feat(logging): add structured server diagnostics

.env.example

@@ -24,3 +24,6 @@ IP_INTELLIGENCE_PROVIDER=proxycheck
 PROXYCHECK_API_KEY=
 IP_INTELLIGENCE_CACHE_HOURS=48
 BLOCK_HOSTING_IPS=false
+
+# Structured Pino logging
+LOG_LEVEL=info

Dockerfile

@@ -10,6 +10,7 @@ COPY apps/discord-bot/package.json ./apps/discord-bot/package.json
 COPY packages/auth/package.json ./packages/auth/package.json
 COPY packages/contracts/package.json ./packages/contracts/package.json
 COPY packages/database/package.json ./packages/database/package.json
+COPY packages/logging/package.json ./packages/logging/package.json
 COPY packages/minecraft/package.json ./packages/minecraft/package.json
 COPY packages/network/package.json ./packages/network/package.json
 RUN npm ci
@@ -25,6 +26,7 @@ LABEL org.opencontainers.image.title="Minecraft Account Manager" \
       org.opencontainers.image.source="https://git.garvis.dev/dmg/minecraft-account-manager"
 WORKDIR /app
 ENV NODE_ENV=production \
+    APP_VERSION=${VERSION} \
     HOSTNAME=0.0.0.0 \
     PORT=3000
 RUN addgroup --system app && adduser --system --ingroup app app
@@ -40,7 +42,8 @@ LABEL org.opencontainers.image.title="Minecraft Account Manager Discord Bot" \
       org.opencontainers.image.version="${VERSION}" \
       org.opencontainers.image.source="https://git.garvis.dev/dmg/minecraft-account-manager"
 WORKDIR /app
-ENV NODE_ENV=production
+ENV NODE_ENV=production \
+    APP_VERSION=${VERSION}
 RUN addgroup --system app && adduser --system --ingroup app app
 COPY --chown=app:app package.json package-lock.json tsconfig.base.json ./
 COPY --chown=app:app apps/discord-bot ./apps/discord-bot

apps/discord-bot/.env.example

@@ -3,3 +3,4 @@ APP_URL=http://localhost:3000
 DISCORD_BOT_TOKEN=
 DISCORD_APPLICATION_ID=
 DISCORD_GUILD_ID=
+LOG_LEVEL=info

apps/discord-bot/package.json

@@ -13,6 +13,7 @@
     "@minecraft-account-manager/auth": "*",
     "@minecraft-account-manager/contracts": "*",
     "@minecraft-account-manager/database": "*",
+    "@minecraft-account-manager/logging": "*",
     "discord.js": "^14.25.1",
     "dotenv": "^17.2.3",
     "drizzle-orm": "^0.45.1"

apps/discord-bot/src/deploy-commands.ts

@@ -2,10 +2,22 @@ import "dotenv/config";
 import { REST, Routes } from "discord.js";
 import { commands } from "./commands";
 import { requiredEnvironment } from "./config";
+import { logger } from "./logger";
 
 const token = requiredEnvironment("DISCORD_BOT_TOKEN");
 const applicationId = requiredEnvironment("DISCORD_APPLICATION_ID");
 const rest = new REST({ version: "10" }).setToken(token);
 
+try {
   await rest.put(Routes.applicationCommands(applicationId), { body: commands });
-console.log(`Deployed ${commands.length} global Discord commands.`);
+  logger.info(
+    { event: "discord.commands_deployed", commandCount: commands.length },
+    "Deployed global Discord commands",
+  );
+} catch (error) {
+  logger.fatal(
+    { err: error, event: "discord.commands_deploy_failed" },
+    "Failed to deploy global Discord commands",
+  );
+  process.exitCode = 1;
+}

apps/discord-bot/src/index.ts

@@ -14,6 +14,7 @@ import {
   GatewayIntentBits,
 } from "discord.js";
 import { commandNames, requiredEnvironment } from "./config";
+import { logger } from "./logger";
 
