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[Gemma x Gemini CLI] Add an Experimental Gemma Router that uses a LiteRT-LM shim into the Composite Model Classifier Strategy (#17231)

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Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Allen Hutchison <adh@google.com>
This commit is contained in:
Siddharth Diwan
2026-02-26 15:43:43 -08:00
committed by GitHub
parent 6dc9d5ff11
commit 9b7852f11c
29 changed files with 1456 additions and 58 deletions
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docs/cli/settings.md
+1
View File
@@ -140,6 +140,7 @@ they appear in the UI.
| Plan | `experimental.plan` | Enable planning features (Plan Mode and tools). | `false` |
| Model Steering | `experimental.modelSteering` | Enable model steering (user hints) to guide the model during tool execution. | `false` |
| Direct Web Fetch | `experimental.directWebFetch` | Enable web fetch behavior that bypasses LLM summarization. | `false` |
| Enable Gemma Model Router | `experimental.gemmaModelRouter.enabled` | Enable the Gemma Model Router. Requires a local endpoint serving Gemma via the Gemini API using LiteRT-LM shim. | `false` |
### Skills
docs/reference/configuration.md
+17
View File
@@ -1014,6 +1014,23 @@ their corresponding top-level category object in your `settings.json` file.
- **Default:** `false`
- **Requires restart:** Yes
- **`experimental.gemmaModelRouter.enabled`** (boolean):
- **Description:** Enable the Gemma Model Router. Requires a local endpoint
serving Gemma via the Gemini API using LiteRT-LM shim.
- **Default:** `false`
- **Requires restart:** Yes
- **`experimental.gemmaModelRouter.classifier.host`** (string):
- **Description:** The host of the classifier.
- **Default:** `"http://localhost:9379"`
- **Requires restart:** Yes
- **`experimental.gemmaModelRouter.classifier.model`** (string):
- **Description:** The model to use for the classifier. Only tested on
`gemma3-1b-gpu-custom`.
- **Default:** `"gemma3-1b-gpu-custom"`
- **Requires restart:** Yes
#### `skills`
- **`skills.enabled`** (boolean):
package-lock.json
Generated
+1 -25
View File
@@ -2292,7 +2292,6 @@
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"dev": true,
"license": "MIT",
"peer": true,
"dependencies": {
"@octokit/auth-token": "^6.0.0",
"@octokit/graphql": "^9.0.2",
@@ -2473,7 +2472,6 @@
"resolved": "https://registry.npmjs.org/@opentelemetry/api/-/api-1.9.0.tgz",
"integrity": "sha512-3giAOQvZiH5F9bMlMiv8+GSPMeqg0dbaeo58/0SlA9sxSqZhnUtxzX9/2FzyhS9sWQf5S0GJE0AKBrFqjpeYcg==",
"license": "Apache-2.0",
"peer": true,
"engines": {
"node": ">=8.0.0"
}
@@ -2523,7 +2521,6 @@
"resolved": "https://registry.npmjs.org/@opentelemetry/core/-/core-2.5.0.tgz",
"integrity": "sha512-ka4H8OM6+DlUhSAZpONu0cPBtPPTQKxbxVzC4CzVx5+K4JnroJVBtDzLAMx4/3CDTJXRvVFhpFjtl4SaiTNoyQ==",
"license": "Apache-2.0",
"peer": true,
"dependencies": {
"@opentelemetry/semantic-conventions": "^1.29.0"
},
@@ -2898,7 +2895,6 @@
"resolved": "https://registry.npmjs.org/@opentelemetry/resources/-/resources-2.5.0.tgz",
"integrity": "sha512-F8W52ApePshpoSrfsSk1H2yJn9aKjCrbpQF1M9Qii0GHzbfVeFUB+rc3X4aggyZD8x9Gu3Slua+s6krmq6Dt8g==",
"license": "Apache-2.0",
"peer": true,
"dependencies": {
"@opentelemetry/core": "2.5.0",
"@opentelemetry/semantic-conventions": "^1.29.0"
@@ -2932,7 +2928,6 @@
"resolved": "https://registry.npmjs.org/@opentelemetry/sdk-metrics/-/sdk-metrics-2.5.0.tgz",
"integrity": "sha512-BeJLtU+f5Gf905cJX9vXFQorAr6TAfK3SPvTFqP+scfIpDQEJfRaGJWta7sJgP+m4dNtBf9y3yvBKVAZZtJQVA==",
"license": "Apache-2.0",
"peer": true,
"dependencies": {
"@opentelemetry/core": "2.5.0",
"@opentelemetry/resources": "2.5.0"
@@ -2987,7 +2982,6 @@
"resolved": "https://registry.npmjs.org/@opentelemetry/sdk-trace-base/-/sdk-trace-base-2.5.0.tgz",
"integrity": "sha512-VzRf8LzotASEyNDUxTdaJ9IRJ1/h692WyArDBInf5puLCjxbICD6XkHgpuudis56EndyS7LYFmtTMny6UABNdQ==",
"license": "Apache-2.0",
"peer": true,
"dependencies": {
"@opentelemetry/core": "2.5.0",
"@opentelemetry/resources": "2.5.0",
@@ -4184,7 +4178,6 @@
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"devOptional": true,
"license": "MIT",
"peer": true,
"dependencies": {
"csstype": "^3.0.2"
}
@@ -4458,7 +4451,6 @@
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"dev": true,
"license": "MIT",
"peer": true,
"dependencies": {
"@typescript-eslint/scope-manager": "8.56.1",
"@typescript-eslint/types": "8.56.1",
@@ -5306,7 +5298,6 @@
"resolved": "https://registry.npmjs.org/acorn/-/acorn-8.15.0.tgz",
"integrity": "sha512-NZyJarBfL7nWwIq+FDL6Zp/yHEhePMNnnJ0y3qfieCrmNvYct8uvtiV41UvlSe6apAfk0fY1FbWx+NwfmpvtTg==",
"license": "MIT",
"peer": true,
"bin": {
"acorn": "bin/acorn"
},
@@ -7860,7 +7851,6 @@
"integrity": "sha512-VmQ+sifHUbI/IcSopBCF/HO3YiHQx/AVd3UVyYL6weuwW+HvON9VYn5l6Zl1WZzPWXPNZrSQpxwkkZ/VuvJZzg==",
"dev": true,
"license": "MIT",
"peer": true,
"dependencies": {
"@eslint-community/eslint-utils": "^4.8.0",
"@eslint-community/regexpp": "^4.12.1",
@@ -8493,7 +8483,6 @@
"resolved": "https://registry.npmjs.org/express/-/express-5.2.1.tgz",
"integrity": "sha512-hIS4idWWai69NezIdRt2xFVofaF4j+6INOpJlVOLDO8zXGpUVEVzIYk12UUi2JzjEzWL3IOAxcTubgz9Po0yXw==",
"license": "MIT",
"peer": true,
"dependencies": {
"accepts": "^2.0.0",
"body-parser": "^2.2.1",
@@ -9788,7 +9777,6 @@
"resolved": "https://registry.npmjs.org/hono/-/hono-4.12.2.tgz",
"integrity": "sha512-gJnaDHXKDayjt8ue0n8Gs0A007yKXj4Xzb8+cNjZeYsSzzwKc0Lr+OZgYwVfB0pHfUs17EPoLvrOsEaJ9mj+Tg==",
"license": "MIT",
"peer": true,
"engines": {
"node": ">=16.9.0"
}
@@ -10068,7 +10056,6 @@
"resolved": "https://registry.npmjs.org/@jrichman/ink/-/ink-6.4.11.tgz",
"integrity": "sha512-93LQlzT7vvZ1XJcmOMwN4s+6W334QegendeHOMnEJBlhnpIzr8bws6/aOEHG8ZCuVD/vNeeea5m1msHIdAY6ig==",
"license": "MIT",
"peer": true,
"dependencies": {
"@alcalzone/ansi-tokenize": "^0.2.1",
"ansi-escapes": "^7.0.0",
@@ -13718,7 +13705,6 @@
"resolved": "https://registry.npmjs.org/react/-/react-19.2.4.tgz",
"integrity": "sha512-9nfp2hYpCwOjAN+8TZFGhtWEwgvWHXqESH8qT89AT/lWklpLON22Lc8pEtnpsZz7VmawabSU0gCjnj8aC0euHQ==",
"license": "MIT",
"peer": true,
"engines": {
"node": ">=0.10.0"
}
@@ -13729,7 +13715,6 @@
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"devOptional": true,
"license": "MIT",
"peer": true,
"dependencies": {
"shell-quote": "^1.6.1",
"ws": "^7"
@@ -15689,7 +15674,6 @@
"resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
"license": "MIT",
"peer": true,
"engines": {
"node": ">=12"
},
@@ -15913,8 +15897,7 @@
"resolved": "https://registry.npmjs.org/tslib/-/tslib-2.8.1.tgz",
"integrity": "sha512-oJFu94HQb+KVduSUQL7wnpmqnfmLsOA/nAh6b6EH0wCEoK0/mPeXU6c3wKDV83MkOuHPRHtSXKKU99IBazS/2w==",
"dev": true,
"license": "0BSD",
"peer": true
"license": "0BSD"
},
"node_modules/tsx": {
"version": "4.20.3",
@@ -15922,7 +15905,6 @@
"integrity": "sha512-qjbnuR9Tr+FJOMBqJCW5ehvIo/buZq7vH7qD7JziU98h6l3qGy0a/yPFjwO+y0/T7GFpNgNAvEcPPVfyT8rrPQ==",
"devOptional": true,
"license": "MIT",
"peer": true,
"dependencies": {
"esbuild": "~0.25.0",
"get-tsconfig": "^4.7.5"
@@ -16082,7 +16064,6 @@
"integrity": "sha512-p1diW6TqL9L07nNxvRMM7hMMw4c5XOo/1ibL4aAIGmSAt9slTE1Xgw5KWuof2uTOvCg9BY7ZRi+GaF+7sfgPeQ==",
"devOptional": true,
"license": "Apache-2.0",
"peer": true,
"bin": {
"tsc": "bin/tsc",
"tsserver": "bin/tsserver"
@@ -16291,7 +16272,6 @@
"resolved": "https://registry.npmjs.org/vite/-/vite-7.2.2.tgz",
"integrity": "sha512-BxAKBWmIbrDgrokdGZH1IgkIk/5mMHDreLDmCJ0qpyJaAteP8NvMhkwr/ZCQNqNH97bw/dANTE9PDzqwJghfMQ==",
"license": "MIT",
"peer": true,
"dependencies": {
"esbuild": "^0.25.0",
"fdir": "^6.5.0",
@@ -16405,7 +16385,6 @@
"resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
"license": "MIT",
"peer": true,
"engines": {
"node": ">=12"
},
@@ -16418,7 +16397,6 @@
