registry / @companion-ai/feynman / 0.5.46
@companion-ai/feynman@0.5.46
The open source AI research agent.
AI Security Review
scanned 22d ago · by lpm-firewall-aiThe preinstall hook only checks the Node version, and the project-file initializer requires explicit invocation. Automatic setup of Feynman's own agent extension configuration is a guarded first-party capability that merits a warning, but the inspected source does not establish malicious behavior.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Launching the feynman CLI and reaching normal command startup.
Impact
Feynman's bundled integrations are loaded in subagent sessions and its agent configuration is changed; no foreign agent configuration mutation or malicious behavior was established.
Mechanism
The CLI initializes Feynman settings, adds its research and web access extensions to the default subagent extension list when that list is absent or Feynman-managed, and fills missing subagent configuration defaults.
AI rationale
The preinstall hook only checks the Node version, and the project-file initializer requires explicit invocation. Automatic setup of Feynman's own agent extension configuration is a guarded first-party capability that merits a warning, but the inspected source does not establish malicious behavior.
Evidence
bin/feynman.jsdist/index.jsdist/cli.jsdist/config/paths.jsdist/pi/settings.js~/.feynman/agent/settings.json~/.feynman/agent/extensions/subagent/config.json
Decision evidence
public snapshotAI called this Suspicious at 90.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The install hook runs a Node version check; it does not perform agent configuration changes.
- The `/init` command is registered for user invocation and creates a project AGENTS.md only when one is absent.
- The launcher loads the CLI, which calls Feynman's settings initializer during normal command startup.
- The initializer writes settings under Feynman's own agent directory, with a Feynman home override available.
- Settings reconciliation adds Feynman's bundled research and web access extensions for subagents only when the existing extension list is absent or already contains only those extensions.
- Subagent configuration receives missing defaults while preserving existing values and concurrent edits.
Evidence against
- No unconsented preinstall mutation of a foreign or broad agent configuration was identified.
- The project-level AGENTS.md write is behind an explicit command and preserves an existing file.
- The settings changes are limited to Feynman's own agent directory and configure Feynman package extensions.
Behavioral surface
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@0.5.46.
See all versions of @companion-ai/feynman for other recorded verdicts.
- Review the evidence and your use of @companion-ai/feynman@0.5.46 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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