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major(llm): Support Embedding Providers

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This commit is contained in:
Aditya Gupta
2026-07-11 14:31:18 +05:30
parent a5fa43e2e6
commit 597d4f1711
10 changed files with 398 additions and 89 deletions
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17
packages/llm/src/llm.ts
View File

@@ -30,46 +30,55 @@ export interface LLMCallRecord {
export interface ILLMProvider {
providerName: string;
// We use Zod to ensure the generic T matches the schema
generateStructuredResponse<T extends z.ZodTypeAny>(
request: LLMRequest<T>,
): Promise<LLMResponse<z.infer<T>>>;
lastCalls?: LLMCallRecord[];
}
export interface LLMProviderInstance {
export interface IEmbeddingProvider {
providerName: string;
embed(text: string): Promise<number[]>;
}
export interface ModelProviderInstance {
id: string;
name: string;
providerName: string;
apiKey: string;
isActive: boolean;
modelName?: string;
type: "generative" | "embedding";
}
export interface LLMProviderMeta {
export interface ModelProviderMeta {
id: string;
displayName: string;
description: string;
defaultModel: string;
defaultEmbeddingModel: string;
}
export const AVAILABLE_PROVIDERS: LLMProviderMeta[] = [
export const AVAILABLE_PROVIDERS: ModelProviderMeta[] = [
{
id: "google-genai",
displayName: "Google Gemini",
description: "Official Gemini integration using Google Gen AI SDK",
defaultModel: "gemini-2.5-flash",
defaultEmbeddingModel: "gemini-embedding-001",
},
{
id: "openrouter",
displayName: "OpenRouter",
description: "Multi-model router supporting Anthropic, OpenAI, DeepSeek, and local models",
defaultModel: "google/gemini-2.5-flash",
defaultEmbeddingModel: "openai/text-embedding-3-small",
},
{
id: "mock",
displayName: "Mock LLM Provider",
description: "Stateless mock provider for testing and offline development",
defaultModel: "mock",
defaultEmbeddingModel: "mock-embeddings",
},
];

