diff --git a/changelog.d/10690.bugfix b/changelog.d/10690.bugfix
new file mode 100644
index 0000000000..059eea7464
--- /dev/null
+++ b/changelog.d/10690.bugfix
@@ -0,0 +1 @@
+Fix a long-standing bug that caused an `AssertionError` when purging history in certain rooms. Contributed by @Kokokokoka.
diff --git a/changelog.d/10782.bugfix b/changelog.d/10782.bugfix
new file mode 100644
index 0000000000..3e410447cc
--- /dev/null
+++ b/changelog.d/10782.bugfix
@@ -0,0 +1 @@
+Fix a long-standing bug which caused deactivated users that were later reactivated to be missing from the user directory.
\ No newline at end of file
diff --git a/changelog.d/10819.feature b/changelog.d/10819.feature
new file mode 100644
index 0000000000..4fa95a6cc9
--- /dev/null
+++ b/changelog.d/10819.feature
@@ -0,0 +1 @@
+Improve oEmbed previews by processing the author name, photo, and video information.
diff --git a/changelog.d/10820.misc b/changelog.d/10820.misc
new file mode 100644
index 0000000000..4373bf6f6b
--- /dev/null
+++ b/changelog.d/10820.misc
@@ -0,0 +1 @@
+Fix a long-standing bug where an `m.room.message` event containing a null byte would cause an internal server error.
\ No newline at end of file
diff --git a/changelog.d/10827.bugfix b/changelog.d/10827.bugfix
new file mode 100644
index 0000000000..11a618bf82
--- /dev/null
+++ b/changelog.d/10827.bugfix
@@ -0,0 +1 @@
+Fix error in deprecated `/initialSync` endpoint when using the undocumented `from` and `to` parameters.
diff --git a/changelog.d/10833.misc b/changelog.d/10833.misc
new file mode 100644
index 0000000000..f23c0a1a02
--- /dev/null
+++ b/changelog.d/10833.misc
@@ -0,0 +1 @@
+Extend the ModuleApi to let plug-ins check whether an ID is local and to access IP + User Agent data.
diff --git a/changelog.d/10865.doc b/changelog.d/10865.doc
new file mode 100644
index 0000000000..deeb0eedf3
--- /dev/null
+++ b/changelog.d/10865.doc
@@ -0,0 +1 @@
+Add developer documentation about experimental configuration flags.
diff --git a/changelog.d/10868.feature b/changelog.d/10868.feature
new file mode 100644
index 0000000000..07e7b2c6a7
--- /dev/null
+++ b/changelog.d/10868.feature
@@ -0,0 +1 @@
+Speed up responding with large JSON objects to requests.
diff --git a/changelog.d/10873.bugfix b/changelog.d/10873.bugfix
new file mode 100644
index 0000000000..32b2e50fd9
--- /dev/null
+++ b/changelog.d/10873.bugfix
@@ -0,0 +1 @@
+Fix a bug introduced in Synapse 1.37.0 which caused `knock` events which we sent to remote servers to be incorrectly stored in the local database.
diff --git a/changelog.d/10875.bugfix b/changelog.d/10875.bugfix
new file mode 100644
index 0000000000..6f370da5c7
--- /dev/null
+++ b/changelog.d/10875.bugfix
@@ -0,0 +1 @@
+Fix invalidating one-time key count cache after claiming keys. Contributed by Tulir at Beeper.
diff --git a/changelog.d/10880.misc b/changelog.d/10880.misc
new file mode 100644
index 0000000000..5f58d6198c
--- /dev/null
+++ b/changelog.d/10880.misc
@@ -0,0 +1 @@
+Break down Grafana's cache expiry time series based on reason for eviction---see #10829.
\ No newline at end of file
diff --git a/changelog.d/10881.bugfix b/changelog.d/10881.bugfix
new file mode 100644
index 0000000000..0a8905cc46
--- /dev/null
+++ b/changelog.d/10881.bugfix
@@ -0,0 +1 @@
+Fix application service users being subject to MAU blocking if MAU had been reached, even if configured not to be blocked.
diff --git a/changelog.d/10883.misc b/changelog.d/10883.misc
new file mode 100644
index 0000000000..9a765435db
--- /dev/null
+++ b/changelog.d/10883.misc
@@ -0,0 +1 @@
+Clean up some of the federation event authentication code for clarity.
diff --git a/changelog.d/10884.misc b/changelog.d/10884.misc
new file mode 100644
index 0000000000..9a765435db
--- /dev/null
+++ b/changelog.d/10884.misc
@@ -0,0 +1 @@
+Clean up some of the federation event authentication code for clarity.
diff --git a/changelog.d/10885.misc b/changelog.d/10885.misc
new file mode 100644
index 0000000000..586a0b3a96
--- /dev/null
+++ b/changelog.d/10885.misc
@@ -0,0 +1 @@
+Use direct references to config flags.
