# zerto-ai-rewind

PoC MCP that makes an agent pin a Zerto tagged checkpoint before it changes a VM, then pull a file back from that tag.

If the loop works, these tools are the delta to add to official ZVM MCP (`ZVM.MCP`, 10.9). This repo is one MCP process for the demo. It is not a second full ZVM catalog.

## What it does

1. `zerto_find_protection` — VM name, hostname, or vmIdentifier to exactly one VM and every VPG. Zero or two-plus VMs: stop.
2. `zerto_create_tagged_checkpoint` / `zerto_guard_before_mutate` — same tag on every protecting VPG, wait until listed. The name records which agent and what it is doing: `ai:<agent> | <action> | vm=<vm> | change=<id> | <utc>`.
3. `zerto_recover_file` — FLR after a human sets `confirmed=true`.
4. Mutating catalog — opt-in list of MCP tools that must be guarded. Unlisted tools pass through. Users add entries.

Official ZVM MCP already has inventory and failover test. It does not insert tagged checkpoints or run FLR.

## Setup

Python 3.12+.

```bash
python3 -m venv .venv
source .venv/bin/activate
pip install -e ".[dev]"
cp config.example.json config.json
# edit zerto_url, username, password
```

Keycloak password-grant, client_id `zerto-client` on 10.x. Appliance certs are self-signed; `verify_tls` defaults to false.

stdio MCP (Claude Desktop, VS Code, Cursor, OpenCode):

```json
{
  "mcpServers": {
    "zerto-rewind": {
      "command": "zerto-rewind-mcp",
      "env": {
        "ZERTO_REWIND_CONFIG": "/absolute/path/to/config.json"
      }
    }
  }
}
```

Copy `skills/zerto-rewind/SKILL.md` into the client's skill path.

```bash
pytest
```

## Demo

Protected app VM. Agent is about to edit a guest config file.

1. Guard: discover VPG set, insert tagged checkpoint, wait.
2. Agent writes the bad config.
3. Human confirms.
4. `zerto_recover_file` from that tag.

Git never had the file. RPO is the journal, not last night's backup.

## Certified for this PoC

vSphere ZVM 10.x and ZCA on AWS/Azure, same REST paths. HVM is out (separate swagger). Failover Live is not a tool.

Tagged checkpoints cannot be inserted when the **protected** site is Azure or AWS (Zerto API). Point this server at the vSphere protected ZVM.

## Not this product

[Moholo Agent Rewind](https://github.com/moholo-founder/agent-rewind) snapshots the agent's laptop tools. This server uses the Zerto journal as the snapshot store. Do not copy their file blobs.

## Upstream

Ask Zerto engineering to add to `ZVM.MCP`: find-by-unique-VM-with-all-VPGs, tagged checkpoint insert that waits, FLR. Keep VPG settings CRUD where it already is.