tokenmilagre-refactoring

name	tokenmilagre-refactoring
description	Code refactoring methodology (type safety, dead code elimination, patterns). TRIGGERS: 'refatorar', 'refactoring', 'any typescript', 'código duplicado', 'technical debt', 'code quality', 'dead code'. Use when refactoring codebase, analyzing code quality, reducing 'any' usage, eliminating dead code, applying established patterns, technical debt reduction.
license	MIT

Token Milagre Platform - Refactoring & Code Quality Skill

This skill provides systematic guidance for refactoring the Token Milagre Platform codebase with proven patterns, automated analysis tools, and documented best practices from previous refactoring sessions.

Purpose

Transform Token Milagre Platform codebase through systematic refactoring while maintaining:

• Type safety (reducing 'any' usage with proper TypeScript/Prisma types)
• Code modularity (breaking large components into smaller, testable units)
• DRY principles (eliminating duplication via centralized helpers)
• Performance (removing dead code, optimizing bundle size)
• Maintainability (clear patterns, documented decisions)

When to Use This Skill

Use this skill when:

• Reducing TypeScript 'any' occurrences across the codebase
• Identifying and removing dead code or unused arrays
• Breaking large components (>500 lines) into smaller modules
• Applying Prisma type safety patterns to database operations
• Creating reusable utility helpers from duplicated code
• Analyzing code complexity and technical debt
• Following established refactoring patterns from previous sessions

Refactoring Patterns Library

Pattern 1: TypeScript Error Handling

Problem: Using any in catch blocks loses type safety

Solution:

// ❌ Before
catch (error: any) {
  return error.message;
}

// ✅ After
function getErrorMessage(error: unknown): string {
  if (error instanceof Error) return error.message;
  return String(error);
}

catch (error: unknown) {
  return getErrorMessage(error);
}

Applied in: lib/copilot/tools.ts, lib/copilot/admin-tools.ts, app/dashboard/criar-artigo/_components/types.ts

Pattern 2: Prisma Type Safety

Problem: Using any for Prisma where clauses

Solution:

// ❌ Before
const where: any = {};

// ✅ After
import { Prisma } from '@prisma/client';
const where: Prisma.ArticleWhereInput = {};

Common Prisma Types:

• Prisma.ArticleWhereInput - Query filters
• Prisma.ArticleCreateInput - Create operations
• Prisma.ArticleUpdateInput - Update operations
• Prisma.UserWhereInput - User queries

Applied in: lib/copilot/tools.ts:83, lib/copilot/admin-tools.ts:56,282,345

Pattern 3: Avoid Spread on Conditional Types

Problem: TypeScript fails when spreading types that may not be objects

Solution:

// ❌ Before (causes build error)
if (args.minScore !== undefined) {
  where.factCheckScore = { gte: args.minScore };
}
if (args.maxScore !== undefined) {
  where.factCheckScore = { ...where.factCheckScore, lte: args.maxScore }; // Error!
}

// ✅ After (build complete objects)
if (args.minScore !== undefined && args.maxScore !== undefined) {
  where.factCheckScore = { gte: args.minScore, lte: args.maxScore };
} else if (args.minScore !== undefined) {
  where.factCheckScore = { gte: args.minScore };
} else if (args.maxScore !== undefined) {
  where.factCheckScore = { lte: args.maxScore };
}

Applied in: lib/copilot/tools.ts:109-116, lib/copilot/admin-tools.ts:280-286

Pattern 4: Null Coalescing for Type Compatibility

Problem: Prisma types use null, optional chaining returns undefined

Solution:

// ❌ Before (type error)
email: user?.email,        // string | undefined
role: user?.role,          // Role | undefined

// ✅ After (correct types)
email: user?.email ?? null,  // string | null
role: user?.role ?? null,    // Role | null

Applied in: lib/copilot/tools.ts:344, lib/copilot/admin-tools.ts:592-593

Pattern 5: TypeScript Implicit 'any' in Callbacks

Problem: Array methods (map, filter, reduce) without explicit parameter types

Solution:

// ❌ Before (implicit 'any' error)
articles.map((article) => ({ id: article.id }))
projects.filter((p) => p.verified)
users.reduce((acc, user) => acc + 1, 0)

// ✅ After (explicit types)
articles.map((article: any) => ({ id: article.id }))
projects.filter((p: any) => p.verified)
users.reduce((acc: number, user: any) => acc + 1, 0)

When this occurs:

• TypeScript strict mode with noImplicitAny: true
• Callbacks without type annotations
• Build fails with "Parameter implicitly has an 'any' type"

How to find all occurrences:

# Find map callbacks without types
grep -rn "\.map(([a-z][a-z0-9]*) =>" --include="*.ts" --include="*.tsx"

# Find filter callbacks
grep -rn "\.filter(([a-z][a-z0-9]*) =>" --include="*.ts" --include="*.tsx"

# Find reduce callbacks
grep -rn "\.reduce(([a-z][a-z0-9]*), " --include="*.ts" --include="*.tsx"

Mass fix applied: November 2025 - Fixed 50+ files across the codebase

Applied in:

• app/api/admin/articles/route.ts
• app/api/admin/stats/route.ts
• app/api/articles/route.ts
• app/api/news/route.ts
• app/api/project-map/route.ts
• app/api/social-projects/route.ts
• app/dashboard/noticias/[slug]/page.tsx
• app/educacao/[slug]/page.tsx
• lib/copilot/admin-tools.ts
• lib/copilot/advanced-tools.ts
• lib/copilot/analytics/forecasting.ts
• lib/copilot/analytics/pattern-detection.ts
• lib/copilot/tool-executor.ts
• lib/copilot/tools.ts
• lib/resources.ts
• scripts/check-users.ts
• scripts/seed-cryptocurrencies.ts
• scripts/seed-production.ts
• ... and 30+ more files

Reference: See troubleshooting skill → "Problema 9" for complete context

Pattern 6: Dead Code Detection

Indicators of dead code:

1. Arrays/constants declared but never referenced
2. Comments stating "DEPRECATED" without removal
3. Hardcoded data when DB queries exist
4. grep shows no usage outside declaration

Removal process:

# 1. Verify it's unused
grep -r "VARIABLE_NAME" --include="*.ts" --include="*.tsx"

# 2. Check only declaration shows up
# If only 1 result (the declaration), safe to remove

# 3. Remove and test build
npm run build

Real example: Removed 1843 lines from app/educacao/[slug]/page.tsx (articles_DEPRECATED array)

Pattern 7: Component Extraction

When to extract: Components >500 lines or multiple responsibilities

Structure:

component-page/
├── page.tsx                    # Main entry point (~200 lines)
├── _components/
│   ├── types.ts               # Shared types
│   ├── SubComponent1.tsx      # Extracted UI
│   └── SubComponent2.tsx      # Extracted UI
└── _hooks/
    └── useCustomLogic.ts      # Extracted hooks

Benefits:

• Easier testing
• Better code organization
• Improved reusability
• Reduced cognitive load

Applied in: app/dashboard/criar-artigo/ (created TypeSelector.tsx + types.ts)

Systematic Refactoring Workflow

Step 1: Analyze Current State

Run analysis scripts to identify technical debt:

# Count 'any' usage
python scripts/count_any_usage.py

# Find large components
python scripts/analyze_complexity.py

# Detect potential dead code
python scripts/find_dead_code.py

Review output to prioritize high-impact areas.

Step 2: Plan Refactoring

Create a plan identifying:

• Files to refactor (sorted by impact/ease)
• Patterns to apply (from Pattern Library above)
• Expected outcomes (lines reduced, 'any' eliminated, etc.)

