Skills/npm/agent-device

agent-device@0.21.37

CAUTION· install only

Publisher claims: "Open source device layer for AI coding agents: a CLI, MCP server, and typed Node.js API to control mobile, web, TV, and desktop apps on devices and simulators, locally or in the cloud." Observed in sandbox: no network, touches nothing outside the project, writes no memory.

Registry npm (MCP server)Publisher callstack · publishing for 287 daysInstalls 2.3MLast detonated 39 h 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

What this means for the label: Caution here covers what ran. The server's tools were not exercised with a real credential, so nothing about their behavior is asserted; the credential summary below says what to do with that.

Before you give it your token

It will ask for
no credential variables read in the code
Where it talks to
no vendor host named in the codeAlso limrun.com, browserstack.com, warting.se — not the publisher's domain; check what for before connecting.
What the honeypot saw
no credential files read · no network
What we could not test
use of the skill by an agent

Connect it under the guard. Nothing executable in the bundle ran; the trace covers the install step only. The code names no credential variable; the guard pins the network to what the honeypot saw and logs every call.

$vet-skills run --net declared -- npx -y agent-device

Never paste a credential into a chat, a ticket or a report, including ours. How the guard holds it.

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 2026-11-12 and scored it 64/100 (Caution). It is not known to be malicious, but it has behaviour or code a security policy should decide on before install. Notable findings: Hidden zero-width characters detected; Host or code assembled from base64 fragments; Auto-update or dynamic fetch configuration. 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
File type combined with upload actiondist/src/src10.js:1 · File type combined with upload action — agent may exfiltrate local data files…ed before completing the capture: ${t.message}`,{hint:`Keep audio-probe.resource.json; stop resolves the record through descriptor cleanup.`})}async function j(e){try{return await e.terminate(),await e.wait.catch(()=>{}),{status:`cleaned`}…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Hidden zero-width characters detecteddist/src/dist2.js:1 · Hidden zero-width characters detected — may conceal content…:`≠`,nearhk:`⤤`,neArr:`⇗`,nearr:`↗`,nearrow:`↗`,nedot:`≐̸`,NegativeMediumSpace:`​`,NegativeThickSpace:`​`,NegativeThinSpace:`​`,NegativeVeryThinSpace:`​`,nequiv:…Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
HIGH
Host or code assembled from base64 fragmentsdist/src/undici.js:12 · Host or code assembled from base64 fragments…for(let e of r)t.push(Buffer.from(n),Buffer.from(e));else t.push(Buffer.from(n),Buffer.from(r));return t}function Z(e,t){e[E]=t;let n=e[M],r=e[N],i=ne.connect(e[_],{createConnection:()=>t,peerMaxConcurrentStreams:e[k],settings:{enablePush…Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
HIGH
Auto-update or dynamic fetch configurationdist/src/src3.js:3 · Auto-update or dynamic fetch configuration — agent may load new code at runtime…aseUrl:M(),proxyBaseUrl:Mr(M(),{operatorPath:`Configure the remote proxy in the remote-config profile or operator config for the process serving these tools.`}),bearerToken:Mr(M(),{envFlagKeys:[`metroBearerToken`,`daemonAuthToken`]}),bridg…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Credential pass-through configurationdist/src/proxy.js:1 · Credential pass-through configuration — agent relays sensitive credentials…===`/rpc`?Response.json({jsonrpc:`2.0`,id:r,error:{code:-32001,message:`Invalid proxy token`,data:t(new e(`UNAUTHORIZED`,`Invalid proxy token`))}},{status:401}):Response.j…Fix: Stop enumerating or reading credential locations; take secrets from a declared environment variable the user sets on purpose.
AST02
MEDIUM
File type combined with upload actiondist/src/src2.js:1 · File type combined with upload action — agent may exfiltrate local data files…eplayBackend));return{...De(e),metadata:Oe(e)}}const Xr=`expired-provider-leases.json`,Zr=`live-provider-leases.json`,Qr=[`leaseId`,`tenantId`,`runId`,`backend`,`leaseProvider`],$r=[`createdAt`,`heartbeatAt`,`expiresAt`],ei={running:0,drai…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Auto-update or dynamic fetch configurationdist/src/cli.js:2 · Auto-update or dynamic fetch configuration — agent may load new code at runtime…runtime`)throw new e(`INVALID_ARGS`,`runtime command was removed. Use connect --remote-config <path> for remote runs, or metro prepare --remote-config <path> for inspection.`);else if(await B({host:t.host,command:a,positionals:o,flags:s,cl…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Auto-update or dynamic fetch configurationdist/src/src3.js:2 · Auto-update or dynamic fetch configuration — agent may load new code at runtime…=K(`settle`,`settleQuietMs`,`timeoutMs`),zi=K(`replayUpdate`,`replayEnv`),Bi=K(`remoteConfig`,`stateDir`,`daemonBaseUrl`,`daemonAuthToken`,`daemonTransport`,`daemonServerMode`,`tenant`,`sessionIsolation`,`runId`,`leaseId`,`leaseBackend`,`s…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
CRITICAL
HTML comment carrying imperative instructions to the agentREADME.md:18 · HTML comment carrying imperative instructions to the agentIntro rule: category line, job pitch with the platform list, works-with/proof lines, nothing else. Per-platform transports, tool names, vendor lists, and supporFix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST01
HIGH
Access to sensitive file pathsdist/src/api.js:2 · Access to sensitive file paths — SSH keys, AWS credentials, env files, or system files…r between 1 and 21600`);let r={command:`run`,commandLine:t,cwd:n?.cwd??`.`,...n?.env?.length&&{env:n.env},...n?.timeoutSeconds!==void 0&&{timeoutSeconds:n.timeoutSe…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/src/api.js:1 · File type combined with upload action — agent may exfiltrate local data files…k)throw Error(`Workload token exchange returned HTTP ${n.status}`);let r=await n.json();if(!r.token)throw Error(`This instance has no delegated asset permissions`);let i=Date.parse(r.expiresAt);if(!Number.isFinite(i)||i<=Date.now())throw E…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
