Workflows Multi-Étapes

import { plan, retrieve, generate, verify, improve, custom } from 'orkajs';
 
// plan(): Break down the task into sub-steps
plan()
 
// retrieve(): Search RAG in a knowledge base
retrieve('knowledge-name', { topK: 3 })
 
// generate(): LLM generation with options
generate({
  systemPrompt: 'You are a professional assistant.',
  temperature: 0.3,
  maxTokens: 1000,
})
 
// verify(): Verify the quality of the output
verify({
  criteria: [
    'The response is relevant to the question',
    'The response is based on the provided context',
    'The response is professional',
  ],
})
 
// improve(): Improve the output iteratively
improve({
  maxIterations: 2,
  improvementPrompt: 'Improve this response to make it more concise.',
})
 
// custom(): Custom step
custom('my-step', async (ctx) => {
  ctx.output = await myCustomLogic(ctx.input);
  return ctx;
})

import { 
  createOrka, 
  OpenAIAdapter, 
  MemoryVectorAdapter,
  plan, retrieve, generate, verify, improve,
} from 'orkajs';
 
async function main() {
  const orka = createOrka({
    llm: new OpenAIAdapter({ apiKey: process.env.OPENAI_API_KEY! }),
    vectorDB: new MemoryVectorAdapter(),
  });
 
  // Create a knowledge base
  await orka.knowledge.create({
    name: 'support',
    source: [
      { text: 'To reset your password, go to Settings > Security.', metadata: { topic: 'password' } },
      { text: 'Refunds are processed within 5 business days.', metadata: { topic: 'refund' } },
      { text: 'Support disponible du lundi au vendredi, 9h-18h.', metadata: { topic: 'hours' } },
      { text: 'Contact: support@example.com ou 01 23 45 67 89.', metadata: { topic: 'contact' } },
    ],
  });
 
  // Create a multi-step workflow
  const supportWorkflow = orka.workflow({
    name: 'support-response',
    steps: [
      plan(),
      retrieve('support', { topK: 3 }),
      generate({ 
        systemPrompt: 'You are a professional and empathetic customer support agent.' 
      }),
      verify({ 
        criteria: [
          'The response is relevant to the question',
          'The response is based on the provided context',
          'The response is professional and empathetic',
        ]
      }),
      improve({ maxIterations: 1 }),
    ],
    onStepComplete: (step) => {
      console.log(`✅ Step "${step.stepName}" completed (${step.latencyMs}ms)`);
    },
    maxRetries: 1,
  });
 
  console.log('🔄 Running workflow...\n');
  const result = await supportWorkflow.run('How can I reset my password?');
 
  console.log(`\n📝 Output: ${result.output}`);
  console.log(`\n📊 Stats:`);
  console.log(`  - Steps: ${result.steps.length}`);
  console.log(`  - Total latency: ${result.totalLatencyMs}ms`);
  console.log(`  - Total tokens: ${result.totalTokens}`);
 
  await orka.knowledge.delete('support');
}
 
main().catch(console.error);

interface WorkflowResult {
  output: string;           // Final output of the workflow
  steps: StepResult[];      // Results of each step
  totalLatencyMs: number;   // Total execution time
  totalTokens: number;      // Total tokens consumed
  metadata: Record<string, unknown>;
}
 
interface StepResult {
  stepName: string;
  output: string;
  latencyMs: number;
  tokens: number;
  success: boolean;
  error?: string;
}
 
// Example of analyzing results
const result = await workflow.run('How can I reset my password?');
 
// Analyze each step
for (const step of result.steps) {
  console.log(`${step.stepName}: ${step.success ? '✅' : '❌'} (${step.latencyMs}ms)`);
  if (!step.success) {
    console.log(`  Error: ${step.error}`);
  }
}
 
// Calculate estimated cost
const costPer1kTokens = 0.002; // GPT-4o-mini
const estimatedCost = (result.totalTokens / 1000) * costPer1kTokens;
console.log(`Estimated cost: $${estimatedCost.toFixed(4)}`);