feat: long-memory

.env.example

@@ -1,10 +1,8 @@
 # Server
 API_SERVER_PORT=7002
-DEVICE_API_SERVER_PORT=7001
 WEB_PORT=7003
 
 API_BASE_URL=http://localhost:7002
-DEVICE_API_BASE_URL=http://localhost:7001
 WEB_URL=http://localhost:7003
 
 # Database (PostgreSQL)

packages/agent/package.json

@@ -3,20 +3,15 @@
   "version": "1.0.0",
   "description": "Agent package for the phonetutor monorepo",
   "scripts": {
-    "test": "vitest",
-    "start": "bun run src/client/index.ts"
+    "test": "vitest"
   },
   "keywords": [],
   "author": "Phonetutor",
   "license": "ISC",
   "packageManager": "pnpm@10.27.0",
   "dependencies": {
-    "@ai-sdk/anthropic": "^3.0.7",
-    "@ai-sdk/google": "^3.0.6",
-    "@ai-sdk/openai": "^3.0.7",
-    "@byteagent/shared": "workspace:*",
-    "ai": "^6.0.14",
     "dotenv": "^17.2.3",
+    "xsai": "^0.4.1",
     "zod": "^4.3.5"
   }
 }

packages/agent/src/agent.ts

@@ -0,0 +1,3 @@
+import { streamText } from 'xsai'
+
+streamText({})

packages/agent/src/prompts/index.ts

@@ -0,0 +1 @@
+export * from './system'

packages/agent/src/prompts/system.ts

@@ -0,0 +1,21 @@
+export interface SystemParams {
+  date: Date
+  locale: Intl.LocalesArgument
+}
+
+export const system = ({ date, locale }: SystemParams) => {
+  return `
+  ---
+  date: ${date.toLocaleDateString(locale)}
+  time: ${date.toLocaleTimeString(locale)}
+  language: ${locale}
+  timezone: ${date.getTimezoneOffset()}
+  ---
+  You are a personal housekeeper assistant, which able to manage the master's daily affairs.
+
+  Your abilities:
+  - Long memory: You possess long-term memory; conversations from the last 24 hours will be directly loaded into your context. Additionally, you can use tools to search for past memories.
+  - Scheduled tasks: You can create scheduled tasks to automatically remind you to do something.
+  - Messaging: You may allowed to use message software to send messages to the master.
+  `.trim()
+}

packages/db/src/index.ts

@@ -1,3 +1,6 @@
 import { drizzle } from 'drizzle-orm/node-postgres'
+import { config } from 'dotenv'
 
-export const db = drizzle(process.env.DATABASE_URL!)
+config({ path: '../../' })
+
+export const db = drizzle(process.env.DATABASE_URL!)

packages/db/src/memory.ts

@@ -0,0 +1,16 @@
+import { pgTable, timestamp, uuid, jsonb, text, vector, index } from 'drizzle-orm/pg-core'
+
+export const memory = pgTable(
+  'memory', 
+  {
+    id: uuid('id').primaryKey().defaultRandom(),
+    messages: jsonb('messages').notNull(),
+    timestamp: timestamp('timestamp').notNull(),
+    user: text('user').notNull(),
+    rawContent: text('raw_content').notNull(),
+    embedding: vector('embedding', { dimensions: 1536 }).notNull(),
+  },
+  (table) => [
+    index('embedding_index').using('hnsw', table.embedding.op('vector_cosine_ops')),
+  ]
+)

packages/db/src/model.ts

@@ -1,10 +0,0 @@
-import { pgTable, text, uuid } from 'drizzle-orm/pg-core'
-
-export const model = pgTable('model', {
-  id: uuid('id').primaryKey(),
-  modelId: text('model_id').notNull(),
-  name: text('name'),
-  baseUrl: text('base_url').notNull(),
-  apiKey: text('api_key').notNull(),
-  clientType: text('client_type').notNull()
-})

packages/db/src/schema.ts

@@ -1 +1 @@
-export * from './model'
+export * from './memory'

