diff --git a/radicle-cli/src/commands/patch/edit.rs b/radicle-cli/src/commands/patch/edit.rs
index 075bf36f..a7053062 100644
--- a/radicle-cli/src/commands/patch/edit.rs
+++ b/radicle-cli/src/commands/patch/edit.rs
@@ -36,7 +36,7 @@ pub fn run(
         return Ok(());
     }
 
-    let root = patch.id.into();
+    let root = *patch.id;
     let target = patch.target();
 
     patch.transaction("Edit", &signer, |tx| {
diff --git a/radicle-cli/src/commands/patch/list.rs b/radicle-cli/src/commands/patch/list.rs
index 94ce3acb..ede4ac07 100644
--- a/radicle-cli/src/commands/patch/list.rs
+++ b/radicle-cli/src/commands/patch/list.rs
@@ -145,7 +145,7 @@ pub fn timeline(
 
     for (revision_id, revision) in patch.revisions() {
         // Don't show an "update" line for the first revision.
-        if **revision_id != **patch_id {
+        if *revision_id != **patch_id {
             timeline.push((
                 revision.timestamp(),
                 term::Line::spaced(
diff --git a/radicle-cob/src/backend/git/change.rs b/radicle-cob/src/backend/git/change.rs
index a6488e0e..f0ecae45 100644
--- a/radicle-cob/src/backend/git/change.rs
+++ b/radicle-cob/src/backend/git/change.rs
@@ -12,11 +12,10 @@ use once_cell::sync::Lazy;
 use radicle_git_ext::commit::trailers::OwnedTrailer;
 
 use crate::change::store::Version;
-use crate::history::entry::Timestamp;
 use crate::signatures;
 use crate::{
-    change::{self, store, Change},
-    history::entry,
+    change,
+    change::{store, Contents, Entry, Timestamp},
     signatures::{ExtendedSignature, Signatures},
     trailers, Embed,
 };
@@ -99,7 +98,7 @@ impl change::Storage for git2::Repository {
         parents: Vec<Self::Parent>,
         signer: &Signer,
         spec: store::Template<Self::ObjectId>,
-    ) -> Result<Change, Self::StoreError>
+    ) -> Result<Entry, Self::StoreError>
     where
         Signer: crypto::Signer,
     {
@@ -129,7 +128,7 @@ impl change::Storage for git2::Repository {
             tree,
         )?;
 
-        Ok(Change {
+        Ok(Entry {
             id,
             revision: revision.into(),
             signature,
@@ -149,7 +148,7 @@ impl change::Storage for git2::Repository {
             .collect::<Vec<_>>())
     }
 
-    fn load(&self, id: Self::ObjectId) -> Result<Change, Self::LoadError> {
+    fn load(&self, id: Self::ObjectId) -> Result<Entry, Self::LoadError> {
         let commit = Commit::read(self, id.into())?;
         let timestamp = git2::Time::from(commit.committer().time).seconds() as u64;
         let resource = parse_resource_trailer(commit.trailers())?;
@@ -172,7 +171,7 @@ impl change::Storage for git2::Repository {
         let manifest = load_manifest(self, &tree)?;
         let contents = load_contents(self, &tree)?;
 
-        Ok(Change {
+        Ok(Entry {
             id,
             revision: tree.id().into(),
             signature: ExtendedSignature::new(key, sig),
@@ -220,10 +219,7 @@ fn load_manifest(
     })
 }
 
-fn load_contents(
-    repo: &git2::Repository,
-    tree: &git2::Tree,
-) -> Result<entry::Contents, error::Load> {
+fn load_contents(repo: &git2::Repository, tree: &git2::Tree) -> Result<Contents, error::Load> {
     let ops = tree
         .iter()
         .filter_map(|entry| {
diff --git a/radicle-cob/src/change.rs b/radicle-cob/src/change.rs
index 1a9a0fb6..1ae1b51b 100644
--- a/radicle-cob/src/change.rs
+++ b/radicle-cob/src/change.rs
@@ -3,11 +3,11 @@
 use git_ext::Oid;
 
 pub mod store;
-pub use store::{Storage, Template};
+pub use store::{Contents, EntryId, Storage, Template, Timestamp};
 
 use crate::signatures::ExtendedSignature;
 
