Why Does Claude Give Me Bad Code? (And How to Actually Use Claude Code)

I hear this one constantly: "I'm paying for Claude, I'm using Claude Code in VS Code, and it gives me wrong code, loops in circles, makes up package versions I'm not using, and takes forever to answer simple questions — sometimes with nothing to show for it. What am I doing wrong?"

Here's the honest truth: it's almost never the model, and it's almost never you being dumb. It's a context problem. Claude is incredible when it knows what it's working with, and it guesses badly when it doesn't. Once you fix how you feed it information, the wrong code, the loops, and the wasted time mostly disappear. Let me show you exactly how I use it.

Why it gives you wrong code (and hallucinated package versions)

When Claude doesn't know your exact setup, it fills the gaps with the most common patterns from its training. That's where the "wrong version of the package" problem comes from — it's guessing at versions because you never told it which ones you have.

The fix:

• Give it your dependencies up front. Paste your package.json (or requirements.txt) at the start, or in Claude Code let it read the file directly. Then say: "Only use the versions in this project."
• Tell it your stack in one line. "This is a React 18 + Vite + Tailwind project" removes a huge amount of guessing.
• Let it see real files, not your description of them. In Claude Code, the whole point is it can read your actual code. Tell it which file to look at instead of explaining the file from memory.

Why it loops in circles

Looping — where it keeps "fixing" the same thing and never gets there — almost always means one of two things: the conversation has gotten cluttered with conflicting attempts, or it's guessing at an error it can't actually see.

The fix:

• Start a fresh session. When a thread gets long and messy, the clutter works against you. Open a clean session, state the goal in one or two sentences, and paste only what matters.
• Paste the exact error. Don't say "it's not working." Copy the real error message and the relevant snippet. A precise error breaks a loop fast.
• Make it slow down. Ask: "Before you change anything, tell me what you think is wrong and your plan." Catching a wrong assumption before it writes code saves three rounds of looping.

Why Claude Code feels painfully slow

Claude Code gets slow when it's hunting through a big project, asking permission at every step, or chewing on a vague, oversized request. It's not broken — it's wandering because the task wasn't scoped.

The fix:

• Scope it small. "Fix the login button's spacing in Header.jsx" returns fast. "Improve my website" makes it crawl through everything.
• Point it at the file. Naming the file means it doesn't have to search your whole project to find it.
• Use plan mode for bigger jobs. Let it lay out a plan first, approve it, then let it execute. You get fewer wrong turns.
• Add a project context file. A CLAUDE.md in your project that describes your stack, conventions, and key files means you stop re-explaining the basics every session.

The workflow I actually use

Here's the simple loop that turns Claude from frustrating into a genuine teammate:

1. Set the stage once. Tell it the stack, paste/point to dependencies, and (in Claude Code) keep a CLAUDE.md so it always has context.
2. Ask for one thing. One clear, specific change at a time — not five.
3. Make it plan before it codes on anything non-trivial.
4. Feed it real errors, not descriptions, when something breaks.
5. Reset when it drifts. Fresh session, restate the goal, continue. Don't fight a cluttered thread.