lemon-model

Common shared model definitions for both backend and frontend.

Usage

!TIP! to develop backend api, use lemon-core instead of this.

# install with npm
npm install --save lemon-model

Backend API services that need the full Lemon runtime should use lemon-core.

Import

import type { NextContext } from 'lemon-model';

const { HttpAbstractGenAI } = require('lemon-model');

Frontend bundlers use the ESM build. Existing Node require() consumers use the CommonJS build.

Package Map

Area	Responsibility	Detail Doc
types	Shared request, identity, storage, and service shapes	Source types
cores	Small shared transform helpers	Source tests
socket	Peer socket, network contract, WebSocket bridge, JSON chunk transport	src/socket/README.md
buffer	Provider-neutral GenAI stream buffering and network adapters	src/buffer/README.md
genai	Gemini-like generateContent() adapter over Lemon agents APIs	src/genai/README.md
samples	Real usage cases and PR-ready sample notes	samples/README.md

User Sequence

sequenceDiagram
    participant App as App or service
    participant Package as lemon-model
    participant TS as TypeScript
    participant Runtime

    App->>Package: Install package
    App->>Package: Import selected type or helper
    Package-->>TS: Shared declarations
    TS-->>App: Contract check
    App->>Runtime: Run selected helper
    Runtime-->>App: Typed result

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1. App installs lemon-model
2. App imports only the needed type or helper
3. TypeScript checks shared contracts
4. Runtime loads CJS or ESM build
5. Selected module handles its own job
6. Module README owns detailed behavior

Choosing A Module

flowchart TD
    A[Need shared code] --> B{Need runtime behavior}
    B -- No --> C[Use types]
    B -- Yes --> D{Which behavior}
    D -- Data transforms --> E[Use cores]
    D -- Socket or network test --> F[Use socket]
    D -- GenAI stream batching --> J[Use buffer]
    D -- Agents generateContent --> G[Use genai]
    F --> H[Read src/socket/README.md]
    G --> I[Read src/genai/README.md]
    J --> K[Read src/buffer/README.md]

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Main branch: type-only, transform helper, socket flow, GenAI stream buffer, or GenAI proxy.

Buffer

buffer provides provider-neutral stream primitives for GenAI responses.

import { GenAIStreamBuffer, createGenAIStreamNetworkConsumer } from 'lemon-model';

Use it when a provider emits small stream fragments and the app needs consistent start, chunk, progress, flush, eof, and error events.

The network adapter can send GenAIStreamEvent over the shared socket/json-transport layer. Diagnostic helpers live under lemon-model/buffer/testing.

Provider probe tools are available under tools/, but provider SDKs are not part of the runtime package contract. Install the matching SDK in the workspace where you run a probe.

Build Formats

• CommonJS entry: dist/index.js
• ESM entry: dist/esm/index.js
• Type declarations: dist/index.d.ts
• Package export: import { ... } from 'lemon-model'
• Test helper exports: lemon-model/genai/testing, lemon-model/buffer/testing, lemon-model/socket/testing

Module Docs

• src/socket/README.md: peer socket and network contract
• src/socket/JSON_TRANSPORT_SPEC.md: JSON chunk transport protocol
• src/buffer/README.md: GenAI stream buffering and network adapter contract
• src/genai/README.md: GenAI adapter contract
• samples/README.md: sample case rules

Contribution

Plz, request PR.

See CODE_OF_CONDUCT

LICENSE

MIT - (C) 2019 LemonCloud Co Ltd. - All Rights Reserved.„

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VERSION INFO

Version	Description
1.0.6	optimized SearchBody with knn support.
1.0.5	optimized NextIdentity with authorization.
1.0.4	optimized NextIdentity with referer and origin.
1.0.3	optimized NextIdentityCognito
1.0.0	initial types out of the original lemon-core@3.1.1