Missing Newline Termination in Generated Files

Bug Description
I've reported this before: Claude Code is incapable of ending files with a newline. This is often an error.
I've written a very helpful tool that lets Claude and I share a tmux shell terminal we can both see, read and write. Invaluable for debugging an ancient code base in lldb.
I pay $200/month.
I JUST WASTED TWO HOURS DEBUGGING WHY CLAUDE COULDN'T CONTROL A PARTICULAR TERMINAL SESSION THAT NEEDED A BLANK LINE AS LAST INPUT.
It was this same problem.

Environment Info

• Platform: darwin
• Terminal: iTerm.app
• Version: 1.0.51
• Feedback ID: 05dbd88e-ddb8-48dd-8497-2157c6a70be6

Errors

[{"error":"Error: Command failed: security find-generic-password -a $USER -w -s \"Claude Code\"\nsecurity: SecKeychainSearchCopyNext: The specified item could not be found in the keychain.\n\n    at genericNodeError (node:internal/errors:983:15)\n    at wrappedFn (node:internal/errors:537:14)\n    at checkExecSyncError (node:child_process:892:11)\n    at execSync (node:child_process:964:15)\n    at eD (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:712:4489)\n    at file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:624:13989\n    at Q (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:526:14406)\n    at QF (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:624:13129)\n    at cC (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:624:11995)\n    at qB (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:624:16609)","timestamp":"2025-07-15T05:25:57.598Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:418\n    at Object.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:26277)\n    at tqB.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:46:15576)\n    at sY (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:312)\n    at $w (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at gP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at vP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at VL (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at mw (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)\n    at yW (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:34990)","timestamp":"2025-07-15T05:40:09.077Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:418\n    at Object.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:26277)\n    at tqB.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:46:15576)\n    at sY (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:312)\n    at $w (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at gP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at vP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at VL (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at mw (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)\n    at yW (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:34990)","timestamp":"2025-07-15T05:40:30.289Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:418\n    at Object.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:26277)\n    at tqB.useMemo (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:46:15576)\n    at sY (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:1387:312)\n    at $w (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:65:19804)\n    at gP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:42569)\n    at vP (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38118)\n    at VL (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:38046)\n    at mw (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:37900)\n    at yW (file:///opt/homebrew/lib/node_modules/@anthropic-ai/claude-code/cli.js:67:34990)","timestamp":"2025-07-15T05:42:00.587Z"},{"error":"Error: Language not supported while highlighting code, falling back to markdown: \n    at file:///opt/homebre

Note: Error logs were truncated.