Summary  
This chapter covers implementing an automated classification pipeline that iterates through data items, matches them against predefined categories, tags each with an audience label and a short rationale for the classification.

General domain of usage  
Message processing

Once messages are inside the workspace, they still need to be sorted before anyone can act on them.
 
**Classification** assigns every message in the messages folder to one of the categories you defined earlier, and flags the intended audience, turning an unsorted pile into a structured list.
 
Claude checks each message's content against your categories file. For this to work well:
* Categories must be clear and non-overlapping;
* Each result should include a short reason, so misclassifications are easy to catch and fix.

> ## Task
> Ask Claude to go through your messages folder and classify every message against your categories file, noting the likely audience for each one.
>
> > <b>Review the messages in my messages folder and assign each one a category from my categories file, along with its likely audience. Save the results in the processed folder.
>
> Spot-check a few results. If something is misclassified, that's usually a sign your category definitions need to be more specific.

Build a complete AI-powered communication system using Claude. You will learn how to judge tone and audience, match messages to the right channel, extract key points, draft clear communications, and organize everything into a reusable workflow.

Learn what makes a communication system reliable and how to prepare a structured workspace before drafting messages. You will define message categories, set style guidelines, and classify messages by type and audience.

Learn how to judge tone and audience fit, adapt messages, flag sensitive situations, and pull out the details a draft needs. You will adapt tone for different readers, flag high-stakes messages, extract key points, and handle conflicting expectations.

Turn everything you've built into finished messages. You will build reusable templates, generate final drafts, review them for tone and style compliance, and turn the process into a reusable Claude workflow.