniroute/opencode-plugin/tests/log-level.test.ts
new file mode 100644
index 0000000000..7e73cb4eb8
--- /dev/null
+++ b/@omniroute/opencode-plugin/tests/log-level.test.ts
@@ -0,0 +1,218 @@
+import assert from "node:assert/strict";
+import { mkdtemp, rm } from "node:fs/promises";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+import test from "node:test";
+import type { Config } from "@opencode-ai/plugin";
+
+import { createOmniRouteConfigHook, OmniRoutePlugin } from "../src/index.js";
+import { getLogLevel, logger, setLogLevel, type LogLevel } from "../src/logger.js";
+
+type ConsoleMethod = "error" | "info" | "log" | "warn";
+type ConsoleEntries = Record<ConsoleMethod, unknown[][]>;
+
+const fakeInput = {} as Parameters<typeof OmniRoutePlugin>[0];
+const consoleMethods: ConsoleMethod[] = ["error", "info", "log", "warn"];
+
+async function captureConsole(run: () => Promise<void>): Promise<ConsoleEntries> {
+  const entries: ConsoleEntries = { error: [], info: [], log: [], warn: [] };
+  const originals = Object.fromEntries(
+    consoleMethods.map((method) => [method, console[method]])
+  ) as Record<ConsoleMethod, typeof console.warn>;
+
+  for (const method of consoleMethods) {
+    console[method] = (...args: unknown[]) => {
+      entries[method].push(args);
+    };
+  }
+
+  try {
+    await run();
+  } finally {
+    for (const method of consoleMethods) console[method] = originals[method];
+  }
+
+  return entries;
+}
+
+function rendered(entries: ConsoleEntries): string[] {
+  return consoleMethods.flatMap((method) =>
+    entries[method].map((args) => args.map((arg) => String(arg)).join(" "))
+  );
+}
+
+async function capturePluginLifecycle(args: {
+  level: LogLevel;
+  autoSyncIntervalMs: number;
+  invokeConfig?: boolean;
+}): Promise<string[]> {
+  const previousDataDir = process.env.OPENCODE_DATA_DIR;
+  const previousLevel = getLogLevel();
+  const dataDir = await mkdtemp(join(tmpdir(), "omniroute-log-level-"));
+  process.env.OPENCODE_DATA_DIR = dataDir;
+
+  try {
+    const entries = await captureConsole(async () => {
+      const hooks = await OmniRoutePlugin(fakeInput, {
+        autoSyncIntervalMs: args.autoSyncIntervalMs,
+        features: { logLevel: args.level },
+      });
+      if (args.invokeConfig) {
+        assert.equal(typeof hooks.config, "function");
+        await hooks.config!({} as Config);
+      }
+    });
+    return rendered(entries);
+  } finally {
+    setLogLevel(previousLevel);
+    if (previousDataDir === undefined) delete process.env.OPENCODE_DATA_DIR;
+    else process.env.OPENCODE_DATA_DIR = previousDataDir;
+    await rm(dataDir, { recursive: true, force: true });
+  }
+}
+
+test("logLevel error suppresses the initialization banner", async () => {
+  const lines = await capturePluginLifecycle({ level: "error", autoSyncIntervalMs: 0 });
+
+  assert.equal(lines.filter((line) => line.includes("initialized")).length, 0);
+});
+
+test("logLevel error suppresses the auto-sync enabled lifecycle message", async () => {
+  const lines = await capturePluginLifecycle({ level: "error", autoSyncIntervalMs: 60_000 });
+
+  assert.equal(lines.filter((line) => line.includes("auto-sync enabled")).length, 0);
+});
+
+test("logLevel error suppresses factory config-shim diagnostics", async () => {
+  const lines = await capturePluginLifecycle({
+    level: "error",
+    autoSyncIntervalMs: 0,
+    invokeConfig: true,
+  });
+
+  assert.equal(lines.filter((line) => line.includes("config shim skipped")).length, 0);
+});
+
+test("logLevel debug preserves startup and config-shim diagnostics", async () => {