143
packages/llm/src/provider-manager.ts
View File

@@ -1,7 +1,7 @@
import Database from "better-sqlite3";
import path from "path";
import fs from "fs";
import type { LLMProviderInstance } from "./llm.js";
import type { ModelProviderInstance } from "./llm.js";
function getWorkspaceRoot() {
let current = process.cwd();
@@ -35,7 +35,8 @@ function getSettingsDb() {
providerName TEXT NOT NULL,
apiKey TEXT NOT NULL,
isActive INTEGER NOT NULL DEFAULT 0,
modelName TEXT
modelName TEXT,
type TEXT NOT NULL DEFAULT 'generative'
)
`).run();
@@ -44,12 +45,18 @@ function getSettingsDb() {
} catch {
// ignore
}
try {
db.prepare(`ALTER TABLE provider_instances ADD COLUMN type TEXT NOT NULL DEFAULT 'generative'`).run();
} catch {
// ignore
}
return db;
}
export class ProviderManager {
static list(): LLMProviderInstance[] {
static list(): ModelProviderInstance[] {
const db = getSettingsDb();
try {
const rows = db.prepare(`SELECT * FROM provider_instances`).all() as {
@@ -59,6 +66,7 @@ export class ProviderManager {
apiKey: string;
isActive: number;
modelName?: string;
type: string;
}[];
return rows.map((r) => ({
id: r.id,
@@ -67,25 +75,34 @@ export class ProviderManager {
apiKey: r.apiKey,
isActive: r.isActive === 1,
modelName: r.modelName || undefined,
type: (r.type as "generative" | "embedding") || "generative",
}));
} finally {
db.close();
}
}
static create(name: string, providerName: string, apiKey: string, modelName?: string): LLMProviderInstance {
static create(
name: string,
providerName: string,
apiKey: string,
modelName?: string,
type: "generative" | "embedding" = "generative"
): ModelProviderInstance {
const db = getSettingsDb();
try {
const id = "provider-" + Date.now();
const activeCount = db.prepare(`SELECT COUNT(*) as count FROM provider_instances WHERE isActive = 1`).get() as { count: number };
const activeCount = db
.prepare(`SELECT COUNT(*) as count FROM provider_instances WHERE isActive = 1 AND type = ?`)
.get(type) as { count: number };
const isActive = activeCount.count === 0 ? 1 : 0;
db.prepare(`
INSERT INTO provider_instances (id, name, providerName, apiKey, isActive, modelName)
VALUES (?, ?, ?, ?, ?, ?)
`).run(id, name, providerName, apiKey, isActive, modelName || null);
INSERT INTO provider_instances (id, name, providerName, apiKey, isActive, modelName, type)
VALUES (?, ?, ?, ?, ?, ?, ?)
`).run(id, name, providerName, apiKey, isActive, modelName || null, type);
return { id, name, providerName, apiKey, isActive: isActive === 1, modelName };
return { id, name, providerName, apiKey, isActive: isActive === 1, modelName, type };
} finally {
db.close();
}
@@ -94,11 +111,13 @@ export class ProviderManager {
static delete(id: string): void {
const db = getSettingsDb();
try {
const provider = db.prepare(`SELECT isActive FROM provider_instances WHERE id = ?`).get(id) as { isActive: number } | undefined;
const provider = db.prepare(`SELECT isActive, type FROM provider_instances WHERE id = ?`).get(id) as { isActive: number; type: string } | undefined;
db.prepare(`DELETE FROM provider_instances WHERE id = ?`).run(id);
if (provider && provider.isActive === 1) {
const next = db.prepare(`SELECT id FROM provider_instances LIMIT 1`).get() as { id: string } | undefined;
const next = db
.prepare(`SELECT id FROM provider_instances WHERE type = ? LIMIT 1`)
.get(provider.type) as { id: string } | undefined;
if (next) {
db.prepare(`UPDATE provider_instances SET isActive = 1 WHERE id = ?`).run(next.id);
}
@@ -111,60 +130,85 @@ export class ProviderManager {
static setActive(id: string): void {
const db = getSettingsDb();
try {
db.prepare(`UPDATE provider_instances SET isActive = 0`).run();
db.prepare(`UPDATE provider_instances SET isActive = 1 WHERE id = ?`).run(id);
} finally {
db.close();
}
}
static update(id: string, name: string, providerName: string, apiKey?: string, modelName?: string): void {
const db = getSettingsDb();
try {
if (apiKey && apiKey.trim()) {
db.prepare(`
UPDATE provider_instances
SET name = ?, providerName = ?, apiKey = ?, modelName = ?
WHERE id = ?
`).run(name, providerName, apiKey, modelName || null, id);
} else {
db.prepare(`
UPDATE provider_instances
SET name = ?, providerName = ?, modelName = ?
WHERE id = ?
`).run(name, providerName, modelName || null, id);
const target = db.prepare(`SELECT type FROM provider_instances WHERE id = ?`).get(id) as { type: string } | undefined;
if (target) {
db.prepare(`UPDATE provider_instances SET isActive = 0 WHERE type = ?`).run(target.type);
db.prepare(`UPDATE provider_instances SET isActive = 1 WHERE id = ?`).run(id);
}
} finally {
db.close();
}
}
static getActive(): LLMProviderInstance | null {
static update(
id: string,
name: string,
providerName: string,
apiKey?: string,
modelName?: string,
type: "generative" | "embedding" = "generative"
): void {
const db = getSettingsDb();
try {
// Query the DB
const row = db.prepare(`SELECT * FROM provider_instances WHERE isActive = 1`).get() as {
if (apiKey && apiKey.trim()) {
db.prepare(`
UPDATE provider_instances
SET name = ?, providerName = ?, apiKey = ?, modelName = ?, type = ?
WHERE id = ?
`).run(name, providerName, apiKey, modelName || null, type, id);
} else {
db.prepare(`
UPDATE provider_instances
SET name = ?, providerName = ?, modelName = ?, type = ?
WHERE id = ?
`).run(name, providerName, modelName || null, type, id);
}
} finally {
db.close();
}
}
static getActive(type: "generative" | "embedding" = "generative"): ModelProviderInstance | null {
const db = getSettingsDb();
try {
const row = db.prepare(`SELECT * FROM provider_instances WHERE isActive = 1 AND type = ?`).get(type) as {
id: string;
name: string;
providerName: string;
apiKey: string;
isActive: number;
modelName?: string;
type: string;
} | undefined;
if (!row) {
// Check if there are any rows at all
const totalCount = db.prepare(`SELECT COUNT(*) as count FROM provider_instances`).get() as { count: number };
if (totalCount.count === 0) {
// Database is completely empty! Check if GOOGLE_API_KEY env is set.
const envKey = process.env.GOOGLE_API_KEY;
if (envKey && envKey.trim()) {
// Auto-bootstrap default active instance from env
const id = "provider-default-env";
db.prepare(`
INSERT INTO provider_instances (id, name, providerName, apiKey, isActive, modelName)
VALUES (?, ?, ?, ?, ?, ?)
`).run(id, "Default (Env)", "google-genai", envKey, 1, "gemini-2.5-flash");
INSERT INTO provider_instances (id, name, providerName, apiKey, isActive, modelName, type)
VALUES (?, ?, ?, ?, ?, ?, ?)
`).run(id, "Default (Env)", "google-genai", envKey, 1, "gemini-2.5-flash", "generative");
const embedId = "provider-default-env-embed";
db.prepare(`
INSERT INTO provider_instances (id, name, providerName, apiKey, isActive, modelName, type)
VALUES (?, ?, ?, ?, ?, ?, ?)
`).run(embedId, "Default Embed (Env)", "google-genai", envKey, 1, "gemini-embedding-001", "embedding");
if (type === "embedding") {
return {
id: embedId,
name: "Default Embed (Env)",
providerName: "google-genai",
apiKey: envKey,
isActive: true,
modelName: "gemini-embedding-001",
type: "embedding",
};
}
return {
id,
@@ -173,6 +217,7 @@ export class ProviderManager {
apiKey: envKey,
isActive: true,
modelName: "gemini-2.5-flash",
type: "generative",
};
}
}
@@ -186,11 +231,22 @@ export class ProviderManager {
apiKey: row.apiKey,
isActive: true,
modelName: row.modelName || undefined,
type: (row.type as "generative" | "embedding") || "generative",
};
} catch {
// Lock or write issue fallback: return an in-memory active key if env key exists
const envKey = process.env.GOOGLE_API_KEY;
if (envKey) {
if (type === "embedding") {
return {
id: "provider-default-env-embed-fallback",
name: "Default Embed (Env Fallback)",
providerName: "google-genai",
apiKey: envKey,
isActive: true,
modelName: "gemini-embedding-001",
type: "embedding",
};
}
return {
id: "provider-default-env-fallback",
name: "Default (Env Fallback)",
@@ -198,6 +254,7 @@ export class ProviderManager {
apiKey: envKey,
isActive: true,
modelName: "gemini-2.5-flash",
type: "generative",
};
}
return null;

