audit-maintainability

audit-maintainability is a skill for Claude Code, Codex from tomzx/agents. It costs 138 tokens per session (2,205 once invoked), scanned A, original, MIT.

A codebase review for maintainability, meaning how easily software can be changed, understood, reused, and tested. It uses the ISO/IEC 25010 software-quality model and checks the relationships between modules.

In plain words
What is it for?
Use it to assess coupling, module dependencies, layering, complexity, test gaps, duplicated code, dead code, and other factors in one maintainability report.
Why use it?
It reveals structural problems that file-by-file checks can miss, such as tightly connected modules, circular dependencies, broken layers, and oversized modules that are hard to change safely.

Skill for Claude CodeCodex

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/tomzx/agents/audit-maintainability
Any agent
npx skills add tomzx/agents --skill audit-maintainability
Clone the repo
git clone --depth 1 https://github.com/tomzx/agents

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 audit-maintainability

README.md
[![agentmods](https://agentmods.dev/badge/skills/tomzx/agents/audit-maintainability.svg)](https://agentmods.dev/skills/tomzx/agents/audit-maintainability)
Your own site
<a href="https://agentmods.dev/skills/tomzx/agents/audit-maintainability"><img src="https://agentmods.dev/badge/skills/tomzx/agents/audit-maintainability.svg" alt="Measured on agentmods" height="20"></a>
Per session 138 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,205 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 $0.00138 $0.02205
Opus 5 $0.00069 $0.01103
Sonnet 5 $0.00028 $0.00441
Haiku 4.5 $0.00014 $0.00220

Measured 3d ago against content hash 90cf8da429cc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

audit-maintainability 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 3d 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/audit-maintainability/SKILL.md · 212 lines

How it starts

The opening of the file, as written. The whole thing — 212 lines — stays where its author put it; the contents beside it link to each section on GitHub.

TODAY=!date +%Y-%m-%d

Maintainability Audit (ISO/IEC 25010)

Audits the codebase for maintainability: how easily it can be modified to fix bugs, improve performance, or adapt to a changed environment. It computes the architectural maintainability metrics that per-function scanners miss, then rolls the find-* family's output into one maintainability scorecard.

This is the Maintainability characteristic of the ISO/IEC 25010 quality model.

What This Skill Adds Beyond the find-* Family

The find-* skills are per-function or per-file scanners (complexity, coverage, dead code, duplication, types). They cannot see structure: which module depends on which, whether layers are respected, whether cycles exist, whether one module is a God object. This skill computes those structural metrics and aggregates everything into one view.

Source What it provides here
find-complexity-hotspots Modifiability: high cyclomatic complexity
find-coverage-gaps Testability: untested code
find-dead-code Reusability/analyzability: code that should be removed
find-code-duplication Reusability: copy-paste to consolidate
find-type-gaps Analyzability/modifiability: missing types
This skill (unique) Modularity: coupling (fan-out), cohesion, circular dependencies, layering violations, God modules

Prerequisites

  • Working directory is the root of the repository
  • Read .sdlc/context/architecture.md if present (declares intended layering rules this audit checks against)
  • find-* skills available (invoked as read-only scanners)

What This Checks

Sub-characteristic Metric How computed
Modularity coupling / fan-out count of distinct modules each module imports
Modularity circular dependencies import graph cycle detection
Modularity layering violations actual imports vs declared layers in architecture.md
Modularity God modules modules with LOC or import-count far above the median
Cohesion mixed-concern modules modules whose public functions span unrelated responsibilities (heuristic: divergent import sets)
Reusability duplication delegates to find-code-duplication
Analyzability missing docs/types delegates to find-documentation-gaps, find-type-gaps
Modifiability complexity delegates to find-complexity-hotspots
Testability coverage gaps delegates to find-coverage-gaps

Read the full file on GitHub · 212 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. 3d ago First seen · 212 lines · 138 tokens per session scan A 90cf8da429cc

Subscribe to this mod's changes

audit-maintainability is a skill published in the GitHub repository tomzx/agents (5 stars, last pushed today), licensed MIT. It adds 138 tokens to every session and 2,205 once invoked, about $0.0007 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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