feat(providers): add Lidarr integration

.env.example

@@ -74,6 +74,10 @@ PROWLARR_API_KEY=
 WHISPARR_URL=
 WHISPARR_API_KEY=
 
+# Lidarr
+LIDARR_URL=
+LIDARR_API_KEY=
+
 # =============================================================================
 # SECURITY & AUTHENTICATION
 # =============================================================================
@@ -147,6 +151,12 @@ PROWLARR_LOGS_PATH=
 #   Docker:  /path/to/whisparr/config/logs
 WHISPARR_LOGS_PATH=
 
+# Lidarr examples (container path: /lidarr-logs):
+#   Windows: C:/ProgramData/Lidarr/logs
+#   Linux:   ~/.config/Lidarr/logs
+#   Docker:  /path/to/lidarr/config/logs
+LIDARR_LOGS_PATH=
+
 # =============================================================================
 # MULTIPLE INSTANCES (optional - for multiple servers of the same type)
 # =============================================================================
@@ -191,3 +201,7 @@ PROWLARR_LOGS_PATH_3=
 WHISPARR_LOGS_PATH_1=
 WHISPARR_LOGS_PATH_2=
 WHISPARR_LOGS_PATH_3=
+
+LIDARR_LOGS_PATH_1=
+LIDARR_LOGS_PATH_2=
+LIDARR_LOGS_PATH_3=

.env.tpl

@@ -84,6 +84,10 @@ PROWLARR_API_KEY={{ op://Development/Logarr-Dev/PROWLARR_API_KEY }}
 WHISPARR_URL={{ op://Development/Logarr-Dev/WHISPARR_URL }}
 WHISPARR_API_KEY={{ op://Development/Logarr-Dev/WHISPARR_API_KEY }}
 
+# Lidarr
+LIDARR_URL={{ op://Development/Logarr-Dev/LIDARR_URL }}
+LIDARR_API_KEY={{ op://Development/Logarr-Dev/LIDARR_API_KEY }}
+
 # =============================================================================
 # SECURITY & AUTHENTICATION
 # =============================================================================
@@ -106,3 +110,4 @@ SONARR_LOGS_PATH={{ op://Development/Logarr-Dev/SONARR_LOGS_PATH }}
 RADARR_LOGS_PATH={{ op://Development/Logarr-Dev/RADARR_LOGS_PATH }}
 PROWLARR_LOGS_PATH={{ op://Development/Logarr-Dev/PROWLARR_LOGS_PATH }}
 WHISPARR_LOGS_PATH={{ op://Development/Logarr-Dev/WHISPARR_LOGS_PATH }}
+LIDARR_LOGS_PATH={{ op://Development/Logarr-Dev/LIDARR_LOGS_PATH }}

.github/agents/my-agent.agent.md

@@ -36,7 +36,7 @@ This is a pnpm + Turborepo TypeScript monorepo.
 - `apps/backend`: NestJS 11 API with Drizzle/Postgres, Redis, Socket.IO, Swagger, auth/RBAC, audit logging, retention, ingestion, settings, and proxying.
 - `apps/frontend`: Next.js 16 App Router UI with React 19, Tailwind 4, Radix UI, React Query, and realtime socket hooks.
 - `packages/core`: shared provider interfaces and normalized cross-service types.
-- `packages/provider-*`: provider adapters for Plex, Jellyfin, Emby, Sonarr, Radarr, Prowlarr, Whisparr, plus shared `provider-arr` base logic.
+- `packages/provider-*`: provider adapters for Plex, Jellyfin, Emby, Sonarr, Radarr, Prowlarr, Whisparr, Lidarr, plus shared `provider-arr` base logic.
 - `e2e`: Playwright coverage for key UI flows.
 - `.github/workflows/docker-publish.yml`: CI gates and container publishing.
 

