ux-atlas@0.1.5
UX skills for agents. Each skill is skills/<name>/SKILL.md.
AI Security Review
scanned 6d ago · by lpm-firewall-aiThe postinstall hook makes an unconsented change to the consumer project's AI-agent control files. This supports blocking under the policy for lifecycle mutation of a foreign agent control surface.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Installing the package locally with its postinstall hook enabled.
Impact
The package can alter agent behavior for the project after installation.
Mechanism
The installer adds or updates marked sections in AGENTS.md and CLAUDE.md that direct agents to this package's instructions and skills, without an affirmative consent check.
Policy narrative
A local npm installation runs the package's postinstall script. The script modifies the consumer project's AGENTS.md and CLAUDE.md to direct agents to package-provided instructions and skills. The local-install path has no affirmative consent check, so installation alone changes the project's agent control surface.
AI rationale
The postinstall hook makes an unconsented change to the consumer project's AI-agent control files. This supports blocking under the policy for lifecycle mutation of a foreign agent control surface.
Evidence
package.jsonscripts/init.mjsAGENTS.mdCLAUDE.md
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 94.0% confidence with low false-positive risk.
Evidence for policy risk
- package.json runs scripts/init.mjs from the postinstall hook.
- The installer runs for a local package installation unless its path or global-install check causes it to skip.
- The installer writes pointer blocks into the consumer project's AGENTS.md and CLAUDE.md files.
- The inserted pointers direct agents to load this package's instructions and skills.
Evidence against
- The installer skips global installs and packages whose path is outside node_modules, but no user confirmation gates the local project-file changes.
Behavioral surface
EnvironmentVarsFilesystem
HighEntropyStrings
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/init.mjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg24"lint": "eslint .",
"postinstall": "node scripts/init.mjs",
"index": "node scripts/sk[redacted]",
"test": "node --test scripts
High
Suspicious Lifecycle Evidence
package.json runs scripts/init.mjs from the postinstall hook.
package.jsonView on unpkg · L24scripts/init.mjsView file
7const END = '<!-- /ux-atlas -->';
L8: const instructions = 'node_modules/ux-atlas/instructions/AGENTS.md';
L9: const skills = 'node_modules/ux-atlas/skills/**/SKILL.md';
...
L72: if (!next.endsWith('\n')) next += '\n';
L73: fs.writeFileSync(filePath, next);
L74: }
...
L86: if (!existing.includes(legacyBriefLine)) return;
L87: fs.writeFileSync(filePath, existing.split(legacyBriefLine).join('').replace(/^\n+/, ''));
L88: }
...
L90: export function applyPointers(projectRoot) {
L91: const agents = path.join(projectRoot, 'AGENTS.md');
L92: const claude = path.join(projectRoot, 'CLAUDE.md');
Findings
1 Critical6 High2 Medium3 Low
CriticalAi Agent Control Hijackscripts/init.mjs
HighInstall Time Lifecycle Scriptspackage.json
HighExternal Ai Agent Control Surface Mutationscripts/init.mjs
HighSuspicious Lifecycle Evidencepackage.json
HighAi Review Evidencescripts/init.mjs
HighAi Review Evidencescripts/init.mjs
HighAi Review Evidencescripts/init.mjs
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to ux-atlas@0.1.5.
See all versions of ux-atlas for other recorded verdicts.
- Avoid installing ux-atlas@0.1.5. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
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