Edit

Performs targeted modifications to existing files using string replacement.

Runtime Comparison

Aspect	Claude Code	Opencode
Tool name	Edit	edit
Mechanism	String replacement	String replacement
Multi-edit	No (one replacement per call)	No (one replacement per call)
Pre-read requirement	Yes	Yes
Replace all	replace_all parameter	No

Edit modifies specific strings in a file without touching the rest. The old_string must be unique in the file, so include surrounding context to guarantee a match.

Opencode also provides a patch tool for multi-location edits in one operation.