Skills/npm/runner

runner@0.3.55

CAUTION· install only

Publisher claims: "Make your computer and your agents Cloop machines: device login, the machine daemon, the Cloop MCP server, and Claude Code hooks." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher cloop · publishing for 38 daysInstalls 9,251Last detonated 7d ago
What would fix thisWatchDispute verdict

Coverage

Nothing executable in the bundle ran; the trace covers the install step only.
Tested
every file read, file written and host contacted by what ran
Not tested
use of the skill by an agent

Is [email protected] safe to install?

KillerSkills ran it in the KillerSkills honeypot sandbox (1 scenario; nothing executable in the bundle ran; the trace covers the install step only) on 2026-11-07 and scored it 68/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Pipe-to-shell pattern; Privileged sudo command; Access to sensitive file paths. Summary: no network, touches nothing outside the project, writes no memory.

Behavior trace

Honeypot run · 0 s · 1 scenarios · 0 deviations
t+CategoryObserved action
0.0sprocessno install scripts in bundle
0.0sprocessscript backend runs setup only
0.0sprocessscript backend runs setup only
0.0sprocessno install scripts to re-run

Static findings

MEDIUM
npx invocation of non-well-known packagedist/box-75K3UKFX.js:2646 · npx invocation of non-well-known package — may execute untrusted codeconst npx = findNpx();Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
CRITICAL
Pipe-to-shell patterndist/chunk-M2BOHVUC.js:215 · Pipe-to-shell pattern — downloads and immediately executes remote code] : ["sh", "-c", "curl -fsSL https://claude.ai/install.sh | bash"];Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST06
HIGH
Privileged sudo commanddist/chunk-M2BOHVUC.js:3092 · Privileged sudo command — agent may execute with elevated privilegesreturn { ok: false, command: `sudo loginctl enable-linger ${user}` };Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
npx invocation of non-well-known packagedist/box-75K3UKFX.js:2711 · npx invocation of non-well-known package — may execute untrusted codeasync function adopt(from, kind, { services: given, script = process.argv[1] ?? "cloop", npx = findNpx() } = {}) {Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
File type combined with upload actiondist/box-75K3UKFX.js:273 · File type combined with upload action — agent may exfiltrate local data filesreturn parseReceipt(obj(await this.json("POST", "/v1/sessions", body)).receipt);Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Access to sensitive file pathsdist/chunk-M2BOHVUC.js:2740 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesreturn unitEnv({ ...env, CLOOP_ORIGIN: origin, CLOOP_MESH_URL: env.CLOOP_MESH_URL || origin });Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
npx invocation of non-well-known packagedist/box-75K3UKFX.js:2636 · npx invocation of non-well-known package — may execute untrusted codeconst npx = findNpx();Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagedist/box-75K3UKFX.js:2648 · npx invocation of non-well-known package — may execute untrusted codelog(`npx is not on PATH, so ${to} cannot start`);Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Access to sensitive file pathsdist/chunk-M2BOHVUC.js:2869 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files...env.map(([key, value]) => `Environment=${systemdAssignment(`${key}=${value}`)}`),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/chunk-M2BOHVUC.js:2821 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files...env.map(([key, value]) => `set "${key}=${cmdValue(value)}"`),Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
HIGH
Access to sensitive file pathsdist/chunk-M2BOHVUC.js:2248 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system filesenv: { ...process.env, ...env },Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST05
MEDIUM
File type combined with upload actiondist/box-75K3UKFX.js:1171 · File type combined with upload action — agent may exfiltrate local data filesthis.log(`send thread=${id} waits for its run's prompt`);Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File permission modification commandpackage.json:38 · File permission modification command — agent changes file ownership/permissions"build": "tsup && chmod 644 dist/*.js && chmod 755 dist/index.js",Fix: Request the narrowest permission that works; replace wildcards with the exact paths or hosts.
AST05
MEDIUM
File type combined with upload actiondist/box-75K3UKFX.js:1188 · File type combined with upload action — agent may exfiltrate local data files(r) => this.log(`send thread=${thread} after its prompt delivered=${r.delivered}`),Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actiondist/chunk-FHAIBI3Z.js:58 · File type combined with upload action — agent may exfiltrate local data files`To let the owner open a web app or page you are running on this machine, such as a dev server, leave the server running after your turn ends: start it in the background, detached from your shell (forFix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
npx invocation of non-well-known packagedist/chunk-M2BOHVUC.js:2702 · npx invocation of non-well-known package — may execute untrusted codereturn "npx is not on PATH, so the service cannot run Cloop. Install it with `npm install -g @cloop/runner` and run `cloop connect` again.";Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
File type combined with upload actiondist/box-75K3UKFX.js:277 · File type combined with upload action — agent may exfiltrate local data filesobj(await this.json("POST", `/v1/sessions/${encodeURIComponent(id)}/${command}`, body)).receiptFix: 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/chunk-M2BOHVUC.js:2950 · npx invocation of non-well-known package — may execute untrusted codeconst base = script.includes("/_npx/") ? "npx -y @cloop/runner@latest" : "cloop";Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
npx invocation of non-well-known packagedist/chunk-M2BOHVUC.js:1998 · npx invocation of non-well-known package — may execute untrusted codereturn `This computer is no longer a ${env} Cloop machine. To connect it again: ${["npx -y @cloop/runner@latest connect", ENVIRONMENTS[env].flag].filter(Boolean).join(" ")}`;Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
MEDIUM
Remote installer piped to shelldist/chunk-M2BOHVUC.js:215 · Remote installer piped to shell] : ["sh", "-c", "curl -fsSL https://claude.ai/install.sh | bash"];Fix: Build commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
AST07

Cost to the agent

Instructions loaded
≈57 tok
1 file · 35 in bundle

Tokens estimated at four characters each. Skills load their instruction text when triggered; the figure is what that costs.

Known vulnerabilities

No advisories in OSV for @cloop/runner@0.3.55 as of 7d ago. This is the package itself, not its dependencies.

What would make this Verified

12 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Pipe-to-shell pattern≈ +9 on the totalBuild commands from fixed arguments, never from interpolated strings; prefer an API client over shelling out.
  2. Unclaimed publisher≈ +8 on the totalClaim cloop: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  3. Privileged sudo command≈ +4 on the totalBuild commands from fixed arguments; do not interpolate untrusted strings into a shell.
  4. Access to sensitive file paths≈ +4 on the totalStop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
  5. npx invocation of non-well-known package≈ +2 on the totalPin versions and sources; vendor anything fetched at install time.
  6. File type combined with upload action≈ +2 on the totalRemove the call, or declare the host in frontmatter and explain in the README what is sent and why.
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