 /// A single change in the change graph. The layout of changes in the repository
 /// is specified in the RFC (docs/rfc/0662-collaborative-objects.adoc)
 /// under "Change Commits".
-pub type Change = store::Change<Oid, Oid, ExtendedSignature>;
+pub type Entry = store::Entry<Oid, Oid, ExtendedSignature>;
diff --git a/radicle-cob/src/change/store.rs b/radicle-cob/src/change/store.rs
index 663898fe..16deac6d 100644
--- a/radicle-cob/src/change/store.rs
+++ b/radicle-cob/src/change/store.rs
@@ -6,12 +6,9 @@ use nonempty::NonEmpty;
 use radicle_git_ext::Oid;
 use serde::{Deserialize, Serialize};
 
-use crate::{
-    history::{Contents, Timestamp},
-    signatures, TypeName,
-};
+use crate::{signatures, TypeName};
 
-/// Change storage.
+/// Change entry storage.
 pub trait Storage {
     type StoreError: Error + Send + Sync + 'static;
     type LoadError: Error + Send + Sync + 'static;
@@ -20,7 +17,7 @@ pub trait Storage {
     type Parent;
     type Signatures;
 
-    /// Store a new change.
+    /// Store a new change entry.
     #[allow(clippy::type_complexity)]
     fn store<G>(
         &self,
@@ -28,16 +25,16 @@ pub trait Storage {
         parents: Vec<Self::Parent>,
         signer: &G,
         template: Template<Self::ObjectId>,
-    ) -> Result<Change<Self::Parent, Self::ObjectId, Self::Signatures>, Self::StoreError>
+    ) -> Result<Entry<Self::Parent, Self::ObjectId, Self::Signatures>, Self::StoreError>
     where
         G: crypto::Signer;
 
-    /// Load a change.
+    /// Load a change entry.
     #[allow(clippy::type_complexity)]
     fn load(
         &self,
         id: Self::ObjectId,
-    ) -> Result<Change<Self::Parent, Self::ObjectId, Self::Signatures>, Self::LoadError>;
+    ) -> Result<Entry<Self::Parent, Self::ObjectId, Self::Signatures>, Self::LoadError>;
 
     /// Returns the parents of the object with the specified ID.
     fn parents_of(&self, id: &Oid) -> Result<Vec<Oid>, Self::LoadError>;
@@ -52,8 +49,18 @@ pub struct Template<Id> {
     pub contents: NonEmpty<Vec<u8>>,
 }
 
+/// Entry contents.
+/// This is the change payload.
+pub type Contents = NonEmpty<Vec<u8>>;
+
+/// Local time in seconds since epoch.
+pub type Timestamp = u64;
+
+/// A unique identifier for a history entry.
+pub type EntryId = Oid;
+
 #[derive(Clone, Debug)]
-pub struct Change<Resource, Id, Signature> {
+pub struct Entry<Resource, Id, Signature> {
     /// The content address of the `Change` itself.
     pub id: Id,
     /// The content address of the tree of the `Change`.
@@ -75,7 +82,7 @@ pub struct Change<Resource, Id, Signature> {
     pub timestamp: Timestamp,
 }
 
-impl<Resource, Id, S> fmt::Display for Change<Resource, Id, S>
+impl<Resource, Id, S> fmt::Display for Entry<Resource, Id, S>
 where
     Id: fmt::Display,
 {
@@ -84,7 +91,7 @@ where
     }
 }
 
-impl<Resource, Id, Signatures> Change<Resource, Id, Signatures> {
+impl<Resource, Id, Signatures> Entry<Resource, Id, Signatures> {
     pub fn id(&self) -> &Id {
         &self.id
     }
@@ -102,7 +109,7 @@ impl<Resource, Id, Signatures> Change<Resource, Id, Signatures> {
     }
 }
 