 const token = requiredEnvironment("DISCORD_BOT_TOKEN");
 const appUrl = requiredEnvironment("APP_URL");
@@ -24,7 +25,10 @@ const authRepository = createAuthRepository(db);
 const client = new Client({ intents: [GatewayIntentBits.Guilds] });
 
 client.once(Events.ClientReady, (readyClient) => {
-  console.log(`Discord bot ready as ${readyClient.user.tag}`);
+  logger.info(
+    { event: "discord.ready", botUserId: readyClient.user.id, botUsername: readyClient.user.username },
+    "Discord bot is ready",
+  );
 });
 
 client.on(Events.InteractionCreate, async (interaction) => {
@@ -71,9 +75,17 @@ client.on(Events.InteractionCreate, async (interaction) => {
       await interaction.editReply("Please wait 30 seconds before requesting another private account link.");
       return;
     }
-    console.error("Failed to create Discord account link", error);
+    logger.error(
+      { err: error, event: "discord.magic_link_failed", command: interaction.commandName },
+      "Failed to create Discord account link",
+    );
     await interaction.editReply("I could not create an account link. Please try again shortly.");
   }
 });
 
+try {
   await client.login(token);
+} catch (error) {
+  logger.fatal({ err: error, event: "discord.login_failed" }, "Discord bot login failed");
+  process.exitCode = 1;
+}

apps/discord-bot/src/logger.ts

@@ -0,0 +1,3 @@
+import { createLogger } from "@minecraft-account-manager/logging";
+
+export const logger = createLogger("minecraft-account-manager-discord-bot");

apps/web/next.config.ts

@@ -34,6 +34,7 @@ const nextConfig: NextConfig = {
   transpilePackages: [
     "@minecraft-account-manager/contracts",
     "@minecraft-account-manager/database",
+    "@minecraft-account-manager/logging",
   ],
 };
 

apps/web/package.json

@@ -14,6 +14,7 @@
     "@minecraft-account-manager/auth": "*",
     "@minecraft-account-manager/contracts": "*",
     "@minecraft-account-manager/database": "*",
+    "@minecraft-account-manager/logging": "*",
     "@minecraft-account-manager/minecraft": "*",
     "@minecraft-account-manager/network": "*",
     "drizzle-orm": "^0.45.1",

apps/web/src/app/api/velocity/access/route.ts

@@ -14,6 +14,7 @@ import { NextResponse } from "next/server";
 import { db } from "@/lib/database";
 import { isUniqueConstraintViolation } from "@/lib/database-errors";
 import { getIpIntelligence, toAuditIpData } from "@/lib/ip-intelligence";
+import { logger } from "@/lib/logger";
 import { problemInstance, problemResponse } from "@/lib/problem-response";
 
 const MAX_CLOCK_SKEW_MS = 45_000;
@@ -284,7 +285,10 @@ export async function POST(request: Request) {
       ));
     }
 
-    console.error("Velocity access request failed");
+    logger.error(
+      { err: error, event: "velocity.access_failed", instance },
+      "Velocity access request failed",
+    );
     return problemResponse(problemDetails(
       "urn:error:service-unavailable",
       "Service unavailable",

apps/web/src/lib/ip-intelligence.ts

@@ -12,6 +12,7 @@ import { ipIntelligence } from "@minecraft-account-manager/database";
 import { and, eq, gt } from "drizzle-orm";
 import { headers } from "next/headers";
 import { db } from "@/lib/database";
+import { logger } from "@/lib/logger";
 
 const classifications = new Set<IpClassification>([
   "unknown",
@@ -77,6 +78,13 @@ export async function getIpIntelligence(
   options: { now?: Date; forceRefresh?: boolean } = {},
 ): Promise<IpIntelligenceResult> {
   if (!isPublicIp(ipAddress)) {
+    logger.warn(
+      {
+        event: "ip_intelligence.skipped",
+        reason: "non_public_address",
+      },
+      "IP intelligence lookup skipped for a non-public client address",
+    );
     return { classification: "unknown", provider: null };
   }
 
