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Agent-Sin: A reusable AI agent for automating daily chores like email, news, and todos

By

Shingo Irie

16d ago· 2 min readenProduct

Summary

Agent-Sin is a personal AI agent designed to handle repetitive daily tasks like email management, news digests, and todo reminders. Unlike prompt-based AI agents that are slow, inconsistent, and costly, Agent-Sin writes a small reusable program ("skill") for each task, ensuring stable, fast, and cheap execution. Users can request tasks in plain language, and the agent reliably runs them on schedule without prompt drift or surprise bills.

Key quotes

· 3 pulled
The problem with prompt-based agents: same request, different result. Slow. And the bill keeps climbing.
So I took the opposite approach — let the agent write a small program for each task, and just run that program from then on. Stable, fast, cheap.
Agent-Sin turns your request into a reusable program (a 'skill'), so the same task runs reliably, fast, and cheaply — every time. No prompt drift, no surprise bills.
Snippet from the RSS feed
Agent-Sin is a personal AI agent that handles the small daily chores quietly stealing your time — email, news, todos, "where did I put that?" searches across Slack and notes. Just ask in plain language. Agent-Sin turns your request into a reusable program

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