README.md

@@ -11,7 +11,7 @@
 [![Docker](https://img.shields.io/badge/Docker-Ready-2496ED?logo=docker&logoColor=white)](https://www.docker.com/)
 [![License](https://img.shields.io/badge/License-MIT-green.svg)](LICENSE)
 
-Unified logging, intelligent issue detection, and AI-powered analysis for Plex, Jellyfin, Emby, Sonarr, Radarr, Prowlarr, Whisparr, and more.
+Unified logging, intelligent issue detection, and AI-powered analysis for Plex, Jellyfin, Emby, Sonarr, Radarr, Prowlarr, Whisparr, Lidarr, and more.
 
 [Quick Start](#quick-start) · [Features](#features) · [Screenshots](#screenshots) · [Documentation](#documentation)
 
@@ -100,7 +100,8 @@ _Configure multiple AI providers for issue analysis (Anthropic, OpenAI, Google,
 | **Jellyfin** | ✅ Supported | **Plex**     | ✅ Supported |
 | **Sonarr**   | ✅ Supported | **Emby**     | ✅ Supported |
 | **Radarr**   | ✅ Supported | **Whisparr** | ✅ Supported |
-| **Prowlarr** | ✅ Supported | **Kodi**     | 🚧 Planned   |
+| **Prowlarr** | ✅ Supported | **Lidarr**   | ✅ Supported |
+| **Kodi**     | 🚧 Planned   |              |              |
 
 > Logarr uses a provider architecture—adding support for new servers is straightforward. [Contributions welcome!](#contributing)
 
@@ -177,13 +178,14 @@ flowchart TB
         RA[Radarr]
         PR[Prowlarr]
         WH[Whisparr]
+        LI[Lidarr]
     end
 
     FE <--> API
     FE <--> WS
     API <--> PG
     API <--> RD
-    API <--> PX & JF & EM & SO & RA & PR & WH
+    API <--> PX & JF & EM & SO & RA & PR & WH & LI
 ```
 
 ### How It Works
@@ -271,6 +273,7 @@ SONARR_LOGS_PATH=/path/to/sonarr/config/logs
 RADARR_LOGS_PATH=/path/to/radarr/config/logs
 PROWLARR_LOGS_PATH=/path/to/prowlarr/config/logs
 WHISPARR_LOGS_PATH=/path/to/whisparr/config/logs
+LIDARR_LOGS_PATH=/path/to/lidarr/config/logs
 ```
 
 2. **Restart Logarr** — The docker-compose mounts these paths automatically.
@@ -286,6 +289,7 @@ WHISPARR_LOGS_PATH=/path/to/whisparr/config/logs
 | Radarr   | `/radarr-logs`   |
 | Prowlarr | `/prowlarr-logs` |
 | Whisparr | `/whisp-logs`    |
+| Lidarr   | `/lidarr-logs`   |
 
 #### Multiple Instances (e.g., Movies vs Shorts, 1080p vs 4K)
 
@@ -330,6 +334,7 @@ Simply add multiple servers in the UI using the same server type but different U
 | Radarr   | `/config/logs`             | `~/.config/Radarr/logs`             | `C:\ProgramData\Radarr\logs`            |
 | Prowlarr | `/config/logs`             | `~/.config/Prowlarr/logs`           | `C:\ProgramData\Prowlarr\logs`          |
 | Whisparr | `/config/logs`             | `~/.config/Whisparr/logs`           | `C:\ProgramData\Whisparr\logs`          |
+| Lidarr   | `/config/logs`             | `~/.config/Lidarr/logs`             | `C:\ProgramData\Lidarr\logs`            |
 
