diff --git a/crates/arti-client/semver.md b/crates/arti-client/semver.md
new file mode 100644
index 000000000..ecec63212
--- /dev/null
+++ b/crates/arti-client/semver.md
@@ -0,0 +1 @@
+ADDED: `channel` configuration, and `channnel.padding` config variable.
diff --git a/crates/tor-cell/semver.md b/crates/tor-cell/semver.md
new file mode 100644
index 000000000..5ab912999
--- /dev/null
+++ b/crates/tor-cell/semver.md
@@ -0,0 +1,2 @@
+ADDED: PaddingNegotiateCmd caret_int
+BREAKING: PaddingNegotiate constructors changed
diff --git a/crates/tor-chanmgr/semver.md b/crates/tor-chanmgr/semver.md
new file mode 100644
index 000000000..668bef60d
--- /dev/null
+++ b/crates/tor-chanmgr/semver.md
@@ -0,0 +1,4 @@
+BREAKING: get_or_launch takes a ChannelUsage argument
+BREAKING: ChanMgr::new takes new dormancy, config, and netparams arguments
+BREAKING: AbstractChannel has a new method engage_padding_activities
+ADDED: ChannelConfig, Dormancy, ChannelUsage
diff --git a/crates/tor-circmgr/semver.md b/crates/tor-circmgr/semver.md
new file mode 100644
index 000000000..ca42dc0f7
--- /dev/null
+++ b/crates/tor-circmgr/semver.md
@@ -0,0 +1 @@
+BREAKING: Circuit construction now requires a ChannelUsage
diff --git a/crates/tor-config/semver.md b/crates/tor-config/semver.md
new file mode 100644
index 000000000..5121fb3dc
--- /dev/null
+++ b/crates/tor-config/semver.md
@@ -0,0 +1,2 @@
+ADDED: ReconfigureError::Bug enum variant
+ADDED: misc::PaddingLevel
diff --git a/crates/tor-proto/semver.md b/crates/tor-proto/semver.md
index 682b652e0..e84f6f21b 100644
--- a/crates/tor-proto/semver.md
+++ b/crates/tor-proto/semver.md
@@ -1 +1,8 @@
 BREAKING: Remove key-specific accessors.
+BREAKING: ChannelsParamsUpdates renamed to ChannelPaddingInstructionsUpdates
+ADDED: Channel::engage_padding_activities
+ADDED: New methods for updating dormancy, netparams, and config
+BREAKING: padding::Parameters fields (builder methods) renamed to remove _ms suffix
+ADDED: padding::Parameters constructor disabled, and method padding_negotiate_cell
+BREAKING: ChannelsParamsUpdates::total_update changed, is now initial_update
+ADDED: ChannelPaddingInstructionsUpdates::combine, and field accessors