ndv-vigilant

ndv-vigilant is a skill for Claude Code from emb715/neurodiveragents. It costs 44 tokens per session (316 once invoked), scanned A, original, MIT.

A security checklist and reasoning guide for handling user input, authentication, data access, and other trust boundaries in software.

In plain words
What is it for?
Use it when designing or reviewing code that accepts input, protects operations, accesses data, creates tokens, or records security-related events.
Why use it?
It helps developers look for common weaknesses such as unchecked input, missing permission checks, exposed secrets, unsafe queries, and excessive access.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

Good fit Use it when designing or reviewing code that accepts input, protects operations, accesses data, creates tokens, or records security-related events.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/emb715/neurodiveragents/ndv-vigilant
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.

Any agent
npx skills add emb715/neurodiveragents --skill ndv-vigilant
Clone the repo
git clone --depth 1 https://github.com/emb715/neurodiveragents

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for ndv-vigilant

README.md
[![agentmods](https://agentmods.dev/badge/skills/emb715/neurodiveragents/ndv-vigilant/github.svg)](https://agentmods.dev/skills/emb715/neurodiveragents/ndv-vigilant)
Your own site
<a href="https://agentmods.dev/skills/emb715/neurodiveragents/ndv-vigilant"><img src="https://agentmods.dev/badge/skills/emb715/neurodiveragents/ndv-vigilant/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for ndv-vigilant

Your own site · 80×15
<a href="https://agentmods.dev/skills/emb715/neurodiveragents/ndv-vigilant"><img src="https://agentmods.dev/badge/skills/emb715/neurodiveragents/ndv-vigilant.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 44 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 316 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00044 $0.00316
Opus 5 $0.00022 $0.00158
Sonnet 5 $0.00009 $0.00063
Haiku 4.5 $0.00004 $0.00032

Measured 10d ago against content hash 078c1bd18c91, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

ndv-vigilant 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 10d ago.

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.

skills/ndv-vigilant/SKILL.md · 38 lines

What it actually says

The threat-detection system never turns off. Every input is a potential weapon. Every trust boundary is a liability until proven otherwise. Every "probably secure" is an assumption someone made without testing it.

Primordial rule: Trust no input. Assume breach. Every user-provided value is hostile until validated server-side. Client-side validation is UX, not security.

Constraints:

  • Validate all input server-side — type, format, bounds, authorization
  • Check auth on every protected operation — never assume the caller is authorized
  • No secrets in code, logs, or error messages
  • Use parameterized queries — never string concatenation for data access
  • Least privilege — grant minimum necessary access
  • Log auth failures and suspicious patterns, never log sensitive data
  • Use cryptographically secure randomness for tokens and secrets

Never:

  • Trust client-side validation as sufficient
  • Accept "probably secure" without testing
  • Log sensitive data (passwords, tokens, PII)
  • Use Math.random() for security-sensitive values
  • Hardcode secrets or credentials
  • Miss auth checks on endpoints that modify data
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.

  1. 10d ago First seen · 38 lines · 44 tokens per session scan A 078c1bd18c91

Subscribe to this mod's changes

ndv-vigilant is a skill published in the GitHub repository emb715/neurodiveragents (2 stars, last pushed 1mo ago), licensed MIT. It adds 44 tokens to every session and 316 once invoked, about $0.0002 per session on Opus 5. 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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