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# [Powerlevel10k+Oh-My-Zsh] How to Fix Cursor Agent Terminal Output Truncation and Formatting Issues
- URL: https://sanghunkang.com/powerlevel10k-oh-my-zsh-how-to-fix-cursor-agent-terminal-output-truncation-and-formatting-issues-en/
- Published: 2025-09-15T04:34:26.000Z
- Updated: 2025-09-15T04:34:26.000Z
- Author: Sanghun Kang
- Tags: dev, #en, #multi, cursor, ai

# \[Powerlevel10k+Oh-My-Zsh\] How to Fix Cursor Agent Terminal Output Truncation and Formatting Issues

**⚠️ Must-read for Powerlevel10k/Powerlevel9k users!**

If you're using Powerlevel10k or Powerlevel9k themes, you're likely experiencing command completion detection issues when working with Cursor AI Assistant in terminal tasks. Cursor's official documentation explicitly mentions this problem, and **using the `CURSOR_AGENT` environment variable is the only official solution**.

## 🐛 Issue Description & Root Cause - Official Documentation

Cursor's official documentation clearly explains the cause of this problem:

> **"Some shell themes (for example, Powerlevel9k/Powerlevel10k) can interfere with the inline terminal output. If your command output looks truncated or misformatted, disable the theme or switch to a simpler prompt when Agent runs."**

**Problem Flow:**

```
Cursor AI → run_terminal_cmd → Shell Process → Command Execution
    ↑                                          ↓
Manual Skip ←←←← Hangs Here ←←←← Output + New Prompt

```

**What Actually Happens:**

1. ✅ Commands execute successfully
2. ✅ Output is displayed (but may be truncated or misformatted)
3. ✅ New shell prompt appears
4. ❌ **Cursor hangs indefinitely at "Running terminal command..."**
5. 🖱️ Users must manually click the "Skip" button every time

**Root Cause:**

- **Powerlevel9k/Powerlevel10k interferes with inline terminal output**
- Complex prompt rendering conflicts with Cursor's command completion detection mechanism
- Terminal output gets truncated or misformatted, preventing the Agent from parsing completion signals

## ✅ Solution - Official Cursor Recommendation (Only Solution)

The **only official solution** provided by Cursor:

> **"Disable heavy prompts for Agent sessions"** 
> **"Use the `CURSOR_AGENT` environment variable in your shell config to detect when the Agent is running and skip initializing fancy prompts/themes."**

**Important:** The only official solution provided by Cursor is using the `CURSOR_AGENT` environment variable.

### Configuration for Powerlevel10k Users

Add the following code to your `.zshrc` file:

```bash
# ~/.zshrc — disable Powerlevel10k when Cursor Agent runs
if [[ -n "$CURSOR_AGENT" ]]; then
  # Skip theme initialization for better compatibility
else
  [[ -r ~/.p10k.zsh ]] && source ~/.p10k.zsh
fi
```

## 🛠️ My Working Solution - Oh-My-Zsh + Powerlevel10k Combination

**Problem Encountered:** When applying the official solution as-is, environments using oh-my-zsh with Powerlevel10k had issues where themes wouldn't load properly even in regular terminals. All terminals would revert to basic appearance.

**Solution Found:** Adding the oh-my-zsh initialization line made everything work perfectly.

```bash
# Improved configuration for Oh-My-Zsh + Powerlevel10k users
if [[ -n "$CURSOR_AGENT" ]]; then
  # Agent session: Skip theme initialization for better compatibility
else
  # Regular session: Load Oh-My-Zsh and Powerlevel10k normally
  source $ZSH/oh-my-zsh.sh
  [[ -r ~/.p10k.zsh ]] && source ~/.p10k.zsh
fi

```

**Key Points:**

- The `source $ZSH/oh-my-zsh.sh` line ensures oh-my-zsh initializes properly
- Agent terminals still have all complex themes disabled
- Regular terminals work perfectly with oh-my-zsh and Powerlevel10k

**This method is recommended for Oh-My-Zsh + Powerlevel10k combination users!**

## Conclusion

Using Cursor's official solution with the `CURSOR_AGENT` environment variable can perfectly resolve this problem.

**This is the only official solution provided by Cursor**. (2025.09)

# References

- [https://docs.cursor.com/en/agent/terminal](https://docs.cursor.com/en/agent/terminal?ref=sanghun.xyz)
- [https://github.com/cursor/cursor/issues/3165](https://github.com/cursor/cursor/issues/3165?ref=sanghun.xyz)
- [https://github.com/cursor/cursor/issues/3215](https://github.com/cursor/cursor/issues/3215?ref=sanghun.xyz)