feat: tiered LLM providers (fast/heavy) with multi-provider config

Adds tier-based LLM routing so fast local models (vLLM, Ollama) handle
structured tasks while cloud models (Gemini, Anthropic) are reserved for
heavy reasoning. Single-provider configs continue to work via fallback.

- Tier type + ProviderRegistry with assignTier/getProvider/fallback chain
- Multi-provider config format: { providers: [{ name, type, tier, ... }] }
- NamedProvider wrapper for multiple instances of same provider type
- Setup wizard: Simple (legacy) / Advanced (fast+heavy tiers) modes
- Status display: tiered view with /llm/providers endpoint
- Call sites use getProvider('fast') instead of getActive()
- Full backward compatibility with existing single-provider configs

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

src/cli/tests/commands/config-setup.test.ts

@@ -67,7 +67,7 @@ async function runSetup(deps: ConfigSetupDeps): Promise<void> {
 describe('config setup wizard', () => {
   describe('provider: none', () => {
     it('disables LLM and saves config', async () => {
-      const deps = buildDeps({ answers: ['none'] });
+      const deps = buildDeps({ answers: ['simple', 'none'] });
       await runSetup(deps);
 
       const config = readConfig();
@@ -81,7 +81,7 @@ describe('config setup wizard', () => {
     it('auto-detects binary path and saves config', async () => {
       // Answers: select provider, select model (no binary prompt — auto-detected)
       const deps = buildDeps({
-        answers: ['gemini-cli', 'gemini-2.5-flash'],
+        answers: ['simple', 'gemini-cli', 'gemini-2.5-flash'],
         whichBinary: vi.fn(async () => '/home/user/.npm-global/bin/gemini'),
       });
       await runSetup(deps);
@@ -98,7 +98,7 @@ describe('config setup wizard', () => {
     it('prompts for manual path when binary not found', async () => {
       // Answers: select provider, select model, enter manual path
       const deps = buildDeps({
-        answers: ['gemini-cli', 'gemini-2.5-flash', '/opt/gemini'],
+        answers: ['simple', 'gemini-cli', 'gemini-2.5-flash', '/opt/gemini'],
         whichBinary: vi.fn(async () => null),
       });
       await runSetup(deps);
@@ -113,7 +113,7 @@ describe('config setup wizard', () => {
     it('saves gemini-cli with custom model', async () => {
       // Answers: select provider, select custom, enter model name
       const deps = buildDeps({
-        answers: ['gemini-cli', '__custom__', 'gemini-3.0-flash'],
+        answers: ['simple', 'gemini-cli', '__custom__', 'gemini-3.0-flash'],
         whichBinary: vi.fn(async () => '/usr/bin/gemini'),
       });
       await runSetup(deps);
@@ -130,7 +130,7 @@ describe('config setup wizard', () => {
       const fetchModels = vi.fn(async () => ['llama3.2', 'codellama', 'mistral']);
       // Answers: select provider, enter URL, select model
       const deps = buildDeps({
-        answers: ['ollama', 'http://localhost:11434', 'codellama'],
+        answers: ['simple', 'ollama', 'http://localhost:11434', 'codellama'],
         fetchModels,
       });
       await runSetup(deps);
@@ -148,7 +148,7 @@ describe('config setup wizard', () => {
       const fetchModels = vi.fn(async () => []);
       // Answers: select provider, enter URL, enter model manually
       const deps = buildDeps({
-        answers: ['ollama', 'http://localhost:11434', 'llama3.2'],
+        answers: ['simple', 'ollama', 'http://localhost:11434', 'llama3.2'],
         fetchModels,
       });
       await runSetup(deps);
@@ -163,7 +163,7 @@ describe('config setup wizard', () => {
     it('prompts for API key and saves to secret store', async () => {
       // Answers: select provider, enter API key, select model
       const deps = buildDeps({
-        answers: ['anthropic', 'sk-ant-new-key', 'claude-haiku-3-5-20241022'],
+        answers: ['simple', 'anthropic', 'sk-ant-new-key', 'claude-haiku-3-5-20241022'],
       });
       await runSetup(deps);
 