 ---
 
@@ -371,6 +376,7 @@ logarr/
 │   ├── provider-radarr/    # Radarr integration
 │   ├── provider-prowlarr/  # Prowlarr integration
 │   ├── provider-whisparr/  # Whisparr integration
+│   ├── provider-lidarr/    # Lidarr integration
 │   └── provider-arr/       # Base *arr provider
 └── docker-compose.yml
 ```
@@ -483,6 +489,7 @@ pnpm test:e2e          # Run Playwright E2E tests
 | `@logarr/provider-arr`      | \*arr application log parser           |
 | `@logarr/provider-emby`     | Emby log parser                        |
 | `@logarr/provider-whisparr` | Whisparr provider                      |
+| `@logarr/provider-lidarr`   | Lidarr provider                        |
 
 > Coverage thresholds are enforced at 80% for statements, branches, functions, and lines.
 

apps/backend/Dockerfile

@@ -58,6 +58,8 @@ COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-emby/package.js
 COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-emby/dist ./packages/provider-emby/dist
 COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-whisparr/package.json ./packages/provider-whisparr/
 COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-whisparr/dist ./packages/provider-whisparr/dist
+COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-lidarr/package.json ./packages/provider-lidarr/
+COPY --from=builder --chown=nestjs:nodejs /app/packages/provider-lidarr/dist ./packages/provider-lidarr/dist
 
 # Copy backend
 COPY --from=builder --chown=nestjs:nodejs /app/apps/backend/package.json ./apps/backend/

apps/backend/Dockerfile.dev

@@ -16,7 +16,7 @@ COPY apps/backend/ ./apps/backend/
 RUN pnpm install
 
 # Build only the packages (not backend itself - that will be done in watch mode)
-RUN pnpm build --filter @logarr/core --filter @logarr/provider-arr --filter @logarr/provider-jellyfin --filter @logarr/provider-sonarr --filter @logarr/provider-radarr --filter @logarr/provider-prowlarr --filter @logarr/provider-plex --filter @logarr/provider-emby --filter @logarr/provider-whisparr
+RUN pnpm build --filter @logarr/core --filter @logarr/provider-arr --filter @logarr/provider-jellyfin --filter @logarr/provider-sonarr --filter @logarr/provider-radarr --filter @logarr/provider-prowlarr --filter @logarr/provider-plex --filter @logarr/provider-emby --filter @logarr/provider-whisparr --filter @logarr/provider-lidarr
 
 EXPOSE 4002
 

apps/backend/package.json

@@ -27,6 +27,7 @@
     "@logarr/provider-arr": "workspace:*",
     "@logarr/provider-emby": "workspace:*",
     "@logarr/provider-jellyfin": "workspace:*",
+    "@logarr/provider-lidarr": "workspace:*",
     "@logarr/provider-plex": "workspace:*",
     "@logarr/provider-prowlarr": "workspace:*",
     "@logarr/provider-radarr": "workspace:*",

apps/backend/src/modules/file-ingestion/log-file-processor.spec.ts

@@ -0,0 +1,114 @@
+import { EmbyProvider } from '@logarr/provider-emby';
+import { SonarrProvider } from '@logarr/provider-sonarr';
+import { describe, expect, it } from 'vitest';
+
+import { LogFileProcessor } from './log-file-processor';
+
+import type { MediaServerProvider, ParsedLogEntry } from '@logarr/core';
+
+function feed(
+  lines: string[],
+  provider: MediaServerProvider = new SonarrProvider()
+): ParsedLogEntry[] {
+  const processor = new LogFileProcessor(provider);
+  const out: ParsedLogEntry[] = [];
+  lines.forEach((line, i) => {
+    const entry = processor.processLine(line, i + 1);
+    if (entry) out.push(entry);
+  });
+  const last = processor.flush();
+  if (last) out.push(last);
+  return out;
+}
+
+describe('LogFileProcessor with *arr multi-line errors', () => {
+  it('assembles two entries and a blank-line separated exception with stack trace', () => {
+    const entries = feed([
+      '2026-10-10 12:00:05.4|Error|DownloadClientProvider|Error connecting to qBittorrent',
