@kakunin/langchain

Kakunin compliance tools for LangChain JS — verify agent certificates and enforce scopes inside tools and chains.

npm install @kakunin/langchain @langchain/core @kakunin/sdk

import { Kakunin } from '@kakunin/sdk';
import { KakuninToolGuard } from '@kakunin/langchain';

const kakunin = new Kakunin({ apiKey: process.env.KAKUNIN_API_KEY! });

// Wrap any LangChain tool — scope is verified before every call
const guarded = new KakuninToolGuard({
  kakunin,
  agentId: 'agt-123',
  tool: myTool,
  requiredScopes: ['trade.execute'],
});

Also exports langchainScopeCallback (chain-level guard), KakuninScopeCallbackHandler, and ScopeViolationError. Licensed under Apache-2.0.