justinandClaude Opus 5
94025b8d69
zerto_recover_file passed the guest absolute path straight to
POST /v1/flrs/{session}/download, which the ZVM rejects:
HTTP 400 {"Message":"Invalid path: check location exists or
correct path syntax."}
FLR browse/download is rooted at partitions, not the guest's /.
/home/justin/app-config.yaml is Volume2-Ext4/home/justin/app-config.yaml.
server.py already called browse_flr() but discarded the result, so
nothing ever resolved the path.
Add resolve_flr_path() and browsable_partitions() to recover.py:
- browse path "" returns {MainPathItem, PathItems}, not a bare list
- skip partitions with IsBrowsable false. A Linux guest reports
Volume1-Unknown as "Cannot restore. Partition type Unknown is not
supported." Do not assume the first partition is the right one.
- browse returns child paths percent-encoded
(Volume2-Ext4%2fhome%2fjustin%2fapp-config.yaml); download wants
them decoded with plain slashes
- raise a ZertoError naming what was searched when the file is
absent, since "not replicated into that checkpoint yet" is the
likely cause and is actionable
zerto_recover_file now returns the resolved flr_path.
Verified end to end against ZVM 10.x: guard tagged cp 1075 on VPG
jp-ubuntu, FLR mounted in ~3s, 158 bytes recovered from the
pre-mutation checkpoint with matching content.
Co-Authored-By: Claude Opus 5 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_016yVfC5nvZowoLFnEGWhLGn
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
zerto_find_protection— VM name, hostname, or vmIdentifier to exactly one VM and every VPG. Zero or two-plus VMs: stop.zerto_create_tagged_checkpoint/zerto_guard_before_mutate— same tag on every protecting VPG, wait until listed.zerto_recover_file— FLR after a human setsconfirmed=true.- 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+.
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):
{
"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.
pytest
Demo
Protected app VM. Agent is about to edit a guest config file.
- Guard: discover VPG set, insert tagged checkpoint, wait.
- Agent writes the bad config.
- Human confirms.
zerto_recover_filefrom 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 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.