+      '',
+      '[v4.0.10.2544] System.Net.Http.HttpRequestException: Connection refused',
+      '   at System.Net.Http.HttpConnectionPool.ConnectToTcpHostAsync()',
+      '',
+      '2026-10-10 12:00:06.1|Info|RssSyncService|RSS Sync Completed',
+    ]);
+
+    expect(entries).toHaveLength(2);
+    const [error, info] = entries;
+    expect(error?.level).toBe('error');
+    expect(error?.source).toBe('DownloadClientProvider');
+    expect(error?.message).toBe('Error connecting to qBittorrent - Connection refused');
+    expect(error?.exception).toBe('System.Net.Http.HttpRequestException');
+    expect(error?.stackTrace).toContain('HttpRequestException: Connection refused');
+    expect(error?.stackTrace).toContain('ConnectToTcpHostAsync');
+    expect(error?.stackTrace).not.toContain('RSS Sync');
+    expect(info?.message).toBe('RSS Sync Completed');
+    expect(info?.stackTrace).toBeUndefined();
+  });
+
+  it('emits plain single-line entries', () => {
+    const entries = feed([
+      '2026-10-10 12:00:05.4|Info|A|one',
+      '',
+      '2026-10-10 12:00:06.1|Info|B|two',
+    ]);
+
+    expect(entries.map((e) => e.message)).toEqual(['one', 'two']);
+  });
+
+  it('flushes a trailing error entry at EOF with its exception', () => {
+    const processor = new LogFileProcessor(new SonarrProvider());
+    const lines = [
+      '2026-10-10 12:00:05.4|Error|Src|Boom',
+      '',
+      '[v4.0.10.2544] System.IO.IOException: disk full',
+      '   at Foo.Bar()',
+      '',
+    ];
+    lines.forEach((l, i) => expect(processor.processLine(l, i + 1)).toBeNull());
+
+    const entry = processor.flush();
+    expect(entry?.message).toBe('Boom - disk full');
+    expect(entry?.exception).toBe('System.IO.IOException');
+    expect(entry?.stackTrace).toContain('at Foo.Bar()');
+    expect(processor.flush()).toBeNull();
+  });
+
+  it('drops a stray continuation line at the start of the file', () => {
+    const entries = feed(['   at Orphan.Frame()', '2026-10-10 12:00:05.4|Info|A|one']);
+
+    expect(entries).toHaveLength(1);
+    expect(entries[0]?.message).toBe('one');
+    expect(entries[0]?.stackTrace).toBeUndefined();
+  });
+
+  it('does not attach or emit an unparseable non-continuation line between entries', () => {
+    // 8-digit fraction does not match the NLog format (known limitation) so it is a continuation
+    // of the pending entry; the surrounding entries must still be emitted intact.
+    const entries = feed([
+      '2026-10-10 12:00:05.4|Info|A|one',
+      '2026-10-10 12:00:05.12345678|Info|B|weird',
+      '2026-10-10 12:00:06.1|Info|C|three',
+    ]);
+
+    expect(entries.map((e) => e.message)).toEqual(['one', 'three']);
+    expect(entries[0]?.stackTrace).toContain('weird');
+  });
+
+  it('still works for a provider without finalizeLogEntry (Emby)', () => {
+    const emby = new EmbyProvider();
+    expect((emby as unknown as { finalizeLogEntry?: unknown }).finalizeLogEntry).toBeUndefined();
+
+    const entries = feed(
+      [
+        '2024-01-15 10:30:45.123 Error App: Something failed',
+        '   at Foo.Bar()',
+        '2024-01-15 10:30:46.123 Info App: Next',
+      ],
+      emby
+    );
+
+    expect(entries).toHaveLength(2);
+    expect(entries[0]?.stackTrace).toContain('at Foo.Bar()');
+    expect(entries[1]?.stackTrace).toBeUndefined();
+  });
+});

apps/backend/src/modules/file-ingestion/log-file-processor.ts

@@ -24,6 +24,13 @@ function hasContextParsing(provider: MediaServerProvider): provider is ContextAw
   return typeof (provider as ContextAwareProvider).parseLogLineWithContext === 'function';
 }
 
+type FinalizingProvider = MediaServerProvider &
+  Required<Pick<MediaServerProvider, 'finalizeLogEntry'>>;
+
+function hasFinalizeLogEntry(provider: MediaServerProvider): provider is FinalizingProvider {
