Fork subagents now default on in claude -p, SDK, desktop and VS Code, running in the background; plus a 25-fix stability pass and a new /config idle compaction toggle.
CLAUDE_CODE_AUTO_MODE_MODEL to choose the model the client-side auto mode classifier uses; it does not change the model for server-side auto modeIdle compaction row to /config for turning idle compaction off or back on; the notices shown after an idle compaction now say how to turn it off/design-sync and /design-login that standalone Claude Design (claude.ai/design) closes by December 14, 2026/autocompact and /effort saving to the wrong model when a gateway names Opus 4 or 4.1 with a prefix, such as anthropic/claude-opus-4-1claude plugin and other subcommands sometimes exiting before a queued settings or config write finished, which could lose the change or leave a .tmp file behindbin/ folder, and reporting an error when a search that finds nothing (rg, grep, findstr, git grep) is piped into Select-Object or another formatting cmdlet/mcp to authorize or reconnect an MCP server where that option isn't availableclassifier_category missing from OpenTelemetry tool_decision events for most auto mode classifier blocks, and new tool_decision attributes pushing out tool_use_id, tool_source and tool_parameters when OTEL_LOGRECORD_ATTRIBUTE_COUNT_LIMIT is lowclaude remote-control --help not printing its usage and exiting when not signed in/design consent and /design revoke suggesting /design-login when they fail in a cloud session, where it isn't available; the message now points to claude.ai/design/settingsresultType, ttlMs or cacheScopeclaude plugin details <name>@builtin suggesting claude plugin list, which never shows built-in plugins, when the plugin isn't found; it now points to /plugin.git file points at a directory that doesn't exist--plugin-dir@browser banner saying "Browser connected" when no browser with the Claude extension can be reachedclaude -p and Agent SDK sessions with no permission mode to start in default mode on third-party providers, with telemetry off or on a fresh install; --permission-mode auto keeps autosubagent_type: "fork") to be on by default in claude -p, the Agent SDK, the desktop app and VS Code, as they already are in the terminal; CLAUDE_CODE_FORK_SUBAGENT=0 turns them off, and claude mcp serve never offers themclaude -p, the Agent SDK, the desktop app and VS Code now run in the foreground by default← for agents footer hint to hide 10 seconds after a session opens; the count of agents waiting on you still shows/feedback: it now points to GitHub issues instead of an organization admin