Claude Code releases v2.1.72 with ExitWorktree and query cache fixes

• Anthropic shipped Claude Code 2.1.72 with “54 CLI changes” plus two flag changes and five system-prompt changes, led by direct /copy writes, mid-session ExitWorktree, and a kill switch for scheduled cron jobs, according to the changelog thread.
• The most material implementation fix is in the SDK path: the release notes say a query() prompt-cache bug was fixed, cutting input token costs by “up to 12x” in affected cases.
• The release also reduces friction in long-running agent sessions by fixing slow exits, /clear killing background tasks, stuck “Initializing…” states, and several permission-rule mismatches, as detailed in the release notes.
• Claude Code’s UI and tool surface keep expanding: the changelog adds a vscode://anthropic.claude-code/open URI handler and a preview clip shows in-terminal ⌘F search coming to the conductor interface.

The release is broad rather than flashy. Per the changelog thread, new workflow features include a w key in /copy to write the focused selection straight to a file “bypassing the clipboard,” an optional description argument for /plan, an ExitWorktree tool to leave an EnterWorktree session without ending the whole run, and support for marketplace Git URLs that omit the .git suffix. For remote and SSH-heavy setups, that direct write path is one of the clearest quality-of-life upgrades.

Version 2.1.72 also expands the config surface. The follow-up diff lists new environment variables including CLAUDE_CODE_DISABLE_CRON, CLAUDE_CODE_BRIEF, and CLAUDE_CODE_DISABLE_VIRTUAL_SCROLL, while the official changelog notes a new VS Code URI handler for opening a Claude Code tab programmatically with optional prompt and session parameters. The same release simplifies effort levels to low, medium, and high, removes max, and swaps the persistent icon for a brief notification.

The biggest operational change is the fix for prompt-cache invalidation in SDK query() calls. The release notes say that bug had been inflating input usage, and the fix can reduce token cost “up to 12x.” The release also swaps bash parsing to a native module for faster initialization and “no memory leak,” reduces false-positive permission prompts through better tree-sitter parsing, and fixes sandbox cases where some writes were wrongly allowed while harmless redirects still prompted.

Session reliability got a sizable cleanup too. The changelog fixes slow exits when hooks or background tasks lagged, prevents /clear from killing background agent and bash jobs, restores proper --continue behavior after --compact, and fixes crashes tied to Bedrock API errors and unusual Unicode returned by Read. The system-prompt diff in the prompt analysis also suggests a more explicit agent model, including concurrent launches, resume-by-ID, and worktree isolation rules. One practitioner complaint remains unresolved: a user screenshot shows Opus 4.6 in Claude Code auto-compacting with “Context left until auto-compact: 0%,” arguing that a 200k window is still too small for large code sessions.