@execlave/sdk

Official JavaScript/TypeScript SDK for the Execlave AI agent governance platform.

Framework integrations — use the LangChain callback handler for automatic tracing and policy enforcement, or see all integrations. Get an API key.

Installation

npm install @execlave/sdk

Quick Start

import { Execlave, AgentPausedError, PolicyBlockedError } from '@execlave/sdk';

// Initialize the SDK
const ag = new Execlave({
  apiKey: 'exe_prod_xxx', // or set EXECLAVE_API_KEY env var
  environment: 'production',
});

// Register your agent (idempotent — call on startup)
const agent = await ag.registerAgent({
  agentId: 'my-chatbot',
  name: 'Customer Support Bot',
  type: 'chatbot',
  platform: 'custom',
});

// Canonical pattern: enforce policies BEFORE the LLM call, then trace it.
async function handleMessage(userQuestion: string) {
  const trace = ag.startTrace({ agentId: 'my-chatbot', sessionId: 'sess_123' });
  trace.setInput(userQuestion);

  try {
    // Pre-execution enforcement is SYNCHRONOUS and MUST run before the LLM call.
    // Throws PolicyBlockedError if a block-mode policy (e.g. prompt injection) fires.
    await ag.enforcePolicy({ agentId: 'my-chatbot', input: userQuestion });

    const answer = await llm.call(userQuestion);

    trace.setOutput(answer).setModel('gpt-4-turbo').setTokens(150, 300).setCost(0.012).finish();
    return answer;
  } catch (err) {
    if (err instanceof PolicyBlockedError) {
      trace.setOutput('[BLOCKED BY POLICY]').finish('error', err.message);
      return 'Your input was blocked by our content policies.';
    }
    if (err instanceof AgentPausedError) {
      trace.finish('error', err.message);
      return 'Service temporarily unavailable.';
    }
    trace.finish('error', String(err));
    throw err;
  }
}

// Prompt management
const version = await agent.deployPrompt({
  promptTemplate: 'You are a helpful assistant. Answer: {question}',
  systemMessage: 'Be concise.',
  modelName: 'gpt-4-turbo',
  changeSummary: 'Improved conciseness',
});

// Graceful shutdown (flushes remaining traces)
await ag.shutdown();

Important: tracing alone does NOT block LLM calls. Trace ingestion creates incidents post-hoc. To block requests before they reach the LLM, you MUST call ag.enforcePolicy() and handle PolicyBlockedError as shown above. The enableInjectionScan option only tags traces with an injection score — it does not block.

Configuration

API Reference

Execlave

• ping() — Check API connectivity
• registerAgent(opts) — Register an AI agent
• enforcePolicy(opts) — Synchronous pre-execution policy check. Call this BEFORE every LLM invocation. Throws PolicyBlockedError on a block-mode violation, AgentPausedError if the agent is kill-switched, EnforcementUnavailableError only when configured fail_closed. opts: { agentId, input, model?, metadata? }
• startTrace(opts) — Start a manual trace (post-hoc; does not block)
• wrap(fn, opts) — Wrap a function with automatic tracing
• checkAgentStatus(agentId?) — Get agent status
• flush() — Flush buffered traces
• shutdown() — Flush and shut down

Errors

• PolicyBlockedError — A block-mode policy fired. Has a violations: PolicyViolation[] field with policyType, policyName, severity, message, enforcementMode.
• AgentPausedError — Agent is kill-switched.
• EnforcementUnavailableError — Enforcement API unreachable AND enforcementOnOutage: 'fail_closed'.

Agent

• deployPrompt(opts) — Deploy a new prompt version
• getCurrentPrompt() — Get the deployed prompt
• listPromptVersions() — List all versions
• refreshStatus() — Refresh agent status
• isPaused — Whether agent is kill-switched

Trace

• setInput(data) — Set input data (chainable)
• setOutput(data) — Set output data (chainable)
• setModel(name) — Set model name (chainable)
• setTokens(prompt, completion) — Set token counts (chainable)
• setCost(usd) — Set cost (chainable)
• addMetadata(meta) — Add metadata (chainable)
• finish(status?, error?, errorType?) — Submit the trace

Zero Dependencies

This SDK has zero runtime dependencies. It uses Node.js built-in http/https modules for network requests.

Legal

By using this SDK, you agree to the Execlave Terms of Service.

• Privacy Policy
• Acceptable Use Policy
• Responsible AI
• Security

License

MIT — see LICENSE for details.