feat: LLM provider configuration, secret store, and setup wizard

Add secure credential storage (GNOME Keyring + file fallback),
LLM provider config in ~/.mcpctl/config.json, interactive setup
wizard (mcpctl config setup), and wire configured provider into
mcplocal for smart pagination summaries.

- Secret store: SecretStore interface, GnomeKeyringStore, FileSecretStore
- Config schema: LlmConfigSchema with provider/model/url/binaryPath
- Setup wizard: arrow-key provider/model selection, dynamic model fetch
- Provider factory: creates ProviderRegistry from config + secrets
- Status: shows LLM line with hint when not configured
- 572 tests passing across all packages

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

src/mcplocal/src/http/config.ts

@@ -37,6 +37,30 @@ function loadUserToken(): string {
   }
 }
 
+export interface LlmFileConfig {
+  provider: string;
+  model?: string;
+  url?: string;
+  binaryPath?: string;
+}
+
+/**
+ * Load LLM configuration from ~/.mcpctl/config.json.
+ * Returns undefined if no LLM section is configured.
+ */
+export function loadLlmConfig(): LlmFileConfig | undefined {
+  try {
+    const configPath = join(homedir(), '.mcpctl', 'config.json');
+    if (!existsSync(configPath)) return undefined;
+    const raw = readFileSync(configPath, 'utf-8');
+    const parsed = JSON.parse(raw) as { llm?: LlmFileConfig };
+    if (!parsed.llm?.provider || parsed.llm.provider === 'none') return undefined;
+    return parsed.llm;
+  } catch {
+    return undefined;
+  }
+}
+
 export function loadHttpConfig(env: Record<string, string | undefined> = process.env): HttpConfig {
   const portStr = env['MCPLOCAL_HTTP_PORT'];
   const port = portStr !== undefined ? parseInt(portStr, 10) : DEFAULT_HTTP_PORT;

src/mcplocal/src/http/project-mcp-endpoint.ts

@@ -15,6 +15,7 @@ import { McpRouter } from '../router.js';
 import { ResponsePaginator } from '../llm/pagination.js';
 import { refreshProjectUpstreams } from '../discovery.js';
 import type { McpdClient } from './mcpd-client.js';
+import type { ProviderRegistry } from '../providers/registry.js';
 import type { JsonRpcRequest } from '../types.js';
 
 interface ProjectCacheEntry {
@@ -29,7 +30,7 @@ interface SessionEntry {
 
 const CACHE_TTL_MS = 60_000; // 60 seconds
 
-export function registerProjectMcpEndpoint(app: FastifyInstance, mcpdClient: McpdClient): void {
+export function registerProjectMcpEndpoint(app: FastifyInstance, mcpdClient: McpdClient, providerRegistry?: ProviderRegistry | null): void {
   const projectCache = new Map<string, ProjectCacheEntry>();
   const sessions = new Map<string, SessionEntry>();
 
@@ -45,8 +46,8 @@ export function registerProjectMcpEndpoint(app: FastifyInstance, mcpdClient: Mcp
     const router = existing?.router ?? new McpRouter();
     await refreshProjectUpstreams(router, mcpdClient, projectName, authToken);
 
-    // Wire pagination support (no LLM provider for now — simple index fallback)
-    router.setPaginator(new ResponsePaginator(null));
+    // Wire pagination support with LLM provider if configured
+    router.setPaginator(new ResponsePaginator(providerRegistry?.getActive() ?? null));
 
     // Configure prompt resources with SA-scoped client for RBAC
     const saClient = mcpdClient.withHeaders({ 'X-Service-Account': `project:${projectName}` });

src/mcplocal/src/http/server.ts

@@ -10,11 +10,13 @@ import { registerProjectMcpEndpoint } from './project-mcp-endpoint.js';
 import type { McpRouter } from '../router.js';
 import type { HealthMonitor } from '../health.js';
 import type { TieredHealthMonitor } from '../health/tiered.js';
+import type { ProviderRegistry } from '../providers/registry.js';
 
 export interface HttpServerDeps {
   router: McpRouter;
   healthMonitor?: HealthMonitor | undefined;
   tieredHealthMonitor?: TieredHealthMonitor | undefined;
+  providerRegistry?: ProviderRegistry | null | undefined;
 }
 
 export async function createHttpServer(
@@ -87,7 +89,7 @@ export async function createHttpServer(
   registerMcpEndpoint(app, deps.router);
 