-impl<R, Id> Change<R, Id, signatures::Signatures>
+impl<R, Id> Entry<R, Id, signatures::Signatures>
 where
     Id: AsRef<[u8]>,
 {
@@ -113,13 +120,17 @@ where
     }
 }
 
-impl<R, Id> Change<R, Id, signatures::ExtendedSignature>
+impl<R, Id> Entry<R, Id, signatures::ExtendedSignature>
 where
     Id: AsRef<[u8]>,
 {
     pub fn valid_signatures(&self) -> bool {
         self.signature.verify(self.revision.as_ref())
     }
+
+    pub fn author(&self) -> &crypto::PublicKey {
+        &self.signature.key
+    }
 }
 
 #[derive(Clone, Debug, Hash, PartialEq, Eq, Serialize, Deserialize)]
diff --git a/radicle-cob/src/change_graph.rs b/radicle-cob/src/change_graph.rs
index 8bae80ff..9045ebbc 100644
--- a/radicle-cob/src/change_graph.rs
+++ b/radicle-cob/src/change_graph.rs
@@ -7,14 +7,14 @@ use git_ext::Oid;
 use radicle_dag::Dag;
 
 use crate::{
-    change, history::EntryId, object, signatures::ExtendedSignature, Change, CollaborativeObject,
-    Entry, History, ObjectId, TypeName,
+    change, history::EntryId, object, signatures::ExtendedSignature, CollaborativeObject, Entry,
+    History, ObjectId, TypeName,
 };
 
 /// The graph of changes for a particular collaborative object
 pub(super) struct ChangeGraph {
     object_id: ObjectId,
-    graph: Dag<Oid, Change>,
+    graph: Dag<Oid, Entry>,
 }
 
 impl ChangeGraph {
@@ -96,20 +96,7 @@ impl ChangeGraph {
                 if !change.valid_signatures() {
                     return ControlFlow::Break(graph);
                 }
-                let entry = Entry::new(
-                    *change.id(),
-                    change.signature.key,
-                    change.resource,
-                    change.contents().clone(),
-                    change
-                        .parents
-                        .iter()
-                        .cloned()
-                        .map(|oid| oid.into())
-                        .collect(),
-                    change.timestamp,
-                    change.manifest.clone(),
-                );
+                let entry = change.value.clone();
                 let id = *entry.id();
 
                 graph.node(id, entry);
@@ -141,7 +128,7 @@ impl ChangeGraph {
 }
 
 struct GraphBuilder {
-    graph: Dag<Oid, Change>,
+    graph: Dag<Oid, Entry>,
 }
 
 impl Default for GraphBuilder {
@@ -157,7 +144,7 @@ impl GraphBuilder {
         &mut self,
         storage: &S,
         commit_id: Oid,
-        change: Change,
+        change: Entry,
     ) -> Result<Vec<(Oid, Oid)>, S::LoadError>
     where
         S: change::Storage<ObjectId = Oid, Parent = Oid, Signatures = ExtendedSignature>,
diff --git a/radicle-cob/src/history.rs b/radicle-cob/src/history.rs
index 82194ecc..fd7ca417 100644
--- a/radicle-cob/src/history.rs
+++ b/radicle-cob/src/history.rs
@@ -3,13 +3,9 @@
 use std::{cmp::Ordering, collections::BTreeSet, ops::ControlFlow};
 
 use git_ext::Oid;
-use radicle_crypto::PublicKey;
 use radicle_dag::Dag;
 
-pub mod entry;
-pub use entry::{Contents, Entry, EntryId, Timestamp};
-
-use crate::Manifest;
+pub use crate::change::{Contents, Entry, EntryId, Timestamp};
 
 /// The DAG of changes making up the history of a collaborative object.
 #[derive(Clone, Debug)]
@@ -36,32 +32,11 @@ impl History {
         Self { root, graph }
     }
 
-    pub fn new_from_root<Id>(
-        id: Id,
-        actor: PublicKey,
-        resource: Oid,
-        contents: Contents,
-        timestamp: Timestamp,
-        manifest: Manifest,
-    ) -> Self
-    where
-        Id: Into<EntryId>,
-    {
-        let id = id.into();
-        let root = Entry {
-            id,
-            actor,
-            resource,
-            contents,
-            parents: vec![],
-            timestamp,
-            manifest,
-        };
+    /// Create a new history from a root entry.
+    pub fn new_from_root(root: Entry) -> Self {
+        let id = *root.id();
 
