CLI crashes in headless/stream-json mode (Ink raw mode error) - breaks Desktop remote SSH" --body-file /path/to/the/file

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Claude Code CLI crashes in headless/stream-json mode (Ink raw mode error)

Description

Claude Code CLI crashes immediately when launched in headless mode with --output-format stream-json --input-format stream-json and no TTY attached. This breaks Claude Desktop's remote SSH connections, as Desktop launches the remote CLI (ccd-cli) in exactly this mode.

Interactive mode works perfectly — only the headless/piped execution path is affected.

Reproduction

# This crashes immediately with exit code 1:
printf '{"request_id":"test","type":"control_request","request":{"subtype":"initialize","hooks":{}}}\n' \
  | setsid claude --output-format stream-json --input-format stream-json 2>&1

Error output

ERROR  Raw mode is not supported on the current process.stdin, which Ink uses as input stream by default.
       Read about how to prevent this error on https://github.com/vadimdemedes/ink/#israwmodesupported
 - handleSetRawMode (/$bunfs/root/src/entrypoints/cli.js:716:1946)
 - <anonymous> (/$bunfs/root/src/entrypoints/cli.js:723:3758)
 - wg (/$bunfs/root/src/entrypoints/cli.js:678:63130)
 - k7H (/$bunfs/root/src/entrypoints/cli.js:678:66416)
 - TN (/$bunfs/root/src/entrypoints/cli.js:678:74300)
 - k7H (/$bunfs/root/src/entrypoints/cli.js:678:67547)
 - TN (/$bunfs/root/src/entrypoints/cli.js:678:74300)
 - k7H (/$bunfs/root/src/entrypoints/cli.js:678:66403)
 - TN (/$bunfs/root/src/entrypoints/cli.js:678:74300)
 - k7H (/$bunfs/root/src/entrypoints/cli.js:678:66403)
 - async <anonymous> (/$bunfs/root/src/entrypoints/cli.js:15224:435)

Impact

Claude Desktop connects to remote servers via SSH and launches /root/.claude/remote/ccd-cli in headless stream-json mode. Because the CLI crashes on startup, all Claude Desktop remote sessions fail with "Claude Code process exited with code 1" / "VM service not running. The service failed to start."

Environment

• CLI version: 2.1.78 and 2.1.79 (both affected)
• OS: Ubuntu 24.04.4 LTS (GNU/Linux 6.8.0-100-generic x86_64)
• Desktop app version: 1.1.7464.0 (Windows, fresh install)
• Node: v22.x
• Install method: npm install -g @anthropic-ai/claude-code

Troubleshooting attempted

• Fresh reinstall of Claude Desktop (Windows)
• VPS reboot
• CLI upgrade from 2.1.78 → 2.1.79
• CLI downgrade to 2.1.72
• Deleting /root/.claude/remote/ to force re-provisioning
• Replacing ccd-cli binary with npm-installed claude binary
• Wrapping ccd-cli in a script -qec PTY wrapper (changed error location from stderr to stdout but still exit code 1)
• Removing all MCP servers and plugins from VPS config

Notes

• Interactive mode (claude in a terminal) works perfectly
• The remote server (/root/.claude/remote/server) provisions and connects fine — only the CLI subprocess crashes
• settings.json on the VPS is empty ({}) — no custom MCP servers or plugins

What Should Happen?

Expected behaviour

When launched with --output-format stream-json --input-format stream-json and no TTY, the CLI should skip Ink's interactive rendering and operate in pure JSON streaming mode without requiring raw mode on stdin.

Error Messages/Logs

Steps to Reproduce

Fresh reinstall of Claude Desktop (Windows)
VPS reboot
CLI upgrade from 2.1.78 → 2.1.79
CLI downgrade to 2.1.72
Deleting /root/.claude/remote/ to force re-provisioning
Replacing ccd-cli binary with npm-installed claude binary
Wrapping ccd-cli in a script -qec PTY wrapper (changed error location from stderr to stdout but still exit code 1)
Removing all MCP servers and plugins from VPS config

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.79

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

Interactive mode (claude in a terminal) works perfectly
The remote server (/root/.claude/remote/server) provisions and connects fine — only the CLI subprocess crashes
settings.json on the VPS is empty ({}) — no custom MCP servers or plugins