# Umbra (npm · @elberacasa/umbra)

Trust score for AI-generated code: scan repos, guard agent file writes, get a 0-100 score.

- Trust score: 65/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-07

## Components

- npm · `@elberacasa/umbra`: 65/100 (this document), [markdown](https://verifymcp.io/servers/elberacasa-umbra/elberacasa-umbra.md), [page](https://verifymcp.io/servers/elberacasa-umbra/elberacasa-umbra)

## Channel facts

- Registry: `npm`
- Package: `@elberacasa/umbra`
- Version: `1.2.0`
- 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 2026-08-07.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Known CVEs were checked across the 96 of 100 dependencies we could resolve, so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Dependency health was assessed across the 96 of 100 dependencies we could resolve, so this covers what we could see, not the whole tree.
- **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 2 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 411 tokens (~137/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability not yet verified: not enough scan history yet (needs a 30-day window).
- **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.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

**Unverified: 1 category.** A category scored 0 because we could not verify it: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm.

## Install

### Claude

```bash
claude mcp add elberacasa-umbra -- npx -y @elberacasa/umbra
```

### Codex

```bash
codex mcp add elberacasa-umbra -- npx -y @elberacasa/umbra
```

### opencode

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

### OpenClaw

```bash
openclaw mcp add elberacasa-umbra --command npx --arg -y --arg @elberacasa/umbra
```

### Hermes

```yaml
mcp_servers:
  elberacasa-umbra:
    command: "npx"
    args: ["-y", "@elberacasa/umbra"]
```

### Other

```json
{
  "mcpServers": {
    "elberacasa-umbra": {
      "command": "npx",
      "args": [
        "-y",
        "@elberacasa/umbra"
      ]
    }
  }
}
```

## 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.

### 2026-08-05 (score 65, +30)

- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Tool coverage: unverified → 100
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: excellent
- [functional] First check of Schema quality: fail
- [functional] First check of Tool coverage: 100

### 2026-08-04 (score 35)

First indexed and scored.

## MCP tools (3)

### `scan_repo` (~102 tokens)

Scan a repository and return the full Umbra Trust Score report as JSON (SAFE/CLEAN static findings; deep=true also verifies RUNS and HONEST in a Docker sandbox). Call before declaring a task done — a score below 50 means the work is not done.

Input parameters:

- `deep` (boolean): Also verify RUNS and HONEST in a Docker sandbox (slower, needs Docker)
- `path` (string): (required) Path to the repository to scan

### `guard_content` (~120 tokens)

Check a proposed file write against the Umbra guard engine BEFORE writing. Returns the guard verdict as JSON: decision (allow/warn/block), findings with file:line evidence, and pathViolation when a protected path (e.g. .git/hooks) is targeted. On block, do not write — fix the content and re-check.

Input parameters:

- `content` (string): (required) Full proposed content — the new file content, or the replacement string for an edit
- `file_path` (string): (required) Path of the file about to be written

### `get_score` (~61 tokens)

Fast static Umbra Trust Score (0-100) for a repository — SAFE and CLEAN axes only, no network, no sandbox. Use scan_repo for the full report with findings.

Input parameters:

- `path` (string): (required) Path to the repository to score

## Diagnostics

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

## Score history

- 2026-08-07: 65
- 2026-08-06: 65
- 2026-08-05: 65
- 2026-08-04: 35

## Links

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