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Security audit

Finishing A Development Branch

Security checks for vulnerabilities and agentic risk

Overview

This skill is a disclosed Git workflow helper that guides test verification, merge or PR choices, and scoped cleanup with user confirmation for destructive discard.

Install this only if you want Codex to help complete Git branches. Review its prompts carefully before choosing merge, PR, keep, or discard, especially because merge, branch deletion, and worktree cleanup can change local repository state.

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
  • Excessive AgencyUnrestricted Tool Access, Autonomous Decision Making, Scope Creep
  • 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
Findings (2)

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 219)May include surrounding context.

md
- **Problem:** Removing a worktree the harness created causes phantom state
- **Fix:** Only clean up worktrees under `.worktrees/` or `worktrees/`

**No confirmation for discard**
- **Problem:** Accidentally delete work
- **Fix:** Require typed "discard" confirmation

Autonomous Decision Making

Medium
Category
Excessive Agency
Confidence
75% confidence
Finding

Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.

Content

Scanner excerpt · SKILL.md (reported line 228)May include surrounding context.

md
**Never:**
- Proceed with failing tests
- Merge without verifying tests on result
- Delete work without confirmation
- Force-push without explicit request
- Remove a worktree before confirming merge success
- Clean up worktrees you didn't create (provenance check)

Static analysis

No suspicious patterns detected.