Merge pull request #9838 from circleci/DOCSS-1989-chunk-refinement

Chunk docs updates

Author: rosieyohannan

docs/guides/modules/toolkit/pages/chunk-setup-and-overview.adoc

@@ -1,14 +1,14 @@
-= Chunk setup and overview
+= Chunk overview and setup
 :page-badge: Beta
 :page-platform: Cloud
-:page-description: Learn how to set up Chunk by CircleCI and see what it can do.
+:page-description: Learn about Chunk by CircleCI and how to set it up.
 :experimental:
 
 NOTE: Chunk by CircleCI is currently in *beta*. There are no extra costs during beta. Chunk uses CircleCI credits and your AI model provider tokens. Chunk tasks will be a paid feature when generally available.
 
 TIP: *Feedback or feature requests?* Submit them on our link:https://circleci.canny.io/cloud-feature-requests?selectedCategory=chunk-ai[Ideas board, window=_blank] where you can also see existing feature requests and vote on them.
 
-Chunk by CircleCI is an AI agent that you can set up in your organization to assist with CI/CD related tasks:
+Chunk by CircleCI assists with CI/CD related tasks through a natural language chat interface and task scheduling.
 
 * Use the Chunk chat UI to get help with any aspect of your project.
 * Assign Chunk tasks to proactively manage your CI/CD processes. For an example see the xref:test:fix-flaky-tests.adoc[Fix Flaky Tests] guide.
@@ -17,7 +17,16 @@ Chunk by CircleCI is an AI agent that you can set up in your organization to ass
 
 Chunk connects to your existing CircleCI pipelines and analyzes both your build history and repository code to understand how your tests, configurations, and dependencies behave.
 
-Chunk uses AI to proactively manage your CI/CD processes. Set Chunk tasks to monitor for issues. When issues occur, Chunk identifies root causes, proposes or applies validated fixes automatically.
+Chunk is equipped with specialized skills to help you maintain and improve your software:
+
+*Fix flaky tests*:: Identify and resolve known flaky tests in your codebase.
+*Extend test coverage*:: Analyze your codebase and add new tests for untested or under-tested code.
+*Fix bugs*:: Detect and resolve bugs in your code.
+*Refactor code*:: Suggest improvements for better code maintainability.
+*Improve documentation*:: Add or enhance documentation for key functions and components.
+*Optimize build configs*:: Review and improve your CircleCI configuration for better performance and efficiency.
+
+When you provide Chunk with a task or question, it applies the appropriate specialized skill to deliver targeted solutions. As your codebase evolves—even as you write more code with AI assistance—Chunk helps ensure your software remains validated and your codebase stays healthy over time.
 
 Chunk uses your own OpenAI or Anthropic API key, so your data and credentials always stay fully under your control.