# Stemem Identity Runtime (npm · stemem)

Local-first agent persona runtime (MCP): cross-session personality that survives compaction.

- Trust score: 78/100 (medium)
- Change this week: −3
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `stemem`: 78/100 (this document), [markdown](https://verifymcp.io/servers/jojo-adam-stemem/stemem.md), [page](https://verifymcp.io/servers/jojo-adam-stemem/stemem)

## Channel facts

- Registry: `npm`
- Package: `stemem`
- Version: `0.1.0`
- 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 2026-11-05.

- **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.
  - No production dependencies, so there is no dependency health to assess.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (MIT).
  - Actively maintained (last published 36 days ago).
  - Security-disclosure policy not yet verified: we couldn't inspect the source repository.
- **Schema Quality & AI Usability**: 63/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 541 tokens (~60/item across 9 items; 9 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 80/100
  - Stability observed for 24 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 87/100
  - 89% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 85% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 9 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 9 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the Stemem Identity Runtime MCP server?

Stemem Identity Runtime runs locally as an npm package, launched with npx -y stemem. 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 jojo-adam-stemem -- npx -y stemem
```

### Cursor

```json
{
  "mcpServers": {
    "jojo-adam-stemem": {
      "command": "npx",
      "args": [
        "-y",
        "stemem"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "jojo-adam-stemem": {
      "command": "npx",
      "args": [
        "-y",
        "stemem"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add jojo-adam-stemem -- npx -y stemem
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add jojo-adam-stemem --command npx --arg -y --arg stemem
```

### Hermes

```yaml
mcp_servers:
  jojo-adam-stemem:
    command: "npx"
    args: ["-y", "stemem"]
```

### Netclaw

```json
{
  "McpServers": {
    "jojo-adam-stemem": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "stemem"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add jojo-adam-stemem -t stdio -c npx -a -y stemem
```

### Other

```json
{
  "mcpServers": {
    "jojo-adam-stemem": {
      "command": "npx",
      "args": [
        "-y",
        "stemem"
      ]
    }
  }
}
```

## 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.

### 2026-11-05 (score 78, −3)

- [functional regression] Security disclosure: fail → unverified
- [functional] Stability: pass → 0.80

### 2026-11-01 (score 81, 0)

- [functional regression] Security disclosure: unverified → fail

### 2026-10-31 (score 81, 0)

- [functional regression] Security disclosure: fail → unverified

### 2026-10-30 (score 81, 0)

- [security] Stability: 0.97 → pass

### 2026-10-29 (score 81, +1)

No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-27 (score 80, +1)

No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-25 (score 79, +1)

No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-10-22 (score 78, +1)

No change was recorded against any check on this day. Stability & Change Management went from 70 to 73. That category is still filling its 30-day observation window: 21 days of observed history at the previous scan, 22 at this one. The score rises as the window fills, whether or not the server changes.

## MCP tools (9)

### `init` (~70 tokens)

初始化一个人格态（首次装配人格时调用一次）。可传 OCEAN 预设；不传则随机 baseline。

Input parameters:

- `ocean` (object): OCEAN 五维预设 {openness,conscientiousness,extraversion,agreeableness,neuroticism}

### `event` (~135 tokens)

喂入一个记忆事件，驱动人格/情绪演化。当本轮交互人格相关时调用。返回演化后 snapshot + voiceHint/logicHint。

Input parameters:

- `drive_deltas` (object): 驱力增量 JSON，如 {"belonging":0.2}
- `importance` (string): 事件重要性；high 触发反刍、延长相关情绪衰减（对应'记一会儿'）
- `tags` (array): 情绪/驱力标签，如 betrayal,conflict,joy
- `text` (string): 事件文本

### `tick` (~51 tokens)

时间流逝心跳：驱力自然紧迫 + 漂移衰减。空闲/心跳时调用。

Input parameters:

- `seconds` (number): 推进秒数，默认 3600

### `satisfy` (~43 tokens)

满足某驱力（闭环）。

Input parameters:

- `amount` (number): 满足量 0–1，默认 0.3
- `drive` (string)

### `snapshot` (~51 tokens)

读取紧凑身份态（OCEAN+主导情绪+驱力）+ 可注入 prompt 片段。每轮重注入宿主 prompt 抗压缩失忆。

### `autostep` (~49 tokens)

自主行为推进：按驱力自己决定并做想做的事（玩家不干预也活）。

Input parameters:

- `seconds` (number): 推进秒数，默认 3600

### `intervene` (~72 tokens)

人工干预：顺驱力（帮他做想做的）或逆驱力（对抗意愿去塑造他）。

Input parameters:

- `amount` (number): 干预量，默认 0.4
- `drive` (string)
- `text` (string): 干预描述

### `status` (~17 tokens)

完整状态检视（调试用）。

### `generate_soul` (~53 tokens)

导出 SoulSpec v0.4 包（soul.json + SOUL.md + IDENTITY.md），进 ClawSouls 分发。

Input parameters:

- `target_dir` (string): 输出目录，默认当前目录

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/jojo-adam-stemem/stemem#diagnostics

## Score history

- 2026-11-05: 78
- 2026-11-04: 81
- 2026-11-03: 81
- 2026-11-02: 81
- 2026-11-01: 81
- 2026-10-31: 81
- 2026-10-30: 81
- 2026-10-29: 81
- 2026-10-28: 80
- 2026-10-27: 80
- 2026-10-26: 79
- 2026-10-25: 79
- 2026-10-24: 78
- 2026-10-23: 78
- 2026-10-22: 78
- 2026-10-21: 77
- 2026-10-20: 77
- 2026-10-19: 76
- 2026-10-18: 76
- 2026-10-17: 75
- 2026-10-16: 75
- 2026-10-15: 74
- 2026-10-14: 74
- 2026-10-13: 73
- 2026-10-12: 67
- 2026-10-11: 67
- 2026-10-05: 67
- 2026-10-04: 67
- 2026-10-03: 67
- 2026-10-02: 67

## Common questions

### What is the Stemem Identity Runtime MCP server?

Stemem Identity Runtime is an MCP server listed in the public MCP registry as io.github.JOJO-Adam/stemem. Local-first agent persona runtime (MCP): cross-session personality that survives compaction. This page covers its npm package (stemem).

### Is the Stemem Identity Runtime MCP server safe to use?

Stemem Identity Runtime scores 78 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. 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 Stemem Identity Runtime MCP server expose?

Stemem Identity Runtime exposes 9 tools: init, event, tick, satisfy, snapshot, and 4 more. Their descriptions and schemas cost roughly 541 tokens of context every time the server is loaded.

### Is the Stemem Identity Runtime MCP server still maintained?

Stemem Identity Runtime is still listed as active in the MCP registry. We last reached this channel on 5 November 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 Stemem Identity Runtime MCP server under?

Stemem Identity Runtime 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/stemem
- Socket report: https://socket.dev/npm/package/stemem
- Repository: https://github.com/JOJO-Adam/Stemem
- Changelog RSS feed: https://verifymcp.io/servers/jojo-adam-stemem/stemem.xml
- Changelog JSON feed: https://verifymcp.io/servers/jojo-adam-stemem/stemem.json
- HTML version of this page: https://verifymcp.io/servers/jojo-adam-stemem/stemem