Designing Single-Purpose Agents Instead of One Big Automation Script

Short summary

Single-purpose automation agents outperform monolithic scripts by isolating failures and keeping systems maintainable. Each agent handles one task, outputs JSON to a shared outbox, and communicates failures through a single notification channel. This architectural pattern—though more moving parts than a monolith—prevents one bug from cascading across the system, making debugging and deployment safer.

• •Small single-purpose agents beat one large automation script through clear separation of concerns
• •Three-contract system: JSON artifacts, shared notification channel, one aggregation dashboard
• •Failure isolation: a bug in one agent cannot cascade to others or break the whole system

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