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Sangmin Lee
Sangmin Lee

Posted on • Originally published at claudeguide.io

30 Claude Code Tips from Power Users (2026)

Originally published at claudeguide.io/claude-code-tips-from-power-users

30 Claude Code Tips from Power Users (2026)

Developers who ship with Claude Code daily have converged on a set of patterns that go well beyond the defaults. These 30 tips cover the full stack: CLAUDE.md structure, workflow habits, prompt engineering, cost management, and debugging. Apply even 5 of these and you'll notice a measurable difference in quality and speed.

Category 1: CLAUDE.md Tips

Your CLAUDE.md file is Claude's persistent context for your project. Most developers underinvest here — a well-crafted file is worth 10× more than any single clever prompt.

Tip 1: Add an ASCII architecture diagram

Claude reasons better about your codebase when it can see the structure at a glance. An ASCII diagram takes 10 minutes to write and pays dividends in every session.

## Architecture

\`\`\`
┌─────────────┐     ┌──────────────┐     ┌─────────────┐
│   Next.js   │────▶│  FastAPI     │────▶│  Postgres   │
│   (Vercel)  │     │  (Railway)   │     │  (Supabase) │
└─────────────┘     └──────────────┘     └─────────────┘
       │                    │
       ▼                    ▼
  Clerk Auth           Redis Cache
\`\`\`
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Tip 2: Include explicit "never do" rules

Negative constraints are more effective than positive ones. Claude will reliably avoid the things you explicitly forbid.

## Rules

**Never:**
- Never add `console.log` statements in production code
- Never use `any` in TypeScript
- Never modify `schema.prisma` without explicit instruction
- Never install new npm packages without asking first
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Tip 3: Use per-directory CLAUDE.md files in monorepos

Claude reads the CLAUDE.md in the current working directory and all parent directories. In a monorepo, put a root-level CLAUDE.md for global rules and service-specific files inside each package:

/CLAUDE.md          ← global rules, architecture overview
/packages/api/CLAUDE.md   ← API-specific conventions, env vars
/packages/web/CLAUDE.md   ← frontend conventions, component patterns
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Claude merges all of them — more specific files override more general ones for conflicting instructions.

Tip 4: Document your testing conventions explicitly

Instead of hoping Claude guesses your test framework:

## Testing

- Unit tests: Vitest, files named `*.test.ts` co-located with source
- Integration tests: `/tests/integration/`, uses real database (TEST_DATABASE_URL)
- E2E: Playwright, `/tests/e2e/`
- Run with: `npm test` (unit), `npm run test:int` (integration)
- Always write tests alongside implementation — never open a PR without tests
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Tip 5: List the env vars Claude will need

Nothing slows a session down like Claude guessing environment variable names. Add a non-secret reference list:

## Environment Variables

Required (set in .env.local):
- DATABASE_URL — Postgres connection string
- REDIS_URL — Redis connection
- ANTHROPIC_API_KEY — Claude API key
- CLERK_SECRET_KEY — Auth secret
- NEXT_PUBLIC_CLERK_PUBLISHABLE_KEY — Public auth key

See `.env.example` for format.
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Tip 6: Add a "current sprint" section and update it weekly

The highest-signal context you can give Claude is what you're actively building. A "Current Sprint" section at the top of CLAUDE.md keeps Claude focused:

## Current Sprint (week of 2026-04-21)

Working on: user onboarding flow
- [ ] Email verification step
- [ ] Billing setup wizard (Stripe)
- [ ] First-run tutorial component

Recently shipped: auth refactor (Clerk), rate limiting (Redis)
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Category 2: Workflow Tips

Tip 7: Use /compact before complex tasks

Claude Code's context window fills up during long sessions. Running /compact before starting a major feature compresses the conversation history into a dense summary, freeing tokens for the actual work. Do this proactively when the session goes past 30–40 messages.

Tip 8: Give Claude a "budget" in the prompt

For exploratory tasks where you're not sure of scope, give Claude explicit bounds:

300 copy-paste-ready prompts for the most common Claude Code tasks — organized by category (debugging, refactoring, testing, architecture, documentation) with context variables for your specific stack.

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