"resolved": "https://registry.npmjs.org/vitest/-/vitest-3.2.4.tgz",
"integrity": "sha512-LUCP5ev3GURDysTWiP47wRRUpLKMOfPh+yKTx3kVIEiu5KOMeqzpnYNsKyOoVrULivR8tLcks4+lga33Whn90A==",
"license": "MIT",
"peer": true,
"dependencies": {
"@types/chai": "^5.2.2",
"@vitest/expect": "3.2.4",
@@ -17063,7 +17041,6 @@
"resolved": "https://registry.npmjs.org/zod/-/zod-3.25.76.tgz",
"integrity": "sha512-gzUt/qt81nXsFGKIFcC3YnfEAx5NkunCfnDlvuBSSFS02bcXu4Lmea0AFIUwbLWxWPx3d9p8S5QoaujKcNQxcQ==",
"license": "MIT",
"peer": true,
"funding": {
"url": "https://github.com/sponsors/colinhacks"
}
@@ -17463,7 +17440,6 @@
"resolved": "https://registry.npmjs.org/picomatch/-/picomatch-4.0.3.tgz",
"integrity": "sha512-5gTmgEY/sqK6gFXLIsQNH19lWb4ebPDLA4SdLP7dsWkIXHWlG66oPuVvXSGFPppYZz8ZDZq0dYYrbHfBCVUb1Q==",
"license": "MIT",
"peer": true,
"engines": {
"node": ">=12"
},
packages/cli/src/config/config.test.ts
+60
View File
@@ -2765,6 +2765,66 @@ describe('loadCliConfig approval mode', () => {
});
});
describe('loadCliConfig gemmaModelRouter', () => {
beforeEach(() => {
vi.resetAllMocks();
vi.mocked(os.homedir).mockReturnValue('/mock/home/user');
vi.stubEnv('GEMINI_API_KEY', 'test-api-key');
vi.spyOn(ExtensionManager.prototype, 'getExtensions').mockReturnValue([]);
});
afterEach(() => {
vi.unstubAllEnvs();
vi.restoreAllMocks();
});
it('should have gemmaModelRouter disabled by default', async () => {
process.argv = ['node', 'script.js'];
const argv = await parseArguments(createTestMergedSettings());
const settings = createTestMergedSettings();
const config = await loadCliConfig(settings, 'test-session', argv);
expect(config.getGemmaModelRouterEnabled()).toBe(false);
});
it('should load gemmaModelRouter settings from merged settings', async () => {
process.argv = ['node', 'script.js'];
const argv = await parseArguments(createTestMergedSettings());
const settings = createTestMergedSettings({
experimental: {
gemmaModelRouter: {
enabled: true,
classifier: {
host: 'http://custom:1234',
model: 'custom-gemma',
},
},
},
});
const config = await loadCliConfig(settings, 'test-session', argv);
expect(config.getGemmaModelRouterEnabled()).toBe(true);
const gemmaSettings = config.getGemmaModelRouterSettings();
expect(gemmaSettings.classifier?.host).toBe('http://custom:1234');
expect(gemmaSettings.classifier?.model).toBe('custom-gemma');
});
it('should handle partial gemmaModelRouter settings', async () => {
process.argv = ['node', 'script.js'];
const argv = await parseArguments(createTestMergedSettings());
const settings = createTestMergedSettings({
experimental: {
gemmaModelRouter: {
enabled: true,
},
},
});
const config = await loadCliConfig(settings, 'test-session', argv);
expect(config.getGemmaModelRouterEnabled()).toBe(true);
const gemmaSettings = config.getGemmaModelRouterSettings();
expect(gemmaSettings.classifier?.host).toBe('http://localhost:9379');
expect(gemmaSettings.classifier?.model).toBe('gemma3-1b-gpu-custom');
});
});
describe('loadCliConfig fileFiltering', () => {
const originalArgv = process.argv;
packages/cli/src/config/config.ts
+1
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@@ -856,6 +856,7 @@ export async function loadCliConfig(
// eslint-disable-next-line @typescript-eslint/no-unsafe-type-assertion
format: (argv.outputFormat ?? settings.output?.format) as OutputFormat,
},
gemmaModelRouter: settings.experimental?.gemmaModelRouter,
fakeResponses: argv.fakeResponses,
recordResponses: argv.recordResponses,
retryFetchErrors: settings.general?.retryFetchErrors,
packages/cli/src/config/settingsSchema.test.ts
+54
View File
@@ -444,6 +444,60 @@ describe('SettingsSchema', () => {
expect(hookItemProperties.description).toBeDefined();
expect(hookItemProperties.description.type).toBe('string');
});
it('should have gemmaModelRouter setting in schema', () => {
const gemmaModelRouter =
getSettingsSchema().experimental.properties.gemmaModelRouter;
expect(gemmaModelRouter).toBeDefined();
expect(gemmaModelRouter.type).toBe('object');
expect(gemmaModelRouter.category).toBe('Experimental');
expect(gemmaModelRouter.default).toEqual({});
expect(gemmaModelRouter.requiresRestart).toBe(true);
expect(gemmaModelRouter.showInDialog).toBe(true);
expect(gemmaModelRouter.description).toBe(
'Enable Gemma model router (experimental).',
);
const enabled = gemmaModelRouter.properties.enabled;
expect(enabled).toBeDefined();
expect(enabled.type).toBe('boolean');
expect(enabled.category).toBe('Experimental');
expect(enabled.default).toBe(false);
expect(enabled.requiresRestart).toBe(true);
expect(enabled.showInDialog).toBe(true);
expect(enabled.description).toBe(
'Enable the Gemma Model Router. Requires a local endpoint serving Gemma via the Gemini API using LiteRT-LM shim.',
);
const classifier = gemmaModelRouter.properties.classifier;
expect(classifier).toBeDefined();
expect(classifier.type).toBe('object');
expect(classifier.category).toBe('Experimental');
expect(classifier.default).toEqual({});
expect(classifier.requiresRestart).toBe(true);
expect(classifier.showInDialog).toBe(false);
expect(classifier.description).toBe('Classifier configuration.');
const host = classifier.properties.host;
expect(host).toBeDefined();
expect(host.type).toBe('string');
expect(host.category).toBe('Experimental');
expect(host.default).toBe('http://localhost:9379');
expect(host.requiresRestart).toBe(true);
expect(host.showInDialog).toBe(false);
expect(host.description).toBe('The host of the classifier.');
const model = classifier.properties.model;
expect(model).toBeDefined();
expect(model.type).toBe('string');
expect(model.category).toBe('Experimental');
expect(model.default).toBe('gemma3-1b-gpu-custom');
expect(model.requiresRestart).toBe(true);
expect(model.showInDialog).toBe(false);
expect(model.description).toBe(
'The model to use for the classifier. Only tested on `gemma3-1b-gpu-custom`.',
);
});
});
it('has JSON schema definitions for every referenced ref', () => {
packages/cli/src/config/settingsSchema.ts
+57 -2
View File
@@ -1787,6 +1787,57 @@ const SETTINGS_SCHEMA = {
'Enable web fetch behavior that bypasses LLM summarization.',
showInDialog: true,
},
gemmaModelRouter: {
type: 'object',
label: 'Gemma Model Router',
category: 'Experimental',
requiresRestart: true,
default: {},
description: 'Enable Gemma model router (experimental).',
showInDialog: true,
properties: {
enabled: {
type: 'boolean',
label: 'Enable Gemma Model Router',
category: 'Experimental',
requiresRestart: true,
default: false,
description:
'Enable the Gemma Model Router. Requires a local endpoint serving Gemma via the Gemini API using LiteRT-LM shim.',
showInDialog: true,
},
classifier: {
type: 'object',
label: 'Classifier',
category: 'Experimental',
requiresRestart: true,
default: {},
description: 'Classifier configuration.',
showInDialog: false,
properties: {
host: {
type: 'string',
label: 'Host',
category: 'Experimental',
requiresRestart: true,
default: 'http://localhost:9379',
description: 'The host of the classifier.',
showInDialog: false,
},
model: {
type: 'string',
label: 'Model',
category: 'Experimental',
requiresRestart: true,
default: 'gemma3-1b-gpu-custom',
description:
'The model to use for the classifier. Only tested on `gemma3-1b-gpu-custom`.',
showInDialog: false,
},
},
},
},
},
},
},
@@ -2532,7 +2583,9 @@ type InferSettings<T extends SettingsSchema> = {
: T[K]['default']
: T[K]['default'] extends boolean
? boolean
: T[K]['default'];
: T[K]['default'] extends string
? string
: T[K]['default'];
};
type InferMergedSettings<T extends SettingsSchema> = {
@@ -2544,7 +2597,9 @@ type InferMergedSettings<T extends SettingsSchema> = {
: T[K]['default']
: T[K]['default'] extends boolean
? boolean
: T[K]['default'];
: T[K]['default'] extends string
? string
