majiayu000 Clean Code - Pragmatic AI Coding Standards
⚠️ AUTHORIZED USE ONLY This skill is for educational purposes or authorized security assessments only. You must have explicit, written permission from the system owner before using this tool. Misuse of this tool is illegal and strictly prohibited.
CRITICAL SKILL - Be concise, direct, and solution-focused.
Core Principles
| Principle | Rule |
|---|---|
| SRP | Single Responsibility - each function/class does ONE thing |
| DRY | Don't Repeat Yourself - extract duplicates, reuse |
| KISS | Keep It Simple - simplest solution that works |
| YAGNI | You Aren't Gonna Need It - don't build unused features |
| Boy Scout | Leave code cleaner than you found it |
Naming Rules
| Element | Convention |
|---|---|
| Variables | Reveal intent: userCount not n |
| Functions | Verb + noun: getUserById() not user() |
| Booleans | Question form: isActive, hasPermission, canEdit |
| Constants | SCREAMING_SNAKE: MAX_RETRY_COUNT |
Rule: If you need a comment to explain a name, rename it.
Function Rules
| Rule | Description |
|---|---|
| Small | Max 20 lines, ideally 5-10 |
| One Thing | Does one thing, does it well |
| One Level | One level of abstraction per function |
| Few Args | Max 3 arguments, prefer 0-2 |
| No Side Effects | Don't mutate inputs unexpectedly |
Code Structure
| Pattern | Apply |
|---|---|
| Guard Clauses | Early returns for edge cases |
| Flat > Nested | Avoid deep nesting (max 2 levels) |
| Composition | Small functions composed together |
| Colocation | Keep related code close |
AI Coding Style
| Situation | Action |
|---|---|
| User asks for feature | Write it directly |
| User reports bug | Fix it, don't explain |
| No clear requirement | Ask, don't assume |
Anti-Patterns (DON'T)
| ❌ Pattern | ✅ Fix |
|---|---|
| Comment every line | Delete obvious comments |
| Helper for one-liner | Inline the code |
| Factory for 2 objects | Direct instantiation |
| utils.ts with 1 function | Put code where used |
| "First we import..." | Just write code |
| Deep nesting | Guard clauses |
| Magic numbers | Named constants |
| God functions | Split by responsibility |
🔴 Before Editing ANY File (THINK FIRST!)
Before changing a file, ask yourself:
| Question | Why |
|---|---|
| What imports this file? | They might break |
| What does this file import? | Interface changes |
| What tests cover this? | Tests might fail |
| Is this a shared component? | Multiple places affected |
Quick Check:
File to edit: UserService.ts
└── Who imports this? → UserController.ts, AuthController.ts
└── Do they need changes too? → Check function signatures
🔴 Rule: Edit the file + all dependent files in the SAME task. 🔴 Never leave broken imports or missing updates.
Summary
| Do | Don't |
|---|---|
| Write code directly | Write tutorials |
| Let code self-document | Add obvious comments |
| Fix bugs immediately | Explain the fix first |
| Inline small things | Create unnecessary files |
| Name things clearly | Use abbreviations |
| Keep functions small | Write 100+ line functions |
Remember: The user wants working code, not a programming lesson.
🔴 Self-Check Before Completing (MANDATORY)
Before saying "task complete", verify:
| Check | Question |
|---|---|
| ✅ Goal met? | Did I do exactly what user asked? |
| ✅ Files edited? | Did I modify all necessary files? |
| ✅ Code works? | Did I test/verify the change? |
| ✅ No errors? | Lint and TypeScript pass? |
| ✅ Nothing forgotten? | Any edge cases missed? |
🔴 Rule: If ANY check fails, fix it before completing.
Verification Scripts (MANDATORY)
🔴 CRITICAL: Each agent runs ONLY their own skill's scripts after completing work.
Agent → Script Mapping
| Agent | Script | Command |
|---|---|---|
| frontend-specialist | UX Audit | python .agent/skills/frontend-design/scripts/ux_audit.py . |
| frontend-specialist | A11y Check | python .agent/skills/frontend-design/scripts/accessibility_checker.py . |
| backend-specialist | API Validator | python .agent/skills/api-patterns/scripts/api_validator.py . |
| mobile-developer | Mobile Audit | python .agent/skills/mobile-design/scripts/mobile_audit.py . |
| database-architect | Schema Validate | python .agent/skills/database-design/scripts/schema_validator.py . |
| security-auditor | Security Scan | python .agent/skills/vulnerability-scanner/scripts/security_scan.py . |
| seo-specialist | SEO Check | python .agent/skills/seo-fundamentals/scripts/seo_checker.py . |
| seo-specialist | GEO Check | python .agent/skills/geo-fundamentals/scripts/geo_checker.py . |
| performance-optimizer | Lighthouse | python .agent/skills/performance-profiling/scripts/lighthouse_audit.py <url> |
| test-engineer | Test Runner | python .agent/skills/testing-patterns/scripts/test_runner.py . |
| test-engineer | Playwright | python .agent/skills/webapp-testing/scripts/playwright_runner.py <url> |
| Any agent | Lint Check | python .agent/skills/lint-and-validate/scripts/lint_runner.py . |
| Any agent | Type Coverage | python .agent/skills/lint-and-validate/scripts/type_coverage.py . |
| Any agent | i18n Check | python .agent/skills/i18n-localization/scripts/i18n_checker.py . |
❌ WRONG:
test-engineerrunningux_audit.py✅ CORRECT:frontend-specialistrunningux_audit.py
🔴 Script Output Handling (READ → SUMMARIZE → ASK)
When running a validation script, you MUST:
- Run the script and capture ALL output
- Parse the output - identify errors, warnings, and passes
- Summarize to user in this format:
## Script Results: [script_name.py]
### ❌ Errors Found (X items)
- [File:Line] Error description 1
- [File:Line] Error description 2
### ⚠️ Warnings (Y items)
- [File:Line] Warning description
### ✅ Passed (Z items)
- Check 1 passed
- Check 2 passed
**Should I fix the X errors?**
- Wait for user confirmation before fixing
- After fixing → Re-run script to confirm
🔴 VIOLATION: Running script and ignoring output = FAILED task. 🔴 VIOLATION: Auto-fixing without asking = Not allowed. 🔴 Rule: Always READ output → SUMMARIZE → ASK → then fix.
When to Use
- Use this skill when you need for functional programming or specific domain tasks.