# Vouch

Maintains a Git-tracked knowledge base where agents only propose updates for human approval. Useful when multiple tools or teammates share project documentation.

- MCP server · `type=mcp` · Claude Code, Codex, Cursor, GitHub Copilot, Windsurf (Devin Desktop), Cline, Zed, Gemini CLI · ★ 64
- Author: vouchdev
- License: MIT · policy=link-only · description only; the file stays with the author
- Source: https://github.com/vouchdev/vouch
- Updated: 2026-08-23
- HTML: https://affpapa.org/en/nevibecode/mcp/vouch

## What it does

Vouch converts project memory into plain files inside a `.vouch/` directory. Instead of letting models overwrite notes at will, it forces every edit through a manual review gate. Agents generate YAML claims, but entries become permanent only after a human signs off on them.

The system enforces source checks on every record. When running `vouch compile`, an LLM organizes raw claims into structured topic pages in Markdown. If an assertion lacks a valid content-hashed source citation, the engine flags it as an error.

Running the tool requires the `vouch-kb` package from PyPI via `uvx` or `pipx`. Teams needing an interactive dashboard can install `vouch-kb[web]` to spin up a local interface at `http://localhost:5173`. Without manual sign-off on queued edits, proposed statements never reach the permanent repository log.

## Requirements
- Needs: Python and uv (commands run via uvx)
- Environment variables: `VOUCH_KB_PATH` — keys and tokens: ask the human for the values, never commit them or put them in shared files.

## Install

### Claude Code (native platform)

**Platform CLI**
```bash
claude mcp add --env VOUCH_KB_PATH=<VOUCH_KB_PATH> --transport stdio vouch -- uvx vouch-kb
```
Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from vouch-kb <command>

### Codex

**Platform CLI**
```bash
codex mcp add vouch --env VOUCH_KB_PATH=<VOUCH_KB_PATH> -- uvx vouch-kb
```
Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from vouch-kb <command>

### Cursor

**Config file**
File `.cursor/mcp.json`:
```json
{
    "mcpServers": {
        "vouch": {
            "command": "uvx",
            "args": [
                "vouch-kb"
            ],
            "env": {
                "VOUCH_KB_PATH": "<VOUCH_KB_PATH>"
            }
        }
    }
}
```
Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from vouch-kb <command>

### GitHub Copilot

**Config file**
File `.vscode/mcp.json`:
```json
{
    "servers": {
        "vouch": {
            "type": "stdio",
            "command": "uvx",
            "args": [
                "vouch-kb"
            ],
            "env": {
                "VOUCH_KB_PATH": "<VOUCH_KB_PATH>"
            }
        }
    }
}
```
Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from vouch-kb <command>

### Gemini CLI

**Platform CLI**
```bash
gemini mcp add -e VOUCH_KB_PATH=<VOUCH_KB_PATH> vouch uvx vouch-kb
```
Replace <…> with your own values. uvx runs the command named after the package; if the README names another one, use uvx --from vouch-kb <command>

## When to use it
- prevent unreviewed model edits in project documentation
- verify content-hashed source citations before updating docs
- compile structured Markdown wiki pages from approved YAML claims
- keep knowledge base changes tracked inside Git commits

## Example prompts
- Check pending claims in `.vouch/` and show what needs review
- Run `vouch compile` to assemble the deployment guide from approved notes
- Draft a new YAML claim about our caching policy for human sign-off

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