: T[K]['default'];
};
export type Settings = InferSettings<SettingsSchemaType>;
packages/core/src/config/config.test.ts
+140
View File
@@ -225,8 +225,10 @@ import type {
} from '../services/modelConfigService.js';
import { ExitPlanModeTool } from '../tools/exit-plan-mode.js';
import { EnterPlanModeTool } from '../tools/enter-plan-mode.js';
import { LocalLiteRtLmClient } from '../core/localLiteRtLmClient.js';
vi.mock('../core/baseLlmClient.js');
vi.mock('../core/localLiteRtLmClient.js');
vi.mock('../core/tokenLimits.js', () => ({
tokenLimit: vi.fn(),
}));
@@ -1418,6 +1420,79 @@ describe('Server Config (config.ts)', () => {
});
});
describe('GemmaModelRouterSettings', () => {
const MODEL = DEFAULT_GEMINI_MODEL;
const SANDBOX: SandboxConfig = {
command: 'docker',
image: 'gemini-cli-sandbox',
};
const TARGET_DIR = '/path/to/target';
const DEBUG_MODE = false;
const QUESTION = 'test question';
const USER_MEMORY = 'Test User Memory';
const TELEMETRY_SETTINGS = { enabled: false };
const EMBEDDING_MODEL = 'gemini-embedding';
const SESSION_ID = 'test-session-id';
const baseParams: ConfigParameters = {
cwd: '/tmp',
embeddingModel: EMBEDDING_MODEL,
sandbox: SANDBOX,
targetDir: TARGET_DIR,
debugMode: DEBUG_MODE,
question: QUESTION,
userMemory: USER_MEMORY,
telemetry: TELEMETRY_SETTINGS,
sessionId: SESSION_ID,
model: MODEL,
usageStatisticsEnabled: false,
};
it('should default gemmaModelRouter.enabled to false', () => {
const config = new Config(baseParams);
expect(config.getGemmaModelRouterEnabled()).toBe(false);
});
it('should return default gemma model router settings when not provided', () => {
const config = new Config(baseParams);
const settings = config.getGemmaModelRouterSettings();
expect(settings.enabled).toBe(false);
expect(settings.classifier?.host).toBe('http://localhost:9379');
expect(settings.classifier?.model).toBe('gemma3-1b-gpu-custom');
});
it('should override default gemma model router settings when provided', () => {
const params: ConfigParameters = {
...baseParams,
gemmaModelRouter: {
enabled: true,
classifier: {
host: 'http://custom:1234',
model: 'custom-gemma',
},
},
};
const config = new Config(params);
const settings = config.getGemmaModelRouterSettings();
expect(settings.enabled).toBe(true);
expect(settings.classifier?.host).toBe('http://custom:1234');
expect(settings.classifier?.model).toBe('custom-gemma');
});
it('should merge partial gemma model router settings with defaults', () => {
const params: ConfigParameters = {
...baseParams,
gemmaModelRouter: {
enabled: true,
},
};
const config = new Config(params);
const settings = config.getGemmaModelRouterSettings();
expect(settings.enabled).toBe(true);
expect(settings.classifier?.host).toBe('http://localhost:9379');
expect(settings.classifier?.model).toBe('gemma3-1b-gpu-custom');
});
});
describe('setApprovalMode with folder trust', () => {
const baseParams: ConfigParameters = {
sessionId: 'test',
@@ -2069,6 +2144,71 @@ describe('Config getHooks', () => {
});
});
describe('LocalLiteRtLmClient Lifecycle', () => {
const MODEL = 'gemini-pro';
const SANDBOX: SandboxConfig = {
command: 'docker',
image: 'gemini-cli-sandbox',
};
const TARGET_DIR = '/path/to/target';
const DEBUG_MODE = false;
const QUESTION = 'test question';
const USER_MEMORY = 'Test User Memory';
const TELEMETRY_SETTINGS = { enabled: false };
const EMBEDDING_MODEL = 'gemini-embedding';
const SESSION_ID = 'test-session-id';
const baseParams: ConfigParameters = {
cwd: '/tmp',
embeddingModel: EMBEDDING_MODEL,
sandbox: SANDBOX,
targetDir: TARGET_DIR,
debugMode: DEBUG_MODE,
question: QUESTION,
userMemory: USER_MEMORY,
telemetry: TELEMETRY_SETTINGS,
sessionId: SESSION_ID,
model: MODEL,
usageStatisticsEnabled: false,
};
beforeEach(() => {
vi.clearAllMocks();
vi.mocked(getExperiments).mockResolvedValue({
experimentIds: [],
flags: {},
});
});
it('should successfully initialize LocalLiteRtLmClient on first call and reuse it', () => {
const config = new Config(baseParams);
const client1 = config.getLocalLiteRtLmClient();
const client2 = config.getLocalLiteRtLmClient();
expect(client1).toBeDefined();
expect(client1).toBe(client2); // Should return the same instance
});
it('should configure LocalLiteRtLmClient with settings from getGemmaModelRouterSettings', () => {
const customHost = 'http://my-custom-host:9999';
const customModel = 'my-custom-gemma-model';
const params: ConfigParameters = {
...baseParams,
gemmaModelRouter: {
enabled: true,
classifier: {
host: customHost,
model: customModel,
},
},
};
const config = new Config(params);
config.getLocalLiteRtLmClient();
expect(LocalLiteRtLmClient).toHaveBeenCalledWith(config);
});
});
describe('Config getExperiments', () => {
const baseParams: ConfigParameters = {
cwd: '/tmp',
packages/core/src/config/config.ts
+38
View File
@@ -38,6 +38,7 @@ import { ExitPlanModeTool } from '../tools/exit-plan-mode.js';
import { EnterPlanModeTool } from '../tools/enter-plan-mode.js';
import { GeminiClient } from '../core/client.js';
import { BaseLlmClient } from '../core/baseLlmClient.js';
import { LocalLiteRtLmClient } from '../core/localLiteRtLmClient.js';
import type { HookDefinition, HookEventName } from '../hooks/types.js';
import { FileDiscoveryService } from '../services/fileDiscoveryService.js';
import { GitService } from '../services/gitService.js';
@@ -178,6 +179,14 @@ export interface ToolOutputMaskingConfig {
protectLatestTurn: boolean;
}
export interface GemmaModelRouterSettings {
enabled?: boolean;
classifier?: {
host?: string;
model?: string;
};
}
export interface ExtensionSetting {
name: string;
description: string;
@@ -509,6 +518,7 @@ export interface ConfigParameters {
directWebFetch?: boolean;
policyUpdateConfirmationRequest?: PolicyUpdateConfirmationRequest;
output?: OutputSettings;
gemmaModelRouter?: GemmaModelRouterSettings;
disableModelRouterForAuth?: AuthType[];
continueOnFailedApiCall?: boolean;
retryFetchErrors?: boolean;
@@ -599,6 +609,7 @@ export class Config {
private readonly usageStatisticsEnabled: boolean;
private geminiClient!: GeminiClient;
private baseLlmClient!: BaseLlmClient;
private localLiteRtLmClient?: LocalLiteRtLmClient;
private modelRouterService: ModelRouterService;
private readonly modelAvailabilityService: ModelAvailabilityService;
private readonly fileFiltering: {
@@ -694,6 +705,9 @@ export class Config {
| PolicyUpdateConfirmationRequest
| undefined;
private readonly outputSettings: OutputSettings;
private readonly gemmaModelRouter: GemmaModelRouterSettings;
private readonly continueOnFailedApiCall: boolean;
private readonly retryFetchErrors: boolean;
private readonly maxAttempts: number;
@@ -942,6 +956,15 @@ export class Config {
this.outputSettings = {
format: params.output?.format ?? OutputFormat.TEXT,
};
this.gemmaModelRouter = {
enabled: params.gemmaModelRouter?.enabled ?? false,
classifier: {
host:
params.gemmaModelRouter?.classifier?.host ?? 'http://localhost:9379',
model:
params.gemmaModelRouter?.classifier?.model ?? 'gemma3-1b-gpu-custom',
},
};
this.retryFetchErrors = params.retryFetchErrors ?? false;
this.maxAttempts = Math.min(
params.maxAttempts ?? DEFAULT_MAX_ATTEMPTS,
@@ -1245,6 +1268,13 @@ export class Config {
return this.baseLlmClient;
}
getLocalLiteRtLmClient(): LocalLiteRtLmClient {
if (!this.localLiteRtLmClient) {
this.localLiteRtLmClient = new LocalLiteRtLmClient(this);
}
return this.localLiteRtLmClient;
}
getSessionId(): string {
return this.sessionId;
}
@@ -2578,6 +2608,14 @@ export class Config {
return this.enableHooksUI;
}
getGemmaModelRouterEnabled(): boolean {
return this.gemmaModelRouter.enabled ?? false;
}
getGemmaModelRouterSettings(): GemmaModelRouterSettings {
return this.gemmaModelRouter;
}
/**
* Get override settings for a specific agent.