-        Self {
-            root: id,
-            graph: Dag::root(id, root),
-        }
+        Self::new(id, Dag::root(id, root))
     }
 
     /// Get the current history timestamp.
@@ -69,17 +44,14 @@ impl History {
     pub fn timestamp(&self) -> Timestamp {
         self.graph
             .tips()
-            .map(|(_, n)| n.timestamp())
+            .map(|(_, n)| n.timestamp)
             .max()
             .unwrap_or_default()
     }
 
     /// Get all the tips of the graph.
     pub fn tips(&self) -> BTreeSet<Oid> {
-        self.graph
-            .tips()
-            .map(|(_, entry)| (*entry.id()).into())
-            .collect()
+        self.graph.tips().map(|(_, entry)| *entry.id()).collect()
     }
 
     /// A topological (parents before children) traversal of the dependency
@@ -109,34 +81,14 @@ impl History {
     }
 
     /// Extend this history with a new entry.
-    pub fn extend<Id>(
-        &mut self,
-        new_id: Id,
-        new_actor: PublicKey,
-        new_resource: Oid,
-        new_contents: Contents,
-        new_parents: Vec<EntryId>,
-        new_timestamp: Timestamp,
-        manifest: Manifest,
-    ) where
-        Id: Into<EntryId>,
-    {
+    pub fn extend(&mut self, change: Entry) {
         let tips = self.tips();
-        let new_id = new_id.into();
-        let new_entry = Entry::new(
-            new_id,
-            new_actor,
-            new_resource,
-            new_contents,
-            new_parents,
-            new_timestamp,
-            manifest,
-        );
+        let id = *change.id();
 
-        self.graph.node(new_id, new_entry);
+        self.graph.node(id, change);
 
         for tip in tips {
-            self.graph.dependency(new_id, (*tip).into());
+            self.graph.dependency(id, (*tip).into());
         }
     }
 