packages/memory/README.md

@@ -0,0 +1 @@
+# @byteagent/memory

packages/memory/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "@byteagent/memory",
+  "version": "1.0.0",
+  "description": "",
+  "exports": {
+    ".": "./src/index.ts"
+  },
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "packageManager": "pnpm@10.27.0",
+  "dependencies": {
+    "@byteagent/db": "workspace:*",
+    "drizzle-orm": "^0.45.1",
+    "xsai": "^0.4.1"
+  }
+}

packages/memory/src/add.ts

@@ -0,0 +1,34 @@
+import { embed } from 'xsai'
+import { EmbedParams } from './types'
+import { MemoryUnit } from './memory-unit'
+import { rawMemory } from './raw'
+import { db } from '@byteagent/db'
+import { memory } from '@byteagent/db/schema'
+
+export interface AddMemoryParams extends EmbedParams {
+  locale: Intl.LocalesArgument
+}
+
+export interface AddMemoryInput {
+  memory: MemoryUnit
+}
+
+export const createAddMemory = (params: AddMemoryParams) =>
+  async ({ memory: memoryUnit }: AddMemoryInput) => {
+    const rawContent = rawMemory(memoryUnit, params.locale)
+    const { embedding } = await embed({
+      model: params.model,
+      input: rawContent,
+      apiKey: params.apiKey,
+      baseURL: params.baseURL,
+    })
+    await db.insert(memory)
+      .values({
+        timestamp: memoryUnit.timestamp,
+        user: memoryUnit.user,
+        rawContent,
+        embedding,
+        messages: memoryUnit.messages,
+      })
+      .onConflictDoNothing()
+  }

packages/memory/src/filter.ts

@@ -0,0 +1,58 @@
+import { db } from '@byteagent/db'
+import { memory } from '@byteagent/db/schema'
+import { and, gte, lte, asc, sql, cosineDistance, gt, desc, eq } from 'drizzle-orm'
+import { MemoryUnit } from './memory-unit'
+
+export const filterByTimestamp = async (
+  from: Date,
+  to: Date,
+  user: string,
+) => {
+  const results = await db
+    .select()
+    .from(memory)
+    .where(and(
+      gte(memory.timestamp, from),
+      lte(memory.timestamp, to),
+      eq(memory.user, user),
+    ))
+    .orderBy(asc(memory.timestamp))
+
+  return results.map((result) => ({
+    messages: result.messages,
+    timestamp: new Date(result.timestamp),
+    user: result.user,
+    raw: result.rawContent,
+  })) as MemoryUnit[]
+}
+
+export const filterByEmbedding = async (
+  embedding: number[],
+  user: string,
+  limit: number = 10,
+) => {
+  const similarity = sql<number>`1 - (${cosineDistance(memory.embedding, embedding)})`
+  const results = await db
+    .select({
+      similarity,
+      messages: memory.messages,
+      timestamp: memory.timestamp,
+      user: memory.user,
+      rawContent: memory.rawContent,
+      embedding: memory.embedding,
+      id: memory.id,
+    })
+    .from(memory)
+    .where(and(
+      gt(similarity, 0.5),
+      eq(memory.user, user),
+    ))
+    .orderBy((t) => desc(t.similarity))
+    .limit(limit)
+  return results.map((result) => ({
+    messages: result.messages,
+    timestamp: new Date(result.timestamp),
+    user: result.user,
+    raw: result.rawContent,
+  })) as MemoryUnit[]
+}

packages/memory/src/index.ts

@@ -0,0 +1,6 @@
+export * from './memory-unit'
+export * from './filter'
+export * from './add'
+export * from './search'
+export * from './types'
+export * from './raw'

packages/memory/src/memory-unit.ts

@@ -0,0 +1,8 @@
+import { Message } from 'xsai'
+
+export interface MemoryUnit {
+  messages: Message[]
+  timestamp: Date
+  user: string
+  raw: string
+}

