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Releases v2.1.166 → v2.1.1763 features · June 8–12
Move a session with /cdv2.1.169

The new /cd command moves the current session to a different working directory without rebuilding the prompt cache: the new directory’s CLAUDE.md is appended as a message instead of replacing the system prompt. The session relocates to the new directory’s project storage, so --resume and --continue find it there. Claude prompts you to trust the directory if you haven’t worked in it before.

Move the session into another project without restarting:

Claude Code
> /cd ../other-project
Commands reference
Subagents can spawn subagentsv2.1.172

Subagents can now spawn their own subagents. The subagent panel below the prompt shows the full tree: each row carries a count of its descendants and a path back to main. Subagent chains are capped at five levels deep to prevent runaway concurrent trees.

Open the agents view to watch the nested tree as work fans out:

Claude Code
> /agents
Spawn nested subagents
Troubleshoot with safe modev2.1.169

Start Claude Code with --safe-mode, or set CLAUDE_CODE_SAFE_MODE, to launch with all customizations disabled: CLAUDE.md, skills, plugins, hooks, MCP servers, and custom commands and agents do not load. Authentication, model selection, built-in tools, and permissions still work. If a problem disappears in safe mode, one of those surfaces is the cause.

Launch a clean session to isolate a broken configuration:

terminal
claude --safe-mode
Test against a clean configuration

Other wins

fallbackModel configures up to three fallback models tried in order when the primary is overloaded or unavailable, and --fallback-model now applies to interactive sessions too
Session titles are now generated in the language of your conversation; pin a specific one with the language setting
claude agents --json adds --all to include completed sessions plus new id and state fields, and no longer omits blocked or newly dispatched sessions
Browsing a marketplace’s plugins in /plugin now has a search bar
New disableBundledSkills setting and CLAUDE_CODE_DISABLE_BUNDLED_SKILLS hide bundled skills, workflows, and built-in commands from the model
Deny rules accept a glob in the tool-name position, so ”*” denies all tools, and unknown tool names in deny rules now warn at startup
Cross-session messaging is hardened: messages relayed via SendMessage from other sessions no longer carry user authority, and auto mode blocks them
Amazon Bedrock reads the AWS region from ~/.aws config files when AWS_REGION is unset, and /status shows where the region came from
New enforceAvailableModels managed setting makes the availableModels allowlist also constrain the Default model
Claude in Chrome browser tools now load in a single batched call instead of one per tool
claude update announces the target version before downloading instead of going silent
New footerLinksRegexes setting adds regex-matched link badges to the footer row
Full changelog for v2.1.166–v2.1.176 →