   // Project-scoped MCP endpoint at /projects/:projectName/mcp
-  registerProjectMcpEndpoint(app, mcpdClient);
+  registerProjectMcpEndpoint(app, mcpdClient, deps.providerRegistry);
 
   return app;
 }

src/mcplocal/src/llm-config.ts

@@ -0,0 +1,93 @@
+import type { SecretStore } from '@mcpctl/shared';
+import type { LlmFileConfig } from './http/config.js';
+import { ProviderRegistry } from './providers/registry.js';
+import { GeminiCliProvider } from './providers/gemini-cli.js';
+import { OllamaProvider } from './providers/ollama.js';
+import { AnthropicProvider } from './providers/anthropic.js';
+import { OpenAiProvider } from './providers/openai.js';
+import { DeepSeekProvider } from './providers/deepseek.js';
+
+/**
+ * Create a ProviderRegistry from user config + secret store.
+ * Returns an empty registry if config is undefined or provider is 'none'.
+ */
+export async function createProviderFromConfig(
+  config: LlmFileConfig | undefined,
+  secretStore: SecretStore,
+): Promise<ProviderRegistry> {
+  const registry = new ProviderRegistry();
+  if (!config?.provider || config.provider === 'none') return registry;
+
+  switch (config.provider) {
+    case 'gemini-cli':
+      registry.register(new GeminiCliProvider({
+        binaryPath: config.binaryPath,
+        defaultModel: config.model,
+      }));
+      break;
+
+    case 'ollama':
+      registry.register(new OllamaProvider({
+        baseUrl: config.url,
+        defaultModel: config.model,
+      }));
+      break;
+
+    case 'anthropic': {
+      const apiKey = await secretStore.get('anthropic-api-key');
+      if (!apiKey) {
+        process.stderr.write('Warning: Anthropic API key not found in secret store. Run "mcpctl config setup" to configure.\n');
+        return registry;
+      }
+      registry.register(new AnthropicProvider({
+        apiKey,
+        defaultModel: config.model,
+      }));
+      break;
+    }
+
+    case 'openai': {
+      const apiKey = await secretStore.get('openai-api-key');
+      if (!apiKey) {
+        process.stderr.write('Warning: OpenAI API key not found in secret store. Run "mcpctl config setup" to configure.\n');
+        return registry;
+      }
+      registry.register(new OpenAiProvider({
+        apiKey,
+        baseUrl: config.url,
+        defaultModel: config.model,
+      }));
+      break;
+    }
+
+    case 'deepseek': {
+      const apiKey = await secretStore.get('deepseek-api-key');
+      if (!apiKey) {
+        process.stderr.write('Warning: DeepSeek API key not found in secret store. Run "mcpctl config setup" to configure.\n');
+        return registry;
+      }
+      registry.register(new DeepSeekProvider({
+        apiKey,
+        baseUrl: config.url,
+        defaultModel: config.model,
+      }));
+      break;
+    }
+
+    case 'vllm': {
+      // vLLM uses OpenAI-compatible API
+      if (!config.url) {
+        process.stderr.write('Warning: vLLM URL not configured. Run "mcpctl config setup" to configure.\n');
+        return registry;
+      }
+      registry.register(new OpenAiProvider({
+        apiKey: 'unused',
+        baseUrl: config.url,
+        defaultModel: config.model ?? 'default',
+      }));
+      break;
+    }
+  }
+
+  return registry;
+}

src/mcplocal/src/main.ts

@@ -7,8 +7,11 @@ import { StdioProxyServer } from './server.js';
 import { StdioUpstream } from './upstream/stdio.js';
 import { HttpUpstream } from './upstream/http.js';
 import { createHttpServer } from './http/server.js';
-import { loadHttpConfig } from './http/config.js';
+import { loadHttpConfig, loadLlmConfig } from './http/config.js';
 import type { HttpConfig } from './http/config.js';
+import { createProviderFromConfig } from './llm-config.js';
+import { createSecretStore } from '@mcpctl/shared';
+import type { ProviderRegistry } from './providers/registry.js';
 
 interface ParsedArgs {
   configPath: string | undefined;
@@ -55,12 +58,22 @@ export interface MainResult {
   server: StdioProxyServer;
   httpServer: FastifyInstance | undefined;
   httpConfig: HttpConfig;
+  providerRegistry: ProviderRegistry;
 }
 
 export async function main(argv: string[] = process.argv): Promise<MainResult> {
   const args = parseArgs(argv);
   const httpConfig = loadHttpConfig();
 
