ultrathink now runs at xhigh effort on Opus 5.5, Sonnet 5.5, Haiku 5.5 and Fable 5.1, plus a broad stability pass on freezes, hangs and session recovery across CLI and cloud.
--hold-idle-file and --max-hold-min to self-hosted-runner, to keep an idle session while your host reports processes it left running/teleport and claude --teleport to warn when a compacted cloud session loads from its last compaction, so the messages it summarized aren't in the local copy#name and no longer says the address bar stays the same as you switch viewsclaude --model opusclaude -p and SDK sessions saving transcript messages out of order or keeping messages that were taken backSubagentStop hooks running about twice a minute for each running subagent instead of once when it finishes.ignore/.rgignore negation rules that re-include git-ignored filesclaude mcp add, claude mcp remove and /mcp naming the current folder instead of the project entry in ~/.claude.json that holds a local-scope server when run below a repository rootclaude mcp list and claude mcp get showing the error code twice on failed-connection lines (for example ENOENT: ENOENT: …)claude daemon restart; it now suggests claude daemon stop --any and says it ends background sessionsclaude respawn <id> starting the background service before reporting that no background session matches the id/effort not warning about a prompt cache miss in plan mode when the plan model differs from the session model/ide saying the VS Code extension was installed before the install finished or when it failedagent; Cowork cloud sessions now ignore that setting--resume, --continue, /resume or --session-id, including after /clear or a crash, and /branch writing to the original session's list! open /tmp/shot.png or /review look at /tmp/shot.png, attaching the image and dropping its path from the prompt"\" or (\), disappearing from Claude's responsesDISABLE_COMPACT is setDISABLE_COMPACT is set/code-review, or another skill that runs in a sub-agent, running a second time when a cloud or background session restarts/ide saying it had installed the JetBrains plugin when nothing was installed/mcp showing a remote server as failed after "Clear authentication" when the server works without sign-in/mcp showing "authenticated" for a remote server that Claude Code sends no credentials to--plugin-dir folder of plugins loading as one plugin when an empty .mcp.json was at its top/usage never showing large prompt-cache misses under "What's contributing to your limits usage?"CLAUDE_CODE_RETRY_WATCHDOG), indefinitelybwrap: Can't create file when a --plugin-dir folder was also an added directory and permissions.blockReadsOutsideWorkingDirectories was onultrathink in the interactive terminal to run its turn at xhigh effort on Opus 5.5, Sonnet 5.5, Haiku 5.5 and Fable 5.1 through Anthropic's API; typed while Claude is working, it raises the rest of that turnultrathink rainbow to appear only where the keyword can raise effort, and not when the word is quoted or part of a file path--output-format json and stream-json output to write DEL, C1 control and Unicode format characters inside strings as \uXXXX escapes; parsed values are unchanged[1m] suffix and its label on models where the suffix has no effect; the suffix is still accepted/code-review to tell Claude to put the effort level first and use max only when askedDISABLE_COMPACT in settings files and in a mod's $.env.set so they can only turn compaction off, not back onCLAUDE_CODE_SYNC_SKILLS with feature-flag fetching off to reuse a claude.ai skills list up to 10 minutes old that another session on the machine fetchedclaude purge to say it deletes data only on this computer, not anything stored by AnthropicDISABLE_TELEMETRY set while VS Code's telemetry setting is off, so they send no usage metrics or error reports and fetch no feature flags