[BUG] Remote agent runs stuck on "Setting up a cloud container" — cannot cancel

Preflight Checklist

• [ ] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Body:

Scheduled and manual remote agent runs are stuck indefinitely at the "Setting up a cloud container" step
and never progress to "Clone repository." The issue affects both the automated schedule (3:00 AM EDT)
and manual triggers.

What's happening:

• All runs show status "Running" but are frozen at container setup
• The cancel button is unavailable — runs cannot be cancelled from the UI
• Affected runs: today at 3:00 AM (scheduled), 3:24 PM (manual), 3:30 PM (manual)
• Agent name: "Second Brain — Nightly Journal", runs daily at 3:00 AM EDT

What Should Happen?

What should happen (normal flow):

1. Setting up a cloud container — Anthropic spins up a fresh Linux VM in the cloud
2. Clone repository — your connected GitHub repo gets cloned into that VM
3. Run setup script — installs dependencies (Node, any tools your agent needs)
4. Start Claude Code — Claude Code CLI launches and runs your scheduled prompt against your vault

The whole thing takes ~2-3 minutes and then the agent does its work, writes files, and the container
shuts down.

Error Messages/Logs

Steps to Reproduce

Steps to reproduce:

1. Trigger a manual run on any scheduled remote agent
2. Run enters "Setting up a cloud container" and never advances
3. UI provides no way to cancel the stuck run

Expected behavior: Container provisions, repository clones, Claude Code starts, prompt executes.

Actual behavior: Stuck at container setup indefinitely. Multiple concurrent stuck runs accumulate with
no way to clear them.

Environment: Claude Code (Mac desktop app), remote agent via claude.ai

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.123

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_