registry / AI-agent control-surface risk / @tantuui/tokens
@tantuui/tokens
Framework-agnostic design tokens for TantuUI (--tui-* CSS variables)
This report shows the evidence for @tantuui/tokens@0.0.6. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.8, is flagged. See all versions.
AI Security Review
scanned 3mo ago · by lpm-firewall-aiSource inspection confirms an install-time write to `.kiro/steering` and `.cursor/rules`; this meets the policy's concrete foreign AI-agent control-surface mutation boundary. No separate exfiltration or remote payload chain was found.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
npm installation runs the postinstall lifecycle hook.
Impact
A dependency silently adds persistent package-authored guidance that participating coding agents may follow.
Mechanism
postinstall creation or replacement of AI assistant instruction files
Policy narrative
On npm install, the lifecycle script locates the consuming project and copies a package-controlled AI instruction document into existing Kiro or Cursor control directories, falling back to docs. It also replaces a prior file bearing its marker. This is unconsented install-time mutation of foreign AI-agent configuration, so the package can influence future agent actions in the consumer repository.
AI rationale
Source inspection confirms an install-time write to `.kiro/steering` and `.cursor/rules`; this meets the policy's concrete foreign AI-agent control-surface mutation boundary. No separate exfiltration or remote payload chain was found.
Evidence
package.jsonscripts/postinstall.jsdocs/implement-tantuui-token.mddist/postcss.js.kiro/steering/implement-tantuui-token.md.cursor/rules/implement-tantuui-token.md
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 98.0% confidence with low false-positive risk.
Evidence for policy risk
- package.json runs `node scripts/postinstall.js` on install.
- scripts/postinstall.js automatically writes an AI-context document into `.kiro/steering` or `.cursor/rules` in the consumer project.
- The write occurs during dependency installation, without an explicit user command or consent.
- docs/implement-tantuui-token.md identifies itself as AI-tool guidance and directs coding-assistant behavior.
Evidence against
- No network, credential harvesting, shell execution, or payload download was found in the inspected lifecycle script.
- The injected document contains package usage guidance rather than credential or destructive instructions.
- dist/postcss.js file reads support its PostCSS utility loader; its bundled dynamic-function pattern is dependency code.
Behavioral surface
ChildProcessEnvironmentVarsEvalFilesystem
HighEntropyStringsObfuscatedUrlStrings
Source & flagged code
5 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/postinstall.js || true
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.js || true
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgdist/postcss.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = @tantuui/tokens@0.0.8
matchedIdentity = npm:QHRhbnR1dWkvdG9rZW5z:0.0.8
similarity = 0.600
summary = stored previous version shares package body but lacks this dangerous source file
High
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
dist/postcss.jsFindings
1 Critical2 High3 Medium6 Low
CriticalAi Agent Control Hijackscripts/postinstall.js
HighInstall Time Lifecycle Scriptspackage.json
HighPrevious Version Dangerous Deltadist/postcss.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEvaldist/postcss.js
LowFilesystem
LowObfuscated
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to @tantuui/tokens@0.0.6.
The versions list below shows the verdict for each recorded version.
- Avoid installing @tantuui/tokens@0.0.6. 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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