@@ -96,14 +104,23 @@ export async function getIpIntelligence(
     const result = await provider.classify(ipAddress);
     await cacheResult(ipAddress, result, now, cacheHours() * 60 * 60_000);
     return result;
-  } catch {
+  } catch (error) {
+    const providerName = process.env.IP_INTELLIGENCE_PROVIDER?.trim().toLowerCase() || null;
     const result: IpIntelligenceResult = {
       classification: "unknown",
-      provider: process.env.IP_INTELLIGENCE_PROVIDER?.trim().toLowerCase() || null,
+      provider: providerName,
       lookupError: true,
     };
-    await cacheResult(ipAddress, result, now, 5 * 60_000).catch(() => undefined);
+    await cacheResult(ipAddress, result, now, 5 * 60_000).catch((cacheError) => {
-    console.error("IP intelligence lookup failed");
+      logger.error(
+        { err: cacheError, event: "ip_intelligence.cache_failed", provider: providerName },
+        "Failed to cache an IP intelligence lookup error",
+      );
+    });
+    logger.error(
+      { err: error, event: "ip_intelligence.lookup_failed", provider: providerName },
+      "IP intelligence lookup failed",
+    );
     return result;
   }
 }
@@ -134,6 +151,15 @@ export async function checkAccountAdditionNetwork() {
   const requestHeaders = await headers();
   const ipAddress = getClientIp(requestHeaders, process.env.TRUST_PROXY === "true");
   if (!ipAddress) {
+    logger.warn(
+      {
+        event: "client_ip.unavailable",
+        trustProxy: process.env.TRUST_PROXY === "true",
+        forwardedForPresent: requestHeaders.has("x-forwarded-for"),
+        realIpPresent: requestHeaders.has("x-real-ip"),
+      },
+      "Client IP address was unavailable for account addition",
+    );
     return {
       allowed: false as const,
       reason: "unavailable" as const,

apps/web/src/lib/logger.ts

@@ -0,0 +1,3 @@
+import { createLogger } from "@minecraft-account-manager/logging";
+
+export const logger = createLogger("minecraft-account-manager-web");

design/log.md

@@ -2,6 +2,7 @@
 
 ## 2026-08-01
 
+* **Extend**: Add shared Pino logging with credential redaction and actionable web and Discord runtime diagnostics.
 * **Fix**: Build magic-link redirects from the configured public portal URL instead of the reverse proxy's internal request origin.
 * **Verify**: Confirmed `v1.1.1` left all pre-existing `latest` digests unchanged while publishing versioned artifacts.
 * **Refine**: Removed mutable `latest` publication so all deployable artifacts use explicit semantic versions.

design/us-015-platform-operations.md

@@ -3,7 +3,7 @@ type: User Story
 title: Deploy and operate the platform securely
 description: Operators have repeatable builds, migrations, credential provisioning, configuration, and security checks.
 tags: [operations, security, database, deployment]
-timestamp: 2026-08-01T19:46:09Z
+timestamp: 2026-08-01T21:37:26Z
 story_id: US-015
 status: verified
 ---
@@ -22,6 +22,7 @@ As a platform operator, I want reproducible deployment and security controls, so
 - [x] Environment examples document database, Keycloak, Discord, trusted proxy, and ProxyCheck settings without secrets.
 - [x] The web application sets CSP, framing, MIME, referrer, and permissions headers.
 - [x] The web runtime provides a dependency-free health endpoint for orchestration probes.
+- [x] Web and Discord bot runtimes emit structured Pino logs with credential-field redaction and safe operational context.
 - [x] npm dependency audit and Semgrep security review complete without findings at the last verified change.
 - [x] Architecture, Keycloak, API error, security, bot, and Velocity operating documentation is available.
 
