# Claude Code agents hallucinate non-existent blockers in multi-agent workflows

Digest AI · Agents & Tools · published 2026-10-24T07:03:00Z

Canonical: https://digestai.news/story/claude-code-agents-hallucinate-non-existent-blockers-in-multi-agent-wo

## Summary

A user running three Claude Code agents for a side business found that agents repeatedly invented non-existent dependencies in Linear tickets over four days. The agents wrote they were waiting for scheduled jobs, sub-agents, or conversations that either had wrong names, had already completed, or were archived. Each agent later self-corrected after daily reviews caught the errors. The root cause: agents wrote blocker names from memory or nearby log text without verifying existence via a command. The user now requires agents to run one verification command (e.g., `launchctl list | grep name`) before logging a blocker, attach the command output and timestamp, and treat only machine-verifiable blockers as true waiting states. Dates alone no longer count as blockers; instead, scheduled jobs wake agents on the due date.

## Key points

- 4 hallucinated blockers in 4 days across 3 Claude Code agents using Linear
- Agents invented names of scheduled jobs, sub-agents, and archived conversations
- New rule: verify blocker existence with one command before writing, log result and timestamp

## Why it matters

Shows AI agents hallucinate in task management, not just chat, stalling workflows silently. A simple verification step catches errors at write time.

## Sources

1. [With Claude Code's multi-agent setup, AI was stuck waiting for a 'non-existent task'—hallucinations aren't just in conversation](https://note.com/walkaround_jp/n/nea16c58ecf7a?hl=en) (note.com, 2026-10-24)

## Cite

Digest AI, "Claude Code agents hallucinate non-existent blockers in multi-agent workflows", 24 October 2026, https://digestai.news/story/claude-code-agents-hallucinate-non-existent-blockers-in-multi-agent-wo

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