@@ -181,7 +181,7 @@ describe('config setup wizard', () => {
       // Answers: select provider, confirm change=false, select model
       const deps = buildDeps({
         secrets: { 'anthropic-api-key': 'sk-ant-existing-key-1234' },
-        answers: ['anthropic', false, 'claude-sonnet-4-20250514'],
+        answers: ['simple', 'anthropic', false, 'claude-sonnet-4-20250514'],
       });
       await runSetup(deps);
 
@@ -196,7 +196,7 @@ describe('config setup wizard', () => {
       // Answers: select provider, confirm change=true, enter new key, select model
       const deps = buildDeps({
         secrets: { 'anthropic-api-key': 'sk-ant-old' },
-        answers: ['anthropic', true, 'sk-ant-new', 'claude-haiku-3-5-20241022'],
+        answers: ['simple', 'anthropic', true, 'sk-ant-new', 'claude-haiku-3-5-20241022'],
       });
       await runSetup(deps);
 
@@ -210,7 +210,7 @@ describe('config setup wizard', () => {
       const fetchModels = vi.fn(async () => ['my-model', 'llama-70b']);
       // Answers: select provider, enter URL, select model
       const deps = buildDeps({
-        answers: ['vllm', 'http://gpu:8000', 'llama-70b'],
+        answers: ['simple', 'vllm', 'http://gpu:8000', 'llama-70b'],
         fetchModels,
       });
       await runSetup(deps);
@@ -229,7 +229,7 @@ describe('config setup wizard', () => {
     it('prompts for key, model, and optional custom endpoint', async () => {
       // Answers: select provider, enter key, enter model, confirm custom URL=true, enter URL
       const deps = buildDeps({
-        answers: ['openai', 'sk-openai-key', 'gpt-4o', true, 'https://custom.api.com'],
+        answers: ['simple', 'openai', 'sk-openai-key', 'gpt-4o', true, 'https://custom.api.com'],
       });
       await runSetup(deps);
 
@@ -245,7 +245,7 @@ describe('config setup wizard', () => {
     it('skips custom URL when not requested', async () => {
       // Answers: select provider, enter key, enter model, confirm custom URL=false
       const deps = buildDeps({
-        answers: ['openai', 'sk-openai-key', 'gpt-4o-mini', false],
+        answers: ['simple', 'openai', 'sk-openai-key', 'gpt-4o-mini', false],
       });
       await runSetup(deps);
 
@@ -260,7 +260,7 @@ describe('config setup wizard', () => {
     it('prompts for key and model', async () => {
       // Answers: select provider, enter key, select model
       const deps = buildDeps({
-        answers: ['deepseek', 'sk-ds-key', 'deepseek-chat'],
+        answers: ['simple', 'deepseek', 'sk-ds-key', 'deepseek-chat'],
       });
       await runSetup(deps);
 
@@ -275,7 +275,7 @@ describe('config setup wizard', () => {
 
   describe('output messages', () => {
     it('shows restart instruction', async () => {
-      const deps = buildDeps({ answers: ['gemini-cli', 'gemini-2.5-flash'] });
+      const deps = buildDeps({ answers: ['simple', 'gemini-cli', 'gemini-2.5-flash'] });
       await runSetup(deps);
 
       expect(logs.some((l) => l.includes('systemctl --user restart mcplocal'))).toBe(true);
@@ -283,7 +283,7 @@ describe('config setup wizard', () => {
     });
 
     it('shows configured provider and model', async () => {
-      const deps = buildDeps({ answers: ['gemini-cli', 'gemini-2.5-flash'] });
+      const deps = buildDeps({ answers: ['simple', 'gemini-cli', 'gemini-2.5-flash'] });
       await runSetup(deps);
 
       expect(logs.some((l) => l.includes('gemini-cli') && l.includes('gemini-2.5-flash'))).toBe(true);

src/cli/tests/commands/status.test.ts

@@ -26,6 +26,7 @@ function baseDeps(overrides?: Partial<StatusCommandDeps>): Partial<StatusCommand
     log,
     write,
     checkHealth: async () => true,
+    fetchProviders: async () => null,
     isTTY: false,
     ...overrides,
   };