# RuleDrift (npm · rule-drift)

Test whether AI agents retain critical instructions as conversations grow.

- Trust score: 97/100 (high trust)
- Change this week: 0
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-20

## Components

- npm · `rule-drift`: 97/100 (this document), [markdown](https://verifymcp.io/servers/ri7in-rule-drift/rule-drift.md), [page](https://verifymcp.io/servers/ri7in-rule-drift/rule-drift)

## Channel facts

- Registry: `npm`
- Package: `rule-drift`
- Version: `0.1.1`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-20.

- **Supply Chain Security**: 100/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 0 of 3 dependencies flagged as unhealthy.
- **Provenance & Transparency**: 100/100
  - Source repository is publicly reachable at the declared URL.
  - Cryptographically verified build provenance (signed, bound to ri7in/rule-drift).
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 36 days ago).
  - Publishes a security disclosure policy (SECURITY.md).
- **Schema Quality & AI Usability**: 82/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 110 tokens (~55/item across 2 items; 2 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 100/100
  - No destabilizing schema changes in the last 30 days.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 2 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 3 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a current MCP spec version (2026-07-28).

## Install

### How do I install the RuleDrift MCP server?

RuleDrift runs locally as an npm package, launched with npx -y rule-drift. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add ri7in-rule-drift -- npx -y rule-drift
```

### Cursor

```json
{
  "mcpServers": {
    "ri7in-rule-drift": {
      "command": "npx",
      "args": [
        "-y",
        "rule-drift"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "ri7in-rule-drift": {
      "command": "npx",
      "args": [
        "-y",
        "rule-drift"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add ri7in-rule-drift -- npx -y rule-drift
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ri7in-rule-drift": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "rule-drift"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ri7in-rule-drift --command npx --arg -y --arg rule-drift
```

### Hermes

```yaml
mcp_servers:
  ri7in-rule-drift:
    command: "npx"
    args: ["-y", "rule-drift"]
```

### Netclaw

```json
{
  "McpServers": {
    "ri7in-rule-drift": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "rule-drift"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add ri7in-rule-drift -t stdio -c npx -a -y rule-drift
```

### Other

```json
{
  "mcpServers": {
    "ri7in-rule-drift": {
      "command": "npx",
      "args": [
        "-y",
        "rule-drift"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-20 (score 97, +1)

- [security] Stability: 0.97 → pass

### 2026-09-18 (score 96, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-16 (score 95, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-14 (score 94, −3)

- [functional] Stability: pass → 0.80

### 2026-09-13 (score 97, +1)

- [security] Stability: 0.97 → pass

### 2026-09-11 (score 96, +1)

No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-09 (score 95, +1)

No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-09-06 (score 94, +1)

No change was recorded against any check on this day. Stability & Change Management went from 73 to 77. That category is still filling its 30-day observation window: 22 days of observed history at the previous scan, 23 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (2)

### `validate_suite` (~37 tokens)

Validate RuleDrift suite

Validate a RuleDrift configuration without calling its model or command adapter.

Input parameters:

- `configPath` (string): Configuration path inside the MCP workspace root.

Output parameters:

- `configPath` (string)
- `rules` (integer)
- `scenarios` (integer)
- `suite` (string)
- `valid` (boolean)

### `run_suite` (~41 tokens)

Run RuleDrift suite

Run every configured conversation and isolated rule probe. Response bodies are omitted from the returned report.

Input parameters:

- `configPath` (string): Configuration path inside the MCP workspace root.

Output parameters:

- `configPath` (string)
- `passRate` (number|null)
- `probes` (integer)
- `probesPassed` (integer)
- `report` (object)
- `status` (string)
- `suite` (string)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/ri7in-rule-drift/rule-drift#diagnostics

## Score history

- 2026-09-20: 97
- 2026-09-19: 96
- 2026-09-18: 96
- 2026-09-17: 95
- 2026-09-16: 95
- 2026-09-15: 94
- 2026-09-14: 94
- 2026-09-13: 97
- 2026-09-12: 96
- 2026-09-11: 96
- 2026-09-10: 95
- 2026-09-09: 95
- 2026-09-08: 94
- 2026-09-07: 94
- 2026-09-06: 94
- 2026-09-05: 93
- 2026-09-04: 93
- 2026-09-03: 92
- 2026-09-02: 92
- 2026-09-01: 91
- 2026-08-31: 91
- 2026-08-30: 90
- 2026-08-29: 90
- 2026-08-28: 89
- 2026-08-27: 89
- 2026-08-26: 88
- 2026-08-25: 87
- 2026-08-24: 86
- 2026-08-23: 86
- 2026-08-22: 85

## Common questions

### What is the RuleDrift MCP server?

RuleDrift is an MCP server listed in the public MCP registry as io.github.ri7in/rule-drift. Test whether AI agents retain critical instructions as conversations grow. This page covers its npm package (rule-drift).

### Is the RuleDrift MCP server safe to use?

RuleDrift scores 97 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 20 September 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.

### What tools does the RuleDrift MCP server expose?

RuleDrift exposes 2 tools: validate_suite, run_suite. Their descriptions and schemas cost roughly 78 tokens of context every time the server is loaded.

### Is the RuleDrift MCP server still maintained?

RuleDrift is still listed as active in the MCP registry. We last reached this channel on 20 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

### What licence is the RuleDrift MCP server under?

RuleDrift declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/rule-drift
- Socket report: https://socket.dev/npm/package/rule-drift
- Repository: https://github.com/ri7in/rule-drift
- Changelog RSS feed: https://verifymcp.io/servers/ri7in-rule-drift/rule-drift.xml
- Changelog JSON feed: https://verifymcp.io/servers/ri7in-rule-drift/rule-drift.json
- HTML version of this page: https://verifymcp.io/servers/ri7in-rule-drift/rule-drift