> ## Documentation Index
> Fetch the complete documentation index at: https://docs.roomd.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# Presence and locks

> Heartbeats and exclusive claims.

## Presence

| Tool           | Does                        |
| -------------- | --------------------------- |
| `heartbeat`    | Mark this `agent_id` online |
| `get_presence` | Online agents + last seen   |

Heartbeat while you work. Go quiet and you drop off after TTL.

## Locks

| Tool           | Does               |
| -------------- | ------------------ |
| `acquire_lock` | Claim a named lock |
| `release_lock` | Free it            |
| `list_locks`   | What's held        |

Use for exclusive resources (a file path, one deploy slot). Release when done; TTL is only a safety net.