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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 v2.1.178

Agent Tool: isolation: "remote" — Cloud-Hosted Subagents

What

The Agent tool's isolation parameter now accepts "remote" in addition to "worktree". This launches the agent in a remote cloud (CCR) environment, always as a background task.

Usage
// In a skill or agent prompt instructing Agent tool use:
isolation: "remote"
Details
  • Always runs in the background; you are notified when it completes
  • Remote agents run against the repository's default branch if the current local branch is not pushed to origin
  • Not available in all contexts: if CCR is unavailable, the tool reports [remote agent] isolation:'remote' is unavailable
  • A local agent context or no git root causes automatic fallback to other isolation modes
Evidence

Remote agent branch check (search for "[remote agent] local branch '", "isolation:'remote' is unavailable", "CLAUDE_CODE_REMOTE_SESSION_ID")

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

See this entry in the whole of v2.1.178 →