Preventing Silent Agent Loop Failures: An Orchestrator-Worker Architecture
CartoonistIcy9763 · reddit · 2026-08-14
The author shares a hidden pitfall in Agent development: instructing a model via prompt to "process one item at a time" is merely a probabilistic suggestion, not a hard guarantee. When dealing with large-scale, long-sequence tool calls, models (especially cheaper ones) tend to degrade and may even silently abandon the loop midway without throwing errors.
To solve this failure mode, the author restructured the single-agent loop into a dual-agent architecture:
- Orchestrator: Reads the inbox and dispatches new email tasks.
- Lead worker: A separate sub-agent dedicated to scoring, replying, and logging a single lead.
This architecture moves the "ensure every item is handled" logic outside the model, entrusting it to the platform's actual batching mechanism. By setting the worker's concurrency to 1, safe sequential writes to Excel are also guaranteed. Upon re-testing, the task omission issue was completely resolved.
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