Open sourceOpen-source releaseAgents & Tool Use1 source · Oct 19, 2026

anthropics/claude-code v2.1.304

Added /claude-api managed-agents-secure, which compares a Managed Agents agent's settings with Anthropic's published security guide, without changing anything

Key points

  • Added a transcript line when a plugin that runs first skips one of your mod's hooks, naming the event and the plugin
  • Added decider: "person" to a mod's tool.check answer: only the permission dialog or a host's callback can approve the ask, and it is refused with the mod's reason where nobody can be asked
  • Added /auto-mode-setup: a guided setup that reads your project and recent sessions to teach auto mode about your environment, now also available on Bedrock, Vertex, Foundry, Claude apps gateway and telemetry-disabled sessions
  • Added a warning on Pro and Max plans when resuming an inactive conversation would use a noticeable share of your 5-hour usage limit: resume anyway, or start a new conversation and Claude can look up the previous one if you refer to it

Sources (1)

  • [1]anthropics/claude-code v2.1.304
    GitHub: anthropics/claude-code · Oct 19, 09:34 PM
    - Added `/claude-api managed-agents-secure`, which compares a Managed Agents agent's settings with Anthropic's published security guide, without changing anything
    - Added a transcript line when a plugin that runs first skips one of your mod's hooks, naming the event and the plugin

Extractive summary: sentences quoted from the sources.

Before this

  1. Oct 19, 2026You Are the Trigger: Speaker-Activated Backdoors
  2. Oct 19, 2026Same Simulation, Different Evidence: Where Retrieved Tool Output Costs LLM Agents Accuracy
  3. Oct 19, 2026unslothai/unsloth v0.1.909-beta: DeepSeek-V4.1 & FLUX-3
  4. Oct 19, 2026The Model Swap Workshop: GPT-5.5 vs Kimi vs DeepSeek vs Mistral
  5. Oct 19, 2026MiniMax M3.1 Flash shows China's AI price race has no floor in sight
  6. Oct 19, 2026HarnessPro: Recursive Harness Self-Improvement with Pareto Optimization for Performance-Cost Trade-offs

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