+  // Load LLM provider from user config + secret store
+  const llmConfig = loadLlmConfig();
+  const secretStore = await createSecretStore();
+  const providerRegistry = await createProviderFromConfig(llmConfig, secretStore);
+  const activeLlm = providerRegistry.getActive();
+  if (activeLlm) {
+    process.stderr.write(`LLM provider: ${activeLlm.name}\n`);
+  }
+
   let upstreamConfigs: UpstreamConfig[] = [];
 
   if (args.configPath) {
@@ -115,7 +128,7 @@ export async function main(argv: string[] = process.argv): Promise<MainResult> {
   // Start HTTP server unless disabled
   let httpServer: FastifyInstance | undefined;
   if (!args.noHttp) {
-    httpServer = await createHttpServer(httpConfig, { router });
+    httpServer = await createHttpServer(httpConfig, { router, providerRegistry });
     await httpServer.listen({ port: httpConfig.httpPort, host: httpConfig.httpHost });
     process.stderr.write(`mcpctl-proxy HTTP server listening on ${httpConfig.httpHost}:${httpConfig.httpPort}\n`);
   }
@@ -137,7 +150,7 @@ export async function main(argv: string[] = process.argv): Promise<MainResult> {
   process.on('SIGTERM', () => void shutdown());
   process.on('SIGINT', () => void shutdown());
 
-  return { router, server, httpServer, httpConfig };
+  return { router, server, httpServer, httpConfig, providerRegistry };
 }
 
 // Run when executed directly

src/mcplocal/tests/http/config.test.ts

@@ -0,0 +1,65 @@
+import { describe, it, expect, vi, afterEach } from 'vitest';
+import { loadLlmConfig } from '../../src/http/config.js';
+import { existsSync, readFileSync } from 'node:fs';
+
+vi.mock('node:fs', async () => {
+  const actual = await vi.importActual<typeof import('node:fs')>('node:fs');
+  return {
+    ...actual,
+    existsSync: vi.fn(),
+    readFileSync: vi.fn(),
+  };
+});
+
+afterEach(() => {
+  vi.restoreAllMocks();
+});
+
+describe('loadLlmConfig', () => {
+  it('returns undefined when config file does not exist', () => {
+    vi.mocked(existsSync).mockReturnValue(false);
+    expect(loadLlmConfig()).toBeUndefined();
+  });
+
+  it('returns undefined when config has no llm section', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockReturnValue(JSON.stringify({ mcplocalUrl: 'http://localhost:3200' }));
+    expect(loadLlmConfig()).toBeUndefined();
+  });
+
+  it('returns undefined when provider is none', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockReturnValue(JSON.stringify({ llm: { provider: 'none' } }));
+    expect(loadLlmConfig()).toBeUndefined();
+  });
+
+  it('returns LLM config when provider is configured', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockReturnValue(JSON.stringify({
+      llm: { provider: 'anthropic', model: 'claude-haiku-3-5-20241022' },
+    }));
+    const result = loadLlmConfig();
+    expect(result).toEqual({ provider: 'anthropic', model: 'claude-haiku-3-5-20241022' });
+  });
+
+  it('returns full LLM config with all fields', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockReturnValue(JSON.stringify({
+      llm: { provider: 'vllm', model: 'my-model', url: 'http://gpu:8000' },
+    }));
+    const result = loadLlmConfig();
+    expect(result).toEqual({ provider: 'vllm', model: 'my-model', url: 'http://gpu:8000' });
+  });
+
+  it('returns undefined on malformed JSON', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockReturnValue('NOT JSON!!!');
+    expect(loadLlmConfig()).toBeUndefined();
+  });
+
+  it('returns undefined on read error', () => {
+    vi.mocked(existsSync).mockReturnValue(true);
+    vi.mocked(readFileSync).mockImplementation(() => { throw new Error('EACCES'); });
+    expect(loadLlmConfig()).toBeUndefined();
+  });
+});

