Update src/core/prompts/system.ts

Co-authored-by: ellipsis-dev[bot] <65095814+ellipsis-dev[bot]@users.noreply.github.com>

.changeset/big-maps-kick.md

@@ -0,0 +1,5 @@
+---
+"claude-dev": patch
+---
+
+fix prompt for claude 4 family diff edits

src/core/prompts/system.ts

@@ -605,6 +605,8 @@ ${
 3. Once the file has been edited with either write_to_file or replace_in_file, the system will provide you with the final state of the modified file. Use this updated content as the reference point for any subsequent SEARCH/REPLACE operations, since it reflects any auto-formatting or user-applied changes.
 4. All edits are applied in sequence, in the order they are provided
 5. All edits must be valid for the operation to succeed - if any edit fails, none will be applied
+6. Do not make more than 4 replacements in a single replace_in_file call, as this can lead to errors and make it difficult to track changes. If you need to make more than 4 changes, consider breaking them into multiple replace_in_file calls.
+7. Make sure a single old_str in a replace_in_file call is no more than 4 lines, as too many lines can lead to errors. If you need to replace a larger section, break it into smaller blocks.
 
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 		: `