@@ -33,10 +34,11 @@ As a platform operator, I want reproducible deployment and security controls, so
 - [`packages/database/scripts/create-plugin-credential.ts`](../packages/database/scripts/create-plugin-credential.ts)
 - [`plugins/velocity/build.gradle.kts`](../plugins/velocity/build.gradle.kts)
 - [`apps/web/next.config.ts`](../apps/web/next.config.ts)
+- [`packages/logging/src/index.ts`](../packages/logging/src/index.ts)
 
 # Validation
 
-Use `npm test`, `npm run typecheck`, `npm run lint`, `npm run build`, `npm run velocity:build`, `npm audit`, and `npm run design:validate`.
+Use `npm test`, `npm run typecheck`, `npm run lint`, `npm run build`, `npm run velocity:build`, `npm audit`, and `npm run design:validate`. Structured logging redaction is covered by [`packages/logging/test/logger.test.ts`](../packages/logging/test/logger.test.ts).
 
 # Related Stories
 

package-lock.json

@@ -22,6 +22,7 @@
         "@minecraft-account-manager/auth": "*",
         "@minecraft-account-manager/contracts": "*",
         "@minecraft-account-manager/database": "*",
+        "@minecraft-account-manager/logging": "*",
         "discord.js": "^14.25.1",
         "dotenv": "^17.2.3",
         "drizzle-orm": "^0.45.1"
@@ -38,6 +39,7 @@
         "@minecraft-account-manager/auth": "*",
         "@minecraft-account-manager/contracts": "*",
         "@minecraft-account-manager/database": "*",
+        "@minecraft-account-manager/logging": "*",
         "@minecraft-account-manager/minecraft": "*",
         "@minecraft-account-manager/network": "*",
         "drizzle-orm": "^0.45.1",
@@ -1781,6 +1783,10 @@
       "resolved": "apps/discord-bot",
       "link": true
     },
+    "node_modules/@minecraft-account-manager/logging": {
+      "resolved": "packages/logging",
+      "link": true
+    },
     "node_modules/@minecraft-account-manager/minecraft": {
       "resolved": "packages/minecraft",
       "link": true
@@ -2038,6 +2044,12 @@
         "url": "https://github.com/sponsors/panva"
       }
     },
+    "node_modules/@pinojs/redact": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/@pinojs/redact/-/redact-0.4.0.tgz",
+      "integrity": "sha512-k2ENnmBugE/rzQfEcdWHcCY+/FM3VLzH9cYEsbdsoqrvzAKRhUZeRNhAZvB8OitQJ1TBed3yqWtdjzS6wJKBwg==",
+      "license": "MIT"
+    },
     "node_modules/@rolldown/binding-android-arm64": {
       "version": "1.2.1",
       "resolved": "https://registry.npmjs.org/@rolldown/binding-android-arm64/-/binding-android-arm64-1.2.1.tgz",
@@ -3810,6 +3822,15 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/atomic-sleep": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/atomic-sleep/-/atomic-sleep-1.0.0.tgz",
+      "integrity": "sha512-kNOjDqAh7px0XWNI+4QbzoiR/nTkHAWNud2uvnJquD1/x5a7EQZMJT0AczqK0Qn67oY/TTQ1LbUKajZpp3I9tQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
     "node_modules/available-typed-arrays": {
       "version": "1.0.7",
       "resolved": "https://registry.npmjs.org/available-typed-arrays/-/available-typed-arrays-1.0.7.tgz",
@@ -7052,6 +7073,15 @@
         "node": "^10.13.0 || >=12.0.0"
       }
     },
+    "node_modules/on-exit-leak-free": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/on-exit-leak-free/-/on-exit-leak-free-2.1.2.tgz",
+      "integrity": "sha512-0eJJY6hXLGf1udHwfNftBqH+g73EU4B504nZeKpz1sYRKafAghwxEJunB2O7rDZkL4PGfsMVnTXZ2EjibbqcsA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/openid-client": {
