Trust Assessment
img-optimizer received a trust score of 79/100, placing it in the Mostly Trusted category. This skill has passed most security checks with only minor considerations noted.
SkillShield's automated analysis identified 2 findings: 0 critical, 1 high, 1 medium, and 0 low severity. Key findings include Missing required field: name, Potential Command Injection via Unsanitized Filenames.
The analysis covered 4 layers: Manifest Analysis, Static Code Analysis, Dependency Graph, LLM Behavioral Safety. All layers scored 70 or above, reflecting consistent security practices.
Last analyzed on February 14, 2026 (commit 13146e6a). SkillShield performs automated 4-layer security analysis on AI skills and MCP servers.
Layer Breakdown
Behavioral Risk Signals
Security Findings2
| Severity | Finding | Layer | Location | |
|---|---|---|---|---|
| HIGH | Potential Command Injection via Unsanitized Filenames The skill provides shell commands for image processing that operate on filenames. The 'Security' section explicitly warns to 'Sanitize filenames before processing — avoid shell injection via crafted filenames.' However, the skill itself does not implement this sanitization. If an LLM or calling environment uses user-provided filenames directly in these commands without proper sanitization, it could lead to command injection, allowing arbitrary shell commands to be executed. For example, a filename like `image.png; rm -rf /` could lead to the execution of `rm -rf /` if not properly escaped by the calling environment. The skill should either implement robust input sanitization internally for all user-provided filenames before they are used in shell commands, or provide explicit, detailed instructions and helper functions for the LLM to perform this sanitization safely. This involves escaping or filtering shell metacharacters to prevent malicious command execution. | LLM | SKILL.md:69 | |
| MEDIUM | Missing required field: name The 'name' field is required for claude_code skills but is missing from frontmatter. Add a 'name' field to the SKILL.md frontmatter. | Static | skills/sa9saq/img-optimizer/SKILL.md:1 |
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