Model picker adds custom entries via env var; Opus 1M context fixed for unknown plan tiers; 18 fixes address sandbox security, stop hook loops, and cross-platform voice mode.
StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.)${CLAUDE_PLUGIN_DATA} variable for plugin persistent state that survives plugin updates; /plugin uninstall prompts before deleting iteffort, maxTurns, and disallowedTools frontmatter support for plugin-shipped agentsANTHROPIC_CUSTOM_MODEL_OPTION env var to add a custom entry to the /model picker, with optional _NAME and _DESCRIPTION suffixed vars for displaygit log HEAD failing with "ambiguous argument" inside sandboxed Bash on Linux, and stub files polluting git status in the working directorycc log and --resume silently truncating conversation history on large sessions (>5 MB) that used subagentsdeny: ["mcp__servername"] permission rules not removing MCP server tools before sending to the model, allowing it to see and attempt blocked toolssandbox.filesystem.allowWrite not working with absolute paths (previously required // prefix)/sandbox Dependencies tab showing Linux prerequisites on macOS instead of macOS-specific info.git, .claude, and other protected directories being writable without a prompt in bypassPermissions mode--worktree flag not loading skills and hooks from the worktree directoryCLAUDE_CODE_DISABLE_GIT_INSTRUCTIONS and includeGitInstructions setting not suppressing the git status section in the system promptANTHROPIC_BETAS environment variable being silently ignored when using Haiku modelsset -g allow-passthrough onsandbox.enabled: true is set but dependencies are missing — now shows a visible startup warning