46
packages/llm/src/providers/google-genai.ts
View File

@@ -1,6 +1,6 @@
import { z } from "zod";
import { ChatGoogleGenerativeAI } from "@langchain/google-genai";
import { ILLMProvider, LLMRequest, LLMResponse, LLMCallRecord } from "../llm.js";
import { ChatGoogleGenerativeAI, GoogleGenerativeAIEmbeddings } from "@langchain/google-genai";
import { ILLMProvider, LLMRequest, LLMResponse, LLMCallRecord, IEmbeddingProvider } from "../llm.js";
import { llmConfig } from "../config.js";
import { ProviderManager } from "../provider-manager.js";
@@ -19,7 +19,7 @@ export class GeminiProvider implements ILLMProvider {
let model = modelName;
if (!key) {
const active = ProviderManager.getActive();
const active = ProviderManager.getActive("generative");
if (active) {
key = active.apiKey;
if (!model) {
@@ -78,3 +78,43 @@ export class GeminiProvider implements ILLMProvider {
return { success: true, data: parsed, usage };
}
}
export class GeminiEmbeddingProvider implements IEmbeddingProvider {
static readonly providerId = "google-genai";
static readonly displayName = "Google Gemini Embeddings";
providerName = "Gemini";
private model: GoogleGenerativeAIEmbeddings;
constructor(apiKey?: string, modelName?: string) {
let key = apiKey;
let model = modelName;
if (!key) {
const active = ProviderManager.getActive("embedding");
if (active) {
key = active.apiKey;
if (!model) {
model = active.modelName;
}
}
}
if (!key) {
key = llmConfig.GOOGLE_API_KEY;
}
if (!key) {
throw new Error("GOOGLE_API_KEY is required to initialize GeminiEmbeddingProvider");
}
this.model = new GoogleGenerativeAIEmbeddings({
apiKey: key,
modelName: model || "gemini-embedding-001",
});
}
async embed(text: string): Promise<number[]> {
return this.model.embedQuery(text);
}
}

20
packages/llm/src/providers/mock.ts
View File

@@ -1,5 +1,5 @@
import { z } from "zod";
import { ILLMProvider, LLMRequest, LLMResponse, LLMCallRecord } from "../llm.js";
import { ILLMProvider, LLMRequest, LLMResponse, LLMCallRecord, IEmbeddingProvider } from "../llm.js";
export class MockLLMProvider implements ILLMProvider {
static readonly providerId = "mock";
@@ -34,3 +34,21 @@ export class MockLLMProvider implements ILLMProvider {
}
}
}
export class MockEmbeddingProvider implements IEmbeddingProvider {
static readonly providerId = "mock";
providerName = "mock";
constructor(private modelName?: string) {}
async embed(text: string): Promise<number[]> {
// Return a deterministic mock 768-dimensional vector based on the text
const vec = new Array(768).fill(0).map((_, i) => {
// Return a predictable float between -1.0 and 1.0
const charCode = text.charCodeAt(i % text.length) || 0;
return Math.sin(charCode + i);
});
return vec;
}
}

2
packages/llm/src/providers/openrouter.ts
View File

@@ -19,7 +19,7 @@ export class OpenRouterProvider implements ILLMProvider {
let model = modelName;
if (!key) {
const active = ProviderManager.getActive();
const active = ProviderManager.getActive("generative");
if (active) {
key = active.apiKey;
if (!model) {