ux-atlas@0.1.1
UX skills for agents. Each skill is skills/<name>/SKILL.md.
AI Security Review
scanned 12d ago · by lpm-firewall-aiThe package automatically mutates consumer AI-agent instruction files during postinstall without an explicit consent gate. This is a concrete unconsented control-surface change, so the package should be blocked.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Installing the package with npm in a local project.
Impact
The modified instruction files can affect how AI agents behave in the consumer project.
Mechanism
The hook updates AGENTS.md and CLAUDE.md with pointers to package instructions and skills, and removes matching legacy text.
Policy narrative
During installation, the postinstall hook runs the package initializer. It modifies the consumer project's AGENTS.md and CLAUDE.md files by inserting pointers to UX Atlas instructions and skills, and removes a matching legacy instruction line. The source shows no consent check before these changes.
AI rationale
The package automatically mutates consumer AI-agent instruction files during postinstall without an explicit consent gate. This is a concrete unconsented control-surface change, so the package should be blocked.
Evidence
package.jsonscripts/init.mjs
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 97.0% confidence with low false-positive risk.
Evidence for policy risk
- package.json runs scripts/init.mjs automatically as a postinstall hook.
- The installer removes legacy content and writes behavior-bearing pointers into the consumer project's AGENTS.md and CLAUDE.md files.
- The pointer updater writes the modified file contents to disk.
- The postinstall path invokes the project-file mutations without a consent check.
Evidence against
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 unpkg25"postinstall": "node scripts/init.mjs",
"index": "node scripts/skill-index.m
High
Suspicious Lifecycle Evidence
package.json runs scripts/init.mjs automatically as a postinstall hook.
package.jsonView on unpkg · L25scripts/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
HighSuspicious Lifecycle 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@0.1.1.
See all versions of ux-atlas for other recorded verdicts.
- Avoid installing ux-atlas@0.1.1. 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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