Is @jeffober/thatch safe?
Persistent memory for AI coding agents — local embeddings, SQLite stores, zero config. Works with OpenCode (as a plugin), Claude Code (as an MCP server), and Cursor (as an MCP server).
This server can run commands on your computer. An agent that is tricked could use it to do almost anything you can.
Why: can run shell commands on your computer.
What it can do
- Runs shell commands
- Writes or deletes files
- Reads files
- Calls internet services
Tools it offers your AI (40+):
- focus
- memory_remember
- memory_recall
- memory_list
- memory_show
- memory_forget
- store_list
- find_duplicates
- dedup_mark_checked
- get_extraction_payload
- extraction_done
- prediction_query
- prediction_update
- prediction_list
- prediction_delete
- prediction_mark_checked
- behavior_codify
- behavior_feedback
- behavior_list
- behavior_delete
- config_get
- config_set
- notify_user
- get_session_info
- exit
- compact
- session_search
- session_get
- watch_create
- watch_list
- watch_branch_create
- watch_command_create
- watch_cancel
- chat_register
- chat_list
- chat_send
- chat_read
- chat_unregister
- chat_broadcast
- chat_status
How to use it safely
- ✓ Run it in a container or VM, and keep "approve each tool call" turned on.
- ✓ Point it at one project folder, never your home directory or a whole drive.
- ✓ Only give it the folders it needs; files it reads can end up in the AI’s context.
- ✓ Content it fetches from the internet can carry prompt-injection instructions.
- ✓ Pin the version (below) so an update can't change what it does without you noticing.
Code patterns worth reviewing
Automated pattern matches in the published package. Some are expected for this kind of server, and some may be false positives — they are pointers for review, not confirmed vulnerabilities.
Command injection risk
The agent appears to pass input into a shell or command execution path.
src/chat.ts:2
SQL query built from unescaped input
A SQL statement is assembled by string concatenation, formatting, or interpolation instead of bound parameters.
src/db.ts:1255
Install it pinned
{
"mcpServers": {
"thatch": {
"command": "npx",
"args": ["-y", "@jeffober/thatch@0.3.4"]
}
}
}Check your whole MCP setup
Agent Verify checks the servers in your Claude, Cursor and VS Code config — including whole-drive access and keys stored in plain text.
Maintain @jeffober/thatch?
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Agent Verify reads the package published on npm as text — it is never installed or run. Ratings describe capability, not intent, and are an automated, evidence-based check, not a guarantee. Scanner 2.0.0.