File Viewer

The REPL includes a full-screen file viewer with syntax highlighting, accessible via the /view command.

Usage

> /view <filepath>

Examples:

> /view src/main.py
> /view README.md
> /view config/settings.json

Features

Syntax Highlighting

Files are highlighted based on their extension using Pygments. Supports 100+ programming languages including:

• Python, JavaScript, TypeScript

• Rust, Go, C, C++

• HTML, CSS, JSON, YAML

• Markdown, reStructuredText

• And many more

Line Numbers

Lines are numbered for easy reference when discussing code with the agent.

Smooth Navigation

Navigate large files efficiently with vim-style keys.

Multiple Encodings

Handles UTF-8, Latin-1, and other common encodings.

Navigation

Key	Action
j or ↓	Scroll down one line
k or ↑	Scroll up one line
Space or Ctrl+F	Page down
Ctrl+B	Page up
g	Jump to beginning of file
G	Jump to end of file
q or Esc	Exit viewer and return to REPL

Tips

Quick Code Review

Use /view to inspect files before asking the agent to modify them:

> /view src/api.py
(review the code)
> Please add error handling to the fetch_data function

Comparing Changes

After the agent makes changes, view the file to verify:

> Edit src/api.py to add logging
(agent makes changes)
> /view src/api.py
(verify the changes)

Large Files

For very large files, use g and G to quickly jump between beginning and end.

Programmatic Access

The file viewer can also be used programmatically:

from pantheon.repl.viewers import FileViewer

async def view_file(path: str):
    viewer = FileViewer()
    await viewer.view(path)