feat: add local agent MCP tools and optional source-grounded AI answers

README.md

@@ -90,8 +90,12 @@ Use **Reindex** after adding or changing files in an indexed folder.
 
 ## Private by design
 
-You choose the folders to index. File contents, previews and search processing
-stay local. Your searches aren't sent to a cloud AI service.
+You choose the folders to index. By default, file contents, previews and search
+processing stay local. Ordinary searches aren't sent to a cloud AI service.
+
+If you enable optional AI answers, an explicit **Summarize** or **Ask** action
+sends the previewed document excerpt to the endpoint you choose. Ordinary
+searches continue to run locally.
 
 The model download happens during setup. Once it's ready, semantic inference
 runs on your device. The local search index contains information from your
@@ -126,6 +130,22 @@ the time went. Copied timing reports exclude your search text and file paths.
 
 </details>
 
+## Your agent can search, too
+
+Connect a local AI agent to searchi's read-only **MCP server**. It can search
+your chosen index and return snippets, source locations and search timings
+using the same engine as the desktop. A reusable skill also helps agents use
+searchi through the command line. [Connect an agent](docs/AGENT-INTEGRATION.md).
+Your agent receives the returned excerpts; cloud agents handle them according
+to that client's configuration.
+
+## Optional answers, your choice
+
+Want a short summary or an answer about a passage? Connect your preferred
+**OpenAI-compatible endpoint**, including a local model server. Preview exactly
+which excerpt will be sent, then choose **Summarize** or **Ask**. The feature is
+off by default; search works without it. [Set up optional answers](docs/AI-ANSWERS.md).
+
 ## Help shape searchi
 
 Found a problem, or searched for something that should have been easy to find?