diff --git a/radicle-cob/src/history/entry.rs b/radicle-cob/src/history/entry.rs
deleted file mode 100644
index 4a3a3b2c..00000000
--- a/radicle-cob/src/history/entry.rs
+++ /dev/null
@@ -1,162 +0,0 @@
-// Copyright © 2021 The Radicle Link Contributors
-
-use std::fmt;
-use std::ops::Deref;
-use std::str::FromStr;
-
-use git_ext::Oid;
-use nonempty::NonEmpty;
-use radicle_crypto::PublicKey;
-use serde::{Deserialize, Serialize};
-
-use crate::{object, Manifest, ObjectId, Version};
-
-/// Entry contents.
-/// This is the change payload.
-pub type Contents = NonEmpty<Vec<u8>>;
-
-/// Local time in seconds since epoch.
-pub type Timestamp = u64;
-
-/// A unique identifier for a history entry.
-#[derive(Clone, Copy, Debug, PartialEq, Hash, Eq, PartialOrd, Ord, Serialize, Deserialize)]
-pub struct EntryId(Oid);
-
-impl fmt::Display for EntryId {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        write!(f, "{}", self.0)
-    }
-}
-
-impl FromStr for EntryId {
-    type Err = git_ext::Error;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let oid = git_ext::Oid::try_from(s)?;
-
-        Ok(Self(oid))
-    }
-}
-
-impl From<git2::Oid> for EntryId {
-    fn from(id: git2::Oid) -> Self {
-        Self(id.into())
-    }
-}
-
-impl From<Oid> for EntryId {
-    fn from(id: Oid) -> Self {
-        Self(id)
-    }
-}
-
-impl From<EntryId> for Oid {
-    fn from(EntryId(id): EntryId) -> Self {
-        id
-    }
-}
-
-impl From<&EntryId> for object::ObjectId {
-    fn from(EntryId(id): &EntryId) -> Self {
-        id.into()
-    }
-}
-
-impl From<ObjectId> for EntryId {
-    fn from(id: ObjectId) -> Self {
-        Self(*id)
-    }
-}
-
-impl Deref for EntryId {
-    type Target = Oid;
-
-    fn deref(&self) -> &Self::Target {
-        &self.0
-    }
-}
-
-/// One entry in the dependency graph for a change
-#[derive(Clone, Debug, PartialEq, Eq, Hash)]
-pub struct Entry {
-    /// The identifier for this entry
-    pub(super) id: EntryId,
-    /// The actor that authored this entry.
-    pub(super) actor: PublicKey,
-    /// The content-address for the resource this entry lives under.
-    /// If the resource was updated, this should point to its latest version.
-    pub(super) resource: Oid,
-    /// Parent entries.
-    pub(super) parents: Vec<EntryId>,
-    /// The contents of this entry.
-    pub(super) contents: Contents,
-    /// The entry timestamp, as seconds since epoch.
-    pub(super) timestamp: Timestamp,
-    /// COB manifest.
-    pub(super) manifest: Manifest,
-}
-
-impl Entry {
-    pub fn new<Id>(
-        id: Id,
-        actor: PublicKey,
-        resource: Oid,
-        contents: Contents,
-        parents: Vec<EntryId>,
-        timestamp: Timestamp,
-        manifest: Manifest,
-    ) -> Self
-    where
-        Id: Into<EntryId>,
-    {
-        Self {
-            id: id.into(),
-            actor,
-            resource,
-            contents,
-            timestamp,
-            parents,
-            manifest,
-        }
-    }
-
-    /// The current `Oid` of the resource this change lives under.
-    pub fn resource(&self) -> Oid {
-        self.resource
-    }
-
-    /// Parent entries.
-    pub fn parents(&self) -> &[EntryId] {
-        &self.parents
-    }
-
-    /// The public key of the actor.
-    pub fn actor(&self) -> &PublicKey {
-        &self.actor
-    }
-
-    /// The COB version of this entry.
-    pub fn version(&self) -> &Version {
-        &self.manifest.version
-    }
-
-    /// The COB manifest.
-    pub fn manifest(&self) -> &Manifest {
-        &self.manifest
-    }
-
-    /// The entry timestamp.
-    pub fn timestamp(&self) -> Timestamp {
-        self.timestamp
-    }
-
-    /// The contents of this change
-    pub fn contents(&self) -> &Contents {
-        &self.contents
-    }
-
-    /// Entry ID.
-    pub fn id(&self) -> &EntryId {
-        &self.id
-    }
-}
diff --git a/radicle-cob/src/lib.rs b/radicle-cob/src/lib.rs
index 61d683ac..d7068095 100644
--- a/radicle-cob/src/lib.rs
+++ b/radicle-cob/src/lib.rs
@@ -6,9 +6,6 @@
 //! Collaborative objects are graphs of CRDTs. The current CRDTs that
 //! is intended to be used are specifically [automerge] CRDTs.
 //!
-//! The initial design is proposed at [RFC-0662], and this
-//! implementation keeps to most of its design principle.
-//!
 //! ## Basic Types
 //!
 //! The basic types that are found in `radicle-cob` are:
@@ -55,15 +52,14 @@
 //! automerge document and deserialize into an application defined
 //! object.
 //!
-//! This traversal is also the point at which the [`Entry::actor`]
+//! This traversal is also the point at which the [`Entry::author`]
 //! and [`Entry::resource`] can be retrieved to apply any kind of
-//! filtering logic. For example, a specific `actor`'s change may be
+//! filtering logic. For example, a specific `author`'s change may be
 //! egregious, spouting terrible libel about Radicle. It is at this
 //! point that the `actor`'s change can be filtered out from the
 //! final product of the traversal.
 //!
 //! [automerge]: https://automerge.org
-//! [RFC-0662]: https://github.com/radicle-dev/radicle-link/blob/master/docs/rfc/0662-collaborative-objects.adoc
 
