anti-monolith-guard

anti-monolith-guard is a skill for Claude Code, Codex from Sistema2D/FrameCode-VibeWork. It costs 17 tokens per session (1,496 once invoked), scanned A, original, Apache-2.0.

A checklist for keeping code and other project files focused on one responsibility. It helps decide when a large or mixed-purpose file should be split.

In plain words
What is it for?
Use it before adding features, pages, routes, services, components, models, prompts, workers, or modules—especially when editing a large file or adding another responsibility to it.
Why use it?
It reduces oversized modules, duplicated blocks, and vague implementation plans that are difficult to review or maintain.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it before adding features, pages, routes, services, components, models, prompts, workers, or modules—especially when editing a large file or adding another responsibility to it.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/sistema2d/framecode-vibework/anti-monolith-guard
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 Sistema2D/FrameCode-VibeWork --skill anti-monolith-guard
Clone the repo
git clone --depth 1 https://github.com/Sistema2D/FrameCode-VibeWork

Made for: Claude Code, Codex.

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 anti-monolith-guard

README.md
[![agentmods](https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/anti-monolith-guard/github.svg)](https://agentmods.dev/skills/sistema2d/framecode-vibework/anti-monolith-guard)
Your own site
<a href="https://agentmods.dev/skills/sistema2d/framecode-vibework/anti-monolith-guard"><img src="https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/anti-monolith-guard/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 anti-monolith-guard

Your own site · 80×15
<a href="https://agentmods.dev/skills/sistema2d/framecode-vibework/anti-monolith-guard"><img src="https://agentmods.dev/badge/skills/sistema2d/framecode-vibework/anti-monolith-guard.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 17 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,496 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. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 131
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
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 $0.00017 $0.01496
Opus 5 $0.00009 $0.00748
Sonnet 5 $0.00003 $0.00299
Haiku 4.5 $0.00002 $0.00150

Measured 10d ago against content hash e272deb1c612, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

anti-monolith-guard 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.

FCVW/skills/anti-monolith-guard/SKILL.md · 146 lines

How it starts

The opening of the file, as written. The whole thing — 146 lines — stays where its author put it; the contents beside it link to each section on GitHub.

SKILL: Anti-Monolith Guard

Purpose

Prevent AI agents from creating or expanding monolithic files, components, routes, services, prompts, or modules. This is a Markdown-only gate: it blocks unsafe structure through explicit checklist decisions, not scripts.

Activation Triggers

Load this skill before implementation when any condition is true:

  • creating a new feature, page, route, service, component, model, prompt pack, worker, or module;
  • editing a file already considered large or mixed-responsibility;
  • adding a second responsibility to an existing file;
  • copying a similar block because "it is faster";
  • retroactive instantiation finds a large application file without clear ownership;
  • the plan uses vague scope such as "implement dashboard", "build backend", "create full app", or "add whole flow".

Inputs

Active plan, target artifact, responsibility map, similar-code search, dependency/consumer evidence, current size or complexity indicators, and the checks that protect behavior during a split.

Applicability Classification

Classify the target before applying numeric thresholds:

Artifact class Automatic size enforcement Review focus
Source code, query, executable configuration, or runtime prompt Yes, using the closest project-adjusted budget responsibility, coupling, side effects, test boundary
Operational AI instruction or procedural skill Warning by default; block only when mixed responsibilities or unsafe context loading are demonstrated instruction hierarchy, retrieval cost, cohesion, provider neutrality
Canonical documentation, specification, report, plan, decision, or release record No numeric block cohesion, discoverability, ownership, document-graph relationships
Template, example, generated catalog, or historical record No numeric block schema correctness, generation source, reachability, preservation

Markdown is not automatically documentary: classify it by responsibility. A Markdown prompt that controls runtime behavior may be operational, while a long technical specification may remain one cohesive document.

Read the full file on GitHub · 146 lines

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 · 146 lines · 17 tokens per session scan A e272deb1c612

Subscribe to this mod's changes

anti-monolith-guard is a skill published in the GitHub repository Sistema2D/FrameCode-VibeWork (24 stars, last pushed 9d ago), licensed Apache-2.0. It adds 17 tokens to every session and 1,496 once invoked, about $0.0001 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 2026-08-30.

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