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DisclaimerUnofficial, and not affiliated with Anthropic. Nearly all of this is read straight out of what ships: npm bundles, captured prompts, published docs. Anthropic's own notes go in verbatim, marked as theirs. The rest is my reading, and every entry carries the strings behind it. If one looks wrong, vote it down and say why.

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Claude Code v2.1.202

AWS and GCP Credential Environment Variables Forwarded to Subagents

Several cloud SDK environment variables that were previously not forwarded to spawned subagents are now included in the forwarded set.

Newly forwarded variables:

  • GCLOUD_PROJECT, GOOGLE_CLOUD_QUOTA_PROJECT
  • GCE_METADATA_HOST, GCE_METADATA_IP, METADATA_SERVER_DETECTION
  • AWS_CONTAINER_CREDENTIALS_FULL_URI, AWS_CONTAINER_CREDENTIALS_RELATIVE_URI
  • AWS_CONTAINER_AUTHORIZATION_TOKEN, AWS_CONTAINER_AUTHORIZATION_TOKEN_FILE
  • AWS_EC2_METADATA_SERVICE_ENDPOINT, AWS_EC2_METADATA_SERVICE_ENDPOINT_MODE
  • AWS_REGION, AWS_DEFAULT_REGION

This fixes authentication failures when subagents attempt to use EC2 instance profiles, ECS task roles, GCE metadata server credentials, or custom metadata endpoints.

Evidence

Environment forwarding list (search for "METADATA_SERVER_DETECTION" and "AWS_EC2_METADATA_SERVICE_ENDPOINT")

Strings lifted out of the shipped bundle, so the claim above can be checked against them.

See this entry in the whole of v2.1.202 →