Claude Code v2.1.216 でセッション遅延を修正

What's changed

• Added sandbox.filesystem.disabled setting to skip filesystem isolation while keeping network egress control

• Fixed a slowdown in long sessions where message normalization cost grew quadratically with the number of turns, causing multi-second stalls and slow resumes

• Fixed auto mode denying commands with "HTTP 401" classifier errors after the OAuth token expired or rotated mid-session

• Fixed AskUserQuestion telling Claude to continue even when your answer asked it to wait or explain first — free-text answers now get neutral wording

• Fixed Claude Code on the web re-asking the same question and dropping your answer after the session sat idle for a few minutes

• Fixed @-mentions silently attaching nothing after file-modifying hooks, vim dot-repeat of c-operators and paste, statusline running twice on resume, and resume-picker hangs on failure

• Fixed resumed background agent sessions reverting to the default agent: the agent's prompt and tool restrictions are now restored

• Fixed worktree-isolated subagents redirecting git into the shared checkout via git -C, --git-dir, or GIT_DIR/GIT_WORK_TREE

• Fixed worktree sessions landing in another project's leftover worktree when the working directory did not match the selected project

• Fixed background sessions whose worktree has no git repository being undeletable

• Fixed claude daemon stop --any potentially terminating an unrelated process via a stale legacy daemon lockfile

• Fixed Esc-Esc at an idle prompt not opening the rewind picker in long-running sessions with background tasks

• Fixed Bash command permission checking for compound statements with redirects inside && lists or negations

• Fixed pressing Ctrl+X twice in the agent list failing to delete a session, and deleted sessions reappearing when their background worker had died

• Fixed background subagents getting cancelled when a high-priority message arrives during their startup window

• Fixed mouse and focus garbage in the terminal while a GUI editor from /memory, /plan, /keybindings, or Ctrl+G is open; /memory no longer waits for the editor to close

• Fixed Claude-in-Chrome 403-looping on reconnect when the session's OAuth token lacks a required scope

• Fixed workflow saves and scheduled-task writes following a symlink at .claude, which could redirect writes outside the project

• Fixed MCP re-authenticate revoking working credentials before the new sign-in succeeds, and the reconnect needs-auth message in background sessions pointing at an unusable command

• Fixed read-only commands on Windows accessing network paths without a permission prompt

• Fixed Bash command parsing of non-ASCII characters to match real shell word boundaries

• Fixed PowerShell tool permission validation of commands containing invisible Unicode characters

• Fixed dialogs in fullscreen mode stretching past the right-hand edge of their panel

• Fixed the /config settings list in fullscreen mode clipping its keyboard-hint footer

• Fixed the transcript-mode (Ctrl+O) footer hint wrapping on terminals narrower than 104 columns

• Fixed the Prometheus metrics endpoint (OTEL_METRICS_EXPORTER=prometheus) emitting invalid # UNIT lines

• Fixed skills and commands changed during a session not appearing in the slash menu until restart

• Fixed plugin skills with a name frontmatter field losing their plugin prefix in slash-command autocomplete

• Fixed telemetry misreporting permission denials: failed permission-prompt requests no longer count as user rejections, and user interrupts are now reported as user aborts instead of rejections

• Improved the /fork confirmation to one line with the new session's name, claude attach id, and a note when the copy shares your checkout

• Improved validation of git and gh command arguments in the PowerShell tool

• Improved the /ultrareview diff-too-large error to show configured limits, measured diff size, and largest contributing files

• Improved /code-review ultra empty-diff message to name the exact base ref and suggest passing an explicit base

• Improved the spend limit adjustment prompt to show the server's reason when a spend limit change is rejected

• /context now shows an explicit warning when the conversation exceeds the context window, and a failed /compact displays as an error

• /rewind no longer restores or deletes files through symlinks or hard links at tracked paths and reports how many paths it skipped

• Background sessions: /mcp and /install-github-app now park a "needs input" request in the agent view when no client is attached

• Updated the bundled dataviz skill: reordered the default chart palette and fixed guidance that suggested direct labels for four-series charts

• [VSCode] Fixed right-to-left text (Arabic, Hebrew, Persian) rendering in the wrong order when mixed with English or code

• Fixed cloud sessions dropping the in-flight message when the session's container restarts mid-turn — the interrupted turn now re-runs on resume instead of leaving the session unresponsive