500 "Failed to parse tool call arguments as JSON" when Continue creates a Markdown file with tool calls

[Yuimi062]

Environment

• Continue extension: continue.continue-1.3.38
• VS Code: Windows, Electron build
• OS: Windows x64
• Provider: OpenAI-compatible endpoint
• Model config shown in log:
  • model: qwen35-9b-q4-mtp
  • provider: openai
  • useOpenAIAdapter: true
  • streamEnabled: true
  • templateMessages: false

Problem

When asking Continue to generate/create a Markdown file, the request fails with:

500 Failed to parse tool call arguments as JSON:
[json.exception.parse_error.101] parse error at line 1, column 6767:
syntax error while parsing value - invalid string: missing closing quote

The failure appears during llm/streamChat while Continue is using built-in tools such as create_new_file.
The prompt I submitted to Continue was:

Create a file named `test.md` in the current workspace and generate a test text using various Markdown formats. The text should be longer than 1,000 lines.

Generated Markdown content

The generated .md content was very long, so I am putting it in a collapsible block.

Generated test.md content excerpt

Comprehensive Markdown Test Document

Table of Contents

1. Headings
2. Text Formatting
3. Lists
4. Code Blocks
5. Tables
6. Links and Images
7. Blockquotes
8. Horizontal Rules
9. Task Lists
10. Details and Summaries

Headings

Level 3 Heading

This is a level 3 heading with some text.

Level 4 Heading

This is a level 4 heading with some text.

Level 5 Heading

This is a level 5 heading with some text.

Level 6 Heading

This is a level 6 heading with some text.

Text Formatting

Bold text - This text is bold.

Italic text - This text is italic.

Strikethrough text - This text is strikethrough.

Inline code - This is inline code.

Deleted text - This text appears deleted.

This is a blockquote.
It can span multiple lines.
And it can have different formatting styles.

Lists

Unordered Lists

• First item
• Second item
• Third item
  • Nested item 1
  • Nested item 2
    • Deeply nested item

Ordered Lists

1. First ordered item
2. Second ordered item
3. Third ordered item
   1. Nested ordered item 1
   2. Nested ordered item 2

Definition Lists

Term 1
: Definition for term 1.

Term 2
: Definition for term 2.

Code Blocks

Fenced Code Block (Language Specified)

def hello_world():
    print("Hello, World!")

if __name__ == "__main__":
    hello_world()

Fenced Code Block (No Language)

This is a code block without a specified language.
It will be rendered as plain text.

Fenced Code Block (With Comments)

// This is a JavaScript file
function calculateSum(a, b) {
    // Add two numbers
    return a + b;
}

// Export the function
module.exports = calculateSum;

Indented Code Block

This is an indented code block.
It uses 4 spaces for indentation.
Each line must be indented by 4 spaces.

Tables

Basic Table

Column 1	Column 2	Column 3
Value A	Value B	Value C
Value D	Value E	Value F
Value G	Value H	Value I

Table with Alignment

Left Aligned	Center Aligned	Right Aligned
Left text	Center text	Right
More left	More center	More right

Table with Merged Cells (Not supported in standard Markdown)

Header 1	Header 2
Cell 1,2	Cell 3,4
Cell 5,6	Cell 7,8

Links and Images

Inline Link

This is a link

Link with Title

This is a link with title

Image

Image with Title

Autolink

https://example.com

Blockquotes

Simple Blockquote

This is a simple blockquote.
It can contain multiple lines of text.

Blockquote with Code

def example():
    print("Code in blockquote")

Nested Blockquotes

Outer blockquote

Inner blockquote

Back to outer blockquote

Horizontal Rules

---

This is a horizontal rule using three dashes.

---

This is a horizontal rule using asterisks.

---

This is a horizontal rule using underscores.

Task Lists

• Completed task
• Incomplete task
• Another incomplete task
  • Nested completed task
  • Nested incomplete task

Details and Summaries

Click to expand/collapse

This content is inside a details/summary element.
It can contain any valid Markdown content.

Example code block within details

---

Additional Content to Reach 1,000 Lines

Section 1: Lorem Ipsum Variations

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem.

Ut enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?

Section 2: Technical Documentation Examples

API Documentation Structure

# API Reference

## Authentication

### Obtaining an Access Token

To authenticate with our API, you need to obtain an access token. Follow these steps:

1. Register your application on our developer portal
2. Generate a client ID and secret
3. Implement the OAuth2 flow in your application
4. Store tokens securely

### Rate Limiting

Our API implements rate limiting to ensure fair usage:

- Standard tier: 100 requests per minute
- Premium tier: 1000 requests per minute
- Enterprise tier: Unlimited requests

## Endpoints

### GET /users

Retrieves a list of users.

