What is media-validator?

A media-validation server that checks MP4, PNG, and TXT files using OCR, metadata, and pattern matching, then reports PASS or FAIL with evidence.

It is for validating video, image, and text files and storing the results in the configured evidence directory.

It provides recorded evidence about whether supplied media files meet the configured checks.

media-validator — MCP server by HelixDevelopment

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add mcp/helixdevelopment/code/media-validator

Clone the repo

git clone --depth 1 https://github.com/HelixDevelopment/code

Made for: Claude Code, Codex, Cursor.

Per session not measured What this adds to a session before it is invoked.

When invoked not measured Not applicable: nothing here is loaded into a session.

Security scan A 0 findings. Scan, not verified.

Origin original No closer match found in the catalogue.

Security

Grade A, and why

media-validator scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.mcp.json · 15 lines

What it actually says

{
  "media-validator": {
    "description": "Validate media files (MP4, PNG, TXT) via OCR/metadata/pattern matching for PASS/FAIL with evidence (§11.4.164)",
    "type": "command",
    "command": "bash",
    "args": [
      "constitution/skills/media-validator/media-validator.sh"
    ],
    "env": {
      "MEDIA_VALIDATOR_EVIDENCE_DIR": "qa-results/media-validator"
    },
    "disabled": false,
    "autoApprove": []
  }
}

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

yesterday First seen · 15 lines scan A fdd073af71f7

Subscribe to this mod's changes

media-validator is an MCP server published in the GitHub repository HelixDevelopment/code (2 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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media-validator

Getting it into your agent

Grade A, and why

Nothing flagged

What it actually says

What this file has done since we first saw it

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