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Soften str_replace instructions for weaker LLMs #4639

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tlongwell-block merged 1 commit into from
Sep 15, 2025
Merged

Soften str_replace instructions for weaker LLMs #4639

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18 changes: 10 additions & 8 deletions crates/goose-mcp/src/developer/rmcp_developer.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -264,11 +264,12 @@ impl ServerHandler for DeveloperServer {
To use the insert command, you must specify both `insert_line` (the line number after which to insert, 0 for beginning, -1 for end)
and `new_str` (the text to insert).

To use the str_replace command, ALWAYS use the `diff` parameter with a unified diff for one or more files.
Not using the `diff` parameter with str_replace is an error. With `diff`, `path` should be directory
To use the str_replace command to edit multiple files, use the `diff` parameter with a unified diff.
To use the str_replace command to edit one file, you must specify both `old_str` and `new_str` - the `old_str` needs to exactly match one
unique section of the original file, including any whitespace. Make sure to include enough context that the match is not
ambiguous. The entire original string will be replaced with `new_str`

Always batch file edits together by using a multi-file unified `diff` within a single str_replace tool call.
Not batching file edits using `diff` is an error and wastes context, time, and inference.
When possible, batch file edits together by using a multi-file unified `diff` within a single str_replace tool call.

{}

Expand All @@ -290,11 +291,12 @@ impl ServerHandler for DeveloperServer {
To use the write command, you must specify `file_text` which will become the new content of the file. Be careful with
existing files! This is a full overwrite, so you must include everything - not just sections you are modifying.

To use the str_replace command, ALWAYS use the `diff` parameter with a unified diff for one or more files.
Not using the `diff` parameter with str_replace is an error. With `diff`, `path` should be directory
To use the str_replace command to edit multiple files, use the `diff` parameter with a unified diff.
To use the str_replace command to edit one file, you must specify both `old_str` and `new_str` - the `old_str` needs to exactly match one
unique section of the original file, including any whitespace. Make sure to include enough context that the match is not
ambiguous. The entire original string will be replaced with `new_str`

Always batch file edits together by using a multi-file unified `diff` within a single str_replace tool call.
Not batching file edits using `diff` is an error and wastes context, time, and inference.
When possible, batch file edits together by using a multi-file unified `diff` within a single str_replace tool call.

To use the insert command, you must specify both `insert_line` (the line number after which to insert, 0 for beginning, -1 for end)
and `new_str` (the text to insert).
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