# Stop Wasting Your LLM Context Window: A Practical Strategy

> Source: <https://dev.to/learnairesource/stop-wasting-your-llm-context-window-a-practical-strategy-1lgm>
> Published: 2026-07-17 15:00:41+00:00

You've got 200k tokens. So why do you keep running out of room halfway through your API call?

Most developers treat context like a gas tank—fill it up and hope you don't run empty. That's the wrong mental model. Context is inventory. You need to *manage* it.

Here's what actually works.

You throw your whole codebase at Claude. You paste the 500-line file. You include the error trace, the full conversation history, and the docs. Then you're surprised when the model says "sorry, I'm out of space."

But it's not about space—it's about signal-to-noise.

A 200k token context window looks huge until you realize:

You're not running out of context. You're drowning in it.

Start with this:

**Tier 1: The Essentials (10-20% of context)**

**Tier 2: Reference (20-30% of context)**

**Tier 3: Archive (optional, 30-50%)**

Rule: **Start at Tier 1. Only move up if the model says "I need X to help."**

**Option 1: Cursor-style context picker**

If you're using Cursor or Claude in your IDE, use the @-symbol to tag only what matters. Don't include your entire project—select the 3-4 files you're actually working on.

**Option 2: Context manifesto (my preference)**

Create a `.context`

file in your repo:

```
# CONTEXT.md
## This PR is about
[1-2 sentences]

## Files that matter
- src/auth/login.ts — where the bug is
- src/types/user.ts — User type definition
- tests/auth.test.ts — relevant test

## Recent context
[Last 3-5 messages from your conversation, not the whole history]

## To understand this, you need to know
- We use bcrypt for password hashing
- Sessions are JWT-based
- Tests run in Jest with supertest
```

Then just paste the context file + your active files.

**Full context is worth it when:**

**Full context is a waste when:**

I was debugging a React state issue. Bad approach:

```
Here's my entire src folder (42 files, 40k tokens):
[entire src dump]

Why is my form state not updating?
```

Good approach:

```
Component: UserForm.tsx (handles user profile updates)
Issue: Form fields don't update when user data loads
Relevant code:
- useEffect hook (lines 15-23) that should trigger
- setState call (line 42)
- Form input onChange (line 55)

Current behavior: Form shows stale data
Expected: Form updates within 500ms of data load

Here's the component:
[just the component, 120 lines]

What am I missing?
```

The model found the issue in 10 seconds: missing dependency in the useEffect array. With the full folder dump, it would've taken longer and used 10x more tokens.

Think like you're on a 100MB bandwidth limit (even if you're not).

Treat context like you treat production deploys. Be intentional. Be minimal. Be clear about what matters.

Next time you hit a "context limit exceeded" or "I need more space" error, don't just upgrade to a bigger model. Actually look at what you're sending.

Can you remove:

Usually you'll cut it by 50% and the model will actually perform better.

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