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Security audit

Quest Chain Decomposer

Security checks for vulnerabilities and agentic risk

Overview

This productivity skill turns goals into step-by-step plans and shows no evidence of hidden access, persistence, network use, or data exfiltration.

This skill appears safe to install for personal planning use. Be aware that it may activate for a wide range of planning or procrastination-related requests, and it does not explicitly document tool permissions even though the artifact does not use external tools.

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
Vulnerability Patterns
  • System Prompt LeakageDirect Leakage, Indirect Extraction, Tool-Based Exfiltration
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • MCP Least PrivilegeUnderdeclared Capability, Wildcard Permission, Missing Permission Declaration
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
Findings (6)

Direct Prompt Extraction

High
Category
System Prompt Leakage
Confidence
85% confidence
Finding

Skill contains instructions that could directly expose system prompts, internal rules, or hidden instructions to users or external parties.

Content

Scanner excerpt · handler.py (reported line 164)May include surrounding context.

python
def _load_prompt_template(skill_name):
    return PROMPT_TEMPLATE


def _clean_text(value: Any) -> str:

Undeclared Tool Scope

Medium
Category
MCP Least Privilege
Confidence
70% confidence
Finding

Without declared permissions the skill's intent is opaque and cannot be validated.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
82% confidence
Finding

This markdown file contains substantial instructional content in both English and Chinese, including a full scenario that assumes Chinese-language interaction. Under the policy rule, forcing or assuming a specific language without explicit user opt-in can be a natural-language policy concern, and no language-selection guidance or justification is provided here.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
85% confidence
Finding

The description says to use the skill when the user "cannot see the first move," is "stalling mid-project," or needs a task map for study, home, admin, or personal projects. These conditions are quite broad and could match many ordinary productivity conversations without clearly defining boundaries for when this skill should or should not activate.

Content

No source excerpt is available for this finding.

Natural-Language Policy Violations

Low
Category
Not specified by scanner
Confidence
77% confidence
Finding

The file introduces a Chinese name and later includes a full Chinese usage scenario, but it does not explain whether output language follows user preference or whether multilingual behavior is optional. This can create ambiguity around language handling and may conflict with policies requiring user language choice rather than implicit switching.

Content

No source excerpt is available for this finding.

Vague Triggers

Low
Category
Not specified by scanner
Confidence
80% confidence
Finding

The usage criteria include generic situations such as wanting to break a goal into a sequence or start today instead of circling the task. While understandable, the file does not provide explicit non-trigger cases or tighter scope limits, which increases the chance of unintended invocation for routine planning requests.

Content

No source excerpt is available for this finding.

Static analysis

No suspicious patterns detected.