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Security audit

grounded

Security checks for vulnerabilities and agentic risk

Overview

This Markdown-only skill gives agents instructions for checking repository references with a disclosed CLI and does not show hidden execution, exfiltration, or unsafe persistence.

Install only if you want agents to use the grounded tool for repository reference checks. Be aware that full-repository scans read project files, and running grounded fix without --dry-run can edit code, but these behaviors are disclosed and tied to the skill's purpose.

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 (2)

Skill Enumeration

Medium
Category
Agent Snooping
Content
* `impact` never writes. `mcp` and `lsp` never write.
* Machine output: `--format json` (scripts), `--format sarif` (code
  scanning). Terminal output is for humans; parse JSON instead.
* `init-agent --skill` installs this skill to `~/.claude/skills/grounded`
  (all projects); `--skill-project` installs to `.claude/skills/grounded`
  (this repo only). Bare `init-agent` never writes outside the repo.
Confidence
85% confidence
Finding
Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Skill Enumeration

Medium
Category
Agent Snooping
Content
* Machine output: `--format json` (scripts), `--format sarif` (code
  scanning). Terminal output is for humans; parse JSON instead.
* `init-agent --skill` installs this skill to `~/.claude/skills/grounded`
  (all projects); `--skill-project` installs to `.claude/skills/grounded`
  (this repo only). Bare `init-agent` never writes outside the repo.
Confidence
85% confidence
Finding
Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.

Static analysis

No suspicious patterns detected.