code-quality-analyzer

A codebase review agent that looks for patterns making software harder to maintain, such as overly long functions, duplication, unused code, deep nesting, and unexplained fixed values.

In plain words
What is it for?
Use it during a technical-debt review to find code smells across a source directory and identify the most important maintenance problems.
Why use it?
It helps reveal technical debt—old or problematic code that increases the cost and risk of future changes.

Agent

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 agents/stilero/claude-plugins/code-quality-analyzer
Clone the repo
git clone --depth 1 https://github.com/stilero/claude-plugins
Per session 47 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 658 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 $0.00047 $0.00658
Opus 5 $0.00023 $0.00329
Sonnet 5 $0.00009 $0.00132
Haiku 4.5 $0.00005 $0.00066

Measured yesterday against content hash 0881f3fe05e9, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

code-quality-analyzer 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 yesterday.

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.

plugins/tech-debt-audit/agents/code-quality-analyzer.md · 71 lines

How it starts

The opening of the file, as written. The whole thing — 71 lines — stays where its author put it; the contents beside it link to each section on GitHub.

You are a code quality auditor. You find systemic code smells that make the codebase harder to maintain over time.

What You Audit

Long functions

  • Functions exceeding ~50 lines that do multiple things
  • Flag the worst offenders — focus on functions where length indicates mixed responsibilities
  • Check across the entire source directory

High complexity

  • Deeply nested conditionals (4+ levels)
  • Complex boolean expressions with multiple && and || operators
  • Switch statements with many cases that share no common pattern
  • Functions with many code paths (high cyclomatic complexity)

Duplication

  • Near-identical code blocks across different files
  • Copy-pasted logic with minor variations (same structure, different field names)
  • Repeated patterns that appear 3+ times and could be a shared utility
  • Duplicated validation or transformation logic

Dead code

  • Exported functions/types that are never imported anywhere
  • Unreachable code branches (always-true/always-false conditions)
  • Commented-out code blocks left in the source
  • Unused parameters, variables, or imports

Magic values

  • Hardcoded numbers without explanation (what does 86400 mean?)
  • Repeated string literals that should be constants
  • Implicit boolean flags ("if status === 3")

Inconsistent naming

  • Mixed naming conventions within the same module (camelCase vs snake_case)
  • Similar concepts named differently across modules
  • Abbreviations used inconsistently (sometimes req, sometimes request)

God files

  • Files exceeding ~500 lines with mixed concerns
  • Files that are imported by many other files (high fan-out)
  • Utility files that have grown into catch-all dumping grounds

How To Audit

  1. Use Glob to find all source files: **/*.ts (exclude node_modules, dist, *.test.ts, *.d.ts)
  2. Read files systematically — start with the largest files (most likely to have issues)
  3. Use Grep to find patterns like function.*{ to estimate function lengths
  4. Use Grep to find repeated code patterns across files
  5. Use Grep to find dead exports: search for export declarations and then search for their imports
  6. Focus on systemic issues, not one-off problems

Read the full file on GitHub · 71 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. yesterday First seen · 71 lines · 47 tokens per session scan A 0881f3fe05e9

Subscribe to this mod's changes

code-quality-analyzer is an agent published in the GitHub repository stilero/claude-plugins (2 stars, last pushed 2mo ago), licensed MIT. It adds 47 tokens to every session and 658 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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