Agent Interfaces & Contracts: How Agents Communicate Safely

{
  "byte_id": "agentic_dev_019",
  "title": "Agent Interfaces & Contracts: How Agents Communicate Safely",
  "level": "applied",
  "domain": [
    "agentic-development",
    "architecture",
    "interfaces"
  ],
  "intent": "Understand how agents should communicate with other agents and systems using strict contracts instead of free text.",
  "core_idea": {
    "one_liner": "Agents must talk like APIs, not like humans.",
    "why_it_matters": [
      "Free text breaks coordination.",
      "Contracts make agent interactions debuggable.",
      "Clear interfaces prevent cascading failures."
    ]
  },
  "definition": {
    "agent_interface": "A formally defined input/output contract that governs how an agent receives requests and returns results."
  },
  "interface_principles": [
    "Structured inputs and outputs only",
    "Explicit success and failure states",
    "No hidden assumptions",
    "Backward compatibility where possible"
  ],
  "typical_interface_fields": [
    "request_id",
    "intent",
    "inputs",
    "constraints",
    "expected_output",
    "confidence",
    "status"
  ],
  "agent_to_agent_contract_example": {
    "request": {
      "request_id": "REQ-1021",
      "intent": "analyze_replication_issue",
      "inputs": {
        "system": "MDG-S4",
        "object": "BP",
        "symptom": "delay"
      },
      "constraints": {
        "read_only": true
      }
    },
    "response": {
      "request_id": "REQ-1021",
      "status": "completed",
      "result": {
        "root_cause": "queue_backlog",
        "confidence": 0.81
      }
    }
  },
  "micro_example": {
    "scenario": "Planner agent delegates to RCA agent",
    "bad": "Hey, can you check why this is slow?",
    "good": "Structured request with intent, scope, and constraints."
  },
  "failure_modes": [
    "Free-text delegation",
    "Implicit context sharing",
    "Changing contracts without versioning",
    "Overloading one interface with multiple meanings"
  ],
  "guards": [
    "All agent interactions must use contracts.",
    "Contracts must be versioned.",
    "Validation is mandatory before execution."
  ],
  "teach_it_in_english": {
    "simple_explanation": "Agents should communicate the same way services do.",
    "one_sentence_definition": "Agent interfaces turn cooperation into engineering."
  },
  "practical_checklist": [
    "Is the message machine-readable?",
    "Can it be validated automatically?",
    "Is failure explicitly represented?",
    "Can this interface evolve safely?"
  ],
  "tags": [
    "agent-interfaces",
    "contracts",
    "multi-agent",
    "architecture"
  ],
  "meta": {
    "schema": "dkharlanau.dataset.byte",
    "schema_version": "1.1",
    "dataset": "agentic-bytes",
    "source_project": "cv-ai",
    "source_path": "agentic-bytes/agentic_dev_019.json",
    "generated_at_utc": "2026-02-03T14:33:32+00:00",
    "creator": {
      "name": "Dzmitryi Kharlanau",
      "role": "SAP Lead",
      "website": "https://dkharlanau.github.io",
      "linkedin": "https://www.linkedin.com/in/dkharlanau"
    },
    "attribution": {
      "attribution_required": true,
      "preferred_citation": "Dzmitryi Kharlanau (SAP Lead). Dataset bytes: https://dkharlanau.github.io"
    },
    "license": {
      "name": "",
      "spdx": "",
      "url": ""
    },
    "links": {
      "website": "https://dkharlanau.github.io",
      "linkedin": "https://www.linkedin.com/in/dkharlanau"
    },
    "contact": {
      "preferred": "linkedin",
      "linkedin": "https://www.linkedin.com/in/dkharlanau"
    },
    "canonical_url": "https://dkharlanau.github.io/datasets/agentic-bytes/agentic_dev_019.json",
    "created_at_utc": "2026-02-03T14:33:32+00:00",
    "updated_at_utc": "2026-02-03T15:29:02+00:00",
    "provenance": {
      "source_type": "chat_export_extraction",
      "note": "Extracted and curated by Dzmitryi Kharlanau; enriched for attribution and crawler indexing."
    },
    "entity_type": "agentic_byte",
    "entity_subtype": "level:applied",
    "summary": "Understand how agents should communicate with other agents and systems using strict contracts instead of free text."
  }
}