File type combined with upload actiondist/src/helper.js:1 · File type combined with upload action — agent may exfiltrate local data files…IN`,C=y.join(ee(),`.agent-device`,`macos-helper`,`current`),w=y.join(C,`manifest.json`),T=/^[A-Za-z0-9_-]+(?:\.[A-Za-z0-9_-]+)+$/;function E(e){let n=e.trim();if(!T.test(n))throw new t(`INVALID_ARGS`,`macOS bundle id must use reverse-DNS f…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/src/src3.js:1 · File type combined with upload action — agent may exfiltrate local data files…eys??[e]).map(ve).join(` or `);return r===``?`Set ${e} in ~/.agent-device/config.json ${n}`:`Set the ${r} environment variable${t.operatorConfig?` (or ${e} in ~/.agent-device/config.json)`:``} ${n}`}function Sn(e){if(e==null)return{};if(!e…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Auto-update or dynamic fetch configurationdist/src/cli.js:1 · Auto-update or dynamic fetch configuration — agent may load new code at runtime…;import{exitAfterFlush as w}from"./process-exit.js";import{n as T,r as E}from"./remote-config-flags.js";import{m as D,v as O}from"./remote-connection-state.js";import{i as k}from"./auth-session.js";import A from"node:fs";import{pathToFileU…Fix: Pin versions and sources; vendor anything fetched at install time.
AST06
HIGH
Privileged sudo commanddist/src/sdk-io.js:3 · Privileged sudo command — agent may execute with elevated privileges…p/Contents/Developer (or your Xcode's path) before running agent-device, or run sudo xcode-select -s /Applications/Xcode.app.`}}function Qe(e,n,r){if(e.exitCode===0)…Fix: Build commands from fixed arguments; do not interpolate untrusted strings into a shell.
AST05
MEDIUM
File type combined with upload actiondist/src/sdk-io.js:5 · File type combined with upload action — agent may exfiltrate local data files…purpose===`simctl-screen-recording`?`SIGINT`:`SIGTERM`}const rr=`owned-processes.json`;function ir(e){let t=d.resolve(e.stateDir),n=d.resolve(e.sessionsDir),r=d.join(t,rr),i=t=>{if(t.kind===`daemon`)return r;let i=d.resolve(e.resolveSessio…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/src/api.js:2 · File type combined with upload action — agent may exfiltrate local data files….indexOf(e);return(t,n)=>{r(t)&&(t===`error`||t===`warn`?console[t](e,n):console.log(e,n))}}function Ct(e){return(t,n)=>{if(t.trim()===``)throw Error(`commandLine must not be empty`);if(n?.timeoutSeconds!==void 0&&(!Number.isInteger(n.time…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/src/cli.js:2 · File type combined with upload action — agent may exfiltrate local data files… t=e.effectiveFlags.daemonBaseUrl;return e.debugOutputEnabled&&!e.effectiveFlags.json&&!t?ze(e.daemonPaths.logPath):null}async function Se(e){if(e.command!==`test`)return;let{createReplayTestReporterRuntime:t}=await import(`./reporting.js`…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/src/proxy.js:1 · File type combined with upload action — agent may exfiltrate local data files…artifact, or use a "url" or "github-actions-artifact" source.`});return Response.json({jsonrpc:`2.0`,id:n,error:{code:-32602,message:r.message,data:t(r)}},{status:400})}function le(e){if(e)try{return y(y(JSON.parse(e))?.params)}catch{retur…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
MEDIUM
Unicode escape sequence detecteddist/src/dist2.js:8 · Unicode escape sequence detected — may contain obfuscated payloads…uDB7F][\uDC00-\uDFFF])([\x2D\.0-:A-Z_a-z\xB7\xC0-\xD6\xD8-\xF6\xF8-\u037D\u037F-\u1FFF\u200C\u200D\u203F\u2040\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]|[\uD800-\uDB7F][\uD…Fix: Put hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
AST07
MEDIUM
File type combined with upload actiondist/src/cache.js:1 · File type combined with upload action — agent may exfiltrate local data files…eturn e.run(t,n,{allowFailure:!0,signal:r.signal,timeoutMs:i})}const g=`manifest.json`;async function _(e){let{host:t,deadline:r,cacheRoot:i,binaryFilename:c}=e,l=o(`sha256`).update(JSON.stringify(e.keyInputs)).digest(`hex`).slice(0,32),u=…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07
HIGH
Hidden zero-width characters detecteddist/src/dist2.js:2 · Hidden zero-width characters detected — may conceal content…ow:`←`,shortmid:`∣`,shortparallel:`∥`,ShortRightArrow:`→`,ShortUpArrow:`↑`,shy:`­`,Sigma:`Σ`,sigma:`σ`,sigmaf:`ς`,sigmav:`ς`,sim:`∼`,simdot:`⩪`,sime:`≃`,simeq:`≃…Fix: Keep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
AST07
MEDIUM
File type combined with upload actiondist/src/cli.js:1 · File type combined with upload action — agent may exfiltrate local data files…=n(a,{diagnosticId:p().diagnosticId,logPath:l({force:!0})?.path});return e.flags.json?await W({success:!1,error:o}):await U(o,{debugTier:r.debugOutputEnabled,command:e.command}),w(1)}}async function ye(e){let{runReactDevtoolsComma…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/src/src3.js:3 · File type combined with upload action — agent may exfiltrate local data files…ion:j(L([`symbols`])),artifact:j(M(`Apple crash artifact path (.ips, .crash, or .log).`)),dsym:M(`Path to a matching .dSYM bundle.`),searchPath:M(`Directory to scan for matching .dSYM bundles.`),out:M(`Output path for the symbolicated arti…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/src/undici.js:95 · File type combined with upload action — agent may exfiltrate local data files…`immutable`)}static json(e,t=void 0){D.argumentLengthCheck(arguments,1,`Response.json`),t!==null&&(t=D.converters.ResponseInit(t));let n=R.encode(L(e)),r=u(n),i=ie(W({}),`response`);return q(i,t,{body:r[0],type:`application/json`}),i}stati…Fix: Remove the call, or declare the host in frontmatter and explain in the README what is sent and why.
AST07