* Reads from agents.overrides.<agentName>.
packages/core/src/core/localLiteRtLmClient.test.ts
+125
View File
@@ -0,0 +1,125 @@
/**
* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { LocalLiteRtLmClient } from './localLiteRtLmClient.js';
import type { Config } from '../config/config.js';
const mockGenerateContent = vi.fn();
vi.mock('@google/genai', () => {
const GoogleGenAI = vi.fn().mockImplementation(() => ({
models: {
generateContent: mockGenerateContent,
},
}));
return { GoogleGenAI };
});
describe('LocalLiteRtLmClient', () => {
let mockConfig: Config;
beforeEach(() => {
vi.clearAllMocks();
mockGenerateContent.mockClear();
mockConfig = {
getGemmaModelRouterSettings: vi.fn().mockReturnValue({
classifier: {
host: 'http://test-host:1234',
model: 'gemma:latest',
},
}),
} as unknown as Config;
});
it('should successfully call generateJson and return parsed JSON', async () => {
mockGenerateContent.mockResolvedValue({
text: '{"key": "value"}',
});
const client = new LocalLiteRtLmClient(mockConfig);
const result = await client.generateJson([], 'test-instruction');
expect(result).toEqual({ key: 'value' });
expect(mockGenerateContent).toHaveBeenCalledWith(
expect.objectContaining({
model: 'gemma:latest',
config: expect.objectContaining({
responseMimeType: 'application/json',
temperature: 0,
}),
}),
);
});
it('should throw an error if the API response has no text', async () => {
mockGenerateContent.mockResolvedValue({
text: null,
});
const client = new LocalLiteRtLmClient(mockConfig);
await expect(client.generateJson([], 'test-instruction')).rejects.toThrow(
'Invalid response from Local Gemini API: No text found',
);
});
it('should throw if the JSON is malformed', async () => {
mockGenerateContent.mockResolvedValue({
text: `{
“key”: ‘value’,
}`, // Smart quotes, trailing comma
});
const client = new LocalLiteRtLmClient(mockConfig);
await expect(client.generateJson([], 'test-instruction')).rejects.toThrow(
SyntaxError,
);
});
it('should add reminder to the last user message', async () => {
mockGenerateContent.mockResolvedValue({
text: '{"key": "value"}',
});
const client = new LocalLiteRtLmClient(mockConfig);
await client.generateJson(
[{ role: 'user', parts: [{ text: 'initial prompt' }] }],
'test-instruction',
'test-reminder',
);
const calledContents =
vi.mocked(mockGenerateContent).mock.calls[0][0].contents;
expect(calledContents.at(-1)?.parts[0].text).toBe(
`initial prompt
test-reminder`,
);
});
it('should pass abortSignal to generateContent', async () => {
mockGenerateContent.mockResolvedValue({
text: '{"key": "value"}',
});
const client = new LocalLiteRtLmClient(mockConfig);
const controller = new AbortController();
await client.generateJson(
[],
'test-instruction',
undefined,
controller.signal,
);
expect(mockGenerateContent).toHaveBeenCalledWith(
expect.objectContaining({
config: expect.objectContaining({
abortSignal: controller.signal,
}),
}),
);
});
});
packages/core/src/core/localLiteRtLmClient.ts
+96
View File
@@ -0,0 +1,96 @@
/**
* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { GoogleGenAI } from '@google/genai';
import type { Config } from '../config/config.js';
import { debugLogger } from '../utils/debugLogger.js';
import type { Content } from '@google/genai';
/**
* A client for making single, non-streaming calls to a local Gemini-compatible API
* and expecting a JSON response.
*/
export class LocalLiteRtLmClient {
private readonly host: string;
private readonly model: string;
private readonly client: GoogleGenAI;
constructor(config: Config) {
const gemmaModelRouterSettings = config.getGemmaModelRouterSettings();
this.host = gemmaModelRouterSettings.classifier!.host!;
this.model = gemmaModelRouterSettings.classifier!.model!;
this.client = new GoogleGenAI({
// The LiteRT-LM server does not require an API key, but the SDK requires one to be set even for local endpoints. This is a dummy value and is not used for authentication.
apiKey: 'no-api-key-needed',
httpOptions: {
baseUrl: this.host,
// If the LiteRT-LM server is started but the wrong port is set, there will be a lengthy TCP timeout (here fixed to be 10 seconds).
// If the LiteRT-LM server is not started, there will be an immediate connection refusal.
// If the LiteRT-LM server is started and the model is unsupported or not downloaded, the server will return an error immediately.
// If the model's context window is exceeded, the server will return an error immediately.
timeout: 10000,
},
});
}
/**
* Sends a prompt to the local Gemini model and expects a JSON object in response.
* @param contents The history and current prompt.
* @param systemInstruction The system prompt.
* @returns A promise that resolves to the parsed JSON object.
*/
async generateJson(
contents: Content[],
systemInstruction: string,
reminder?: string,
abortSignal?: AbortSignal,
): Promise<object> {
const geminiContents = contents.map((c) => ({
role: c.role,
parts: c.parts ? c.parts.map((p) => ({ text: p.text })) : [],
}));
if (reminder) {
const lastContent = geminiContents.at(-1);
if (lastContent?.role === 'user' && lastContent.parts?.[0]?.text) {
lastContent.parts[0].text += `\n\n${reminder}`;
}
}
try {
const result = await this.client.models.generateContent({
model: this.model,
contents: geminiContents,
config: {
responseMimeType: 'application/json',
systemInstruction: systemInstruction
? { parts: [{ text: systemInstruction }] }
: undefined,
temperature: 0,
maxOutputTokens: 256,
abortSignal,
},
});
const text = result.text;
if (!text) {
throw new Error(
'Invalid response from Local Gemini API: No text found',
);
}
// eslint-disable-next-line @typescript-eslint/no-unsafe-return
return JSON.parse(result.text);
} catch (error) {
debugLogger.error(
`[LocalLiteRtLmClient] Failed to generate content:`,
error,
);
throw error;
}
}
}
packages/core/src/routing/modelRouterService.test.ts
+46
View File
@@ -9,6 +9,7 @@ import { ModelRouterService } from './modelRouterService.js';
import { Config } from '../config/config.js';
import type { BaseLlmClient } from '../core/baseLlmClient.js';
import type { LocalLiteRtLmClient } from '../core/localLiteRtLmClient.js';
import type { RoutingContext, RoutingDecision } from './routingStrategy.js';
import { DefaultStrategy } from './strategies/defaultStrategy.js';
import { CompositeStrategy } from './strategies/compositeStrategy.js';
@@ -19,6 +20,7 @@ import { ClassifierStrategy } from './strategies/classifierStrategy.js';
import { NumericalClassifierStrategy } from './strategies/numericalClassifierStrategy.js';
import { logModelRouting } from '../telemetry/loggers.js';
import { ModelRoutingEvent } from '../telemetry/types.js';
import { GemmaClassifierStrategy } from './strategies/gemmaClassifierStrategy.js';
import { ApprovalMode } from '../policy/types.js';
vi.mock('../config/config.js');
@@ -30,6 +32,7 @@ vi.mock('./strategies/overrideStrategy.js');
vi.mock('./strategies/approvalModeStrategy.js');
vi.mock('./strategies/classifierStrategy.js');
vi.mock('./strategies/numericalClassifierStrategy.js');
vi.mock('./strategies/gemmaClassifierStrategy.js');
vi.mock('../telemetry/loggers.js');
vi.mock('../telemetry/types.js');
@@ -37,6 +40,7 @@ describe('ModelRouterService', () => {
let service: ModelRouterService;
let mockConfig: Config;
let mockBaseLlmClient: BaseLlmClient;
let mockLocalLiteRtLmClient: LocalLiteRtLmClient;
let mockContext: RoutingContext;
let mockCompositeStrategy: CompositeStrategy;
@@ -45,9 +49,20 @@ describe('ModelRouterService', () => {
mockConfig = new Config({} as never);
mockBaseLlmClient = {} as BaseLlmClient;
mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
vi.spyOn(mockConfig, 'getBaseLlmClient').mockReturnValue(mockBaseLlmClient);
vi.spyOn(mockConfig, 'getLocalLiteRtLmClient').mockReturnValue(
mockLocalLiteRtLmClient,
);
vi.spyOn(mockConfig, 'getNumericalRoutingEnabled').mockResolvedValue(false);
vi.spyOn(mockConfig, 'getClassifierThreshold').mockResolvedValue(undefined);
vi.spyOn(mockConfig, 'getGemmaModelRouterSettings').mockReturnValue({
enabled: false,
classifier: {
host: 'http://localhost:1234',
model: 'gemma3-1b-gpu-custom',
},
});
vi.spyOn(mockConfig, 'getApprovalMode').mockReturnValue(
ApprovalMode.DEFAULT,
);
@@ -96,6 +111,36 @@ describe('ModelRouterService', () => {
expect(compositeStrategyArgs[1]).toBe('agent-router');
});
it('should include GemmaClassifierStrategy when enabled', () => {
// Override the default mock for this specific test
vi.spyOn(mockConfig, 'getGemmaModelRouterSettings').mockReturnValue({
enabled: true,
classifier: {
host: 'http://localhost:1234',
model: 'gemma3-1b-gpu-custom',
},
});
// Clear previous mock calls from beforeEach
vi.mocked(CompositeStrategy).mockClear();
// Re-initialize the service to pick up the new config
service = new ModelRouterService(mockConfig);
const compositeStrategyArgs = vi.mocked(CompositeStrategy).mock.calls[0];
const childStrategies = compositeStrategyArgs[0];
expect(childStrategies.length).toBe(7);
expect(childStrategies[0]).toBeInstanceOf(FallbackStrategy);
expect(childStrategies[1]).toBeInstanceOf(OverrideStrategy);
expect(childStrategies[2]).toBeInstanceOf(ApprovalModeStrategy);
expect(childStrategies[3]).toBeInstanceOf(GemmaClassifierStrategy);
expect(childStrategies[4]).toBeInstanceOf(ClassifierStrategy);
expect(childStrategies[5]).toBeInstanceOf(NumericalClassifierStrategy);
expect(childStrategies[6]).toBeInstanceOf(DefaultStrategy);
expect(compositeStrategyArgs[1]).toBe('agent-router');
});
describe('route()', () => {
const strategyDecision: RoutingDecision = {
model: 'strategy-chosen-model',
@@ -117,6 +162,7 @@ describe('ModelRouterService', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual(strategyDecision);
});
packages/core/src/routing/modelRouterService.ts
+27 -10
View File
@@ -4,10 +4,12 @@
* SPDX-License-Identifier: Apache-2.0
*/
import { GemmaClassifierStrategy } from './strategies/gemmaClassifierStrategy.js';
import type { Config } from '../config/config.js';
import type {
RoutingContext,
RoutingDecision,
RoutingStrategy,
TerminalStrategy,
} from './routingStrategy.js';
import { DefaultStrategy } from './strategies/defaultStrategy.js';
@@ -35,17 +37,31 @@ export class ModelRouterService {
}
private initializeDefaultStrategy(): TerminalStrategy {
// Initialize the composite strategy with the desired priority order.
