add changesets

.changeset/hip-sloths-jog.md

@@ -0,0 +1,9 @@
+---
+'@storybook/mcp': minor
+---
+
+Replace the `source` property in the context with `request`.
+
+Now you don't pass in a source string that might be fetched or handled by your custom `manifestProvider`, but instead you pass in the whole web request. (This is automatically handled if you use the createStorybookMcpHandler() function).
+
+The default action is now to fetch the manifest from `../manifests/components.json` assuming the server is running at `./mcp`. Your custom `manifestProvider()`-function then also does not get a source string as an argument, but gets the whole web request, that you can use to get information about where to fetch the manifest from.