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fix(core-tools): resolve Jupyter Notebook and JSON corruption in write_file #28000

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fe7d77d
fix(core-tools): resolve Jupyter Notebook and JSON corruption in writ…
amelidev Jun 18, 2026
12a68e4
Update packages/core/src/tools/write-file.ts
amelidev Jun 18, 2026
08559eb
Update packages/core/src/tools/write-file.ts
amelidev Jun 18, 2026
ff8ea46
fix(core-tools): expand write_file JSON/YAML/TOML safe formats per co…
amelidev Jun 18, 2026
09462ef
Update packages/core/src/tools/write-file.ts
amelidev Jun 19, 2026
1a7cb75
Merge branch 'main' into b_446760218
amelidev Jun 19, 2026
aef101b
Merge branch 'main' into b_446760218
amelidev Jun 22, 2026
043016a
fix(core-tools): expand protected config files to include env, lock, …
amelidev Jun 22, 2026
eb66932
Update packages/core/src/tools/write-file.ts
amelidev Jun 22, 2026
58ff7f2
fix(core-tools): safeguard XML, SVG, CSV, HCL, and Terraform files
amelidev Jun 22, 2026
d8f2878
fix(core-tools): resolve code review comments on editCorrector saniti…
amelidev Jun 22, 2026
7e9a1b3
Update packages/core/src/utils/editCorrector.ts
amelidev Jun 22, 2026
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28 changes: 2 additions & 26 deletions package-lock.json
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45 changes: 45 additions & 0 deletions packages/core/src/tools/write-file.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -356,6 +356,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.correctedContent).toBe(correctedContent);
expect(result.originalContent).toBe('');
Expand Down Expand Up @@ -389,9 +390,46 @@ describe('WriteFileTool', () => {
abortSignal,
true,
false, // aggressiveUnescape
false, // isJsonLike
);
});

it('should set isJsonLike to true and aggressiveUnescape to false for .ipynb, .json, map, yaml, toml, and common JSON-based dotfiles', async () => {
const abortSignal = new AbortController().signal;
const filesToTest = [
'notebook.ipynb',
'data.json',
'bundle.js.map',
'workflow.yaml',
'config.yml',
'Cargo.toml',
'.eslintrc',
'.prettierrc',
];
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amelidev marked this conversation as resolved.
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amelidev marked this conversation as resolved.
Comment on lines +397 to +422

@gemini-code-assist gemini-code-assist Bot Jun 22, 2026

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high

We should update the test suite to verify that the newly added structured formats (XML, SVG, CSV, TSV, Terraform/HCL, Terraform state, and Web App Manifests) are also correctly identified as isJsonLike and bypass aggressive unescaping.

    it('should set isJsonLike to true and aggressiveUnescape to false for .ipynb, .json, map, yaml, toml, and common JSON-based dotfiles', async () => {
      const abortSignal = new AbortController().signal;
      const filesToTest = [
        'notebook.ipynb',
        'data.json',
        'bundle.js.map',
        'workflow.yaml',
        'config.yml',
        'Cargo.toml',
        '.eslintrc',
        '.prettierrc',
        '.env',
        '.env.local',
        'config.ini',
        '.gitconfig',
        'data.xml',
        'image.svg',
        'data.csv',
        'data.tsv',
        'main.tf',
        'terraform.tfvars',
        'config.hcl',
        'terraform.tfstate',
        'manifest.webmanifest',
      ];


for (const file of filesToTest) {
mockEnsureCorrectFileContent.mockClear();
mockEnsureCorrectFileContent.mockResolvedValue('content');

const filePath = path.join(rootDir, file);
await getCorrectedFileContent(
mockConfig,
filePath,
'content',
abortSignal,
);

expect(mockEnsureCorrectFileContent).toHaveBeenCalledWith(
'content',
mockBaseLlmClientInstance,
abortSignal,
true,
false, // aggressiveUnescape
true, // isJsonLike
);
}
});

