srp

A guided refactoring procedure for fixing violations of the Single Responsibility Principle, which says that one class or function should have one clear kind of job. It analyzes selected files and asks for confirmation before changing them.

In plain words
What is it for?
Use it with a file or directory, staged changes, or unstaged changes to identify mixed responsibilities and propose a fix with a summary of the resulting diff.
Why use it?
It helps separate unrelated work—such as validation, storage, and formatting—when one piece of code has become difficult to understand or 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/muthuspark/solid-audit/srp
Any agent
npx skills add muthuspark/solid-audit --skill srp
Clone the repo
git clone --depth 1 https://github.com/muthuspark/solid-audit

Made for: Claude Code, Codex.

Per session 14 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,258 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 $0.00014 $0.01258
Opus 5 $0.00007 $0.00629
Sonnet 5 $0.00003 $0.00252
Haiku 4.5 $0.00001 $0.00126

Measured 2d ago against content hash 4ae2156c68e1, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

srp 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 2d 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.

solid-audit/skills/srp/SKILL.md · 118 lines

How it starts

The opening of the file, as written. The whole thing — 118 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Trigger

This skill activates when the user runs /srp (optionally with a file path argument, e.g. /srp src/services/user.py).

Scope Detection

Determine which files to analyze using this priority order:

  1. Argument — If the user provided a file or directory path after /srp, use that directly.
  2. Git staged — Run git diff --cached --name-only. If output is non-empty, use those files.
  3. Git unstaged — Run git diff --name-only. If output is non-empty, use those files.
  4. Ask user — If no git diff is available, ask for a file or directory path.

Always skip: *.lock, package-lock.json, yarn.lock, pnpm-lock.yaml, Gemfile.lock, composer.lock, **/migrations/**, **/__generated__/**, **/fixtures/**, **/*.min.js

SRP Fix Logic

Detection

A class or function violates SRP when it handles two or more unrelated concerns. Look for:

  • A class with method groups belonging to distinct responsibilities (e.g., data parsing AND persistence AND notification in one class)
  • A function that validates, persists, and formats output all in one body
  • A class whose name contains "And", "Manager", or "Handler" and does multiple unrelated things
  • A class that imports from two or more unrelated domains (e.g., imports both smtplib and database drivers)

Fix Strategy

For classes: Extract each distinct responsibility into its own focused class:

  1. Identify the distinct responsibility groups within the violating class
  2. For each group, create a new class with a single, clear name
  3. Move the relevant methods/logic to the new class
  4. Update the original class to accept the new classes via constructor injection (if needed) or remove it entirely
  5. Preserve the original public interface — callers of the original class must not need to change

For functions: Split a multi-concern function into multiple focused functions:

  1. Identify the distinct steps in the function body (e.g., validate → persist → notify)
  2. Extract each step into its own named function with a clear, single-purpose name
  3. Replace the original body with calls to the extracted functions, or remove the monolith and update callers
  4. Each extracted function should be testable independently

Read the full file on GitHub · 118 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. 2d ago First seen · 118 lines · 14 tokens per session scan A 4ae2156c68e1

Subscribe to this mod's changes

srp is a skill published in the GitHub repository muthuspark/solid-audit (5 stars, last pushed 5mo ago), licensed Apache-2.0. It adds 14 tokens to every session and 1,258 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 2026-08-31.

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