fix(mcp) : allow unauthenticated GET on /_mcp for SSE streaming

Claude Code MCP HTTP client sends GET SSE requests without the
Authorization header, breaking the streamable HTTP transport.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

composer.json

@@ -26,6 +26,7 @@
         "symfony/http-client": "8.0.*",
         "symfony/mcp-bundle": "^0.6.0",
         "symfony/mime": "8.0.*",
+        "symfony/monolog-bundle": "^4.0",
         "symfony/property-access": "8.0.*",
         "symfony/property-info": "8.0.*",
         "symfony/runtime": "8.0.*",

composer.lock

@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "3e2146f74bbda750c75ab52eb437d2d4",
+    "content-hash": "6fd67ba307d74fa0bcb9e6b9bf72f8bc",
     "packages": [
         {
             "name": "api-platform/doctrine-common",
@@ -2625,6 +2625,109 @@
             },
             "time": "2026-02-23T21:42:54+00:00"
         },
+        {
+            "name": "monolog/monolog",
+            "version": "3.10.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/Seldaek/monolog.git",
+                "reference": "b321dd6749f0bf7189444158a3ce785cc16d69b0"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/Seldaek/monolog/zipball/b321dd6749f0bf7189444158a3ce785cc16d69b0",
+                "reference": "b321dd6749f0bf7189444158a3ce785cc16d69b0",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=8.1",
+                "psr/log": "^2.0 || ^3.0"
+            },
+            "provide": {
+                "psr/log-implementation": "3.0.0"
+            },
+            "require-dev": {
+                "aws/aws-sdk-php": "^3.0",
+                "doctrine/couchdb": "~1.0@dev",
+                "elasticsearch/elasticsearch": "^7 || ^8",
+                "ext-json": "*",
+                "graylog2/gelf-php": "^1.4.2 || ^2.0",
+                "guzzlehttp/guzzle": "^7.4.5",
+                "guzzlehttp/psr7": "^2.2",
+                "mongodb/mongodb": "^1.8 || ^2.0",
+                "php-amqplib/php-amqplib": "~2.4 || ^3",
+                "php-console/php-console": "^3.1.8",
+                "phpstan/phpstan": "^2",
+                "phpstan/phpstan-deprecation-rules": "^2",
+                "phpstan/phpstan-strict-rules": "^2",
+                "phpunit/phpunit": "^10.5.17 || ^11.0.7",
+                "predis/predis": "^1.1 || ^2",
+                "rollbar/rollbar": "^4.0",
+                "ruflin/elastica": "^7 || ^8",
+                "symfony/mailer": "^5.4 || ^6",
+                "symfony/mime": "^5.4 || ^6"
+            },
+            "suggest": {
+                "aws/aws-sdk-php": "Allow sending log messages to AWS services like DynamoDB",
+                "doctrine/couchdb": "Allow sending log messages to a CouchDB server",
+                "elasticsearch/elasticsearch": "Allow sending log messages to an Elasticsearch server via official client",
+                "ext-amqp": "Allow sending log messages to an AMQP server (1.0+ required)",
+                "ext-curl": "Required to send log messages using the IFTTTHandler, the LogglyHandler, the SendGridHandler, the SlackWebhookHandler or the TelegramBotHandler",
+                "ext-mbstring": "Allow to work properly with unicode symbols",
+                "ext-mongodb": "Allow sending log messages to a MongoDB server (via driver)",
+                "ext-openssl": "Required to send log messages using SSL",
+                "ext-sockets": "Allow sending log messages to a Syslog server (via UDP driver)",
+                "graylog2/gelf-php": "Allow sending log messages to a GrayLog2 server",
+                "mongodb/mongodb": "Allow sending log messages to a MongoDB server (via library)",
+                "php-amqplib/php-amqplib": "Allow sending log messages to an AMQP server using php-amqplib",
+                "rollbar/rollbar": "Allow sending log messages to Rollbar",
+                "ruflin/elastica": "Allow sending log messages to an Elastic Search server"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-main": "3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Monolog\\": "src/Monolog"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Jordi Boggiano",
+                    "email": "j.boggiano@seld.be",
+                    "homepage": "https://seld.be"
+                }
+            ],
+            "description": "Sends your logs to files, sockets, inboxes, databases and various web services",
+            "homepage": "https://github.com/Seldaek/monolog",
+            "keywords": [
+                "log",
+                "logging",
+                "psr-3"
+            ],
+            "support": {
+                "issues": "https://github.com/Seldaek/monolog/issues",
+                "source": "https://github.com/Seldaek/monolog/tree/3.10.0"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/Seldaek",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/monolog/monolog",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-01-02T08:56:05+00:00"
+        },
         {
             "name": "nelmio/cors-bundle",
             "version": "2.6.1",
@@ -5789,6 +5892,162 @@
             ],
             "time": "2026-03-06T13:17:40+00:00"
         },
+        {
+            "name": "symfony/monolog-bridge",
+            "version": "v8.0.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/monolog-bridge.git",
+                "reference": "4dae5fe7f503c0e5ed304db684c3f0d95017e429"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/monolog-bridge/zipball/4dae5fe7f503c0e5ed304db684c3f0d95017e429",
+                "reference": "4dae5fe7f503c0e5ed304db684c3f0d95017e429",
+                "shasum": ""
+            },
+            "require": {
+                "monolog/monolog": "^3",
+                "php": ">=8.4",
+                "symfony/http-kernel": "^7.4|^8.0",
+                "symfony/service-contracts": "^2.5|^3"
+            },
+            "require-dev": {
+                "symfony/console": "^7.4|^8.0",
+                "symfony/http-client": "^7.4|^8.0",
+                "symfony/mailer": "^7.4|^8.0",
+                "symfony/messenger": "^7.4|^8.0",
+                "symfony/mime": "^7.4|^8.0",
+                "symfony/security-core": "^7.4|^8.0",
+                "symfony/var-dumper": "^7.4|^8.0"
+            },
+            "type": "symfony-bridge",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Bridge\\Monolog\\": ""
+                },
+                "exclude-from-classmap": [
+                    "/Tests/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Provides integration for Monolog with various Symfony components",
+            "homepage": "https://symfony.com",
+            "support": {
+                "source": "https://github.com/symfony/monolog-bridge/tree/v8.0.6"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2026-02-17T13:07:04+00:00"
+        },
+        {
+            "name": "symfony/monolog-bundle",
+            "version": "v4.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/monolog-bundle.git",
+                "reference": "3b4ee2717ee56c5e1edb516140a175eb2a72bc66"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/monolog-bundle/zipball/3b4ee2717ee56c5e1edb516140a175eb2a72bc66",
+                "reference": "3b4ee2717ee56c5e1edb516140a175eb2a72bc66",
+                "shasum": ""
+            },
+            "require": {
+                "composer-runtime-api": "^2.0",
+                "monolog/monolog": "^3.5",
+                "php": ">=8.2",
+                "symfony/config": "^7.3 || ^8.0",
+                "symfony/dependency-injection": "^7.3 || ^8.0",
+                "symfony/http-kernel": "^7.3 || ^8.0",
+                "symfony/monolog-bridge": "^7.3 || ^8.0",
+                "symfony/polyfill-php84": "^1.30"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^11.5.41 || ^12.3",
+                "symfony/console": "^7.3 || ^8.0",
+                "symfony/yaml": "^7.3 || ^8.0"
+            },
+            "type": "symfony-bundle",
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Bundle\\MonologBundle\\": "src"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony MonologBundle",
+            "homepage": "https://symfony.com",
+            "keywords": [
+                "log",
+                "logging"
+            ],
+            "support": {
+                "issues": "https://github.com/symfony/monolog-bundle/issues",
+                "source": "https://github.com/symfony/monolog-bundle/tree/v4.0.1"
+            },
+            "funding": [
+                {
+                    "url": "https://symfony.com/sponsor",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/fabpot",
+                    "type": "github"
+                },
+                {
+                    "url": "https://github.com/nicolas-grekas",
+                    "type": "github"
+                },
+                {
+                    "url": "https://tidelift.com/funding/github/packagist/symfony/symfony",
+                    "type": "tidelift"
+                }
+            ],
+            "time": "2025-12-08T08:00:13+00:00"
+        },
         {
             "name": "symfony/password-hasher",
             "version": "v8.0.6",

config/bundles.php

@@ -10,6 +10,7 @@ use Lexik\Bundle\JWTAuthenticationBundle\LexikJWTAuthenticationBundle;
 use Nelmio\CorsBundle\NelmioCorsBundle;
 use Symfony\AI\McpBundle\McpBundle;
 use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+use Symfony\Bundle\MonologBundle\MonologBundle;
 use Symfony\Bundle\SecurityBundle\SecurityBundle;
 use Symfony\Bundle\TwigBundle\TwigBundle;
 
@@ -24,4 +25,5 @@ return [
     DoctrineFixturesBundle::class       => ['dev' => true, 'test' => true],
     LexikJWTAuthenticationBundle::class => ['all' => true],
     McpBundle::class                    => ['all' => true],
+    MonologBundle::class                => ['all' => true],
 ];

config/packages/monolog.yaml

@@ -0,0 +1,56 @@
+monolog:
+    channels:
+        - deprecation
+
+when@dev:
+    monolog:
+        handlers:
+            main:
+                type: rotating_file
+                path: "%kernel.logs_dir%/%kernel.environment%.log"
+                level: debug
+                max_files: 7
+                channels: ["!event"]
+            console:
+                type: console
+                process_psr_3_messages: false
+                channels: ["!event", "!doctrine", "!console"]
+
+when@test:
+    monolog:
+        handlers:
+            main:
+                type: fingers_crossed
+                action_level: error
+                handler: nested
+                excluded_http_codes: [404, 405]
+                channels: ["!event"]
+            nested:
+                type: stream
+                path: "%kernel.logs_dir%/%kernel.environment%.log"
+                level: debug
+
+when@prod:
+    monolog:
+        handlers:
+            main:
+                type: fingers_crossed
+                action_level: error
+                handler: nested
+                excluded_http_codes: [404, 405]
+                channels: ["!deprecation"]
+                buffer_size: 50
+            nested:
+                type: rotating_file
+                path: "%kernel.logs_dir%/%kernel.environment%.log"
+                level: debug
+                max_files: 30
+            console:
+                type: console
+                process_psr_3_messages: false
+                channels: ["!event", "!doctrine"]
+            deprecation:
+                type: rotating_file
+                channels: [deprecation]
+                path: "%kernel.logs_dir%/deprecations.log"
+                max_files: 7

config/packages/security.yaml

@@ -59,6 +59,7 @@ security:
         - { path: ^/api/docs, roles: PUBLIC_ACCESS }
         # Version de l'application en public
         - { path: ^/api/version, roles: PUBLIC_ACCESS, methods: [ GET ] }
+        - { path: ^/_mcp, roles: PUBLIC_ACCESS, methods: [ GET ] }
         - { path: ^/_mcp, roles: IS_AUTHENTICATED_FULLY }
         - { path: ^/api, roles: IS_AUTHENTICATED_FULLY }
 

config/version.yaml

@@ -1,2 +1,2 @@
 parameters:
-    app.version: '0.2.2'
+    app.version: '0.2.3'

script/deploy-release.sh

@@ -80,6 +80,11 @@ fi
 
 echo "Release ${TAG} deployed to ${DEPLOY_DIR}"
 
+# Ensure var/log exists and is writable by PHP (www-data)
+mkdir -p "${DEPLOY_DIR}/var/log"
+chown www-data:www-data "${DEPLOY_DIR}/var/log"
+chmod 775 "${DEPLOY_DIR}/var/log"
+
 if [ -f "${DEPLOY_DIR}/.env.local" ]; then
   echo "Clearing cache..."
   php "${DEPLOY_DIR}/bin/console" cache:clear --env=prod --no-debug

symfony.lock

@@ -172,6 +172,18 @@
     "symfony/mcp-bundle": {
         "version": "v0.6.0"
     },
+    "symfony/monolog-bundle": {
+        "version": "4.0",
+        "recipe": {
+            "repo": "github.com/symfony/recipes",
+            "branch": "main",
+            "version": "3.7",
+            "ref": "1b9efb10c54cb51c713a9391c9300ff8bceda459"
+        },
+        "files": [
+            "config/packages/monolog.yaml"
+        ]
+    },
     "symfony/property-info": {
         "version": "8.0",
         "recipe": {