Todo/task tools (TaskCreate, TodoWrite) are off by default on Opus 4.8, Sonnet 5, Fable 5, Mythos 5+; set CLAUDE_CODE_ENABLE_TODO_TOOLS=1 to restore them.
--worktree flag and the claude agents view (where MRs display as !N)forward_user_identity apps gateway setting on Anthropic upstreams that sends the signed-in user's identity as headers, so a proxy behind the gateway can attribute spend per userCLAUDE_CODE_TOOL_MEMORY_LIMIT) so a runaway build can't stall the sessionCLAUDE_CODE_WEBFETCH_CACHE_TTL_MS environment variable to configure the WebFetch session URL cache TTL (default unchanged: 15 minutes)claude self-hosted-runner session start time: the session branch is now created without rewriting the working tree, and two server round trips no longer block the agent's launchclaude plugin validate to check a bare .claude/skills directory, reporting SKILL.md files whose frontmatter fails to parse/effort selector renders as a numbered list with a typed-number prompt, and hint and dialog text is no longer clipped[claude-code:unrecognized_model] line is written to stderr when a request goes out for a model ID Claude Code doesn't recognize; map it with modelOverrides to silence/checkup and /review reporting "Unknown command" in -p mode or with plugins/MCP loaded when a user or project skill shadows the bundled skill\??\ device prefix bypassing UNC path validation, closing an NTLM credential-leak vectorcd <dir> && <command> > file Bash commands (a 2.1.232 regression)< file); a narrower version will return in a later releaseCLAUDE_CODE_ENABLE_TODO_TOOLS=1 to bring them back