**Parameters:**

| Parameter | Type   | Description                    |
|-----------|--------|--------------------------------|
| limit     | int    | Maximum number of results      |
| offset    | int    | Pagination offset              |
| sort      | string | Sort field                     |

**Response:**

```json
{
  "users": [
    {
      "id": 1,
      "name": "John Doe",
      "email": "john@example.com"
    }
  ],
  "pagination": {
    "total": 100,
    "limit": 10,
    "offset": 0
  }
}

POST /users

Creates a new user.

Request Body:

{
  "name": "Jane Doe",
  "email": "jane@example.com",
  "role": "admin"
}

Response:

{
  "id": 2,
  "name": "Jane Doe",
  "email": "jane@example.com",
  "created_at": "2024-01-15T10:30:00Z"
}

Error Handling

Our API uses standard HTTP status codes and includes error details in the response body.

Status Code	Meaning	Example Response
400	Bad Request	{"error": "Invalid input data"}
401	Unauthorized	{"error": "Invalid or expired token"}
403	Forbidden	{"error": "Access denied"}
404	Not Found	{"error": "Resource not found"}
5

Continue log

Continue log

[@continuedev] error: 500 Failed to parse tool call arguments as JSON: [json.exception.parse_error.101] parse error at line 1, column 7690: syntax error while parsing value - invalid string: missing closing quote; last read: '"# Comprehensive Markdown Test Document\n\n## Table of Contents\n1. Headings\n2. Text Formatting\n3. Lists\n4. Code Blocks\n5. Tables\n6. Links and Images\n7. Blockquotes\n8. Horizontal Rules\n9. Task Lists\n10. Details and Summaries\n\n## Headings\n\n### Level 3 Heading\nThis is a level 3 heading with some text.\n\n#### Level 4 Heading\nThis is a level 4 heading with some text.\n\n##### Level 5 Heading\nThis is a level 5 heading with some text.\n\n###### Level 6 Heading\nThis is a level 6 heading with some text.\n\n## Text Formatting\n\nBold text - This text is bold.\n\nItalic text - This text is italic.\n\nStrikethrough text - This text is strikethrough.\n\nInline code - This is inline code.\n\nDeleted text - This text appears deleted.\n\n> This is a blockquote.\n> It can span multiple lines.\n> And it can have different formatting styles.\n\n## Lists\n\n### Unordered Lists\n\n- First item\n- Second item\n- Third item\n - Nested item 1\n - Nested item 2\n - Deeply nested item\n\n### Ordered Lists\n\n1. First ordered item\n2. Second ordered item\n3. Third ordered item\n 1. Nested ordered item 1\n 2. Nested ordered item 2\n\n### Definition Lists\n\nTerm 1\n: Definition for term 1.\n\nTerm 2\n: Definition for term 2.\n\n## Code Blocks\n\n### Fenced Code Block (Language Specified)\n\npython\ndef hello_world():\n print(\"Hello, World!\")\n\nif __name__ == \"__main__\":\n hello_world()\n\n\n### Fenced Code Block (No Language)\n\n\nThis is a code block without a specified language.\nIt will be rendered as plain text.\n\n\n### Fenced Code Block (With Comments)\n\njavascript\n// This is a JavaScript file\nfunction calculateSum(a, b) {\n // Add two numbers\n return a + b;\n}\n\n// Export the function\nmodule.exports = calculateSum;\n\n\n### Indented Code Block\n\n This is an indented code block.\n It uses 4 spaces for indentation.\n Each line must be indented by 4 spaces.\n\n## Tables\n\n### Basic Table\n\n| Column 1 | Column 2 | Column 3 |\n|----------|----------|----------|\n| Value A | Value B | Value C |\n| Value D | Value E | Value F |\n| Value G | Value H | Value I |\n\n### Table with Alignment\n\n| Left Aligned | Center Aligned | Right Aligned |\n|:-------------|:--------------:|---------------:|\n| Left text | Center text | Right |\n| More left | More center | More right|\n\n### Table with Merged Cells (Not supported in standard Markdown)\n\n| Header 1 | Header 2 |\n|----------|----------|\n| Cell 1,2 | Cell 3,4 |\n| Cell 5,6 | Cell 7,8 |\n\n## Links and Images\n\n### Inline Link\n\nThis is a link\n\n### Link with Title\n\n[This is a link with title](https://example.com "Example Title")\n\n### Image\n\n\n\n### Image with Title\n\n\n\n### Autolink\n\nhttps://example.com\n\n## Blockquotes\n\n### Simple Blockquote\n\n> This is a simple blockquote.