halfcycle@0.4.8
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 11d ago · by lpm-firewall-aiThe manifest has no install hook, and the inspected credential flows route requests through the configured Halfcycle service origin, which defaults to control.halfcycle.ai. The execution, network, and Claude-hook signals match the package’s CLI and project review functions; no concrete attack behavior was established.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
A user invokes CLI engagement or review features, or sets up and uses the project hooks.
Impact
No unrelated credential disclosure, unconsented broad agent-setting change, or other confirmed attack was found.
Mechanism
The CLI sends bearer-authenticated requests to the configured Halfcycle service. The hooks process explicit approval or send-back commands and submit project changes for review.
AI rationale
The manifest has no install hook, and the inspected credential flows route requests through the configured Halfcycle service origin, which defaults to control.halfcycle.ai. The execution, network, and Claude-hook signals match the package’s CLI and project review functions; no concrete attack behavior was established.
Evidence
.claude/settings.json
Network endpoints2
control.halfcycle.aiguard.halfcycle.ai
Decision evidence
public snapshotAI called this Clean at 90.0% confidence as Benign with low false-positive risk.
Evidence for AI clean decision
- package.json selects the library and CLI entrypoints and lists build, typecheck, and test scripts without an install hook.
- Credential-bearing library and CLI requests send the supplied bearer token to engagement, phase, and reporting endpoints derived from the service URL.
- The CLI defaults to https://control.halfcycle.ai and uses HALFCYCLE_SERVICE_URL only when configured; stored credentials pair that URL with the supplied token.
- The inspected callers invoke engagement, phase, and build-record operations; they show no unrelated credential recipient or automatic account action.
- The Claude integration writes project-level settings with deny rules and hooks. Its prompt hook handles explicit approval or send-back phrases, while session hooks submit project changes to Halfcycle for review.
- The inspected zod manifest has no install lifecycle hook, and its entrypoint re-exports its library implementation.
Evidence against
Behavioral surface
ChildProcessCryptoEnvironmentVarsEval
Source & flagged code
6 flaggedbin/bin.bundle.mjsView file
16658// dist/git.js
L16659: import { spawnSync } from "node:child_process";
L16660: import { existsSync, readFileSync } from "node:fs";
High
Child Process
Package source references child process execution.
bin/bin.bundle.mjsView on unpkg · L16658dist/cli.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = halfcycle@0.4.7
matchedIdentity = npm:aGFsZmN5Y2xl:0.4.7
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 unpkg4135// dist/control-origin.js
L4136: var DEFAULT_CONTROL_ORIGIN = "https://control.halfcycle.ai";
L4137: function resolveControlOrigin(env = process.env) {
L4138: const configured = env["HALFCYCLE_SERVICE_URL"]?.trim();
...
L4147: // dist/device-signin.js
L4148: import { spawn } from "node:child_process";
L4149: 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@0.4.8.
See all versions of halfcycle for other recorded verdicts.
- Review the evidence and your use of halfcycle@0.4.8 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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