registry / @companion-ai/feynman / 0.5.43
@companion-ai/feynman@0.5.43
The open source AI research agent.
AI Security Review
scanned 22d ago · by lpm-firewall-aiInspected source shows a version-only preinstall check, user-invoked project scaffolding, and disclosed package-aligned telemetry. These behaviors do not establish a concrete attack surface.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Running the CLI starts telemetry; running the explicit /init command creates project scaffolding.
Impact
No confirmed malicious impact was established; telemetry may disclose command and error details as described in the package notice.
Mechanism
The preinstall hook checks the Node version. The /init handler preserves an existing AGENTS.md, while telemetry sends usage and error information to the configured PostHog host.
AI rationale
Inspected source shows a version-only preinstall check, user-invoked project scaffolding, and disclosed package-aligned telemetry. These behaviors do not establish a concrete attack surface.
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 that script exits only when the version is unsupported.
- The executable loads the built CLI when the user runs it.
- The project init command creates an AGENTS.md only when none exists; it is registered as an explicit command.
- The CLI initializes usage telemetry and shows a notice describing collected data, including error messages and stack traces.
- Telemetry defaults to the package's PostHog endpoint and supports an environment-variable opt-out.
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 Deltadist/cli.js
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@0.5.43.
See all versions of @companion-ai/feynman for other recorded verdicts.
- Review the evidence and your use of @companion-ai/feynman@0.5.43 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: .
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