[BUG] Scheduled triggers stuck at "Coalescing..." / "Processing..." — sessions never execute

Preflight Checklist

• [x] 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?

## Description

Scheduled remote triggers (Routines) create sessions that permanently hang at "Coalescing..." or
"Processing..." status. The agent never starts executing. The sidebar shows "No sessions found."

This affects both cron-scheduled runs and manual "Run now" executions.

## Reproduction

1. Create any remote trigger (even a minimal one with no MCP connections)
2. Run it manually or wait for cron
3. The session opens but stays at "Coalescing..." or "Processing..." indefinitely
4. No output is ever produced

## Timeline

• Apr 16 — Trigger created, first run completed successfully
• Apr 17 (first run) — Completed successfully
• Apr 17 (second run) onward — Every run hangs at "Coalescing..."
• Apr 20 — Tested with a minimal trigger (echo hello, no MCP connections, Bash+Read only) →

same result ("Processing..." loop)

## Trigger configuration

• Environment: claude-code-default (Anthropic Cloud)
• Model: claude-sonnet-4-6
• Source: GitHub repo via sources[].git_repository.url
• MCP connections tested: Attio, Slack, Notion (but also fails with zero MCP connections)

## What I've tried

• Reverting to the original prompt that worked on Apr 16 → still hangs
• Creating a brand new minimal trigger with no MCP and a trivial prompt (echo hello) → still

hangs

• Verified all MCP connectors (Attio, Slack, Notion) are connected and active in setting

What Should Happen?

## Expected behavior

The remote session should start, execute the prompt, and produce output — as it did on Apr 16-17.

## Actual behavior

Session permanently stuck at "Coalescing..." or "Processing..." with no output and "No sessions
found" in the sidebar.

Error Messages/Logs

Session permanently stuck at "Coalescing..." or "Processing..." with no output and "No sessions found" in the sidebar.

Steps to Reproduce

## Reproduction

1. Create any remote trigger (even a minimal one with no MCP connections)
2. Run it manually or wait for cron
3. The session opens but stays at "Coalescing..." or "Processing..." indefinitely
4. No output is ever produced

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.98

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="1456" height="707" alt="Image" src="https://github.com/user-attachments/assets/d12519e8-afab-4f31-9055-43c24af2ab42" />

<img width="1450" height="709" alt="Image" src="https://github.com/user-attachments/assets/058ab52e-d1b0-4342-a905-e6bc637040f6" />