halfcycle@0.4.10
Your coding agents are the engineers. Halfcycle is the rest of the team: product owner, architect, planner and independent reviewer for Claude Code.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe package’s metadata and entry points match its stated Halfcycle CLI and library purpose. The reviewed credential-bearing requests target the Halfcycle service and occur as part of CLI operations, with no install hook or unrelated credential transfer found.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
A user runs the halfcycle CLI or explicitly calls a library operation.
Impact
Expected service operations can transmit engagement data supplied by the user to Halfcycle. No unrelated credential recipient or unsolicited account action was found.
Mechanism
The CLI uses a Halfcycle engagement credential for requests to the engagement service; the installer uses the configured Halfcycle control service.
AI rationale
The package’s metadata and entry points match its stated Halfcycle CLI and library purpose. The reviewed credential-bearing requests target the Halfcycle service and occur as part of CLI operations, with no install hook or unrelated credential transfer found.
Network endpoints2
control.halfcycle.aicredential.serviceUrl
Decision evidence
public snapshotAI called this Clean at 86.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- The package exposes a Halfcycle CLI and has no install, preinstall, or postinstall lifecycle hook.
- The CLI starts when the user runs its executable; package installation does not invoke it.
- The CLI sends phase and system-description requests with a Halfcycle token to the credential’s service URL.
- The installer defaults to Halfcycle’s stated control service, https://control.halfcycle.ai.
- The package describes its purpose as supporting Claude Code engineering workflows.
Evidence against
- The flagged network and credential behavior is tied to Halfcycle service operations, not an unrelated collector.
- The package metadata identifies a CLI and library, and its runtime dependency is zod.
- No hidden automatic credential collection or unrelated execution behavior was identified in the reviewed paths.
Behavioral surface
ChildProcessCryptoEnvironmentVarsEvalFilesystemNetwork
Source & flagged code
6 flaggedbin/bin.bundle.mjsView file
17608// dist/git.js
L17609: import { spawnSync } from "node:child_process";
L17610: import { existsSync, readFileSync } from "node:fs";
High
Child Process
Package source references child process execution.
bin/bin.bundle.mjsView on unpkg · L17608dist/cli.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = halfcycle@0.4.8
matchedIdentity = npm:aGFsZmN5Y2xl:0.4.8
similarity = 0.600
summary = stored previous version shares package body but lacks this dangerous source file
Critical
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
dist/cli.jsView on unpkg5326// dist/control-origin.js
L5327: var DEFAULT_CONTROL_ORIGIN = "https://control.halfcycle.ai";
L5328: function resolveControlOrigin(env = process.env) {
L5329: const configured = env["HALFCYCLE_SERVICE_URL"]?.trim();
...
L5338: // dist/device-signin.js
L5339: import { spawn } from "node:child_process";
L5340: import { platform as platform3 } from "node:os";
Findings
1 Critical5 High3 Medium5 Low
CriticalPrevious Version Dangerous Deltadist/cli.js
HighChild Processbin/bin.bundle.mjs
HighSame File Env Network Executiondist/cli.js
HighSandbox Evasion Gated Capabilitydist/cli.js
HighCross File Remote Execution Contextdist/cli.js
HighRuntime Package Installdist/cli.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEval
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to halfcycle@0.4.10.
See all versions of halfcycle for other recorded verdicts.
- Review the evidence and your use of halfcycle@0.4.10 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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