// The strategies are ordered in order of highest priority.
const strategies: RoutingStrategy[] = [];
// Order matters here. Fallback and override are checked first.
strategies.push(new FallbackStrategy());
strategies.push(new OverrideStrategy());
// Approval mode is next.
strategies.push(new ApprovalModeStrategy());
// Then, if enabled, the Gemma classifier is used.
if (this.config.getGemmaModelRouterSettings()?.enabled) {
strategies.push(new GemmaClassifierStrategy());
}
// The generic classifier is next.
strategies.push(new ClassifierStrategy());
// The numerical classifier is next.
strategies.push(new NumericalClassifierStrategy());
// The default strategy is the terminal strategy.
const terminalStrategy = new DefaultStrategy();
return new CompositeStrategy(
[
new FallbackStrategy(),
new OverrideStrategy(),
new ApprovalModeStrategy(),
new ClassifierStrategy(),
new NumericalClassifierStrategy(),
new DefaultStrategy(),
],
[...strategies, terminalStrategy],
'agent-router',
);
}
@@ -75,6 +91,7 @@ export class ModelRouterService {
context,
this.config,
this.config.getBaseLlmClient(),
this.config.getLocalLiteRtLmClient(),
);
debugLogger.debug(
packages/core/src/routing/routingStrategy.ts
+3
View File
@@ -7,6 +7,7 @@
import type { Content, PartListUnion } from '@google/genai';
import type { BaseLlmClient } from '../core/baseLlmClient.js';
import type { Config } from '../config/config.js';
import type { LocalLiteRtLmClient } from '../core/localLiteRtLmClient.js';
/**
* The output of a routing decision. It specifies which model to use and why.
@@ -58,6 +59,7 @@ export interface RoutingStrategy {
context: RoutingContext,
config: Config,
baseLlmClient: BaseLlmClient,
localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision | null>;
}
@@ -74,5 +76,6 @@ export interface TerminalStrategy extends RoutingStrategy {
context: RoutingContext,
config: Config,
baseLlmClient: BaseLlmClient,
localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision>;
}
packages/core/src/routing/strategies/classifierStrategy.test.ts
+36 -4
View File
@@ -9,6 +9,7 @@ import { ClassifierStrategy } from './classifierStrategy.js';
import type { RoutingContext } from '../routingStrategy.js';
import type { Config } from '../../config/config.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import {
isFunctionCall,
isFunctionResponse,
@@ -34,6 +35,7 @@ describe('ClassifierStrategy', () => {
let mockContext: RoutingContext;
let mockConfig: Config;
let mockBaseLlmClient: BaseLlmClient;
let mockLocalLiteRtLmClient: LocalLiteRtLmClient;
let mockResolvedConfig: ResolvedModelConfig;
beforeEach(() => {
@@ -64,6 +66,7 @@ describe('ClassifierStrategy', () => {
mockBaseLlmClient = {
generateJson: vi.fn(),
} as unknown as BaseLlmClient;
mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
vi.spyOn(promptIdContext, 'getStore').mockReturnValue('test-prompt-id');
});
@@ -76,6 +79,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -94,6 +98,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
@@ -109,7 +114,12 @@ describe('ClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockBaseLlmClient.generateJson).toHaveBeenCalledWith(
expect.objectContaining({
@@ -132,6 +142,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockBaseLlmClient.generateJson).toHaveBeenCalledOnce();
@@ -159,6 +170,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockBaseLlmClient.generateJson).toHaveBeenCalledOnce();
@@ -183,6 +195,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -206,6 +219,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -233,7 +247,12 @@ describe('ClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -269,7 +288,12 @@ describe('ClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -305,7 +329,12 @@ describe('ClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -340,6 +369,7 @@ describe('ClassifierStrategy', () => {
contextWithRequestedModel,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
@@ -363,6 +393,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision?.model).toBe(PREVIEW_GEMINI_3_1_MODEL);
@@ -386,6 +417,7 @@ describe('ClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision?.model).toBe(PREVIEW_GEMINI_3_1_CUSTOM_TOOLS_MODEL);
packages/core/src/routing/strategies/classifierStrategy.ts
+2
View File
@@ -20,6 +20,7 @@ import {
isFunctionResponse,
} from '../../utils/messageInspectors.js';
import { debugLogger } from '../../utils/debugLogger.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import { LlmRole } from '../../telemetry/types.js';
import { AuthType } from '../../core/contentGenerator.js';
@@ -132,6 +133,7 @@ export class ClassifierStrategy implements RoutingStrategy {
context: RoutingContext,
config: Config,
baseLlmClient: BaseLlmClient,
_localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision | null> {
const startTime = Date.now();
try {
packages/core/src/routing/strategies/compositeStrategy.test.ts
+16 -1
View File
@@ -16,6 +16,7 @@ import type { Config } from '../../config/config.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import { debugLogger } from '../../utils/debugLogger.js';
import { coreEvents } from '../../utils/events.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
vi.mock('../../utils/debugLogger.js', () => ({
debugLogger: {
@@ -27,6 +28,7 @@ describe('CompositeStrategy', () => {
let mockContext: RoutingContext;
let mockConfig: Config;
let mockBaseLlmClient: BaseLlmClient;
let mockLocalLiteRtLmClient: LocalLiteRtLmClient;
let mockStrategy1: RoutingStrategy;
let mockStrategy2: RoutingStrategy;
let mockTerminalStrategy: TerminalStrategy;
@@ -38,6 +40,7 @@ describe('CompositeStrategy', () => {
mockContext = {} as RoutingContext;
mockConfig = {} as Config;
mockBaseLlmClient = {} as BaseLlmClient;
mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
emitFeedbackSpy = vi.spyOn(coreEvents, 'emitFeedback');
@@ -84,17 +87,20 @@ describe('CompositeStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockStrategy1.route).toHaveBeenCalledWith(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockStrategy2.route).toHaveBeenCalledWith(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockTerminalStrategy.route).not.toHaveBeenCalled();
@@ -112,6 +118,7 @@ describe('CompositeStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockStrategy1.route).toHaveBeenCalledTimes(1);
@@ -136,6 +143,7 @@ describe('CompositeStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(debugLogger.warn).toHaveBeenCalledWith(
@@ -152,7 +160,12 @@ describe('CompositeStrategy', () => {
const composite = new CompositeStrategy([mockTerminalStrategy]);
await expect(
composite.route(mockContext, mockConfig, mockBaseLlmClient),
composite.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
),
).rejects.toThrow(terminalError);
expect(emitFeedbackSpy).toHaveBeenCalledWith(
@@ -182,6 +195,7 @@ describe('CompositeStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(result.model).toBe('some-model');
@@ -212,6 +226,7 @@ describe('CompositeStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(result.metadata.latencyMs).toBeGreaterThanOrEqual(0);
packages/core/src/routing/strategies/compositeStrategy.ts
+9 -1
View File
@@ -14,6 +14,7 @@ import type {
RoutingStrategy,
TerminalStrategy,
} from '../routingStrategy.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
/**
* A strategy that attempts a list of child strategies in order (Chain of Responsibility).
