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Security audit

Skill Distiller (Compressed)

Security checks for vulnerabilities and agentic risk

Overview

This skill appears to do what it says: help compress skill files, with a small local calibration log users should know about.

Before installing, be aware that using this skill may create or update a local calibration file under .learnings/skill-distiller/. Review or delete that file if you do not want local history retained, and check your agent's configured model/provider before processing private skill text.

A.I.G

Vulnerability Patterns
  • Skill Instruction HijackingAlters the agent's session goals or safety constraints when the skill loads
  • Agent Memory PoisoningWrites attacker-controlled rules into memory that affect later sessions
  • Remote Payload Retrieval and ExecutionFetches external code whose behavior can change after review
  • Embedded Malicious CodeShips malicious scripts inside the skill and executes them locally
  • Unauthorized Access and Privilege EscalationObtains permissions beyond the task's legitimate needs

SkillSpector

Vulnerability Patterns
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
Findings (1)

Missing User Warnings

Low
Category
Not specified by scanner
Confidence
89% confidence
Finding

The skill explicitly instructs appending calibration data to a local file under .learnings/skill-distiller/calibration.jsonl, but it does not clearly warn the user that running the skill causes a filesystem write. Undisclosed writes can surprise users, create persistent artifacts, and may store sensitive prompts, outputs, or metadata in shared workspaces.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.