Mario Alberto Chávez - Ruby on Rails, AI Tools & former CTO

A few weeks ago, I noticed something odd in my Rails applications.

Eight posts of this series are published.

After Part 6 the workflow produces three JSON files, one per source, each a list of classified items.

I have been saying the source agents write their output into “the :local sandbox” without explaining what that is.

The workflow from Part 4 runs the three sources one after another.

At this point the source catalog has three inboxes, each read by an agent.

Apple Mail was reachable over MCP, so Part 1 attached it with the mcp macro and never wrote a line of integration code.

At the end of the previous post the agent could read an Apple Mail inbox and produce a digest, but the triage policy lived in a Ruby heredoc.

bin/ci was green.

In the last post I set up Nexo and ran a five-line agent on a local model.

Nexo shipped this week.