common-architecture-audit

common-architecture-audit is a skill for Claude Code, Codex from HoangNguyen0403/agent-skills-standard. It costs 47 tokens per session (628 once invoked), scanned A, original, MIT.

A method for reviewing a codebase's structure to find duplicated sources of truth, misplaced logic, and overly large classes or components.

In plain words
What is it for?
Use it to inspect web, mobile, and backend projects for duplicated versions, business logic in the wrong layer, and monolithic files.
Why use it?
It reveals architectural debt that can make code harder to change, test, and understand.

Skill for Claude CodeCodex

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

Good fit Use it to inspect web, mobile, and backend projects for duplicated versions, business logic in the wrong layer, and monolithic files.

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Install with agentmods
npx agentmods add skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit
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 HoangNguyen0403/agent-skills-standard --skill common-architecture-audit
Clone the repo
git clone --depth 1 https://github.com/HoangNguyen0403/agent-skills-standard

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 common-architecture-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit/github.svg)](https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit)
Your own site
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit/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 common-architecture-audit

Your own site · 80×15
<a href="https://agentmods.dev/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit"><img src="https://agentmods.dev/badge/skills/hoangnguyen0403/agent-skills-standard/common-architecture-audit.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 47 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 628 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 pass 7 Sept 2026
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 $0.00047 $0.00628
Opus 5 $0.00023 $0.00314
Sonnet 5 $0.00009 $0.00126
Haiku 4.5 $0.00005 $0.00063

Measured 9d ago against content hash f2d4ea28d428, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

common-architecture-audit 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 9d 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/common/common-architecture-audit/SKILL.md · 70 lines

What it actually says

Architecture Audit

Priority: P1 (HIGH)

1. Discover Structural Duplication

Identify split sources of truth by searching for redundant directory patterns.

  • Compare Service.ts vs ServiceNew.ts vs ServiceV2.ts.
  • Check for /v1, /v2 or "Refactor" folders.

See implementation examples for detection scripts.

2. Detect Logic Leakage (by Ecosystem)

Find business logic trapped in wrong layer.

  • Web (React/Next.js/Vue): grep -rE "useEffect|useState|useMemo" components --include="*.tsx" | wc -l — if components/ hook count > 20x hooks/ folder, architecture monolithic.
  • Mobile (Flutter/React Native): grep -rE "http\.|dio\.|socket\." lib/widgets --include="*.dart" | wc -l — I/O or state mutation > 5 lines in build() High Debt.
  • Backend (NestJS/Go/Spring): grep -rE "Repository\.|Query\.|db\." src/controllers --include="*.ts" | wc -l — Controllers must only handle request parsing and response formatting.

3. Identify Monoliths

Flag massive files violating Single Responsibility Principle.

  • UI: > 500 lines (Medium), > 1,000 lines (Critical).
  • Backend Services: > 1,500 lines indicates "God Class".

See implementation examples for monolith detection scripts.

4. Audit Resource Performance

Check for large metadata or constants impacting IDE performance and binary size.

  • Resources > 1,000 lines require granulation.

See implementation examples for resource audit scripts.

Scoring Impact

  • Layer Violation: -15 per business logic instance in UI/Controller layer.
  • Structural Fragmentation: -10 per duplicated legacy entity.
  • Monoliths: -10 per unit > 1,000 lines.

Anti-Patterns

  • No applying generic patterns over project-specific rules: Respect existing architecture constraints.
  • No ignoring error handling or edge cases: Audit must cover boundary conditions.

References

Files

What ships with it

4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 9d ago First seen · 70 lines · 47 tokens per session scan A f2d4ea28d428

Subscribe to this mod's changes

common-architecture-audit is a skill published in the GitHub repository HoangNguyen0403/agent-skills-standard (565 stars, last pushed 3d ago), licensed MIT. It adds 47 tokens to every session and 628 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 2026-09-03.