diff --git a/docs/changelog.rst b/docs/changelog.rst
index aec13e27..23eab873 100644
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+++ b/docs/changelog.rst
@@ -11,6 +11,8 @@ Changelog
 
 The third Datasette 1.0 alpha release adds upsert support to the JSON API, plus the ability to specify finely grained permissions when creating an API token.
 
+See `Datasette 1.0a2: Upserts and finely grained permissions <https://simonwillison.net/2022/Dec/15/datasette-1a2/>`__ for an extended, annotated version of these release notes.
+
 - New ``/db/table/-/upsert`` API, :ref:`documented here <TableUpsertView>`. upsert is an update-or-insert: existing rows will have specified keys updated, but if no row matches the incoming primary key a brand new row will be inserted instead. (:issue:`1878`)
 - New :ref:`plugin_register_permissions` plugin hook. Plugins can now register named permissions, which will then be listed in various interfaces that show available permissions. (:issue:`1940`)
 - The ``/db/-/create`` API for :ref:`creating a table <TableCreateView>` now accepts ``"ignore": true`` and ``"replace": true`` options when called with the ``"rows"`` property that creates a new table based on an example set of rows. This means the API can be called multiple times with different rows, setting rules for what should happen if a primary key collides with an existing row. (:issue:`1927`)