@@ -40,6 +41,7 @@ export class CompositeStrategy implements TerminalStrategy {
context: RoutingContext,
config: Config,
baseLlmClient: BaseLlmClient,
localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision> {
const startTime = performance.now();
@@ -57,7 +59,12 @@ export class CompositeStrategy implements TerminalStrategy {
// Try non-terminal strategies, allowing them to fail gracefully.
for (const strategy of nonTerminalStrategies) {
try {
const decision = await strategy.route(context, config, baseLlmClient);
const decision = await strategy.route(
context,
config,
baseLlmClient,
localLiteRtLmClient,
);
if (decision) {
return this.finalizeDecision(decision, startTime);
}
@@ -75,6 +82,7 @@ export class CompositeStrategy implements TerminalStrategy {
context,
config,
baseLlmClient,
localLiteRtLmClient,
);
return this.finalizeDecision(decision, startTime);
packages/core/src/routing/strategies/defaultStrategy.test.ts
+29 -4
View File
@@ -8,6 +8,7 @@ import { describe, it, expect, vi } from 'vitest';
import { DefaultStrategy } from './defaultStrategy.js';
import type { RoutingContext } from '../routingStrategy.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import {
DEFAULT_GEMINI_MODEL,
PREVIEW_GEMINI_MODEL,
@@ -26,8 +27,14 @@ describe('DefaultStrategy', () => {
getModel: vi.fn().mockReturnValue(DEFAULT_GEMINI_MODEL_AUTO),
} as unknown as Config;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
model: DEFAULT_GEMINI_MODEL,
@@ -46,8 +53,14 @@ describe('DefaultStrategy', () => {
getModel: vi.fn().mockReturnValue(PREVIEW_GEMINI_MODEL_AUTO),
} as unknown as Config;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
model: PREVIEW_GEMINI_MODEL,
@@ -66,8 +79,14 @@ describe('DefaultStrategy', () => {
getModel: vi.fn().mockReturnValue(GEMINI_MODEL_ALIAS_AUTO),
} as unknown as Config;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
model: PREVIEW_GEMINI_MODEL,
@@ -87,8 +106,14 @@ describe('DefaultStrategy', () => {
getModel: vi.fn().mockReturnValue(PREVIEW_GEMINI_FLASH_MODEL),
} as unknown as Config;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
model: PREVIEW_GEMINI_FLASH_MODEL,
packages/core/src/routing/strategies/defaultStrategy.ts
+2
View File
@@ -12,6 +12,7 @@ import type {
TerminalStrategy,
} from '../routingStrategy.js';
import { resolveModel } from '../../config/models.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
export class DefaultStrategy implements TerminalStrategy {
readonly name = 'default';
@@ -20,6 +21,7 @@ export class DefaultStrategy implements TerminalStrategy {
_context: RoutingContext,
config: Config,
_baseLlmClient: BaseLlmClient,
_localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision> {
const defaultModel = resolveModel(
config.getModel(),
packages/core/src/routing/strategies/fallbackStrategy.test.ts
+27 -4
View File
@@ -10,6 +10,7 @@ import type { RoutingContext } from '../routingStrategy.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import type { Config } from '../../config/config.js';
import type { ModelAvailabilityService } from '../../availability/modelAvailabilityService.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import {
DEFAULT_GEMINI_MODEL,
DEFAULT_GEMINI_FLASH_MODEL,
@@ -32,6 +33,7 @@ describe('FallbackStrategy', () => {
const strategy = new FallbackStrategy();
const mockContext = {} as RoutingContext;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
let mockService: ModelAvailabilityService;
let mockConfig: Config;
@@ -51,7 +53,12 @@ describe('FallbackStrategy', () => {
// Mock snapshot to return available
vi.mocked(mockService.snapshot).mockReturnValue({ available: true });
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
// Should check availability of the resolved model (DEFAULT_GEMINI_MODEL)
expect(mockService.snapshot).toHaveBeenCalledWith(DEFAULT_GEMINI_MODEL);
@@ -69,7 +76,12 @@ describe('FallbackStrategy', () => {
skipped: [],
});
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
});
@@ -86,7 +98,12 @@ describe('FallbackStrategy', () => {
skipped: [{ model: DEFAULT_GEMINI_MODEL, reason: 'quota' }],
});
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
expect(decision?.model).toBe(DEFAULT_GEMINI_FLASH_MODEL);
@@ -101,7 +118,12 @@ describe('FallbackStrategy', () => {
vi.mocked(mockService.snapshot).mockReturnValue({ available: true });
vi.mocked(mockConfig.getModel).mockReturnValue(DEFAULT_GEMINI_MODEL_AUTO);
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
// Important: check that it queried snapshot with the RESOLVED model, not 'auto'
@@ -122,6 +144,7 @@ describe('FallbackStrategy', () => {
contextWithRequestedModel,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
packages/core/src/routing/strategies/fallbackStrategy.ts
+2
View File
@@ -13,6 +13,7 @@ import type {
RoutingDecision,
RoutingStrategy,
} from '../routingStrategy.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
export class FallbackStrategy implements RoutingStrategy {
readonly name = 'fallback';
@@ -21,6 +22,7 @@ export class FallbackStrategy implements RoutingStrategy {
context: RoutingContext,
config: Config,
_baseLlmClient: BaseLlmClient,
_localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision | null> {
const requestedModel = context.requestedModel ?? config.getModel();
const resolvedModel = resolveModel(
packages/core/src/routing/strategies/gemmaClassifierStrategy.test.ts
+324
View File
@@ -0,0 +1,324 @@
/**
* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import type { Mock } from 'vitest';
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { GemmaClassifierStrategy } from './gemmaClassifierStrategy.js';
import type { RoutingContext } from '../routingStrategy.js';
import type { Config } from '../../config/config.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import {
DEFAULT_GEMINI_FLASH_MODEL,
DEFAULT_GEMINI_MODEL,
} from '../../config/models.js';
import type { Content } from '@google/genai';
import { debugLogger } from '../../utils/debugLogger.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
vi.mock('../../core/localLiteRtLmClient.js');
describe('GemmaClassifierStrategy', () => {
let strategy: GemmaClassifierStrategy;
let mockContext: RoutingContext;
let mockConfig: Config;
let mockBaseLlmClient: BaseLlmClient;
let mockLocalLiteRtLmClient: LocalLiteRtLmClient;
let mockGenerateJson: Mock;
beforeEach(() => {
vi.clearAllMocks();
mockGenerateJson = vi.fn();
mockConfig = {
getGemmaModelRouterSettings: vi.fn().mockReturnValue({
enabled: true,
classifier: { model: 'gemma3-1b-gpu-custom' },
}),
getModel: () => DEFAULT_GEMINI_MODEL,
getPreviewFeatures: () => false,
} as unknown as Config;
strategy = new GemmaClassifierStrategy();
mockContext = {
history: [],
request: 'simple task',
signal: new AbortController().signal,
};
mockBaseLlmClient = {} as BaseLlmClient;
mockLocalLiteRtLmClient = {
generateJson: mockGenerateJson,
} as unknown as LocalLiteRtLmClient;
});
it('should return null if gemma model router is disabled', async () => {
vi.mocked(mockConfig.getGemmaModelRouterSettings).mockReturnValue({
enabled: false,
});
const decision = await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
});
it('should throw an error if the model is not gemma3-1b-gpu-custom', async () => {
vi.mocked(mockConfig.getGemmaModelRouterSettings).mockReturnValue({
enabled: true,
classifier: { model: 'other-model' },
});
await expect(
strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
),
).rejects.toThrow('Only gemma3-1b-gpu-custom has been tested');
});
it('should call generateJson with the correct parameters', async () => {
const mockApiResponse = {
reasoning: 'Simple task',
model_choice: 'flash',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockGenerateJson).toHaveBeenCalledWith(
expect.any(Array),
expect.any(String),
expect.any(String),
expect.any(AbortSignal),
);
});
it('should route to FLASH model for a simple task', async () => {
const mockApiResponse = {
reasoning: 'This is a simple task.',
model_choice: 'flash',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
const decision = await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockGenerateJson).toHaveBeenCalledOnce();
expect(decision).toEqual({
model: DEFAULT_GEMINI_FLASH_MODEL,
metadata: {
source: 'GemmaClassifier',
latencyMs: expect.any(Number),
reasoning: mockApiResponse.reasoning,
},
});
});
it('should route to PRO model for a complex task', async () => {
const mockApiResponse = {
reasoning: 'This is a complex task.',
model_choice: 'pro',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
mockContext.request = 'how do I build a spaceship?';
const decision = await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(mockGenerateJson).toHaveBeenCalledOnce();
expect(decision).toEqual({
model: DEFAULT_GEMINI_MODEL,
metadata: {
source: 'GemmaClassifier',
latencyMs: expect.any(Number),
reasoning: mockApiResponse.reasoning,
},
});
});
it('should return null if the classifier API call fails', async () => {
const consoleWarnSpy = vi
.spyOn(debugLogger, 'warn')
.mockImplementation(() => {});
const testError = new Error('API Failure');
mockGenerateJson.mockRejectedValue(testError);
const decision = await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
expect(consoleWarnSpy).toHaveBeenCalled();
consoleWarnSpy.mockRestore();
});
it('should return null if the classifier returns a malformed JSON object', async () => {
const consoleWarnSpy = vi
.spyOn(debugLogger, 'warn')
.mockImplementation(() => {});
const malformedApiResponse = {
reasoning: 'This is a simple task.',
// model_choice is missing, which will cause a Zod parsing error.