packages/memory/src/raw.ts

@@ -0,0 +1,33 @@
+import { Message } from 'xsai'
+import { MemoryUnit } from './memory-unit'
+
+export const rawMessages = (messages: Message[]) => {
+  return messages.map((message) => {
+    if (message.role === 'user') {
+      return `User: ${message.content}`
+    } else if (message.role === 'assistant') {
+      let toolCalls = ''
+      if (message.tool_calls && message.tool_calls.length !== 0) {
+        toolCalls = `Tool Calls: ${message.tool_calls.map(t => t.function.name).join(', ')}`
+      }
+      return `You: ${message.content} \n${toolCalls}`
+    } else if (message.role === 'tool') {
+      return `Tool Result: ${message.content}`
+    } else {
+      return null
+    }
+  })
+  .filter((message) => message !== null)
+  .join('\n\n')
+}
+
+export const rawMemory = (memory: MemoryUnit, locale: Intl.LocalesArgument) => {
+  return `
+  ---
+  date: ${memory.timestamp.toLocaleDateString(locale)}
+  time: ${memory.timestamp.toLocaleTimeString(locale)}
+  timezone: ${memory.timestamp.getTimezoneOffset()}
+  ---
+  ${rawMessages(memory.messages)}
+  `.trim()
+}

packages/memory/src/search.ts

@@ -0,0 +1,23 @@
+import { embed } from 'xsai'
+import { filterByEmbedding } from './filter'
+import { EmbedParams } from './types'
+
+// eslint-disable-next-line @typescript-eslint/no-empty-object-type
+export interface MemorySearchParams extends EmbedParams { }
+
+export interface MemorySearchInput {
+  user: string
+  query: string
+  maxResults?: number
+}
+
+export const createMemorySearch = (params: MemorySearchParams) =>
+  async ({ user, query, maxResults = 10 }: MemorySearchInput) => {
+    const { embedding } = await embed({
+      model: params.model,
+      input: query,
+      apiKey: params.apiKey,
+      baseURL: params.baseURL,
+    })
+    return await filterByEmbedding(embedding, user, maxResults)
+  }

packages/memory/src/types.ts

@@ -0,0 +1,5 @@
+export interface EmbedParams {
+  baseURL: string
+  apiKey: string
+  model: string
+}

pnpm-lock.yaml

@@ -36,24 +36,12 @@ importers:
 
   packages/agent:
     dependencies:
-      '@ai-sdk/anthropic':
-        specifier: ^3.0.7
-        version: 3.0.7(zod@4.3.5)
-      '@ai-sdk/google':
-        specifier: ^3.0.6
-        version: 3.0.6(zod@4.3.5)
-      '@ai-sdk/openai':
-        specifier: ^3.0.7
-        version: 3.0.7(zod@4.3.5)
-      '@byteagent/shared':
-        specifier: workspace:*
-        version: link:../shared
-      ai:
-        specifier: ^6.0.14
-        version: 6.0.14(zod@4.3.5)
       dotenv:
         specifier: ^17.2.3
         version: 17.2.3
+      xsai:
+        specifier: ^0.4.1
+        version: 0.4.1(zod@4.3.5)
       zod:
         specifier: ^4.3.5
         version: 4.3.5
@@ -90,6 +78,18 @@ importers:
         specifier: ^4.21.0
         version: 4.21.0
 
+  packages/memory:
+    dependencies:
+      '@byteagent/db':
+        specifier: workspace:*
+        version: link:../db
+      drizzle-orm:
+        specifier: ^0.45.1
+        version: 0.45.1(@opentelemetry/api@1.9.0)(@types/pg@8.16.0)(bun-types@1.3.5)(pg@8.16.3)
+      xsai:
+        specifier: ^0.4.1
+        version: 0.4.1(zod@4.3.5)
+
   packages/shared: {}
 
   packages/ui:
@@ -222,40 +222,6 @@ importers:
 
 packages:
 
