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common-pitfalls

Orchestrates pitfall prevention skills for common development issues. Auto-triggered during code review to check for TanStack Query, Drizzle ORM, Express API, React, WebSocket, blockchain RPC, and security pitfalls.

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Common Pitfalls Prevention

Orchestrates specialized pitfall prevention skills learned from production issues. Use during code review to automatically check for common mistakes.

When to Use

  • During code review (auto-triggered by full-review skill)
  • Before committing changes
  • When debugging production issues
  • Reviewing unfamiliar code patterns

Workflow

Step 1: Identify Code Categories

Based on changed files, determine which sub-skills to invoke:

| File Pattern | Sub-Skill | |-------------|-----------| | /hooks/, useQuery, useMutation | pitfalls-tanstack-query | | /db/, schema.ts, drizzle | pitfalls-drizzle-orm | | /routes/, router., app. | pitfalls-express-api | | /components/, /pages/, .tsx | pitfalls-react | | websocket, wss, ws. | pitfalls-websocket | | contract, rpc, multicall, gas | pitfalls-blockchain | | session, key, cache, log | pitfalls-security |

Step 2: Invoke Relevant Sub-Skills

For each category found, invoke the corresponding skill for detailed patterns.

Step 3: Generate Combined Report

Aggregate findings from all invoked sub-skills.

Sub-Skills Reference

| Skill | Focus Area | |-------|------------| | pitfalls-tanstack-query | Query keys, invalidation, v5 patterns | | pitfalls-drizzle-orm | Schema types, migrations, array columns | | pitfalls-express-api | Routes, status codes, storage patterns | | pitfalls-react | Components, forms, a11y, responsive | | pitfalls-websocket | Server setup, heartbeat, reconnection | | pitfalls-blockchain | RPC errors, gas, multicall, nonces | | pitfalls-security | Session keys, caching, logging, secrets |

Quick Reference Checklist

Core

  • [ ] TanStack Query keys use full URL paths
  • [ ] Mutations invalidate relevant queries
  • [ ] Drizzle types exported for all models
  • [ ] API routes return correct status codes
  • [ ] All RPC calls wrapped in try/catch
  • [ ] WebSocket has heartbeat/reconnection
  • [ ] React components handle loading/error states
  • [ ] No secrets in logs or frontend code

Type Safety

  • [ ] No any types - use unknown and narrow
  • [ ] Types inferred from schema ($inferSelect, z.infer)
  • [ ] Type guards for runtime validation

Financial

  • [ ] BigInt for all token amounts
  • [ ] Decimal.js for price calculations
  • [ ] Proper rounding (floor/ceil)

Blockchain

  • [ ] Gas estimation with buffer
  • [ ] EIP-1559 gas pricing
  • [ ] Transaction simulation before send
  • [ ] Multicall uses allowFailure: true

Security

  • [ ] Session keys have expiry and limits
  • [ ] AES-256-GCM for stored credentials
  • [ ] Audit logging for sensitive operations
  • [ ] Rate limiting with exponential backoff
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