\n> It can contain multiple lines of text.\n\n### Blockquote with Code\n\n> python\n> def example():\n> print(\"Code in blockquote\")\n> \n\n### Nested Blockquotes\n\n> Outer blockquote\n> \n> > Inner blockquote\n> \n> Back to outer blockquote\n\n## Horizontal Rules\n\n---\n\nThis is a horizontal rule using three dashes.\n\n***\n\nThis is a horizontal rule using asterisks.\n\n___\n\nThis is a horizontal rule using underscores.\n\n## Task Lists\n\n- [x] Completed task\n- [ ] Incomplete task\n- [ ] Another incomplete task\n - [x] Nested completed task\n - [ ] Nested incomplete task\n\n## Details and Summaries\n\n

\n

Click to expand/collapse

\n\nThis content is inside a details/summary element.\nIt can contain any valid Markdown content.\n\n\nExample code block within details\n\n\n

\n\n---\n\n## Additional Content to Reach 1,000 Lines\n\n### Section 1: Lorem Ipsum Variations\n\nLorem ipsum dolor sit amet, consectetur adipiscing elit. Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.\n\nSed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo. Nemo enim ipsam voluptatem quia voluptas sit aspernatur aut odit aut fugit, sed quia consequuntur magni dolores eos qui ratione voluptatem sequi nesciunt. Neque porro quisquam est, qui dolorem ipsum quia dolor sit amet, consectetur, adipisci velit, sed quia non numquam eius modi tempora incidunt ut labore et dolore magnam aliquam quaerat voluptatem.\n\nUt enim ad minima veniam, quis nostrum exercitationem ullam corporis suscipit laboriosam, nisi ut aliquid ex ea commodi consequatur? Quis autem vel eum iure reprehenderit qui in ea voluptate velit esse quam nihil molestiae consequatur, vel illum qui dolorem eum fugiat quo voluptas nulla pariatur?\n\n### Section 2: Technical Documentation Examples\n\n#### API Documentation Structure\n\nmarkdown\n# API Reference\n\n## Authentication\n\n### Obtaining an Access Token\n\nTo authenticate with our API, you need to obtain an access token. Follow these steps:\n\n1. Register your application on our developer portal\n2. Generate a client ID and secret\n3. Implement the OAuth2 flow in your application\n4. Store tokens securely\n\n### Rate Limiting\n\nOur API implements rate limiting to ensure fair usage:\n\n- Standard tier: 100 requests per minute\n- Premium tier: 1000 requests per minute\n- Enterprise tier: Unlimited requests\n\n## Endpoints\n\n### GET /users\n\nRetrieves a list of users.\n\n**Parameters:**\n\n| Parameter | Type | Description |\n|-----------|--------|--------------------------------|\n| limit | int | Maximum number of results |\n| offset | int | Pagination offset |\n| sort | string | Sort field |\n\n**Response:**\n\njson\n{\n "users": [\n {\n "id": 1,\n "name": "John Doe",\n "email": "john@example.com"\n }\n ],\n "pagination": {\n "total": 100,\n "limit": 10,\n "offset": 0\n }\n}\n\n\n### POST /users\n\nCreates a new user.\n\n**Request Body:**\n\njson\n{\n "name": "Jane Doe",\n "email": "jane@example.com",\n "role": "admin"\n}\n\n\n**Response:**\n\njson\n{\n "id": 2,\n "name": "Jane Doe",\n "email": "jane@example.com",\n "created_at": "2024-01-15T10:30:00Z"\n}\n```\n\n### Error Handling\n\nOur API uses standard HTTP status codes and includes error details in the response body.\n\n| Status Code | Meaning | Example Response |\n|-------------|----------------------------|---------------------------------------|\n| 400 | Bad Request | {"error": "Invalid input data"} |\n| 401 | Unauthorized | {"error": "Invalid or expired token"} |\n| 403 | Forbidden | {"error": "Access denied"} |\n| 404 | Not Found | {"error": "Resource not found"} |\n| 5' {"context":"llm_stream_chat","model":"qwen35-9b-q4-mtp","provider":"openai","useOpenAIAdapter":true,"streamEnabled":true,"templateMessages":false}