 #[cfg(test)]
 extern crate qcheck;
@@ -81,11 +77,11 @@ mod change_graph;
 mod trailers;
 
 pub mod change;
-pub use change::store::{Embed, Manifest, Version};
-pub use change::Change;
+pub use change::store::{Contents, Embed, Manifest, Version};
+pub use change::Entry;
 
 pub mod history;
-pub use history::{Contents, Entry, History};
+pub use history::History;
 
 pub mod signatures;
 use signatures::ExtendedSignature;
diff --git a/radicle-cob/src/object/collaboration/create.rs b/radicle-cob/src/object/collaboration/create.rs
index ac0a6a5d..9e0f5c8e 100644
--- a/radicle-cob/src/object/collaboration/create.rs
+++ b/radicle-cob/src/object/collaboration/create.rs
@@ -36,7 +36,7 @@ impl Create {
 /// Create a new [`CollaborativeObject`].
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `signer` is expected to be a cryptographic signing key. This
@@ -74,14 +74,7 @@ where
         .update(identifier, &type_name, &object_id, &init_change)
         .map_err(|err| error::Create::Refs { err: Box::new(err) })?;
 
-    let history = History::new_from_root(
-        *init_change.id(),
-        init_change.signature.key,
-        resource,
-        init_change.contents,
-        init_change.timestamp,
-        init_change.manifest,
-    );
+    let history = History::new_from_root(init_change);
 
     Ok(CollaborativeObject {
         manifest: Manifest::new(type_name, version),
diff --git a/radicle-cob/src/object/collaboration/get.rs b/radicle-cob/src/object/collaboration/get.rs
index 32750bb8..2ef1e2c2 100644
--- a/radicle-cob/src/object/collaboration/get.rs
+++ b/radicle-cob/src/object/collaboration/get.rs
@@ -7,7 +7,7 @@ use super::error;
 /// Get a [`CollaborativeObject`], if it exists.
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `typename` is the type of object to be found, while the
diff --git a/radicle-cob/src/object/collaboration/info.rs b/radicle-cob/src/object/collaboration/info.rs
index 2172efa8..5e885c9f 100644
--- a/radicle-cob/src/object/collaboration/info.rs
+++ b/radicle-cob/src/object/collaboration/info.rs
@@ -27,7 +27,7 @@ pub struct ChangeGraphInfo {
 /// is mostly useful for debugging and testing
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `typename` is the type of object to be found, while the `oid`
diff --git a/radicle-cob/src/object/collaboration/list.rs b/radicle-cob/src/object/collaboration/list.rs
index 0acecea3..05bf6625 100644
--- a/radicle-cob/src/object/collaboration/list.rs
+++ b/radicle-cob/src/object/collaboration/list.rs
@@ -7,7 +7,7 @@ use super::error;
 /// List a set of [`CollaborativeObject`].
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `typename` is the type of objects to be listed.
diff --git a/radicle-cob/src/object/collaboration/remove.rs b/radicle-cob/src/object/collaboration/remove.rs
index 334148a0..13e8d9fd 100644
--- a/radicle-cob/src/object/collaboration/remove.rs
+++ b/radicle-cob/src/object/collaboration/remove.rs
@@ -7,7 +7,7 @@ use super::error;
 /// Remove a [`crate::CollaborativeObject`].
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `typename` is the type of object to be found, while the
diff --git a/radicle-cob/src/object/collaboration/update.rs b/radicle-cob/src/object/collaboration/update.rs
index 294f004f..a4d98da8 100644
--- a/radicle-cob/src/object/collaboration/update.rs
+++ b/radicle-cob/src/object/collaboration/update.rs
@@ -38,7 +38,7 @@ pub struct Update {
 /// Update an existing [`CollaborativeObject`].
 ///
 /// The `storage` is the backing storage for storing
-/// [`crate::Change`]s at content-addressable locations. Please see
+/// [`crate::Entry`]s at content-addressable locations. Please see
 /// [`Store`] for further information.
 ///
 /// The `signer` is expected to be a cryptographic signing key. This
@@ -99,21 +99,14 @@ where
         .update(identifier, typename, &object_id, &change)
         .map_err(|err| error::Update::Refs { err: Box::new(err) })?;
 