};
mockGenerateJson.mockResolvedValue(malformedApiResponse);
const decision = await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
expect(consoleWarnSpy).toHaveBeenCalled();
consoleWarnSpy.mockRestore();
});
it('should filter out tool-related history before sending to classifier', async () => {
mockContext.history = [
{ role: 'user', parts: [{ text: 'call a tool' }] },
{
role: 'model',
parts: [{ functionCall: { name: 'test_tool', args: {} } }],
},
{
role: 'user',
parts: [
{ functionResponse: { name: 'test_tool', response: { ok: true } } },
],
},
{ role: 'user', parts: [{ text: 'another user turn' }] },
];
const mockApiResponse = {
reasoning: 'Simple.',
model_choice: 'flash',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
// Define a type for the arguments passed to the mock `generateJson`
type GenerateJsonCall = [Content[], string, string | undefined];
const calls = mockGenerateJson.mock.calls as GenerateJsonCall[];
const contents = calls[0][0];
const lastTurn = contents.at(-1);
expect(lastTurn).toBeDefined();
if (!lastTurn?.parts) {
// Fail test if parts is not defined.
expect(lastTurn?.parts).toBeDefined();
return;
}
const expectedLastTurn = `You are provided with a **Chat History** and the user's **Current Request** below.
#### Chat History:
call a tool
another user turn
#### Current Request:
"simple task"
`;
expect(lastTurn.parts.at(0)?.text).toEqual(expectedLastTurn);
});
it('should respect HISTORY_SEARCH_WINDOW and HISTORY_TURNS_FOR_CONTEXT', async () => {
const longHistory: Content[] = [];
for (let i = 0; i < 30; i++) {
longHistory.push({ role: 'user', parts: [{ text: `Message ${i}` }] });
// Add noise that should be filtered
if (i % 2 === 0) {
longHistory.push({
role: 'model',
parts: [{ functionCall: { name: 'noise', args: {} } }],
});
}
}
mockContext.history = longHistory;
const mockApiResponse = {
reasoning: 'Simple.',
model_choice: 'flash',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = mockGenerateJson.mock.calls[0][0];
// There should be 1 item which is the flattened history.
expect(generateJsonCall).toHaveLength(1);
});
it('should filter out non-text parts from history', async () => {
mockContext.history = [
{ role: 'user', parts: [{ text: 'first message' }] },
// This part has no `text` property and should be filtered out.
{ role: 'user', parts: [{}] } as Content,
{ role: 'user', parts: [{ text: 'second message' }] },
];
const mockApiResponse = {
reasoning: 'Simple.',
model_choice: 'flash',
};
mockGenerateJson.mockResolvedValue(mockApiResponse);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
type GenerateJsonCall = [Content[], string, string | undefined];
const calls = mockGenerateJson.mock.calls as GenerateJsonCall[];
const contents = calls[0][0];
const lastTurn = contents.at(-1);
expect(lastTurn).toBeDefined();
const expectedLastTurn = `You are provided with a **Chat History** and the user's **Current Request** below.
#### Chat History:
first message
second message
#### Current Request:
"simple task"
`;
expect(lastTurn!.parts!.at(0)!.text).toEqual(expectedLastTurn);
});
});
packages/core/src/routing/strategies/gemmaClassifierStrategy.ts
+232
View File
@@ -0,0 +1,232 @@
/**
* @license
* Copyright 2026 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { z } from 'zod';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import type {
RoutingContext,
RoutingDecision,
RoutingStrategy,
} from '../routingStrategy.js';
import { resolveClassifierModel } from '../../config/models.js';
import { createUserContent, type Content, type Part } from '@google/genai';
import type { Config } from '../../config/config.js';
import {
isFunctionCall,
isFunctionResponse,
} from '../../utils/messageInspectors.js';
import { debugLogger } from '../../utils/debugLogger.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
// The number of recent history turns to provide to the router for context.
const HISTORY_TURNS_FOR_CONTEXT = 4;
const HISTORY_SEARCH_WINDOW = 20;
const FLASH_MODEL = 'flash';
const PRO_MODEL = 'pro';
const COMPLEXITY_RUBRIC = `### Complexity Rubric
A task is COMPLEX (Choose \`${PRO_MODEL}\`) if it meets ONE OR MORE of the following criteria:
1. **High Operational Complexity (Est. 4+ Steps/Tool Calls):** Requires dependent actions, significant planning, or multiple coordinated changes.
2. **Strategic Planning & Conceptual Design:** Asking "how" or "why." Requires advice, architecture, or high-level strategy.
3. **High Ambiguity or Large Scope (Extensive Investigation):** Broadly defined requests requiring extensive investigation.
4. **Deep Debugging & Root Cause Analysis:** Diagnosing unknown or complex problems from symptoms.
A task is SIMPLE (Choose \`${FLASH_MODEL}\`) if it is highly specific, bounded, and has Low Operational Complexity (Est. 1-3 tool calls). Operational simplicity overrides strategic phrasing.`;
const OUTPUT_FORMAT = `### Output Format
Respond *only* in JSON format like this:
{
"reasoning": Your reasoning...
"model_choice": Either ${FLASH_MODEL} or ${PRO_MODEL}
}
And you must follow the following JSON schema:
{
"type": "object",
"properties": {
"reasoning": {
"type": "string",
"description": "A brief summary of the user objective, followed by a step-by-step explanation for the model choice, referencing the rubric."
},
"model_choice": {
"type": "string",
"enum": ["${FLASH_MODEL}", "${PRO_MODEL}"]
}
},
"required": ["reasoning", "model_choice"]
}
You must ensure that your reasoning is no more than 2 sentences long and directly references the rubric criteria.
When making your decision, the user's request should be weighted much more heavily than the surrounding context when making your determination.`;
const LITERT_GEMMA_CLASSIFIER_SYSTEM_PROMPT = `### Role
You are the **Lead Orchestrator** for an AI system. You do not talk to users. Your sole responsibility is to analyze the **Chat History** and delegate the **Current Request** to the most appropriate **Model** based on the request's complexity.
### Models
Choose between \`${FLASH_MODEL}\` (SIMPLE) or \`${PRO_MODEL}\` (COMPLEX).
1. \`${FLASH_MODEL}\`: A fast, efficient model for simple, well-defined tasks.
2. \`${PRO_MODEL}\`: A powerful, advanced model for complex, open-ended, or multi-step tasks.
${COMPLEXITY_RUBRIC}
${OUTPUT_FORMAT}
### Examples
**Example 1 (Strategic Planning):**
*User Prompt:* "How should I architect the data pipeline for this new analytics service?"
*Your JSON Output:*
{
"reasoning": "The user is asking for high-level architectural design and strategy. This falls under 'Strategic Planning & Conceptual Design'.",
"model_choice": "${PRO_MODEL}"
}
**Example 2 (Simple Tool Use):**
*User Prompt:* "list the files in the current directory"
*Your JSON Output:*
{
"reasoning": "This is a direct command requiring a single tool call (ls). It has Low Operational Complexity (1 step).",
"model_choice": "${FLASH_MODEL}"
}
**Example 3 (High Operational Complexity):**
*User Prompt:* "I need to add a new 'email' field to the User schema in 'src/models/user.ts', migrate the database, and update the registration endpoint."
*Your JSON Output:*
{
"reasoning": "This request involves multiple coordinated steps across different files and systems. This meets the criteria for High Operational Complexity (4+ steps).",
"model_choice": "${PRO_MODEL}"
}
**Example 4 (Simple Read):**
*User Prompt:* "Read the contents of 'package.json'."
*Your JSON Output:*
{
"reasoning": "This is a direct command requiring a single read. It has Low Operational Complexity (1 step).",
"model_choice": "${FLASH_MODEL}"
}
**Example 5 (Deep Debugging):**
*User Prompt:* "I'm getting an error 'Cannot read property 'map' of undefined' when I click the save button. Can you fix it?"
*Your JSON Output:*
{
"reasoning": "The user is reporting an error symptom without a known cause. This requires investigation and falls under 'Deep Debugging'.",
"model_choice": "${PRO_MODEL}"
}
**Example 6 (Simple Edit despite Phrasing):**
*User Prompt:* "What is the best way to rename the variable 'data' to 'userData' in 'src/utils.js'?"
*Your JSON Output:*
{
"reasoning": "Although the user uses strategic language ('best way'), the underlying task is a localized edit. The operational complexity is low (1-2 steps).",
"model_choice": "${FLASH_MODEL}"
}
`;
const LITERT_GEMMA_CLASSIFIER_REMINDER = `### Reminder
You are a Task Routing AI. Your sole task is to analyze the preceding **Chat History** and **Current Request** and classify its complexity.
${COMPLEXITY_RUBRIC}
${OUTPUT_FORMAT}
`;
const ClassifierResponseSchema = z.object({
reasoning: z.string(),
model_choice: z.enum([FLASH_MODEL, PRO_MODEL]),
});
export class GemmaClassifierStrategy implements RoutingStrategy {
readonly name = 'gemma-classifier';
private flattenChatHistory(turns: Content[]): Content[] {
const formattedHistory = turns
.slice(0, -1)
.map((turn) =>
turn.parts
? turn.parts
.map((part) => part.text)
.filter(Boolean)
.join('\n')
: '',
)
.filter(Boolean)
.join('\n\n');
const lastTurn = turns.at(-1);
const userRequest =
lastTurn?.parts
?.map((part: Part) => part.text)
.filter(Boolean)
.join('\n\n') ?? '';
const finalPrompt = `You are provided with a **Chat History** and the user's **Current Request** below.
