Claude Code 2.1.321: Why Deny Rules Are Your New Safety Fence

Claude Code version 2.1.325 fixes context sizing for subagents on distinct models, preventing workers with smaller context windows from receiving outputs sized for the main session. It also preserves subagent model pins across plan mode switches and includes fixes for third-party gateway context compaction, fallback plan saving, and zstd decoding.

Learn how Claude Code version 2.1.325 changes sandboxed Bash permissions by requiring explicit approval unless configured with autoAllowBashIfSandboxed true. We also cover crucial fixes to permission gaps, new prompts for scheduled tasks and loops, and smaller quality-of-life updates.

A deep dive into Claude Code 2.1.323, examining experimental Code Mode and critical default shifts like the 1M context assumption for unrecognized models. We also cover crucial updates to agent-to-agent message caps, plugin validation, and sandbox symlink permissions.

In Claude Code 2.1.321, mods written by Claude turn on automatically in auto and bypass modes, with mod tool calls bypassing ask rules entirely. Learn why explicit deny rules are now your primary safety barrier, how to freeze skills in CI, and what changed with path checks and model picking.

Explore the updates in Claude Code versions 2.1.321 and 2.1.322, featuring the introduction of Claude Fable 5.2 and Fast mode support on Google Cloud Vertex AI. Learn how to configure your environment, manage separate prompt caches to avoid unexpected token costs, and leverage new skill auto-reloading.

Learn how to use the new --settings flag added to claude remote-control in version 2.1.321 to configure custom profiles and safeguards for remote sessions. We also cover essential caveats, model updates, and critical sandbox and MCP OAuth security patches.

Explore the new /claude-api latency-optimize command in Claude Code 2.1.319, which tests faster API settings against your evals to reduce latency bottlenecks.

In Claude Code 2.1.319, auto mode removes its automatic client-side fallback when server safety checks fail, meaning headless pipelines behind gateways can now fail closed with exit code one. Learn how to diagnose your setup using /status, configure the CLAUDE_CODE_AUTO_MODE_SERVER environment variable, and prepare your CI workflows.

Discover how Claude Code 2.1.319 prevents unattended agents from stalling with the new permissions.denyInsteadOfPrompting setting. Learn how to configure it properly alongside explicit allow rules, and catch up on smaller quality-of-life additions like background MCP tasks.

Learn how Claude Code 2.1.318 expands deniedMcpServers URL matching to block Anthropic-provided servers and cloud connectors. We cover configuring organizational denylists, verifying policies with claude mcp list, and several smaller MCP quality-of-life fixes.