Back to skill

Security audit

Phy Flag Janitor

Security checks for vulnerabilities and agentic risk

Overview

Flag Janitor is a local feature-flag auditing guide that reads code, config, .env-style files, and git history to produce cleanup recommendations without external network behavior.

Install only if you are comfortable with the agent reading local source, config files, .env-style feature-flag entries, and git history for the selected project. Review any proposed removals before applying commands, especially changes to production environment examples or flag config.

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
  • Privilege EscalationExcessive Permissions, Sudo/Root Execution, Credential Access
  • Trigger AbuseOverly Broad Trigger, Shadow Command Trigger, Keyword Baiting Trigger
  • Prompt InjectionInstruction Override, Hidden Instructions, Exfiltration Commands
  • Data ExfiltrationExternal Transmission, Env Variable Harvesting, File System Enumeration
  • Supply ChainUnpinned Dependencies, External Script Fetching, Obfuscated Code
Findings (5)

Credential Access

High
Category
Privilege Escalation
Content
### Environment-variable flags
```bash
# From .env files
grep -hE "^[A-Z_]+(_FLAG|_ENABLED|_FEATURE|_TOGGLE)=" .env* 2>/dev/null | \
  cut -d= -f1 | sort -u
Confidence
60% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Credential Access

High
Category
Privilege Escalation
Content
### Environment-variable flags
```bash
# From .env files
grep -hE "^[A-Z_]+(_FLAG|_ENABLED|_FEATURE|_TOGGLE)=" .env* 2>/dev/null | \
  cut -d= -f1 | sort -u
Confidence
60% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Credential Access

High
Category
Privilege Escalation
Content
### Environment-variable flags
```bash
# From .env files
grep -hE "^[A-Z_]+(_FLAG|_ENABLED|_FEATURE|_TOGGLE)=" .env* 2>/dev/null | \
  cut -d= -f1 | sort -u
Confidence
60% confidence
Finding
Code accesses credential files (SSH keys, AWS credentials, etc.). This could indicate credential theft attempts.

Vague Triggers

Low
Confidence
88% confidence
Finding
The manifest description lists several trigger phrases, including generic phrases like "clean up flags" and "flag cleanup," which are broad enough to match ordinary conversation about feature flags. Because the file does not provide exclusion conditions or negative examples, the activation scope may be wider than intended.

Vague Triggers

Low
Confidence
90% confidence
Finding
Several trigger phrases are short, generic descriptions of maintenance work rather than precise invocations. Without constraints on context or explicit negative examples, these phrases could unintentionally match routine discussion of flags rather than a deliberate request to run the skill.

Static analysis

No suspicious patterns detected.