diff --git a/changelog.d/10887.bugfix b/changelog.d/10887.bugfix
new file mode 100644
index 0000000000..2d1f67489a
--- /dev/null
+++ b/changelog.d/10887.bugfix
@@ -0,0 +1 @@
+Allow the `.` and `~` characters when creating registration tokens as per the change to [MSC3231](https://github.com/matrix-org/matrix-doc/pull/3231).
diff --git a/changelog.d/10889.misc b/changelog.d/10889.misc
new file mode 100644
index 0000000000..6d60188f55
--- /dev/null
+++ b/changelog.d/10889.misc
@@ -0,0 +1 @@
+Clean up some unnecessary parentheses in places around the codebase.
\ No newline at end of file
diff --git a/changelog.d/10891.misc b/changelog.d/10891.misc
new file mode 100644
index 0000000000..6eecea4065
--- /dev/null
+++ b/changelog.d/10891.misc
@@ -0,0 +1 @@
+Improve type hinting in the user directory code.
\ No newline at end of file
diff --git a/changelog.d/10893.misc b/changelog.d/10893.misc
new file mode 100644
index 0000000000..586a0b3a96
--- /dev/null
+++ b/changelog.d/10893.misc
@@ -0,0 +1 @@
+Use direct references to config flags.
diff --git a/changelog.d/10896.misc b/changelog.d/10896.misc
new file mode 100644
index 0000000000..41de995842
--- /dev/null
+++ b/changelog.d/10896.misc
@@ -0,0 +1 @@
+ Clean up some of the federation event authentication code for clarity.
diff --git a/changelog.d/10897.misc b/changelog.d/10897.misc
new file mode 100644
index 0000000000..586a0b3a96
--- /dev/null
+++ b/changelog.d/10897.misc
@@ -0,0 +1 @@
+Use direct references to config flags.
diff --git a/changelog.d/10898.feature b/changelog.d/10898.feature
new file mode 100644
index 0000000000..97fa39fd0c
--- /dev/null
+++ b/changelog.d/10898.feature
@@ -0,0 +1 @@
+Add a `user_may_create_room_with_invites` spam checker callback to allow modules to allow or deny a room creation request based on the invites and/or 3PID invites it includes.
diff --git a/changelog.d/10901.misc b/changelog.d/10901.misc
new file mode 100644
index 0000000000..9a765435db
--- /dev/null
+++ b/changelog.d/10901.misc
@@ -0,0 +1 @@
+Clean up some of the federation event authentication code for clarity.
diff --git a/changelog.d/10905.feature b/changelog.d/10905.feature
new file mode 100644
index 0000000000..07e7b2c6a7
--- /dev/null
+++ b/changelog.d/10905.feature
@@ -0,0 +1 @@
+Speed up responding with large JSON objects to requests.
diff --git a/changelog.d/10906.misc b/changelog.d/10906.misc
new file mode 100644
index 0000000000..20a1cbfbd0
--- /dev/null
+++ b/changelog.d/10906.misc
@@ -0,0 +1 @@
+Update development testing script `test_postgresql.sh` to use a supported Python version and make re-runs quicker.
\ No newline at end of file
diff --git a/changelog.d/10907.bugfix b/changelog.d/10907.bugfix
new file mode 100644
index 0000000000..601b341f9f
--- /dev/null
+++ b/changelog.d/10907.bugfix
@@ -0,0 +1 @@
+Fix a long-standing bug which could cause events pulled over federation to be incorrectly rejected.
diff --git a/changelog.d/10911.bugfix b/changelog.d/10911.bugfix
new file mode 100644
index 0000000000..96e36bb15a
--- /dev/null
+++ b/changelog.d/10911.bugfix
@@ -0,0 +1 @@
+Avoid storing URL cache files in storage providers. Server admins may safely delete the `url_cache/` and `url_cache_thumbnails/` directories from any configured storage providers to reclaim space.
diff --git a/changelog.d/10913.bugfix b/changelog.d/10913.bugfix
new file mode 100644
index 0000000000..a0015c8241
--- /dev/null
+++ b/changelog.d/10913.bugfix
@@ -0,0 +1 @@
+Fix race conditions when creating media store and config directories.
diff --git a/changelog.d/10917.misc b/changelog.d/10917.misc
new file mode 100644
index 0000000000..9ce6eef94b
--- /dev/null
+++ b/changelog.d/10917.misc
@@ -0,0 +1 @@
+Document and summarize changes in schema version `61` - `64`.
diff --git a/changelog.d/10925.misc b/changelog.d/10925.misc
new file mode 100644
index 0000000000..0c8027ecc2
--- /dev/null
+++ b/changelog.d/10925.misc
@@ -0,0 +1 @@
+Update release script to sign the newly created git tags.
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