dry-principle
This rule enforces the Don't Repeat Yourself principle to avoid code duplication and improve maintainability.
- Installs
- 155
- Last 24h
- —
- Trending rank
- —
- Security
- Not audited
Install
Works with every agent the skills CLI supports.
npx skills add https://github.com/oimiragieo/agent-studio --skill dry-principle- 01
Install
Run the command in your project. The CLI asks which agents to install for.
- 02
Describe the task
Ask your agent for something this skill covers. It loads dry-principle automatically when relevant.
- 03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.
SKILL.md
The instructions your agent reads when the skill is triggered.
Dry Principle Skill
<identity> You are a coding standards expert specializing in dry principle. You help developers write better code by applying established guidelines and best practices. </identity> <capabilities> - Review code for guideline compliance - Suggest improvements based on best practices - Explain why certain patterns are preferred - Help refactor code to meet standards </capabilities> <instructions> When reviewing or writing code, apply these guidelines:- Follow the DRY (Don't Repeat Yourself) Principle and Avoid Duplicating Code or Logic.
- Avoid writing the same code more than once. Instead, reuse your code using functions, classes, modules, libraries, or other abstractions.
- Modify code in one place if you need to change or update it. </instructions>
Iron Laws
- NEVER extract to a shared abstraction until you have at least 3 concrete instances of the same logic — premature extraction creates wrong abstractions that are harder to remove than the original duplication.
- ALWAYS maintain a single source of truth for configuration values — the same constant or config value defined in two places will diverge and cause bugs.
- NEVER apply DRY to coincidentally similar code that serves different purposes — coupling unrelated concepts through shared abstractions creates cascading change requirements.
- ALWAYS prefer readability over DRY when the abstraction requires indirection that obscures what the code does — a small amount of duplication is often better than an obscure helper.
- NEVER use copy-paste as a first resort for new similar functionality — always check whether an existing abstraction can be extended or parameterized first.
Anti-Patterns
| Anti-Pattern | Why It Fails | Correct Approach |
|---|---|---|
| Extracting on the second occurrence (Rule of Two) | Two instances may be coincidentally similar; wrong abstraction is worse than duplication | Wait for the third occurrence before extracting; use the Rule of Three |
| Coupling unrelated concepts through shared helpers | Changes to one domain break the other; creates unexpected dependencies | Only extract when the shared logic genuinely represents the same domain concept |
| Over-abstracting to eliminate all apparent duplication | Creates complex indirection that requires reading 3 files to understand 1 operation | Prefer 3 readable duplicate lines over 1 inscrutable abstraction |
| Same constant defined in multiple configuration files | Values diverge silently; one-off changes cause hard-to-trace bugs | Single config module or environment variable; import everywhere |
| DRY applied to test code (reducing fixture duplication) | Test setup that's too DRY becomes hard to read in isolation | Tests should be self-contained; some duplication in test setup is acceptable |
Memory Protocol (MANDATORY)
Before starting:
cat .claude/context/memory/learnings.md
After completing: Record any new patterns or exceptions discovered.
ASSUME INTERRUPTION: Your context may reset. If it's not in memory, it didn't happen.
FAQ
What does the dry-principle skill do?
This rule enforces the Don't Repeat Yourself principle to avoid code duplication and improve maintainability.
How do I install dry-principle?
Run npx skills add https://github.com/oimiragieo/agent-studio --skill dry-principle in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/dry-principle/ (personal) or .claude/skills/dry-principle/ (project).
Which AI agents can use dry-principle?
Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.
Is dry-principle safe to install?
No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.
Who maintains dry-principle?
It is published by oimiragieo in oimiragieo/agent-studio. It has 155 recorded installs.
More from oimiragieo/agent-studio
pyqt6-ui-development-rules
oimiragieo/agent-studio
PyQt6 desktop GUI development rules -- signal/slot architecture, QSS theming, QThread concurrency, layout management, and cross-platform rendering. Enforces MVC separation and responsive UI patterns.
filesystem
oimiragieo/agent-studio
File system operations guidance - read, write, search, and manage files using Claude Code's built-in tools.
chrome-browser
oimiragieo/agent-studio
Browser automation with two integrations - Chrome DevTools MCP (always available, performance tracing) and Claude-in-Chrome extension (authenticated sessions, GIF recording). Use DevTools for testing/debugging, Claude-in-Chrome for authenticated workflows.
slack-notifications
oimiragieo/agent-studio
Slack messaging, channels, and notifications - send messages, manage channels, interact with users, upload files, and add reactions. Use for team communication, incident notifications, and workflow alerts.
context-compressor
oimiragieo/agent-studio
Compress large context before reasoning to reduce token usage while preserving evidence. Use this whenever the user mentions huge files, long prompts, RAG payloads, prompt caching, expensive sessions, codebase context, chat history compaction, or wants the same answer quality with fewer tokens.
nodejs-expert
oimiragieo/agent-studio
Node.js backend expert including Express, NestJS, and async patterns
Popular other skills
hyperframes-cli
heygen-com/hyperframes
The HyperFrames CLI by job - scaffold, check, look at frames, edit the timeline, preview, render locally or in the cloud, publish, project history - plus reading its JSON and recovering from build or render failures.
triage
mattpocock/skills
Move issues and external PRs through a state machine of triage roles, categorise, verify, grill if needed, and write agent-ready briefs.
ask-matt
mattpocock/skills
Ask which skill or flow fits your situation. A router over the skills in this repo.
to-questionnaire
mattpocock/skills
Turn a decision you can't fully answer into a questionnaire for someone else to fill in.
loop-me
mattpocock/skills
Grill me about specs for the workflows I want to build, within this workspace.