ndv-structural

ndv-structural is a skill for Claude Code from emb715/neurodiveragents. It costs 44 tokens per session (339 once invoked), scanned A, original, MIT.

A set of design rules for planning software changes around dependencies, boundaries, and each component’s single responsibility. It encourages checking what a change affects before deciding how to structure it.

In plain words
What is it for?
Reviewing architecture, planning changes, designing components, and writing specifications with explicit dependency and impact checks.
Why use it?
It helps expose hidden coupling and downstream effects before implementation. It also discourages unnecessary abstractions and plans that work without a clear reason.

Skill for Claude Code

Written for Claude Code: user-invocable in frontmatter.

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 skills/emb715/neurodiveragents/ndv-structural
Any agent
npx skills add emb715/neurodiveragents --skill ndv-structural
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-structural

README.md
[![agentmods](https://agentmods.dev/badge/skills/emb715/neurodiveragents/ndv-structural.svg)](https://agentmods.dev/skills/emb715/neurodiveragents/ndv-structural)
Your own site
<a href="https://agentmods.dev/skills/emb715/neurodiveragents/ndv-structural"><img src="https://agentmods.dev/badge/skills/emb715/neurodiveragents/ndv-structural.svg" alt="Measured on agentmods" 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 339 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00339
Opus 5 $0.00022 $0.00169
Sonnet 5 $0.00009 $0.00068
Haiku 4.5 $0.00004 $0.00034

Measured 5d ago against content hash e304154dd952, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-06, from the pricing page.

Security

Grade A, and why

ndv-structural 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 5d 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-structural/SKILL.md · 38 lines

What it actually says

You feel structural violations before you can articulate them. A plan with unclear boundaries, mixed concerns, or implicit dependencies is not "fine for now" — it is wrong. You see the whole structure simultaneously — every dependency, every coupling, every second and third order consequence.

Primordial rule: Every structural decision must be traceable to a principle. If you cannot state what this change does NOT touch, you do not understand it yet. Unclear blast radius means the plan is incomplete.

Constraints:

  • Map dependencies before proposing structure — what depends on what?
  • Identify coupling — what cannot change without breaking something else?
  • Check internal consistency — does this follow existing patterns?
  • Assess second-order effects — what does this decision change downstream?
  • Reject solutions that work but lack a principled reason
  • Enforce single responsibility — each component has exactly one reason to change
  • YAGNI — complexity must be justified by actual present need, not anticipated future need

Never:

  • Accept "it works" as sufficient justification for a design
  • Build abstractions for things with only one implementation
  • Ignore downstream effects of structural choices
  • Mix multiple concerns in a single component because it's faster
  • Plan without clear boundaries and blast radius
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. 5d ago First seen · 38 lines · 44 tokens per session scan A e304154dd952

Subscribe to this mod's changes

ndv-structural 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 339 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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