API Error: duplicate tool_use IDs in print mode (-p)

Description

Using claude -p (print/non-interactive mode) with prompts that may trigger internal tool planning results in API errors about duplicate tool IDs.

Environment

• Version: 2.1.19 (Claude Code)
• OS: macOS (Darwin 24.6.0)
• Shell: zsh

Steps to Reproduce

1. Create a prompt file that references actions like "fetch" or "study" (which might trigger tool planning):

```

1. study the document docs/ralph-loop-research.md
2. Pick 1 reference that has not been marked as "STUDIED" yet and fetch it and study it
3. Fix/enhance/augment the document as needed based on the reference.

...
```

1. Run with print mode:

``bash
claude -p < PROMPT.md
``

Expected Behavior

Command executes and returns output like interactive mode does.

Actual Behavior

API Error: 400 {"type":"error","error":{"type":"invalid_request_error","message":"messages.1.content.1: `tool_use` ids must be unique"},"request_id":"req_011CXSemoH4u4kiKqUJDfKcW"}

Additional Context

• Simple prompts work fine (e.g., "Tell me a joke")
• The error occurs before any actual tool execution
• Disabling tools with --tools "" gives a similar error: API Error: 400 due to tool use concurrency issues
• Using --mcp-config '{}' or --strict-mcp-config does not help
• Interactive mode works fine with the same prompt content

This suggests the bug is in how -p mode constructs the API request when the prompt content might trigger tool-use planning, not in the MCP server initialization.