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bug(core): Prompt engineering for truncated read_file. (#5161)

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This commit is contained in:
joshualitt
2025-08-06 13:52:04 -07:00
committed by GitHub
parent ad5d2af4e3
commit 43510ed212
6 changed files with 77 additions and 36 deletions
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11
packages/core/src/utils/fileUtils.test.ts
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@@ -420,10 +420,7 @@ describe('fileUtils', () => {
); // Read lines 6-10
const expectedContent = lines.slice(5, 10).join('\n');
expect(result.llmContent).toContain(expectedContent);
expect(result.llmContent).toContain(
'[File content truncated: showing lines 6-10 of 20 total lines. Use offset/limit parameters to view more.]',
);
expect(result.llmContent).toBe(expectedContent);
expect(result.returnDisplay).toBe('Read lines 6-10 of 20 from test.txt');
expect(result.isTruncated).toBe(true);
expect(result.originalLineCount).toBe(20);
@@ -444,9 +441,6 @@ describe('fileUtils', () => {
const expectedContent = lines.slice(10, 20).join('\n');
expect(result.llmContent).toContain(expectedContent);
expect(result.llmContent).toContain(
'[File content truncated: showing lines 11-20 of 20 total lines. Use offset/limit parameters to view more.]',
);
expect(result.returnDisplay).toBe('Read lines 11-20 of 20 from test.txt');
expect(result.isTruncated).toBe(true); // This is the key check for the bug
expect(result.originalLineCount).toBe(20);
@@ -489,9 +483,6 @@ describe('fileUtils', () => {
longLine.substring(0, 2000) + '... [truncated]',
);
expect(result.llmContent).toContain('Another short line');
expect(result.llmContent).toContain(
'[File content partially truncated: some lines exceeded maximum length of 2000 characters.]',
);
expect(result.returnDisplay).toBe(
'Read all 3 lines from test.txt (some lines were shortened)',
);

11
packages/core/src/utils/fileUtils.ts
View File

@@ -303,14 +303,7 @@ export async function processSingleFileContent(
const contentRangeTruncated =
startLine > 0 || endLine < originalLineCount;
const isTruncated = contentRangeTruncated || linesWereTruncatedInLength;
let llmTextContent = '';
if (contentRangeTruncated) {
llmTextContent += `[File content truncated: showing lines ${actualStartLine + 1}-${endLine} of ${originalLineCount} total lines. Use offset/limit parameters to view more.]\n`;
} else if (linesWereTruncatedInLength) {
llmTextContent += `[File content partially truncated: some lines exceeded maximum length of ${MAX_LINE_LENGTH_TEXT_FILE} characters.]\n`;
}
llmTextContent += formattedLines.join('\n');
const llmContent = formattedLines.join('\n');
// By default, return nothing to streamline the common case of a successful read_file.
let returnDisplay = '';
@@ -326,7 +319,7 @@ export async function processSingleFileContent(
}
return {
llmContent: llmTextContent,
llmContent,
returnDisplay,
isTruncated,
originalLineCount,