it('should call ensureCorrectFileContent for an existing file', async () => {
const filePath = path.join(rootDir, 'existing_corrected_file.txt');
const originalContent = 'Original existing content.';
Expand All @@ -416,6 +454,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.correctedContent).toBe(correctedProposedContent);
expect(result.originalContent).toBe(originalContent);
Expand Down Expand Up @@ -493,6 +532,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(confirmation).toEqual(
expect.objectContaining({
Expand Down Expand Up @@ -531,6 +571,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(confirmation).toEqual(
expect.objectContaining({
Expand Down Expand Up @@ -737,6 +778,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.llmContent).toMatch(
/Successfully created and wrote to new file/,
Expand Down Expand Up @@ -782,6 +824,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.llmContent).toMatch(/Successfully overwrote file/);
const writtenContent = await fsService.readTextFile(filePath);
Expand Down Expand Up @@ -1052,6 +1095,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.correctedContent).toBe(proposedContent);
expect(result.fileExists).toBe(false);
Expand Down Expand Up @@ -1080,6 +1124,7 @@ describe('WriteFileTool', () => {
abortSignal,
true,
true, // aggressiveUnescape
false, // isJsonLike
);
expect(result.correctedContent).toBe(proposedContent);
expect(result.originalContent).toBe(originalContent);
Expand Down
25 changes: 24 additions & 1 deletion packages/core/src/tools/write-file.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -131,14 +131,37 @@ export async function getCorrectedFileContent(
}
}

const aggressiveUnescape = !isGemini3Model(config.getActiveModel());
const fileExtension = path.extname(filePath).toLowerCase();
const fileName = path.basename(filePath).toLowerCase();

const isJsonLike =
fileExtension.includes('json') ||
fileExtension === '.ipynb' ||
fileExtension === '.map' ||
fileExtension === '.yaml' ||
fileExtension === '.yml' ||
fileExtension === '.toml' ||
fileExtension === '.lock' ||
[
'.eslintrc',
'.babelrc',
'.prettierrc',
'.stylelintrc',
'.watchmanconfig',
'.nycrc',
'.releaserc',
].includes(fileName);
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amelidev marked this conversation as resolved.
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amelidev marked this conversation as resolved.
Comment on lines +137 to +175

@gemini-code-assist gemini-code-assist Bot Jun 22, 2026

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high

To prevent silent corruption of other highly structured data and configuration formats, we should expand the isJsonLike check to cover additional common formats such as XML, SVG, CSV, TSV, Terraform/HCL (.tf, .tfvars, .hcl), Terraform state (.tfstate), and Web App Manifests (.webmanifest). These formats are equally vulnerable to aggressive unescaping corruption (e.g., breaking escaped quotes in CSV/TSV or XML attributes).

  const isJsonLike =
    fileExtension.includes('json') ||
    fileExtension === '.ipynb' ||
    fileExtension === '.map' ||
    fileExtension === '.yaml' ||
    fileExtension === '.yml' ||
    fileExtension === '.toml' ||
    fileExtension === '.lock' ||
    fileExtension === '.ini' ||
    fileExtension === '.properties' ||
    fileExtension === '.cfg' ||
    fileExtension === '.conf' ||
    fileExtension === '.config' ||
    fileExtension === '.xml' ||
    fileExtension === '.svg' ||
    fileExtension === '.csv' ||
    fileExtension === '.tsv' ||
    fileExtension === '.tf' ||
    fileExtension === '.tfvars' ||
    fileExtension === '.hcl' ||
    fileExtension === '.tfstate' ||
    fileExtension === '.webmanifest' ||
    fileName.startsWith('.env') ||
    [
      '.eslintrc',
      '.babelrc',
      '.prettierrc',
      '.stylelintrc',
      '.watchmanconfig',
      '.nycrc',
      '.releaserc',
      '.gitconfig',
      '.editorconfig',
      '.npmrc',
      '.yarnrc',
      '.jshintrc',
      '.markdownlintrc',
    ].includes(fileName);


const aggressiveUnescape =
!isJsonLike && !isGemini3Model(config.getActiveModel());

correctedContent = await ensureCorrectFileContent(
proposedContent,
config.getBaseLlmClient(),
abortSignal,
config.getDisableLLMCorrection(),
aggressiveUnescape,
isJsonLike,
);

return { originalContent, correctedContent, fileExists };
Expand Down
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