+  const lines = await capturePluginLifecycle({
+    level: "debug",
+    autoSyncIntervalMs: 60_000,
+    invokeConfig: true,
+  });
+
+  assert.ok(
+    lines.some((line) => line.includes("initialized")),
+    "initialization banner emitted"
+  );
+  assert.ok(
+    lines.some((line) => line.includes("auto-sync enabled")),
+    "auto-sync message emitted"
+  );
+  assert.ok(
+    lines.some((line) => line.includes("config shim skipped")),
+    "config breadcrumb emitted"
+  );
+});
+
+test("debug instance retains config diagnostics after an error instance is created", async () => {
+  const lines = rendered(
+    await captureConsole(async () => {
+      const debugHooks = await OmniRoutePlugin(fakeInput, {
+        autoSyncIntervalMs: 0,
+        features: { logLevel: "debug" },
+      });
+      await OmniRoutePlugin(fakeInput, {
+        autoSyncIntervalMs: 0,
+        features: { logLevel: "error" },
+      });
+      await debugHooks.config!({} as Config);
+    })
+  );
+
+  assert.equal(lines.filter((line) => line.includes("config shim skipped")).length, 1);
+});
+
+test("error instance keeps config diagnostics suppressed after a debug instance is created", async () => {
+  const lines = rendered(
+    await captureConsole(async () => {
+      const errorHooks = await OmniRoutePlugin(fakeInput, {
+        autoSyncIntervalMs: 0,
+        features: { logLevel: "error" },
+      });
+      await OmniRoutePlugin(fakeInput, {
+        autoSyncIntervalMs: 0,
+        features: { logLevel: "debug" },
+      });
+      await errorHooks.config!({} as Config);
+    })
+  );
+
+  assert.equal(lines.filter((line) => line.includes("config shim skipped")).length, 0);
+});
+
+test("error-level config fetch failures remain visible as concise injected-logger messages", async () => {
+  const entries: unknown[][] = [];
+  const hook = createOmniRouteConfigHook(
+    {
+      baseURL: "https://omniroute.example/v1",
+      features: {
+        autoCombos: false,
+        diskCache: false,
+        enrichment: false,
+        logLevel: "error",
+      },
+    },
+    {
+      readAuthJson: async () => ({
+        "opencode-omniroute": { type: "api", key: "test-key" },
+      }),
+      fetcher: async () => {
+        throw new Error("models unavailable");
+      },
+      combosFetcher: async () => {
+        throw new Error("combos unavailable");
+      },
+      logger: {
+        warn: (...args: unknown[]) => {
+          entries.push(args);
+        },
+      },
+    }
+  );
+
+  await hook({} as Config);
+
+  assert.equal(entries.length, 2, "both genuine fetch failures remain visible");
+  assert.deepEqual(
+    entries.map((args) => args.length),
+    [1, 1],
+    "each failure is emitted as one concise argument"
+  );
+  const lines = entries.map(([message]) => String(message));
+  assert.ok(
+    lines.some((line) => line.includes("/v1/models") && line.includes("models unavailable"))
+  );
+  assert.ok(
+    lines.some((line) => line.includes("/api/combos") && line.includes("combos unavailable"))
+  );
+  assert.equal(
+    entries.flat().some((arg) => arg instanceof Error),
+    false,
+    "no raw Error object emitted"
+  );
+});
+
+test("logger error output remains visible at error level", async () => {
+  const previousLevel = getLogLevel();
+  try {
+    setLogLevel("error");
+    const lines = rendered(
+      await captureConsole(async () => {
+        logger.error("genuine startup failure");
+      })
+    );
+    assert.ok(lines.some((line) => line.includes("genuine startup failure")));
+  } finally {
+    setLogLevel(previousLevel);
+  }
+});