Vasek Mlejnsky
5aa1d245aa
## Summary - Fixes garbled Unicode and box-drawing character rendering when running tmux inside E2B sandboxes - Adds `LANG=C.UTF-8` and `LC_ALL=C.UTF-8` environment variable defaults to PTY creation in both JS/TS and Python SDKs ## Problem When running applications like Claude Code inside tmux in an E2B sandbox, Unicode characters and box-drawing glyphs render incorrectly: **Before (broken):** - Box-drawing characters appear as broken dashes - Text alignment is garbled - The Claude mascot renders as `------` instead of proper pixel art **After (fixed):** - Proper Unicode rendering - Correct box-drawing characters - Properly aligned text ## Root Cause The PTY session was created with `TERM=xterm-256color` but without UTF-8 locale settings. Running `locale` in the sandbox showed: ``` LANG= LC_CTYPE="POSIX" LC_ALL= ``` tmux requires UTF-8 locale settings to properly render Unicode characters. Without them, it falls back to ASCII-only rendering. ## Solution Set `LANG` and `LC_ALL` to `C.UTF-8` by default when creating PTY sessions. This locale is: - Available on most modern Linux distributions - Provides UTF-8 character encoding - Portable and doesn't require specific locale packages The fix uses `setdefault` (Python) / nullish coalescing (JS) to allow users to override these values if needed. ## Files Changed | File | Change | |------|--------| | `packages/js-sdk/src/sandbox/commands/pty.ts` | Add LANG and LC_ALL defaults | | `packages/python-sdk/e2b/sandbox_async/commands/pty.py` | Add LANG and LC_ALL defaults | | `packages/python-sdk/e2b/sandbox_sync/commands/pty.py` | Add LANG and LC_ALL defaults | 🤖 Generated with [Claude Code](https://claude.com/claude-code) <!-- CURSOR_SUMMARY --> --- > [!NOTE] > **Fix tmux Unicode rendering by enforcing UTF-8 locale in PTYs** > > - In PTY creation (JS `pty.ts`, Python async/sync `pty.py`), default `LANG` and `LC_ALL` to `C.UTF-8`; set `TERM` only if not already provided > - Adds changeset entry documenting the patch > > <sup>Written by [Cursor Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit a914027d39568da2c9b022cb25e6f9b4e9aab91c. This will update automatically on new commits. Configure [here](https://cursor.com/dashboard?tab=bugbot).</sup> <!-- /CURSOR_SUMMARY --> Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
252 B
252 B
e2b
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Fix tmux rendering issues by adding UTF-8 locale environment variables (LANG, LC_ALL) to PTY creation. This fixes garbled Unicode and box-drawing characters when running applications like Claude Code inside tmux in E2B sandboxes.