From 00b0555c976ec0f4df9f260679de3bb509c5030b Mon Sep 17 00:00:00 2001
From: saravanakumardb1 <saravanakumardb1@users.noreply.github.com>
Date: Thu, 5 Mar 2026 12:38:09 -0800
Subject: [PATCH] fix(fastify-core,mcp-server): add logLevel to
 ServiceAppOptions and wire config.LOG_LEVEL so log verbosity is actually
 honoured at runtime

---
 packages/fastify-core/src/create-app.ts | 15 +++++++++++++--
 packages/fastify-core/src/types.ts      |  1 +
 services/mcp-server/src/server.ts       |  1 +
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/packages/fastify-core/src/create-app.ts b/packages/fastify-core/src/create-app.ts
index d06c901a..6d85aadd 100644
--- a/packages/fastify-core/src/create-app.ts
+++ b/packages/fastify-core/src/create-app.ts
@@ -26,9 +26,20 @@ import type { ServiceAppOptions, FastifyApp } from './types.js';
  * ```
  */
 export async function createServiceApp(options: ServiceAppOptions): Promise<FastifyApp> {
-  const { name, version, description, corsOrigin, logger = true, swagger, metrics } = options;
+  const {
+    name,
+    version,
+    description,
+    corsOrigin,
+    logger = true,
+    logLevel,
+    swagger,
+    metrics,
+  } = options;
 
-  const app = Fastify({ logger });
+  const app = Fastify({
+    logger: logger ? (logLevel ? { level: logLevel } : true) : false,
+  });
 
   // CORS — deny all origins when CORS_ORIGIN is not explicitly set
   const origin = corsOrigin ? corsOrigin.split(',').map(o => o.trim()) : false;
diff --git a/packages/fastify-core/src/types.ts b/packages/fastify-core/src/types.ts
index bcef1b9a..f0b3d42e 100644
--- a/packages/fastify-core/src/types.ts
+++ b/packages/fastify-core/src/types.ts
@@ -12,6 +12,7 @@ export interface ServiceAppOptions {
   description?: string;
   corsOrigin?: string;
   logger?: boolean;
+  logLevel?: 'trace' | 'debug' | 'info' | 'warn' | 'error' | 'fatal';
   swagger?: SwaggerOptions;
   metrics?: boolean;
 }
diff --git a/services/mcp-server/src/server.ts b/services/mcp-server/src/server.ts
index ac8477c8..8a86d0b8 100644
--- a/services/mcp-server/src/server.ts
+++ b/services/mcp-server/src/server.ts
@@ -30,6 +30,7 @@ const app = await createServiceApp({
   description:
     'ByteLyst MCP Server — platform.telemetry.*, platform.diagnostics.*, extraction.*, support.*',
   corsOrigin: config.CORS_ORIGIN,
+  logLevel: config.LOG_LEVEL,
 });
 
 // Parse JWT on every request (best-effort)