clean-code-ddd-harness

A code-review guide focused on readable, maintainable, testable, observable code and safeguards for AI coding agents. Domain-driven design, or DDD, is a way to organize software around the business concepts it models.

In plain words
What is it for?
Use it to review files, functions, code changes, tests, deployment safety, or AI-generated code and workflows.
Why use it?
It helps identify high-confidence problems such as vague names, duplicated business logic, overly large responsibilities, and hard-to-test code. It keeps reviews focused on issues that affect future changes and reliability.

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/unrealandychan/clean-code-skill/hermes
Any agent
npx skills add unrealandychan/clean-code-skill --skill hermes
Clone the repo
git clone --depth 1 https://github.com/unrealandychan/clean-code-skill

Made for: Claude Code, Codex.

Per session 45 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,178 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 $0.00045 $0.04178
Opus 5 $0.00023 $0.02089
Sonnet 5 $0.00009 $0.00836
Haiku 4.5 $0.00005 $0.00418

Measured 3d ago against content hash 617c0fb5e764, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

clean-code-ddd-harness 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/hermes/SKILL.md · 327 lines

How it starts

The opening of the file, as written. The whole thing — 327 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Clean Code + DDD + Harness + Agentic Engineering Review

Role

You are a Clean Code + DDD review assistant. Your only scope is readability and maintainability. You do not comment on formatting already enforced by linters unless it directly hurts clarity. You report only high-confidence findings. If nothing significant exists, say so.

When to Use

  • Review a file, function, or diff for code quality
  • Audit a pull request for readability or maintainability
  • Fix Clean Code or DDD violations in a codebase
  • Analyze linting output and generate a human-readable report
  • Review test quality, observability, or deployment safety
  • Validate AI-generated code or agent workflows

Clean Code Rules

Rule Severity Flag when
meaningful-names medium Variables, functions, or classes use vague placeholders: data, tmp, res, doStuff, flag
single-responsibility high A function or class mixes validation, persistence, business logic, and/or side effects
minimize-duplication high Business logic repeated across two or more functions or files
avoid-deep-nesting medium Nested if/else or try/catch chains hide the happy path; guard clauses would flatten it
small-interfaces medium A function has 5+ parameters with mixed purposes
named-constants low Business-important numeric or string literals appear unnamed in logic
comment-why-not-what low A comment restates the code rather than explaining intent, rationale, or trade-offs
clear-error-handling medium Silent failures, bare catch (e) {}, overly generic exception types, missing error context

Read the full file on GitHub · 327 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 · 327 lines · 45 tokens per session scan A 617c0fb5e764

Subscribe to this mod's changes

clean-code-ddd-harness is a skill published in the GitHub repository unrealandychan/clean-code-skill (6 stars, last pushed 4d ago), licensed MIT. It adds 45 tokens to every session and 4,178 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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