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[Bug] Anthropic API Response: Malformed JSON Generation #6869

Closed as duplicate

Description

@thomnico

Bug Description
Claude Code create malformed json when calling the model

Environment Info

  • Platform: darwin
  • Terminal: vscode
  • Version: 1.0.98
  • Feedback ID:

Errors

[{"error":"Error: Agent file /Users/nicolasthomas/inkan/sales-marketing-auto/.claude/agents/crm-integration-specialist.md is missing required 'name' in frontmatter\n    at pX5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:6762)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5236\n    at Array.map (<anonymous>)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5166\n    at async Promise.all (index 2)\n    at async WP0.<anonymous> (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3648:1198)\n    at async WP0.parseAsync (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:662:4184)\n    at async yS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3678:1293)\n    at async PS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3638:1100)","timestamp":"2025-08-30T09:18:06.030Z"},{"error":"Error: Agent file /Users/nicolasthomas/inkan/sales-marketing-auto/.claude/agents/data-pipeline-specialist.md is missing required 'name' in frontmatter\n    at pX5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:6762)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5236\n    at Array.map (<anonymous>)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5166\n    at async Promise.all (index 2)\n    at async WP0.<anonymous> (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3648:1198)\n    at async WP0.parseAsync (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:662:4184)\n    at async yS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3678:1293)\n    at async PS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3638:1100)","timestamp":"2025-08-30T09:18:06.040Z"},{"error":"Error: Agent file /Users/nicolasthomas/inkan/sales-marketing-auto/.claude/agents/production-ops-specialist.md is missing required 'name' in frontmatter\n    at pX5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:6762)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5236\n    at Array.map (<anonymous>)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5166\n    at async Promise.all (index 2)\n    at async WP0.<anonymous> (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3648:1198)\n    at async WP0.parseAsync (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:662:4184)\n    at async yS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3678:1293)\n    at async PS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3638:1100)","timestamp":"2025-08-30T09:18:06.043Z"},{"error":"Error: Agent file /Users/nicolasthomas/inkan/sales-marketing-auto/.claude/agents/email-automation-specialist.md is missing required 'name' in frontmatter\n    at pX5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:6762)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5236\n    at Array.map (<anonymous>)\n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:2406:5166\n    at async Promise.all (index 2)\n    at async WP0.<anonymous> (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3648:1198)\n    at async WP0.parseAsync (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:662:4184)\n    at async yS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3678:1293)\n    at async PS5 (file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:3638:1100)","timestamp":"2025-08-30T09:18:06.045Z"},{"error":"Error: Failed to create shell snapshot: \n    at file:///Users/nicolasthomas/.claude/local/node_modules/@anthropic-ai/claude-code/cli.js:1519:737\n    at ChildProcess.exithandler (node:child_process:424:5)\n    at ChildProcess.emit (node:events:508:28)\n    at ChildProcess.emit (node:domain:489:12)\n    at maybeClose (node:internal/child_process:1101:16)\n    at Socket.<anonymous> (node:internal/child_process:457:11)\n    at Socket.emit (node:events:508:28)\n    at Socket.emit (node:domain:489:12)\n    at Pipe.<anonymous> (node:

Note: Error logs were truncated.

Activity

  1. github-actions commented on Aug 30, 2025

    @github-actions

    Found 3 possible duplicate issues:

    1. [Bug] Anthropic API Response: Malformed JSON Generation #6868
    2. Frontmatter Parsing Error: Missing 'name' Field Despite Valid YAML #6377
    3. Low Context Management in Claude Code CLI #5220

    This issue will be automatically closed as a duplicate in 3 days.

    • If your issue is a duplicate, please close it and 👍 the existing issue instead
    • To prevent auto-closure, add a comment or 👎 this comment

    🤖 Generated with Claude Code

  2. added
    duplicateThis issue or pull request already exists
    and removed
    bugSomething isn't working
    platform:macosIssue specifically occurs on macOS
    on Sep 3, 2025
  3. github-actions commented on Sep 3, 2025

    @github-actions

    This issue has been automatically closed as a duplicate of #6868.

    If this is incorrect, please re-open this issue or create a new one.

    🤖 Generated with Claude Code

  4. github-actions commented on Sep 10, 2025

    @github-actions

    This issue has been automatically locked since it was closed and has not had any activity for 7 days. If you're experiencing a similar issue, please file a new issue and reference this one if it's relevant.

  5. locked as resolved and limited conversation to collaborators on Sep 10, 2025
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