Windows: Long output truncation in PowerShell and file writes

Description

When using Claude Code on Windows 11 with PowerShell, long text output gets truncated. This affects both:

1. Terminal output — Long responses are cut off mid-content
2. File writes — When Claude Code writes long content to files, the content is also truncated

This means the recommended workaround of "use file-based workflows" does not help, since the truncation happens at a deeper level (likely ConPTY).

Environment

• OS: Windows 11 Pro 10.0.26200
• Terminal: PowerShell (also happens in Windows Terminal)
• Claude Code version: Latest
• Shell: bash

Steps to reproduce

1. Open Claude Code in PowerShell on Windows
2. Ask Claude to generate or write a long piece of content (e.g., a large file, a lengthy explanation)
3. Observe that the output is truncated — not all content is written/displayed

Expected behavior

Full content should be output regardless of length.

Actual behavior

Content is silently truncated after a certain length. No error is shown.

Related issues

• #14723 — Text output truncation
• #14587 — Response text truncated on Windows terminals
• #12870 — PowerShell statusLine truncation

Notes

• This appears to be related to Windows ConPTY limitations
• Switching to Git Bash (mintty) or WSL may work around the issue, but native PowerShell/Windows Terminal support should handle long output correctly