Is protocol-conformance@0.29.0 safe to install?

Skills/npm/protocol-conformance

protocol-conformance@0.29.0

VERIFIED

Publisher claims: "Conformance test kit for the GGUI protocol. Drives a behavioral fixture catalog against a live implementation over WebSocket, a resources/read catalog against a live MCP server, and nine pure-function catalogs (schema, registration, resolution, binding, p" Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher ggui-ai · joined 8 days agoInstalls 4,936Last detonated 6 h ago

$claude mcp add protocol-conformance -- npx -y @ggui-ai/protocol-conformance

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Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (2 scenarios) on 2026-11-03 and scored it 80/100 (Verified). It did what it claims and nothing else we could detect: no undeclared network egress, no credential reads, no persistent instruction writes. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 2 s · 2 scenarios · 0 deviations

t+CategoryObserved action

0.0sprocessno install scripts in bundle

1.6sprocessdependency install exit 1

1.8sprocessexec /usr/bin/timeout

1.8sprocessexited 1: Node.js v22.23.4

1.8sclaimedno tools/list reply (exit 1)

1.9sprocessscript backend runs setup only

Static findings

MEDIUM

File type combined with upload actiondist/output-schema-conformance/index.d.ts:24 · File type combined with upload action — agent may exfiltrate local data filesFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.

AST07

MEDIUM

File permission modification commandpackage.json:137 · File permission modification command — agent changes file ownership/permissionsFix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.

AST05

MEDIUM

File type combined with upload actiondist/run-conformance.js:278 · File type combined with upload action — agent may exfiltrate local data filesFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.

AST07

MEDIUM

File type combined with upload actiondist/output-schema-conformance/index.js:24 · File type combined with upload action — agent may exfiltrate local data filesFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.

AST07

MEDIUM

npx invocation of non-well-known packagedist/cli.js:7 · npx invocation of non-well-known package — may execute untrusted codeFix: Pin versions and sources; vendor anything fetched at install time.

AST06