-    let parents: Vec<EntryId> = change.parents.into_iter().map(|oid| oid.into()).collect();
+    let parents = change.parents.to_vec();
+    let head = change.id;
 
-    object.history.extend(
-        change.id,
-        change.signature.key,
-        change.resource,
-        change.contents,
-        parents.clone(),
-        change.timestamp,
-        change.manifest,
-    );
+    object.history.extend(change);
 
     Ok(Updated {
         object,
-        head: change.id,
+        head,
         parents,
     })
 }
diff --git a/radicle-cob/src/object/storage.rs b/radicle-cob/src/object/storage.rs
index aeddbce4..5ddb3fad 100644
--- a/radicle-cob/src/object/storage.rs
+++ b/radicle-cob/src/object/storage.rs
@@ -5,7 +5,7 @@ use std::{collections::BTreeMap, error::Error};
 use git_ext::ref_format::RefString;
 use git_ext::Oid;
 
-use crate::change::Change;
+use crate::change::Entry;
 use crate::{ObjectId, TypeName};
 
 /// The [`Reference`]s that refer to the commits that make up a
@@ -78,7 +78,7 @@ pub trait Storage {
         identifier: &Self::Identifier,
         typename: &TypeName,
         object_id: &ObjectId,
-        change: &Change,
+        change: &Entry,
     ) -> Result<(), Self::UpdateError>;
 
     /// Remove a ref to a particular collaborative object
diff --git a/radicle-cob/src/test/storage.rs b/radicle-cob/src/test/storage.rs
index 7c83a2ad..43b4fd8e 100644
--- a/radicle-cob/src/test/storage.rs
+++ b/radicle-cob/src/test/storage.rs
@@ -73,7 +73,7 @@ impl change::Storage for Storage {
         signer: &Signer,
         spec: change::Template<Self::ObjectId>,
     ) -> Result<
-        change::store::Change<Self::Parent, Self::ObjectId, Self::Signatures>,
+        change::store::Entry<Self::Parent, Self::ObjectId, Self::Signatures>,
         Self::StoreError,
     >
     where
@@ -85,10 +85,8 @@ impl change::Storage for Storage {
     fn load(
         &self,
         id: Self::ObjectId,
-    ) -> Result<
-        change::store::Change<Self::Parent, Self::ObjectId, Self::Signatures>,
-        Self::LoadError,
-    > {
+    ) -> Result<change::store::Entry<Self::Parent, Self::ObjectId, Self::Signatures>, Self::LoadError>
+    {
         self.as_raw().load(id)
     }
 
@@ -156,7 +154,7 @@ impl object::Storage for Storage {
         identifier: &Self::Identifier,
         typename: &crate::TypeName,
         object_id: &ObjectId,
-        change: &change::Change,
+        change: &change::Entry,
     ) -> Result<(), Self::UpdateError> {
         let name = format!(
             "refs/rad/{}/cobs/{}/{}",
diff --git a/radicle-cob/src/tests.rs b/radicle-cob/src/tests.rs
index 68506e7b..def62425 100644
--- a/radicle-cob/src/tests.rs
+++ b/radicle-cob/src/tests.rs
@@ -213,7 +213,7 @@ fn traverse_cobs() {
 
     // traverse over the history and filter by changes that were only authorized by terry
     let contents = object.history().traverse(Vec::new(), |mut acc, _, entry| {
-        if entry.actor() == terry_signer.public_key() {
+        if entry.author() == terry_signer.public_key() {
             acc.push(entry.contents().head.clone());
         }
         ControlFlow::Continue(acc)
diff --git a/radicle/src/cob/issue.rs b/radicle/src/cob/issue.rs
index 8900bdba..447c89b5 100644
--- a/radicle/src/cob/issue.rs
+++ b/radicle/src/cob/issue.rs
@@ -129,7 +129,7 @@ impl store::FromHistory for Issue {
         let root = history.root();
 
