claude-code

Claude Code 2.1.160: Security Prompts, Background Session Fixes

Claude Code 2.1.160 adds security prompts for shell startup files, fixes background session chat history loss, improves Windows/WSL clipboard and voice mode, and renames the dynamic workflow trigger to "ultracode".

TL;DR

New security prompts before writing to shell startup files and git config to prevent unintended command execution
Background session fixes: restored chat history, fixed freezing, improved performance
Windows/WSL improvements: clipboard copy-on-select, hyperlink paths, voice mode with special characters
Renamed dynamic workflow trigger from "workflow" to "ultracode"

New

Security prompts for shell startup files — Claude Code now prompts before writing to `.zshenv`, `.zlogin`, `.bash_login`, and `~/.config/git/` to prevent accidental command execution
acceptEdits mode config file protection — Prompts before modifying build-tool configs (`.npmrc`, `.yarnrc*`, `bunfig.toml`, `.bazelrc`, `.pre-commit-config.yaml`, `.devcontainer/`) that grant code execution
Ultracode trigger keyword — Dynamic workflows now triggered by "ultracode" instead of "workflow"; the old keyword no longer activates runs
Improved grep read-before-edit — Single-file `grep`/`egrep`/`fgrep` commands now satisfy the read check without requiring a separate Read action

Fixed

Windows clipboard copy-on-select now works on WSL using PowerShell interop instead of OSC 52, fixing MobaXterm compatibility
Background sessions restored from `claude agents` no longer drop chat history or re-run the original prompt
Overnight-retired background sessions losing conversation and re-running prompts
`claude --bg` "socket missing" failures on cold-start with high machine load
Windows directory deletion blocked after `claude rm` until background daemon exited
Completed background agents incorrectly shown under Completed in agents list
`claude agents` freezing for seconds on session list return due to auto-updater re-checking
Unresponsive Esc, arrow keys, and typing on Windows under heavy CPU load when attached to background sessions
Background agents emitting unsupported terminal sync markers (Apple Terminal, tmux) causing render artifacts
Mouse wheel scrolling prompt history instead of transcript after opening session from agents list
CJK IME composition appearing at bottom-left instead of input caret in agents view
Broken `file:///C:/...` hyperlinks on Windows terminals with hyperlink support
Voice mode connection failures with non-ASCII or special characters in project directory or branch name
Auto mode unavailability message on third-party providers (Bedrock/Vertex/Foundry) now correctly points to `CLAUDE_CODE_ENABLE_AUTO_MODE` opt-in
`/effort ultracode` incorrectly blaming dynamic workflows setting; ultracode no longer offered on unsupported models
Model-not-found errors suggesting `--model` when running via SDK or other hosts
Claude's past replies disappearing from scrollback when resuming brief mode session with brief mode off
Vim mode `p` pasting on line below instead of at cursor when register yanked with `v$`

Improved

Background agent session performance — Opening recently-inactive sessions in `claude agents` is now faster
Auto mode classifier latency — Reduced reasoning on routine actions, lowering "could not evaluate this action" blocks
Background session cleanup — Now sends SIGTERM to running shell subprocesses before SIGKILL, allowing cleanup handlers to run