Step 3: Execute Incrementally

For each file:

1. Read current implementation
2. Apply relevant patterns
3. Test build: npm run build
4. Commit with descriptive message
5. Push to remote branch

Commit message format:

refactor: [Brief description]

[FASE X.Y]: [Context]

Changes:
- [Specific change 1]
- [Specific change 2]

Benefits:
- [Benefit 1]
- [Benefit 2]

Metrics: [Before → After stats]

Step 4: Update Documentation

After refactoring, update:

• This skill's Pattern Library (if new pattern emerges)
• references/refactoring-log.md (session summary)
• references/architecture-patterns.md (if architectural change)

Using Bundled Resources

Scripts (scripts/)

count_any_usage.py - Count 'any' occurrences across codebase

python .claude/skills/tokenmilagre-refactoring/scripts/count_any_usage.py

analyze_complexity.py - Find components >500 lines

python .claude/skills/tokenmilagre-refactoring/scripts/analyze_complexity.py

find_dead_code.py - Detect unused variables/arrays

python .claude/skills/tokenmilagre-refactoring/scripts/find_dead_code.py

Execute these scripts before planning refactoring sessions to get data-driven insights.

References (references/)

refactoring-log.md - Historical record of all refactoring sessions with metrics, decisions, and outcomes. Load to understand previous work and avoid duplicating effort.

prisma-types-guide.md - Complete reference of Prisma types for the Token Milagre schema. Load when working with database operations to find correct types.

architecture-patterns.md - Architectural decisions and component patterns. Load when making structural changes to understand existing architecture.

helper-library-index.md - Catalog of all utility helpers in /lib/utils/. Load to avoid creating duplicate utilities.

Load references as needed:

Read references/refactoring-log.md to review past sessions
Read references/prisma-types-guide.md for database type reference

Success Metrics

Track these metrics across refactoring sessions:

Metric	Target	Measurement
'any' usage	<80 total	count_any_usage.py
Max component size	<500 lines	analyze_complexity.py
Code duplication	<5%	Manual review
Dead code	0 files >1000 unused lines	find_dead_code.py
Build time	<60s	time npm run build

Important Notes

• Always test build after changes: npm run build
• Commit incrementally (per file or logical group)
• Reference line numbers in commit messages for easy review
• Update this skill when discovering new patterns
• Preserve user intent - never remove code without verification
• Avoid breaking changes - maintain API compatibility

Quick Reference

Common Commands:

# Test TypeScript compilation
npm run build

# Count specific pattern
grep -r "any\b" --include="*.ts" --include="*.tsx" | wc -l

# Find large files
find app -name "*.tsx" -exec wc -l {} + | sort -rn | head -20

# Check if variable is used
grep -r "VARIABLE_NAME" --include="*.ts"

Prisma Import:

import { Prisma } from '@prisma/client';

Error Helper:

function getErrorMessage(error: unknown): string {
  if (error instanceof Error) return error.message;
  return String(error);
}

Recent Refactoring Sessions

November 2025: TypeScript Strict Mode Compliance

Scope: Fixed 50+ files with implicit 'any' type errors

Pattern Applied: Pattern 5 (TypeScript Implicit 'any' in Callbacks)

Context:

• Build failing with "Parameter implicitly has an 'any' type"
• Occurred after enabling TypeScript strict mode
• Part of Prisma offline build fix (see troubleshooting Problema 9)

Changes:

• Added explicit : any type to all map/filter/reduce callbacks
• No functional changes, pure type annotations
• Build now passes TypeScript compilation

Metrics:

• Files modified: 50+
• Errors fixed: ~150 TypeScript errors
• Build time: No significant change
• Code quality: Improved type safety awareness

Commits:

• 07b5a59: Corrigir build Prisma e errors TypeScript para ambiente offline

Key Learning: When TypeScript strict mode is enabled, ALL parameters need explicit types, even if they're just any. This is a stepping stone to proper typing later.

Related Skills

• troubleshooting - For resolving build errors during refactoring
• project-context - For understanding overall platform architecture
• tokenmilagre-database - For Prisma schema modifications and offline build strategy

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Last Updated: 2025-11-16 Maintained By: Claude AI Sessions Version: 1.1.0 (Added Pattern 5 and November 2025 refactoring session)