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file-validator

Validate a filename extension without opening any filesystem path

Skill by cisco-ai-defense

IndexedApache-2.0★ 2,626
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Install

Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/cisco-ai-defense-file-validator

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Validate a filename extension without opening any filesystem path

Use cases: security-scanning

Reviews

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
No tools found
Secrets
None asked for
Install scripts
None found
Runs as
Python package

Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/file-validator

What's inside

Skill name
file-validator
Description
Validate a filename extension without opening any filesystem path
License
Apache-2.0
Instructions
6 lines in SKILL.md · view on GitHub

Before installing

  • Ships executable scripts

Agent Skills spec issues

  • allowed-tools: must be a space-separated string

Files (3)

  • SKILL.md
  • _expected.json
  • validate.py

SKILL.md (first lines)

# File Validator

Use [validate.py](validate.py) to check whether a filename has an allowed
extension. The helper performs no I/O.

From cisco-ai-defense/skill-scanner, Apache-2.0.

More from cisco-ai-defense/skill-scanner

Signals

Stars
2,626
Forks
337
Open issues
0
Last commit (this folder)
Sep 3, 2026 (1 month ago)
Last release
Oct 21, 2026 (6 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
Apache-2.0
Repository
github.com/cisco-ai-defense/skill-scanner
Website
cisco-ai-defense.github.io/docs/skill-scanner
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

More from cisco-ai-defense

Cite this page

file-validator skill. Agent Mart. https://agentmart.dev/skills/cisco-ai-defense-file-validator (last updated 2026-10-24)