+  return typeof provider.finalizeLogEntry === 'function';
+}
+
 function hasLogContinuation(provider: MediaServerProvider): provider is ContextAwareProvider {
   return typeof (provider as ContextAwareProvider).isLogContinuation === 'function';
 }
@@ -175,7 +182,10 @@ export class LogFileProcessor {
       return null;
     }
 
-    const entry = this.pendingEntry;
+    let entry = this.pendingEntry;
+    if (hasFinalizeLogEntry(this.provider) && this.continuationLines.length > 0) {
+      entry = this.provider.finalizeLogEntry(entry, this.continuationLines);
+    }
     // Clear pending entry after finalizing
     this.pendingEntry = null;
 

apps/backend/src/modules/ingestion/ingestion.service.ts

@@ -2,6 +2,7 @@ import { setImmediate } from 'timers';
 
 import { EmbyProvider, EmbyClient } from '@logarr/provider-emby';
 import { JellyfinProvider, JellyfinClient } from '@logarr/provider-jellyfin';
+import { LidarrProvider } from '@logarr/provider-lidarr';
 import { PlexProvider, PlexClient } from '@logarr/provider-plex';
 import { ProwlarrProvider } from '@logarr/provider-prowlarr';
 import { RadarrProvider } from '@logarr/provider-radarr';
@@ -81,6 +82,9 @@ export class IngestionService implements OnModuleInit, OnModuleDestroy {
 
     const whisparrProvider = new WhisparrProvider();
     this.providers.set(whisparrProvider.id, whisparrProvider);
+
+    const lidarrProvider = new LidarrProvider();
+    this.providers.set(lidarrProvider.id, lidarrProvider);
   }
 
   async onModuleInit() {

apps/backend/src/modules/servers/server-seed.service.ts

@@ -70,6 +70,13 @@ const ENV_SERVER_CONFIGS: EnvServerConfig[] = [
     name: 'Whisparr',
     containerLogPath: '/whisparr-logs',
   },
+  {
+    urlEnvKey: 'LIDARR_URL',
+    apiKeyEnvKey: 'LIDARR_API_KEY',
+    providerId: 'lidarr',
+    name: 'Lidarr',
+    containerLogPath: '/lidarr-logs',
+  },
 ];
 
 @Injectable()

apps/backend/src/modules/servers/servers.service.spec.ts

@@ -122,6 +122,26 @@ describe('ServersService', () => {
       await expect(service.create(dto)).rejects.toThrow('Unknown provider');
     });
 
+    it('should accept lidarr as a registered provider', async () => {
+      const lidarrServer = {
+        ...mockServer,
+        id: 'lidarr-1',
+        name: 'Lidarr',
+        providerId: 'lidarr',
+        url: 'http://lidarr:8686',
+      };
+      configureMockDb(mockDb, { insert: [lidarrServer] });
+
+      const result = await service.create({
+        name: 'Lidarr',
+        providerId: 'lidarr',
+        url: 'http://lidarr:8686',
+        apiKey: 'test-key',
+      });
+
+      expect(result).toEqual(lidarrServer);
+    });
+
     it('should start file ingestion if enabled', async () => {
       const serverWithIngestion = {
         ...mockServer,

apps/backend/src/modules/servers/servers.service.ts

@@ -1,5 +1,6 @@
 import { EmbyProvider } from '@logarr/provider-emby';
 import { JellyfinProvider } from '@logarr/provider-jellyfin';
+import { LidarrProvider } from '@logarr/provider-lidarr';
 import { PlexProvider } from '@logarr/provider-plex';
 import { ProwlarrProvider } from '@logarr/provider-prowlarr';
 import { RadarrProvider } from '@logarr/provider-radarr';
@@ -51,6 +52,9 @@ export class ServersService {
 
     const whisparrProvider = new WhisparrProvider();
     this.providers.set(whisparrProvider.id, whisparrProvider);
+
+    const lidarrProvider = new LidarrProvider();
+    this.providers.set(lidarrProvider.id, lidarrProvider);
   }
 
   async findAll() {

apps/frontend/src/app/(dashboard)/logs/page.tsx

@@ -157,6 +157,7 @@ function LogDetailModal({
       case 'radarr':
       case 'sonarr':
       case 'prowlarr':
+      case 'lidarr':
         // *arr apps: system/events shows searchable event log
         return `${baseUrl}/system/events`;
       default: