---
title: "agents.step.appended@1 · OpenVibe.Services"
canonical: "https://openvibe.services/docs/contracts/agents.step.appended"
updated: null
---

# agents.step.appended@1 · OpenVibe.Services

HTML: [agents.step.appended@1 · OpenVibe.Services](https://openvibe.services/docs/contracts/agents.step.appended)

# AgentsStepAppendedPayload `agents.step.appended@1`

Generated at 2026-11-13 06:25:48 UTC from [`openvibe-contracts v0.419.0`](https://github.com/OpenVibers/OpenVibe.Contracts/tree/v0.419.0) and [`openvibe-sdk v0.161.0`](https://github.com/OpenVibers/OpenVibe.SDK/tree/v0.161.0).

- Version: 1.0.0
- Owner: actor
- Visibility: first-party
- Status: active
- Compatibility: backward
- Decision: [ADR-044](/docs/adr/ADR-044)
- Schema: [`https://openvibe.network/contracts/events/payloads/agents.step.appended.v1.json`](/docs/contracts/agents.step.appended.json)

agents.step.appended v1 (one agent system, 2026-11-12). A step was appended to a run: the payload is the appended agents.step@1, whole. OpenVibe.Events carries it with the run's owner as the subject, the product that ran it as the source (actor, codes, run, …) and visibility subject; a reader follows a run live without polling the step log. The namespace is agents (hyphen-free: Events namespaces cannot contain a hyphen). One producer per run: the product that stores the run publishes its steps, and the step's own product names the agent.

## Fields

This schema has no named fields.

## Examples

From the contract's own test fixtures: valid ones validate, rejected ones must fail.

 Valid: message

~~~~
{
  "run_id": "tsk_01K9R2V6M8Q4T0B7C3D5E9F2GH",
  "seq": 6,
  "kind": "message",
  "text": "I found the failing test and am fixing it.",
  "started_at": "2026-11-12T10:00:30Z",
  "ended_at": "2026-11-12T10:00:30Z"
}
~~~~

Rejected: missing-seq

~~~~
{
  "run_id": "tsk_01K9R2V6M8Q4T0B7C3D5E9F2GH",
  "kind": "message",
  "text": "A step without its place in the log.",
  "started_at": "2026-11-12T10:00:30Z"
}
~~~~

## Validate

~~~~
const contracts = require('openvibe-contracts');
contracts.validate('agents.step.appended@1', value);   // { valid, errors: [{ path, message }] }
~~~~