#### Chat History:
${formattedHistory}
#### Current Request:
"${userRequest}"
`;
return [createUserContent(finalPrompt)];
}
async route(
context: RoutingContext,
config: Config,
_baseLlmClient: BaseLlmClient,
client: LocalLiteRtLmClient,
): Promise<RoutingDecision | null> {
const startTime = Date.now();
const gemmaRouterSettings = config.getGemmaModelRouterSettings();
if (!gemmaRouterSettings?.enabled) {
return null;
}
// Only the gemma3-1b-gpu-custom model has been tested and verified.
if (gemmaRouterSettings.classifier?.model !== 'gemma3-1b-gpu-custom') {
throw new Error('Only gemma3-1b-gpu-custom has been tested');
}
try {
const historySlice = context.history.slice(-HISTORY_SEARCH_WINDOW);
// Filter out tool-related turns.
// TODO - Consider using function req/res if they help accuracy.
const cleanHistory = historySlice.filter(
(content) => !isFunctionCall(content) && !isFunctionResponse(content),
);
// Take the last N turns from the *cleaned* history.
const finalHistory = cleanHistory.slice(-HISTORY_TURNS_FOR_CONTEXT);
const history = [...finalHistory, createUserContent(context.request)];
const singleMessageHistory = this.flattenChatHistory(history);
const jsonResponse = await client.generateJson(
singleMessageHistory,
LITERT_GEMMA_CLASSIFIER_SYSTEM_PROMPT,
LITERT_GEMMA_CLASSIFIER_REMINDER,
context.signal,
);
const routerResponse = ClassifierResponseSchema.parse(jsonResponse);
const reasoning = routerResponse.reasoning;
const latencyMs = Date.now() - startTime;
const selectedModel = resolveClassifierModel(
context.requestedModel ?? config.getModel(),
routerResponse.model_choice,
);
return {
model: selectedModel,
metadata: {
source: 'GemmaClassifier',
latencyMs,
reasoning,
},
};
} catch (error) {
// If the classifier fails for any reason (API error, parsing error, etc.),
// we log it and return null to allow the composite strategy to proceed.
debugLogger.warn(`[Routing] GemmaClassifierStrategy failed:`, error);
return null;
}
}
}
packages/core/src/routing/strategies/numericalClassifierStrategy.test.ts
+45 -4
View File
@@ -22,6 +22,7 @@ import { promptIdContext } from '../../utils/promptIdContext.js';
import type { Content } from '@google/genai';
import type { ResolvedModelConfig } from '../../services/modelConfigService.js';
import { debugLogger } from '../../utils/debugLogger.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import { AuthType } from '../../core/contentGenerator.js';
vi.mock('../../core/baseLlmClient.js');
@@ -31,6 +32,7 @@ describe('NumericalClassifierStrategy', () => {
let mockContext: RoutingContext;
let mockConfig: Config;
let mockBaseLlmClient: BaseLlmClient;
let mockLocalLiteRtLmClient: LocalLiteRtLmClient;
let mockResolvedConfig: ResolvedModelConfig;
beforeEach(() => {
@@ -63,6 +65,7 @@ describe('NumericalClassifierStrategy', () => {
mockBaseLlmClient = {
generateJson: vi.fn(),
} as unknown as BaseLlmClient;
mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
vi.spyOn(promptIdContext, 'getStore').mockReturnValue('test-prompt-id');
});
@@ -78,6 +81,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -91,6 +95,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -104,6 +109,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -119,7 +125,12 @@ describe('NumericalClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -151,6 +162,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -177,6 +189,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -203,6 +216,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -229,6 +243,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -257,6 +272,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -283,6 +299,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -309,6 +326,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -337,6 +355,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -364,6 +383,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -391,6 +411,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toEqual({
@@ -415,6 +436,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -437,6 +459,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
@@ -463,7 +486,12 @@ describe('NumericalClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -495,7 +523,12 @@ describe('NumericalClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -528,7 +561,12 @@ describe('NumericalClassifierStrategy', () => {
mockApiResponse,
);
await strategy.route(mockContext, mockConfig, mockBaseLlmClient);
await strategy.route(
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
const generateJsonCall = vi.mocked(mockBaseLlmClient.generateJson).mock
.calls[0][0];
@@ -558,6 +596,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision?.model).toBe(PREVIEW_GEMINI_3_1_MODEL);
@@ -579,6 +618,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision?.model).toBe(PREVIEW_GEMINI_3_1_CUSTOM_TOOLS_MODEL);
@@ -601,6 +641,7 @@ describe('NumericalClassifierStrategy', () => {
mockContext,
mockConfig,
mockBaseLlmClient,
mockLocalLiteRtLmClient,
);
expect(decision?.model).toBe(PREVIEW_GEMINI_3_1_MODEL);
packages/core/src/routing/strategies/numericalClassifierStrategy.ts
+2
View File
@@ -16,6 +16,7 @@ import { resolveClassifierModel, isGemini3Model } from '../../config/models.js';
import { createUserContent, Type } from '@google/genai';
import type { Config } from '../../config/config.js';
import { debugLogger } from '../../utils/debugLogger.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
import { LlmRole } from '../../telemetry/types.js';
import { AuthType } from '../../core/contentGenerator.js';
@@ -133,6 +134,7 @@ export class NumericalClassifierStrategy implements RoutingStrategy {
context: RoutingContext,
config: Config,
baseLlmClient: BaseLlmClient,
_localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision | null> {
const startTime = Date.now();
try {
packages/core/src/routing/strategies/overrideStrategy.test.ts
+21 -3
View File
@@ -10,18 +10,25 @@ import type { RoutingContext } from '../routingStrategy.js';
import type { BaseLlmClient } from '../../core/baseLlmClient.js';
import type { Config } from '../../config/config.js';
import { DEFAULT_GEMINI_MODEL_AUTO } from '../../config/models.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
describe('OverrideStrategy', () => {
const strategy = new OverrideStrategy();
const mockContext = {} as RoutingContext;
const mockClient = {} as BaseLlmClient;
const mockLocalLiteRtLmClient = {} as LocalLiteRtLmClient;
it('should return null when the override model is auto', async () => {
const mockConfig = {
getModel: () => DEFAULT_GEMINI_MODEL_AUTO,
} as Config;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).toBeNull();
});
@@ -31,7 +38,12 @@ describe('OverrideStrategy', () => {
getModel: () => overrideModel,
} as Config;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
expect(decision?.model).toBe(overrideModel);
@@ -48,7 +60,12 @@ describe('OverrideStrategy', () => {
getModel: () => overrideModel,
} as Config;
const decision = await strategy.route(mockContext, mockConfig, mockClient);
const decision = await strategy.route(
mockContext,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
expect(decision?.model).toBe(overrideModel);
@@ -68,6 +85,7 @@ describe('OverrideStrategy', () => {
contextWithRequestedModel,
mockConfig,
mockClient,
mockLocalLiteRtLmClient,
);
expect(decision).not.toBeNull();
packages/core/src/routing/strategies/overrideStrategy.ts
+2
View File
@@ -12,6 +12,7 @@ import type {
RoutingDecision,
RoutingStrategy,
} from '../routingStrategy.js';
import type { LocalLiteRtLmClient } from '../../core/localLiteRtLmClient.js';
/**
* Handles cases where the user explicitly specifies a model (override).
@@ -23,6 +24,7 @@ export class OverrideStrategy implements RoutingStrategy {
context: RoutingContext,
config: Config,
_baseLlmClient: BaseLlmClient,
_localLiteRtLmClient: LocalLiteRtLmClient,
): Promise<RoutingDecision | null> {
const overrideModel = context.requestedModel ?? config.getModel();
schemas/settings.schema.json
+41
View File
@@ -1694,6 +1694,47 @@
"markdownDescription": "Enable web fetch behavior that bypasses LLM summarization.\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `false`",
"default": false,
"type": "boolean"
},
"gemmaModelRouter": {
"title": "Gemma Model Router",
"description": "Enable Gemma model router (experimental).",
"markdownDescription": "Enable Gemma model router (experimental).\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `{}`",
"default": {},
"type": "object",
"properties": {
"enabled": {
"title": "Enable Gemma Model Router",
"description": "Enable the Gemma Model Router. Requires a local endpoint serving Gemma via the Gemini API using LiteRT-LM shim.",
"markdownDescription": "Enable the Gemma Model Router. Requires a local endpoint serving Gemma via the Gemini API using LiteRT-LM shim.\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `false`",
"default": false,
"type": "boolean"
},
"classifier": {
"title": "Classifier",
"description": "Classifier configuration.",
"markdownDescription": "Classifier configuration.\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `{}`",
"default": {},
"type": "object",
"properties": {
"host": {
"title": "Host",
"description": "The host of the classifier.",
"markdownDescription": "The host of the classifier.\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `http://localhost:9379`",
"default": "http://localhost:9379",
"type": "string"
},
"model": {
"title": "Model",
"description": "The model to use for the classifier. Only tested on `gemma3-1b-gpu-custom`.",
"markdownDescription": "The model to use for the classifier. Only tested on `gemma3-1b-gpu-custom`.\n\n- Category: `Experimental`\n- Requires restart: `yes`\n- Default: `gemma3-1b-gpu-custom`",
"default": "gemma3-1b-gpu-custom",
"type": "string"
}
},
"additionalProperties": false
}
},
"additionalProperties": false
}
},
"additionalProperties": false