[BUG] Invalid API key · Please run /login (Linux)

Claude Code CLI version 1.0.96 fails to create OAuth credentials file after successful authentication in Linux
container environments. The /login command reports "Login successful" but no .credentials.json file is created
anywhere on the filesystem, and subsequent commands fail with "invalid API key" errors.

Environment

• Claude Code Version: 1.0.96
• Platform: Linux container (Docker)
• Base Image: node:20
• Container User: node (non-root)
• Host OS: macOS (Docker Desktop)

Steps to Reproduce

1. Run Claude Code CLI in Linux container:

docker run --rm -it node:20 bash
npm install -g @anthropic-ai/claude-code

1. Attempt authentication:

claude auth login

1. Complete OAuth flow in browser (link opens successfully)
2. Browser shows "Login successful" message
3. Check authentication status and credentials:

claude auth status
find / -name ".credentials.json" 2>/dev/null
find / -name "credentials.json" 2>/dev/null
ls -la ~/.claude/
ls -la ~/.config/claude/

Expected Behavior

• OAuth credentials should be saved to ~/.claude/.credentials.json (or similar location)
• Credentials file should exist on filesystem after successful login
• claude auth status should show authenticated state
• Subsequent Claude commands should work without authentication errors

Actual Behavior

• No .credentials.json file is created anywhere on the filesystem
• Directory ~/.claude/ exists
• claude auth status reports authentication failure/invalid API key
• All subsequent Claude commands fail with authentication errors
• OAuth flow appears to complete successfully but tokens are not persisted

Additional Information

• The OAuth redirect flow completes successfully in the browser with "Login successful" message
• Issue is specific to Linux container environments
• Same authentication process works correctly on macOS host
• Problem persists across different container configurations and users (root/non-root)
• No permission errors or filesystem issues evident in container logs
• Issue affects production Docker-based automation workflows

Impact

This blocks automated Docker-based workflows that depend on Claude Code CLI authentication, particularly CI/CD pipelines and containerized development environments where OAuth credential persistence is required.