[Release] anthropics/claude-code v2.1.144: v2.1.144

Claude Code v2.1.144 introduces background session management improvements, including `/resume` support for sessions started via `claude --bg`, elapsed duration notifications, and model selection changes that now apply per-session. The release fixes critical bugs affecting terminal rendering, file handling, MCP server integration, and remote session authentication, while improving performance for startup times and streaming recovery.

Key Points

• •Background sessions now support `/resume` and appear alongside interactive sessions marked with `bg` tag, with elapsed duration shown in completion notifications
• •Model selection (`/model`) now changes only the current session; press `d` in picker to set default for new sessions
• •Fixed 75s startup hangs when `api.anthropic.com` is unreachable by implementing 15s timeouts for side-channel API calls
• •Resolved terminal rendering corruption issues including garbled glyphs in long sessions and window-resize event handling
• •Fixed MCP server integration: paginated `tools/list` responses now return all pages instead of silently dropping tools
• •Improved file handling to gracefully fall back to text when image extensions don't match contents (e.g., HTML saved as .png)
• •Fixed background session crashes on macOS when projects are in Full Disk Access-protected folders
• •Reduced spurious tool errors by making `head`/`tail` file views satisfy read-before-edit checks
• •Fixed model persistence: resumed sessions now keep their original model instead of adopting another session's choice
• •Enhanced MCP and plugin error reporting with actionable hints for configuration issues and missing installations

Workflow Diagram

Concepts