registry / @companion-ai/feynman / 0.5.39
@companion-ai/feynman@0.5.39
The open source AI research agent.
AI Security Review
scanned 23d ago · by lpm-firewall-aiThe inspected lifecycle hook only checks the Node version, and the flagged project and account features have bounded, user-facing behavior. The runtime telemetry is disclosed and sent to the package's configured PostHog service; the reviewed evidence does not establish malicious behavior.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
npm install runs the preinstall version check; runtime behavior begins when the CLI or its research tools are invoked.
Impact
No harmful effect or confirmed attack surface was established.
Mechanism
The project init command creates missing project files, signed-in users can access AlphaXiv paper tools, and the CLI sends command metadata to PostHog.
AI rationale
The inspected lifecycle hook only checks the Node version, and the flagged project and account features have bounded, user-facing behavior. The runtime telemetry is disclosed and sent to the package's configured PostHog service; the reviewed evidence does not establish malicious behavior.
Evidence
package.jsonscripts/check-node-version.mjsbin/feynman.jsdist/cli.jsdist/telemetry/posthog.jsextensions/research-tools/project.tsextensions/research-tools/alpha.ts
Network endpoints1
us.i.posthog.com
Decision evidence
public snapshotAI called this Clean at 93.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The preinstall hook runs a Node version check and exits on unsupported versions.
- The launcher loads the bundled CLI as its normal entrypoint.
- The project init command creates AGENTS.md and a session log README only when they do not already exist.
- AlphaXiv account tools require a signed-in session and perform requested paper searches.
- The CLI sends disclosed usage telemetry to its configured PostHog service; the inspected code collects command metadata.
Evidence against
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsTelemetryUrlStrings
Source & flagged code
6 flaggedpackage.jsonView file
•scripts.preinstall = node ./scripts/check-node-version.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkgbin/feynman.jsView file
23if (compareNodeVersions(parseNodeVersion(process.versions.node), parseNodeVersion(MIN_NODE_VERSION)) < 0) {
L24: const isWindows = process.platform === "win32";
L25: console.error(`feynman requires Node.js ${MIN_NODE_VERSION} or newer (detected ${process.versions.node}).`);
L26: console.error(isWindows
L27: ? "Install a supported Node.js release from https://nodejs.org, or use the standalone installer:"
L28: : `Switch to a supported Node release with \`nvm install ${PREFERRED_NODE_MAJOR} && nvm use ${PREFERRED_NODE_MAJOR}\`, or use the standalone installer:`);
...
L35:
L36: // `--version` needs only package.json; answer it without loading the CLI.
L37: if (process.argv.length === 3 && (process.argv[2] === "--version" || process.argv[2] === "-v")) {
L38: const { readFileSync } = await
High
Sandbox Evasion Gated Capability
Source gates dangerous network, credential, or execution behavior behind CI, host, platform, time, or geo fingerprint checks.
bin/feynman.jsView on unpkg · L23Findings
4 High5 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighSandbox Evasion Gated Capabilitybin/feynman.js
HighSemantic Analysis Limiteddist/cli.js#virtual:normalized:round1
HighPrevious Version Dangerous Deltaextensions/research-tools/alpha.ts
MediumDynamic Requirebin/feynman.js
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperscripts/install/install-skills.sh
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowTelemetry
LowUrl Strings
Affected versions and remediation
This report applies to @companion-ai/feynman@0.5.39.
See all versions of @companion-ai/feynman for other recorded verdicts.
- Review the evidence and your use of @companion-ai/feynman@0.5.39 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.