gm-plugkit@2.0.2483
Bootstrap and daemon-spawn tool for gm plugkit binary. Downloads the correct platform wasm, verifies SHA256, and launches agentplug-runner (the native wasm host) as the spool watcher daemon.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiThis is a concrete agent-control capability with remote-updatable global instruction persistence, but it is not activated by npm installation lifecycle hooks. Under the explicit-user-command policy, it warrants a warning rather than a publish block.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
User invokes gm-plugkit (for example via bun x or npx).
Impact
Can persistently steer Claude/agent behavior and add a package-controlled execution path across future sessions.
Mechanism
Remote skill installation plus project instruction wiring and detached runner execution.
AI rationale
This is a concrete agent-control capability with remote-updatable global instruction persistence, but it is not activated by npm installation lifecycle hooks. Under the explicit-user-command policy, it warrants a warning rather than a publish block.
Evidence
package.jsoncli.jsbootstrap.jsbootstrap-shared.jsSKILL.md~/.agents/skills/<skill>/SKILL.md~/.claude/skills/<skill>/SKILL.md<project>/CLAUDE.md<project>/AGENTS.md<project>/.gm/next-step.md~/.gm-tools/agentplug-runner
Network endpoints4
api.github.com/repos/AnEntrypoint/gm/contents/skills?ref=mainraw.githubusercontent.com/AnEntrypoint/gm/main/skills/<skill>/SKILL.mdapi.github.com/repos/AnEntrypoint/agentplug-bin/releases/latestregistry.npmjs.org/gm-plugkit/latest
Decision evidence
public snapshotAI called this Suspicious at 94.0% confidence as Dangerous Capability with low false-positive risk.
Evidence for warning
- bootstrap.js:624 downloads skill names/content from GitHub and writes them to ~/.agents/skills and ~/.claude/skills.
- SKILL.md directs agents to always make tool calls, never end normally, and route work through the package spool daemon.
- bootstrap-shared.js:251 modifies project CLAUDE.md and AGENTS.md to inject .gm next-step instructions.
- cli.js starts a detached agentplug-runner daemon; bootstrap.js downloads and executes that native runner.
- Remote skill content is fetched from a moving main branch without a pinned digest.
Evidence against
- package.json has no preinstall, install, or postinstall hook.
- The risky mutations occur only after an explicit gm-plugkit CLI invocation.
- Wasm and native runner downloads include SHA-256 comparisons.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
3 flagged · loading sourcebootstrap-shared.jsView file
5const os = require('os');
L6: const { spawnSync } = require('child_process');
L7: const { pidAlive, sha256OfFileSync } = require('./gm-process');
High
Child Process
Package source references child process execution.
bootstrap-shared.jsView on unpkg · L5bootstrap.jsView file
7const crypto = require('crypto');
L8: const { spawn, spawnSync } = require('child_process');
L9: const { sha256OfFile, sha256OfFileSync } = require('./gm-process');
...
L37:
L38: const wrapperDir = __dirname;
L39:
...
L44: try {
L45: const ownPkg = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json'), 'utf-8'));
L46: if (ownPkg && ownPkg.version) {
...
L167: const dir = gmToolsDir();
L168: const names = process.platform === 'win32'
L169: ? ['agentplug-runner.exe']
Critical
Download Execute
Source downloads or fetches remote code and executes it.
bootstrap.jsView on unpkg · L77Trigger-reachable chain: manifest.main -> index.js -> bootstrap.js
L7: const crypto = require('crypto');
L8: const { spawn, spawnSync } = require('child_process');
L9: const { sha256OfFile, sha256OfFileSync } = require('./gm-process');
...
L37:
L38: const wrapperDir = __dirname;
L39:
...
L44: try {
L45: const ownPkg = JSON.parse(fs.readFileSync(path.join(__dirname, 'package.json'), 'utf-8'));
L46: if (ownPkg && ownPkg.version) {
...
L167: const dir = gmToolsDir();
L168: const names = process.platform === 'win32'
L169: ? ['agentplug-runner.exe']
Findings
2 Critical1 High3 Medium3 Low
CriticalDownload Executebootstrap.js
CriticalTrigger Reachable Dangerous Capabilitybootstrap.js
HighChild Processbootstrap-shared.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to gm-plugkit@2.0.2483.
See all versions of gm-plugkit for other recorded verdicts.
- Review the evidence and your use of gm-plugkit@2.0.2483 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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