5 Rules Every Claude Code User Should Follow

When working on large projects with Claude Code, one of the biggest challenges is managing the context window.

As a coding session becomes longer, more files, instructions, conversations, tool outputs, and debugging information are added to the context. Eventually, the available context starts becoming limited, which can affect how effectively Claude understands the project.

A few simple habits can make long coding sessions much more reliable.

1. Write Everything Important in CLAUDE.md

The most important project rules should be written inside CLAUDE.md.

This file can contain coding conventions, project architecture, important commands, restrictions, preferred libraries, and instructions that Claude should consistently follow.

Do not depend entirely on instructions written hundreds of messages earlier in the conversation. Important information should live in the project documentation so it can remain available across sessions.

If a rule matters, write it down.

2. Run /context Regularly

Use the /context command to understand how much of the available context is being used.

This becomes especially useful during long development sessions involving multiple files, debugging, planning, and repeated code changes.

Instead of waiting until the session becomes difficult to manage, periodically check the context usage and decide whether it is time to start fresh.

3. Exit Around 80% Usage

Once the context becomes heavily utilized, continuing to add more information is not always productive.

A useful habit is to treat around 80% context usage as a warning point. Instead of pushing the same session until it becomes overloaded, finish the current logical task, save the important information, and start a new Claude Code session.

This is particularly useful for complex multi-file projects where Claude needs to understand a large amount of code.

4. Use /compact Manually

Claude Code can automatically compact the conversation when the context becomes full, but you can also trigger compaction manually.

Running /compact yourself before the automatic process starts gives you more control over when the conversation is summarized.

It can be useful after completing a major part of a task, especially when the previous discussion contains a lot of debugging output or intermediate information that is no longer important.

5. Break Large Tasks Into Smaller Sessions

Trying to complete an entire large project inside one continuous conversation is usually unnecessary.

Instead, divide the work into smaller phases.

For example:

* Analyze the existing architecture

* Implement the backend

* Build the frontend

* Add authentication

* Test the application

* Fix bugs

* Review and optimize

Complete one logical phase, document anything important, and then start a fresh session for the next phase.

This keeps the context focused and makes it easier for Claude to understand what matters at each stage.

The key idea is simple: do not treat the context window as unlimited memory.

Context is a resource that needs to be managed.

Keep permanent instructions in CLAUDE.md, monitor usage with /context, compact conversations when necessary, and divide large development tasks into focused sessions.

These habits become increasingly important as projects grow. The larger the codebase and the more complex the task, the more valuable good context management becomes.