Claude Code 2.1.218 moves /code-review to a background subagent
The July 22 build also kills a Windows path-corruption bug, surfaces MCP connection errors in the CLI, and quiets auto-mode permission prompts.
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/code-review now runs in the background
`/code-review` becomes a background subagent, so review output stops flooding your session and any slash commands you stack become its review target. `/code-review ultra` also stops silently doing a local review in non-interactive runs — it now launches the cloud review.
The C:\Users\unicorn path bug is dead
Windows paths with a `\u`-prefixed segment were being mangled into CJK characters in tool inputs, making those files unreachable. If Claude Code kept “losing” files on Windows, 2.1.218 is the fix you were waiting for.
See why an MCP server won't connect
`claude mcp list` and `/mcp` now show the HTTP status and error text when a server fails to connect, plus a warning for config values with hidden leading or trailing whitespace. Blind MCP debugging is over.
Auto mode nags less — and closes a hook hole
Dangerous-rm, background-`&` and suspicious-Windows-path checks no longer pop permission dialogs; the auto-mode classifier judges them, and plan mode stops prompting for Bash it can't prove read-only. A security fix also blocks agent frontmatter hooks from running out of untrusted folders.
Forked skills go background by default
Skills with `context: fork` now run in the background unless you set `background: false`, and `/deep-research` no longer auto-launches — it starts only when you invoke it. Fewer surprise long-running turns eating your context window.