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Claude Code Updates Include AGENTS.md Support and Gateway Enhancements

Claude Code has introduced support for AGENTS.md in projects without a CLAUDE.md file, alongside new configurations for Claude apps gateways.

By Illumora Editorial

Source · Sep 18, 2026, 6:06 PM · On Illumora · Sep 18, 2026, 6:12 PM

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Read the source →Claude Code What's New + releases — Claude Code changelog - Claude Code Docs
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Recent updates to Claude Code introduce several new features and fixes. Among these, Claude Code now supports AGENTS.md as an alternative to CLAUDE.md for project instructions when the latter is not present. This change is configurable under "Project instructions" in /config, though it is not yet available on Bedrock, Vertex, or Foundry.

Key Points

  • Claude Code now supports AGENTS.md in projects that do not contain a CLAUDE.md file.
  • This AGENTS.md support is not yet available on Bedrock, Vertex, or Foundry.
  • A new configuration, CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY=1, has been added for Claude apps gateways where egress is a forward proxy.
  • Claude apps gateways can now include an optional headers map on upstreams to send static headers to a proxy.
  • A line indicating a background task's update is waiting now appears when the task finishes while a panel like /tasks is open.
  • Fixes address claude -p and Agent SDK sessions that previously hung after internal errors, now reporting the error and exiting with code 1.
  • Conversations no longer fail with "text content blocks must be non-empty" when an earlier assistant turn contained an empty text block alongside other content.

Context

According to the Claude Code changelog, these updates aim to enhance project configuration flexibility and improve the robustness of gateway operations and error handling within the development environment. The introduction of AGENTS.md provides an alternative method for defining project instructions.

Why It Matters

These updates offer developers more control over project configurations and network egress for Claude applications, potentially streamlining development workflows and improving the reliability of Claude Code sessions and conversations.

What To Do

  • Note the new AGENTS.md support for projects lacking CLAUDE.md and consider its use for project instructions.
  • Review the new gateway configurations, CLAUDE_GATEWAY_PROXY_IS_EGRESS_BOUNDARY=1 and the optional headers map, if managing Claude apps gateways with forward proxies.
  • Observe improved error reporting for claude -p and Agent SDK sessions.
  • Test conversations to confirm resolution of the "text content blocks must be non-empty" issue.

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