TL;DR

• Update past 2.1.147 now. The Bash tool returns exit code 127 on every command in 2.1.147 (a regression); 2.1.148 ships the fix same-day.

• /simplify is gone, replaced by /code-review. The old cleanup-and-fix behavior is removed; /code-review reports correctness bugs at a chosen effort level, and --comment posts findings as inline GitHub PR comments (more below).

• Pin background sessions with Ctrl+T in claude agents. Pinned sessions stay alive when idle, restart in place for Claude Code updates, and are only shed under memory pressure after non-pinned sessions.

New in 2.1.148, 2.1.147

2.1.148 (May 22, 2026)

• Fixed the Bash tool returning exit code 127 on every command for some users (a regression introduced in 2.1.147)

2.1.147 (May 22, 2026)

• Pinned background sessions (Ctrl+T in claude agents) now stay alive when idle, are restarted in place to apply Claude Code updates, and are shed under memory pressure only after non-pinned sessions
• Renamed /simplify to /code-review. It now reports correctness bugs at a chosen effort level (e.g., /code-review high); pass --comment to post findings as inline GitHub PR comments. The old cleanup-and-fix behavior has been removed
• Improved auto-updater: retries transient network failures, reports specific error categories and OS error codes on failure, and shows the current version when an update fails
• Improved diff rendering performance for large file edits
• Prompt history no longer records consecutive duplicate entries
• Fixed enterprise login restrictions not being enforced against third-party-provider and API-key sessions
• Fixed & in ! command output displaying as &
• Fixed unknown slash commands silently doing nothing in headless/SDK mode
• Fixed /help rendering a broken tab header on small terminals
• Fixed shell snapshot dropping user functions whose names start with a single underscore
• Fixed plugin agents dropping all but the last Agent type entry
• Fixed hook if conditions like PowerShell(git push*) never matching
• Fixed PowerShell tool dropping output for commands that rely on the default formatter
• Fixed: on Windows, "Yes, and don't ask again" for PowerShell scripts now writes a matching rule
• Fixed PowerShell tool failing on Windows when pwsh is installed via winget or the Microsoft Store
• Fixed /effort opening with the slider on the wrong level
• Fixed paginating MCP servers dropping resources, templates, and prompts past page 1
• Fixed full-screen strobing in attached background sessions on Windows Terminal
• Fixed: on Windows, removing a background-job worktree no longer follows NTFS junctions into the main repo
• Fixed /background refusing sessions whose only typed input was a skill or custom slash command
• Fixed auto mode suppressing AskUserQuestion when the user or a skill explicitly relies on it
• Fixed /theme color editor dialogs not responding to Esc
• Fixed an uncaught exception at the end of streaming sessions when running via the Agent SDK
• Fixed a rare hang when waiting for scroll to settle on Windows
• Fixed stale and doubled rows in the agent view list on Windows with CJK characters
• Fixed pasted text being delivered to agents as an unreadable placeholder
• Fixed plugin component counts being doubled when manifest paths overlap default directories
• Fixed backgrounded sessions re-prompting for tool permissions already granted
• Fixed GNOME Terminal right-click and middle-click paste not inserting text
• Fixed CLAUDE_CODE_SUBAGENT_MODEL not applying to teammate processes
• Fixed slash commands followed by a tab or newline being treated as unknown
• Fixed spacing and layout glitches in several menus
• Fixed stripped images prompting repeated re-reads of absent media

Notes