p0 can create new files and make precise edits to existing ones, showing every change as a syntax-highlighted diff so you can verify exactly what changed.
The Edit tool makes targeted edits to existing files:
- Find and replace: The AI specifies the exact text to find and what to replace it with
- Syntax-highlighted diff: Changes are shown with Shiki syntax highlighting in the file’s language
- Line counts: The header displays +/- line counts (e.g., “+5 -2” means 5 lines added, 2 removed)
- Clickable filename: Click the filename to open the full diff in the sidebar
The Edit tool is precise — the AI must match the exact text to replace, ensuring edits happen exactly where intended.
The Write tool creates new files or replaces entire file contents:
- New files: Create files that don’t exist yet
- Full replacements: Replace the entire contents of an existing file
- Path display: Shows the full file path and content preview
Use Write for new files, Edit for targeted changes to existing files.
Diff preview
Every edit shows a before/after diff:
- Green highlighting: Added lines and characters
- Red highlighting: Removed lines and characters
- Context lines: Unchanged lines around the edit for context
- Inline changes: Character-level diffs show exactly what changed within a line
This visual feedback lets you verify changes before accepting them.
Notebook editing
The NotebookEdit tool works with Jupyter notebooks:
- Cell-level edits: Replace, insert, or delete individual cells
- Code and markdown: Supports both code and markdown cells
- Cell IDs: Target specific cells by their ID
Notebooks are stored as JSON, but NotebookEdit abstracts away the complexity.
Click any filename in a tool call to see the full file diff in the sidebar. This is especially useful for understanding edits in context.