src/mcplocal/tests/llm-config.test.ts

@@ -0,0 +1,133 @@
+import { describe, it, expect, vi } from 'vitest';
+import { createProviderFromConfig } from '../src/llm-config.js';
+import type { SecretStore } from '@mcpctl/shared';
+
+function mockSecretStore(secrets: Record<string, string> = {}): SecretStore {
+  return {
+    get: vi.fn(async (key: string) => secrets[key] ?? null),
+    set: vi.fn(async () => {}),
+    delete: vi.fn(async () => true),
+    backend: () => 'mock',
+  };
+}
+
+describe('createProviderFromConfig', () => {
+  it('returns empty registry for undefined config', async () => {
+    const store = mockSecretStore();
+    const registry = await createProviderFromConfig(undefined, store);
+    expect(registry.getActive()).toBeNull();
+    expect(registry.list()).toEqual([]);
+  });
+
+  it('returns empty registry for provider=none', async () => {
+    const store = mockSecretStore();
+    const registry = await createProviderFromConfig({ provider: 'none' }, store);
+    expect(registry.getActive()).toBeNull();
+  });
+
+  it('creates gemini-cli provider', async () => {
+    const store = mockSecretStore();
+    const registry = await createProviderFromConfig(
+      { provider: 'gemini-cli', model: 'gemini-2.5-flash', binaryPath: '/usr/bin/gemini' },
+      store,
+    );
+    expect(registry.getActive()).not.toBeNull();
+    expect(registry.getActive()!.name).toBe('gemini-cli');
+  });
+
+  it('creates ollama provider', async () => {
+    const store = mockSecretStore();
+    const registry = await createProviderFromConfig(
+      { provider: 'ollama', model: 'llama3.2', url: 'http://localhost:11434' },
+      store,
+    );
+    expect(registry.getActive()!.name).toBe('ollama');
+  });
+
+  it('creates anthropic provider with API key from secret store', async () => {
+    const store = mockSecretStore({ 'anthropic-api-key': 'sk-ant-test' });
+    const registry = await createProviderFromConfig(
+      { provider: 'anthropic', model: 'claude-haiku-3-5-20241022' },
+      store,
+    );
+    expect(registry.getActive()!.name).toBe('anthropic');
+    expect(store.get).toHaveBeenCalledWith('anthropic-api-key');
+  });
+
+  it('returns empty registry when anthropic API key is missing', async () => {
+    const store = mockSecretStore();
+    const stderrSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
+    const registry = await createProviderFromConfig(
+      { provider: 'anthropic', model: 'claude-haiku-3-5-20241022' },
+      store,
+    );
+    expect(registry.getActive()).toBeNull();
+    expect(stderrSpy).toHaveBeenCalledWith(expect.stringContaining('Anthropic API key not found'));
+    stderrSpy.mockRestore();
+  });
+
+  it('creates openai provider with API key from secret store', async () => {
+    const store = mockSecretStore({ 'openai-api-key': 'sk-test' });
+    const registry = await createProviderFromConfig(
+      { provider: 'openai', model: 'gpt-4o', url: 'https://api.openai.com' },
+      store,
+    );
+    expect(registry.getActive()!.name).toBe('openai');
+    expect(store.get).toHaveBeenCalledWith('openai-api-key');
+  });
+
+  it('returns empty registry when openai API key is missing', async () => {
+    const store = mockSecretStore();
+    const stderrSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
+    const registry = await createProviderFromConfig(
+      { provider: 'openai' },
+      store,
+    );
+    expect(registry.getActive()).toBeNull();
+    stderrSpy.mockRestore();
+  });
+
+  it('creates deepseek provider with API key from secret store', async () => {
+    const store = mockSecretStore({ 'deepseek-api-key': 'sk-ds-test' });
+    const registry = await createProviderFromConfig(
+      { provider: 'deepseek', model: 'deepseek-chat' },
+      store,
+    );
+    expect(registry.getActive()!.name).toBe('deepseek');
+    expect(store.get).toHaveBeenCalledWith('deepseek-api-key');
+  });
+
+  it('returns empty registry when deepseek API key is missing', async () => {
+    const store = mockSecretStore();
+    const stderrSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
+    const registry = await createProviderFromConfig(
+      { provider: 'deepseek' },
+      store,
+    );
+    expect(registry.getActive()).toBeNull();
+    stderrSpy.mockRestore();
+  });
+
+  it('creates vllm provider using OpenAI provider', async () => {
+    const store = mockSecretStore();
+    const registry = await createProviderFromConfig(
+      { provider: 'vllm', model: 'my-model', url: 'http://gpu-server:8000' },
+      store,
+    );
+    // vLLM reuses OpenAI provider under the hood
+    expect(registry.getActive()).not.toBeNull();
+    expect(registry.getActive()!.name).toBe('openai');
+  });
+
+  it('returns empty registry when vllm URL is missing', async () => {
+    const store = mockSecretStore();
+    const stderrSpy = vi.spyOn(process.stderr, 'write').mockImplementation(() => true);
+    const registry = await createProviderFromConfig(
+      { provider: 'vllm' },
+      store,
+    );
+    expect(registry.getActive()).toBeNull();
+    expect(stderrSpy).toHaveBeenCalledWith(expect.stringContaining('vLLM URL not configured'));
+    stderrSpy.mockRestore();
+  });
+});