       "version": "5.7.1",
       "resolved": "https://registry.npmjs.org/openid-client/-/openid-client-5.7.1.tgz",
@@ -7220,6 +7250,43 @@
         "url": "https://github.com/sponsors/jonschlinkert"
       }
     },
+    "node_modules/pino": {
+      "version": "10.3.1",
+      "resolved": "https://registry.npmjs.org/pino/-/pino-10.3.1.tgz",
+      "integrity": "sha512-r34yH/GlQpKZbU1BvFFqOjhISRo1MNx1tWYsYvmj6KIRHSPMT2+yHOEb1SG6NMvRoHRF0a07kCOox/9yakl1vg==",
+      "license": "MIT",
+      "dependencies": {
+        "@pinojs/redact": "^0.4.0",
+        "atomic-sleep": "^1.0.0",
+        "on-exit-leak-free": "^2.1.0",
+        "pino-abstract-transport": "^3.0.0",
+        "pino-std-serializers": "^7.0.0",
+        "process-warning": "^5.0.0",
+        "quick-format-unescaped": "^4.0.3",
+        "real-require": "^0.2.0",
+        "safe-stable-stringify": "^2.3.1",
+        "sonic-boom": "^4.0.1",
+        "thread-stream": "^4.0.0"
+      },
+      "bin": {
+        "pino": "bin.js"
+      }
+    },
+    "node_modules/pino-abstract-transport": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/pino-abstract-transport/-/pino-abstract-transport-3.0.0.tgz",
+      "integrity": "sha512-wlfUczU+n7Hy/Ha5j9a/gZNy7We5+cXp8YL+X+PG8S0KXxw7n/JXA3c46Y0zQznIJ83URJiwy7Lh56WLokNuxg==",
+      "license": "MIT",
+      "dependencies": {
+        "split2": "^4.0.0"
+      }
+    },
+    "node_modules/pino-std-serializers": {
+      "version": "7.1.0",
+      "resolved": "https://registry.npmjs.org/pino-std-serializers/-/pino-std-serializers-7.1.0.tgz",
+      "integrity": "sha512-BndPH67/JxGExRgiX1dX0w1FvZck5Wa4aal9198SrRhZjH3GxKQUKIBnYJTdj2HDN3UQAS06HlfcSbQj2OHmaw==",
+      "license": "MIT"
+    },
     "node_modules/possible-typed-array-names": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/possible-typed-array-names/-/possible-typed-array-names-1.1.0.tgz",
@@ -7317,6 +7384,22 @@
       "integrity": "sha512-WuxUnVtlWL1OfZFQFuqvnvs6MiAGk9UNsBostyBOB0Is9wb5uRESevA6rnl/rkksXaGX3GzZhPup5d6Vp1nFew==",
       "license": "MIT"
     },
+    "node_modules/process-warning": {
+      "version": "5.1.0",
+      "resolved": "https://registry.npmjs.org/process-warning/-/process-warning-5.1.0.tgz",
+      "integrity": "sha512-jQSaVHsPgtyw60e1rQ/A+/ArPEj/S8pS/vFnyGa/gYFXrKk/6RuDkoqVDQ5NI5MmS01698ltlAk0NoDBNLujRw==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/fastify"
+        },
+        {
+          "type": "opencollective",
+          "url": "https://opencollective.com/fastify"
+        }
+      ],
+      "license": "MIT"
+    },
     "node_modules/prop-types": {
       "version": "15.8.1",
       "resolved": "https://registry.npmjs.org/prop-types/-/prop-types-15.8.1.tgz",
@@ -7360,6 +7443,12 @@
       ],
       "license": "MIT"
     },
+    "node_modules/quick-format-unescaped": {
+      "version": "4.0.4",
+      "resolved": "https://registry.npmjs.org/quick-format-unescaped/-/quick-format-unescaped-4.0.4.tgz",
+      "integrity": "sha512-tYC1Q1hgyRuHgloV/YXs2w15unPVh8qfu/qCTfhTYamaw7fyhumKa2yGpdSo87vY32rIclj+4fWYQXUMs9EHvg==",
+      "license": "MIT"
+    },
     "node_modules/react": {
       "version": "19.2.8",
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.8.tgz",
@@ -7388,6 +7477,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/real-require": {
+      "version": "0.2.0",
+      "resolved": "https://registry.npmjs.org/real-require/-/real-require-0.2.0.tgz",
+      "integrity": "sha512-57frrGM/OCTLqLOAh0mhVA9VBMHd+9U7Zb2THMGdBUoZVOtGbJzjxsYGDJ3A9AYYCP4hn6y1TVbaOfzWtm5GFg==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 12.13.0"
+      }
+    },
     "node_modules/reflect.getprototypeof": {
       "version": "1.0.10",
       "resolved": "https://registry.npmjs.org/reflect.getprototypeof/-/reflect.getprototypeof-1.0.10.tgz",
@@ -7600,6 +7698,15 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/safe-stable-stringify": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/safe-stable-stringify/-/safe-stable-stringify-2.5.0.tgz",
+      "integrity": "sha512-b3rppTKm9T+PsVCBEOUR46GWI7fdOs00VKZ1+9c1EWDaDMvjQc6tUwuFyIprgGgTcWoVHSKrU8H31ZHA2e0RHA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=10"
+      }
+    },
     "node_modules/scheduler": {
       "version": "0.27.0",
       "resolved": "https://registry.npmjs.org/scheduler/-/scheduler-0.27.0.tgz",
@@ -7834,6 +7941,15 @@
       "dev": true,
       "license": "ISC"
     },
+    "node_modules/sonic-boom": {
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/sonic-boom/-/sonic-boom-4.2.1.tgz",
+      "integrity": "sha512-w6AxtubXa2wTXAUsZMMWERrsIRAdrK0Sc+FUytWvYAhBJLyuI4llrMIC1DtlNSdI99EI86KZum2MMq3EAZlF9Q==",
+      "license": "MIT",
+      "dependencies": {
+        "atomic-sleep": "^1.0.0"
+      }
+    },
     "node_modules/source-map": {
       "version": "0.6.1",
       "resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
@@ -7864,6 +7980,15 @@
         "source-map": "^0.6.0"
       }
     },
+    "node_modules/split2": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/split2/-/split2-4.2.0.tgz",
+      "integrity": "sha512-UcjcJOWknrNkF6PLX83qcHM6KHgVKNkV62Y8a5uYDVv9ydGQVwAHMKqHdJje1VTWpljG0WYpCDhrCdAOYH4TWg==",
+      "license": "ISC",
+      "engines": {
+        "node": ">= 10.x"
+      }
+    },
     "node_modules/stable-hash": {
       "version": "0.0.5",
       "resolved": "https://registry.npmjs.org/stable-hash/-/stable-hash-0.0.5.tgz",
@@ -8106,6 +8231,24 @@
         "url": "https://opencollective.com/webpack"
       }
     },
+    "node_modules/thread-stream": {
+      "version": "4.2.0",
+      "resolved": "https://registry.npmjs.org/thread-stream/-/thread-stream-4.2.0.tgz",
+      "integrity": "sha512-e2zZ96wSChazBsbENf/Pcm/4swHt2cEKQ92rhUjkL9GCKiTDJIaTBenjE/m9DXi0QBmTMDkFDdOomUy20A1tDQ==",
+      "license": "MIT",
+      "dependencies": {
+        "real-require": "^1.0.0"
+      },
+      "engines": {
+        "node": ">=20"
+      }
+    },
+    "node_modules/thread-stream/node_modules/real-require": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/real-require/-/real-require-1.0.0.tgz",
+      "integrity": "sha512-P4nbQYQfePJxRSmY+v/KINxVucm4NF3p3s7pJveMTtom52FR4YGltUQLB8idDXwDDWW+eYrWDFbuzUnjoWHF7g==",
+      "license": "MIT"
+    },
     "node_modules/tinybench": {
       "version": "2.9.0",
       "resolved": "https://registry.npmjs.org/tinybench/-/tinybench-2.9.0.tgz",
@@ -9215,6 +9358,18 @@
         "typescript": "^5.9.3"
       }
     },
+    "packages/logging": {
+      "name": "@minecraft-account-manager/logging",
+      "version": "0.1.0",
+      "dependencies": {
+        "pino": "^10.3.1"
+      },
+      "devDependencies": {
+        "@types/node": "^25.0.3",
+        "typescript": "^5.9.3",
+        "vitest": "^4.1.0"
+      }
+    },
     "packages/minecraft": {
       "name": "@minecraft-account-manager/minecraft",
       "version": "0.1.0",

packages/logging/package.json

@@ -0,0 +1,19 @@
+{
+  "name": "@minecraft-account-manager/logging",
+  "version": "0.1.0",
+  "private": true,
+  "type": "module",
+  "exports": { ".": "./src/index.ts" },
+  "scripts": {
+    "test": "vitest run",
+    "typecheck": "tsc --noEmit"
+  },
+  "dependencies": {
+    "pino": "^10.3.1"
+  },
+  "devDependencies": {
+    "@types/node": "^25.0.3",
+    "typescript": "^5.9.3",
+    "vitest": "^4.1.0"
+  }
+}

packages/logging/src/index.ts

@@ -0,0 +1,35 @@
+import pino, { type DestinationStream, type Logger } from "pino";
+
+const redactedPaths = [
+  "apiKey",
+  "authorization",
+  "password",
+  "token",
+  "*.apiKey",
+  "*.authorization",
+  "*.password",
+  "*.token",
+  "headers.authorization",
+  "req.headers.authorization",
+];
+
+export function createLogger(
+  service: string,
+  options: { destination?: DestinationStream } = {},
+): Logger {
+  return pino(
+    {
+      level: process.env.LOG_LEVEL?.trim() || "info",
+      base: {
+        service,
+        environment: process.env.NODE_ENV ?? "development",
+        version: process.env.APP_VERSION ?? "development",
+      },
+      redact: {
+        paths: redactedPaths,
+        censor: "[Redacted]",
+      },
+    },
+    options.destination,
+  );
+}

packages/logging/test/logger.test.ts

@@ -0,0 +1,31 @@
+import { Writable } from "node:stream";
+import { describe, expect, it } from "vitest";
+import { createLogger } from "../src/index";
+
+function captureLog() {
+  let output = "";
+  const destination = new Writable({
+    write(chunk, _encoding, callback) {
+      output += chunk.toString();
+      callback();
+    },
+  });
+  return { destination, read: () => JSON.parse(output.trim()) as Record<string, unknown> };
+}
+
+describe("structured application logging", () => {
+  it("emits service metadata and redacts credential fields", () => {
+    const capture = captureLog();
+    const logger = createLogger("account-manager-test", { destination: capture.destination });
+
+    logger.info({ token: "secret-token", apiKey: "secret-key", operation: "test" }, "Test event");
+
+    expect(capture.read()).toMatchObject({
+      service: "account-manager-test",
+      token: "[Redacted]",
+      apiKey: "[Redacted]",
+      operation: "test",
+      msg: "Test event",
+    });
+  });
+});

packages/logging/tsconfig.json

@@ -0,0 +1,5 @@
+{
+  "extends": "../../tsconfig.base.json",
+  "compilerOptions": { "types": ["node", "vitest/globals"] },
+  "include": ["src/**/*.ts", "test/**/*.ts"]
+}