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-    engines: {node: '>=18'}
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-    engines: {node: '>=18'}
-    peerDependencies:
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     engines: {node: ^20.19.0 || >=22.12.0}
@@ -1505,6 +1467,54 @@ packages:
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+
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+
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+
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+
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+
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+
+  '@xsai/model@0.4.1':
+    resolution: {integrity: sha512-rhXcKQnJWFWPfvo3UUw1eRXeNWD8IEu/EFw01FZ/MGiQ3TEMppXIiQSLkQFiWylfx5TrucQIzEbE/QBKjdWfkg==}
+
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+
+  '@xsai/shared@0.4.1':
+    resolution: {integrity: sha512-WptfJwv0ajc22UNvMgSbM2wCtJDWok6x3svljETMc3ycknHE3w5XQ6whbASdbeDJomb/MtGhFhaHYVQZQnqHIw==}
+
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+
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+
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+
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+  xsai@0.4.1:
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+
+  xsschema@0.4.1:
+    resolution: {integrity: sha512-v4kWVUoqF73IFDxONxb9cvl6EXolas1zUnS1ajR8d8RZdM897ByxHaTqw3QOPspuiLl3ML86Mk0ccVfwURHEBw==}
+    peerDependencies:
+      '@valibot/to-json-schema': ^1.0.0
+      arktype: ^2.1.20
+      effect: ^3.16.0
+      sury: ^10.0.0
+      zod: ^3.25.0 || ^4.0.0
+      zod-to-json-schema: ^3.25.0
+    peerDependenciesMeta:
+      '@valibot/to-json-schema':
+        optional: true
+      arktype:
+        optional: true
+      effect:
+        optional: true
+      sury:
+        optional: true
+      zod:
+        optional: true
+      zod-to-json-schema:
+        optional: true
+
   xtend@4.0.2:
     resolution: {integrity: sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==}
     engines: {node: '>=0.4'}
@@ -2933,42 +2956,6 @@ packages:
 
 snapshots:
 
-  '@ai-sdk/anthropic@3.0.7(zod@4.3.5)':
-    dependencies:
-      '@ai-sdk/provider': 3.0.2
-      '@ai-sdk/provider-utils': 4.0.4(zod@4.3.5)
-      zod: 4.3.5
-
-  '@ai-sdk/gateway@3.0.9(zod@4.3.5)':
-    dependencies:
-      '@ai-sdk/provider': 3.0.2
-      '@ai-sdk/provider-utils': 4.0.4(zod@4.3.5)
-      '@vercel/oidc': 3.1.0
-      zod: 4.3.5
-
-  '@ai-sdk/google@3.0.6(zod@4.3.5)':
-    dependencies:
-      '@ai-sdk/provider': 3.0.2
-      '@ai-sdk/provider-utils': 4.0.4(zod@4.3.5)
-      zod: 4.3.5
-
-  '@ai-sdk/openai@3.0.7(zod@4.3.5)':
-    dependencies:
-      '@ai-sdk/provider': 3.0.2
-      '@ai-sdk/provider-utils': 4.0.4(zod@4.3.5)
-      zod: 4.3.5
-
-  '@ai-sdk/provider-utils@4.0.4(zod@4.3.5)':
-    dependencies:
-      '@ai-sdk/provider': 3.0.2
-      '@standard-schema/spec': 1.1.0
-      eventsource-parser: 3.0.6
-      zod: 4.3.5
-
-  '@ai-sdk/provider@3.0.2':
-    dependencies:
-      json-schema: 0.4.0
-
   '@babel/code-frame@7.27.1':
     dependencies:
       '@babel/helper-validator-identifier': 7.28.5
@@ -3554,7 +3541,8 @@ snapshots:
 
   '@microsoft/tsdoc@0.16.0': {}
 
-  '@opentelemetry/api@1.9.0': {}
+  '@opentelemetry/api@1.9.0':
+    optional: true
 
   '@polka/url@1.0.0-next.29': {}
 
@@ -3887,8 +3875,6 @@ snapshots:
       '@typescript-eslint/types': 8.52.0
       eslint-visitor-keys: 4.2.1
 
-  '@vercel/oidc@3.1.0': {}
-
   '@vitejs/plugin-vue@6.0.3(vite@7.3.0(@types/node@24.10.4)(jiti@2.6.1)(lightningcss@1.30.2)(tsx@4.21.0))(vue@3.5.26(typescript@5.9.3))':
     dependencies:
       '@rolldown/pluginutils': 1.0.0-beta.53
@@ -4120,20 +4106,97 @@ snapshots:
     dependencies:
       vue: 3.5.26(typescript@5.9.3)
 