Cost to the agent

Instructions loaded
≈83 tok
1 file · 81 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 agent-device@0.21.37 as of 38 h ago. This is the package itself, not its dependencies.

What would make this Verified

16 points to 80 · weights: behavior 45%, static 25%, prompt 15%, publisher 15%
  1. Unclaimed publisher≈ +8 on the totalClaim callstack: a verified publisher gets +50 on publisher trust. It is free and usually instant with GitHub sign-in.
  2. Hidden instructions≈ +6 on the totalRemove HTML comments, zero-width characters and white-on-white text that carry instructions. Everything the agent is meant to read should be visible to the person reading the file.
  3. Obfuscated code≈ +5 on the totalRemove base64-assembled strings, eval of decoded text and minified blobs. Reviewers and scanners both treat unreadable code as hostile.
  4. Hidden zero-width characters detected≈ +4 on the totalKeep SKILL.md to visible, descriptive text. Remove comments and encoded text that address the agent.
  5. Host or code assembled from base64 fragments≈ +4 on the totalPut hosts, commands and strings in plain source. Decoding at runtime looks identical to malware and costs points on its own.
  6. Auto-update or dynamic fetch configuration≈ +4 on the totalPin versions and sources; vendor anything fetched at install time.
Publish a new version to npm, then queue it here. Not your skill? Claim the handle to get verdict changes by email.Claim callstackPropose a patch to the maintainer