+  '@xsai/embed@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/generate-image@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/generate-object@0.4.1(zod@4.3.5)':
+    dependencies:
+      '@xsai/generate-text': 0.4.1
+      xsschema: 0.4.1(zod@4.3.5)
+    transitivePeerDependencies:
+      - '@valibot/to-json-schema'
+      - arktype
+      - effect
+      - sury
+      - zod
+      - zod-to-json-schema
+
+  '@xsai/generate-speech@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/generate-text@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+      '@xsai/shared-chat': 0.4.1
+
+  '@xsai/generate-transcription@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/model@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/shared-chat@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/shared@0.4.1': {}
+
+  '@xsai/stream-object@0.4.1(zod@4.3.5)':
+    dependencies:
+      '@xsai/stream-text': 0.4.1
+      xsschema: 0.4.1(zod@4.3.5)
+    transitivePeerDependencies:
+      - '@valibot/to-json-schema'
+      - arktype
+      - effect
+      - sury
+      - zod
+      - zod-to-json-schema
+
+  '@xsai/stream-text@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+      '@xsai/shared-chat': 0.4.1
+
+  '@xsai/stream-transcription@0.4.1':
+    dependencies:
+      '@xsai/shared': 0.4.1
+
+  '@xsai/tool@0.4.1(zod@4.3.5)':
+    dependencies:
+      '@xsai/shared': 0.4.1
+      '@xsai/shared-chat': 0.4.1
+      xsschema: 0.4.1(zod@4.3.5)
+    transitivePeerDependencies:
+      - '@valibot/to-json-schema'
+      - arktype
+      - effect
+      - sury
+      - zod
+      - zod-to-json-schema
+
+  '@xsai/utils-chat@0.4.1':
+    dependencies:
+      '@xsai/shared-chat': 0.4.1
+
+  '@xsai/utils-reasoning@0.4.1': {}
+
+  '@xsai/utils-stream@0.4.1': {}
+
   acorn-jsx@5.3.2(acorn@8.15.0):
     dependencies:
       acorn: 8.15.0
 
   acorn@8.15.0: {}
 
-  ai@6.0.14(zod@4.3.5):
-    dependencies:
-      '@ai-sdk/gateway': 3.0.9(zod@4.3.5)
-      '@ai-sdk/provider': 3.0.2
-      '@ai-sdk/provider-utils': 4.0.4(zod@4.3.5)
-      '@opentelemetry/api': 1.9.0
-      zod: 4.3.5
-
   ajv-draft-04@1.0.0(ajv@8.13.0):
     optionalDependencies:
       ajv: 8.13.0
@@ -4514,8 +4577,6 @@ snapshots:
 
   esutils@2.0.3: {}
 
-  eventsource-parser@3.0.6: {}
-
   exact-mirror@0.2.6(@sinclair/typebox@0.34.47):
     optionalDependencies:
       '@sinclair/typebox': 0.34.47
@@ -4655,8 +4716,6 @@ snapshots:
 
   json-schema-traverse@1.0.0: {}
 
-  json-schema@0.4.0: {}
-
   json-stable-stringify-without-jsonify@1.0.1: {}
 
   json5@2.2.3: {}
@@ -5383,6 +5442,36 @@ snapshots:
 
   xml-name-validator@4.0.0: {}
 
+  xsai@0.4.1(zod@4.3.5):
+    dependencies:
+      '@xsai/embed': 0.4.1
+      '@xsai/generate-image': 0.4.1
+      '@xsai/generate-object': 0.4.1(zod@4.3.5)
+      '@xsai/generate-speech': 0.4.1
+      '@xsai/generate-text': 0.4.1
+      '@xsai/generate-transcription': 0.4.1
+      '@xsai/model': 0.4.1
+      '@xsai/shared': 0.4.1
+      '@xsai/shared-chat': 0.4.1
+      '@xsai/stream-object': 0.4.1(zod@4.3.5)
+      '@xsai/stream-text': 0.4.1
+      '@xsai/stream-transcription': 0.4.1
+      '@xsai/tool': 0.4.1(zod@4.3.5)
+      '@xsai/utils-chat': 0.4.1
+      '@xsai/utils-reasoning': 0.4.1
+      '@xsai/utils-stream': 0.4.1
+    transitivePeerDependencies:
+      - '@valibot/to-json-schema'
+      - arktype
+      - effect
+      - sury
+      - zod
+      - zod-to-json-schema
+
+  xsschema@0.4.1(zod@4.3.5):
+    optionalDependencies:
+      zod: 4.3.5
+
   xtend@4.0.2: {}
 
   yallist@3.1.1: {}