         // Deprecated. Remove when we drop legacy support.
-        if root.manifest().is_legacy() {
+        if root.manifest.is_legacy() {
             let legacy = super::legacy::issue::Issue::from_history(history, repo)?;
             let issue = legacy.into();
 
@@ -673,10 +673,10 @@ mod test {
         let mut issue_bob = bob_issues.get_mut(&id).unwrap();
 
         issue_bob
-            .comment("Bob's reply", id.into(), vec![], &t.bob.signer)
+            .comment("Bob's reply", *id, vec![], &t.bob.signer)
             .unwrap();
         issue_alice
-            .comment("Alice's reply", id.into(), vec![], &t.alice.signer)
+            .comment("Alice's reply", *id, vec![], &t.alice.signer)
             .unwrap();
 
         assert_eq!(issue_bob.comments().count(), 2);
@@ -704,7 +704,7 @@ mod test {
         t.eve.repo.fetch(&t.alice);
 
         let eve_reply = issue_eve
-            .comment("Eve's reply", id.into(), vec![], &t.eve.signer)
+            .comment("Eve's reply", *id, vec![], &t.eve.signer)
             .unwrap();
 
         t.bob.repo.fetch(&t.eve);
@@ -721,7 +721,7 @@ mod test {
         let (first, _) = issue_bob.comments().next().unwrap();
         let (last, _) = issue_bob.comments().last().unwrap();
 
-        assert_eq!(*first, issue_alice.id.into());
+        assert_eq!(*first, *issue_alice.id);
         assert_eq!(*last, eve_reply);
     }
 
@@ -1212,7 +1212,7 @@ mod test {
         issue
             .comment(
                 "Here's a binary file",
-                issue.id.into(),
+                *issue.id,
                 [embed3.clone()],
                 &node.signer,
             )
diff --git a/radicle/src/cob/op.rs b/radicle/src/cob/op.rs
index 758e93b6..c1524d5f 100644
--- a/radicle/src/cob/op.rs
+++ b/radicle/src/cob/op.rs
@@ -84,11 +84,11 @@ impl From<Entry> for Op<Vec<u8>> {
         Self {
             id: *entry.id(),
             actions: entry.contents().clone(),
-            author: *entry.actor(),
-            parents: entry.parents().to_owned(),
-            timestamp: Timestamp::from_secs(entry.timestamp()),
-            identity: entry.resource(),
-            manifest: entry.manifest().clone(),
+            author: *entry.author(),
+            parents: entry.parents.to_owned(),
+            timestamp: Timestamp::from_secs(entry.timestamp),
+            identity: entry.resource,
+            manifest: entry.manifest.clone(),
         }
     }
 }
@@ -101,13 +101,13 @@ where
 
     fn try_from(entry: &'a Entry) -> Result<Self, Self::Error> {
         let id = *entry.id();
-        let identity = entry.resource();
+        let identity = *entry.resource();
         let actions: Vec<_> = entry
             .contents()
             .iter()
             .map(|blob| serde_json::from_slice(blob.as_slice()))
             .collect::<Result<_, _>>()?;
-        let manifest = entry.manifest().clone();
+        let manifest = entry.manifest.clone();
 
         // SAFETY: Entry is guaranteed to have at least one operation.
         #[allow(clippy::unwrap_used)]
@@ -115,9 +115,9 @@ where
         let op = Op {
             id,
             actions,
-            author: *entry.actor(),
-            timestamp: Timestamp::from_secs(entry.timestamp()),
-            parents: entry.parents().to_owned(),
+            author: *entry.author(),
+            timestamp: Timestamp::from_secs(entry.timestamp),
+            parents: entry.parents.to_owned(),
             identity,
             manifest,
         };
diff --git a/radicle/src/cob/patch.rs b/radicle/src/cob/patch.rs
index a5237ca5..2ed2126d 100644
--- a/radicle/src/cob/patch.rs
+++ b/radicle/src/cob/patch.rs
@@ -469,7 +469,7 @@ impl store::FromHistory for Patch {
         let root = history.root();
 
         // Deprecated. Remove when we drop legacy support.
-        if root.manifest().is_legacy() {
+        if root.manifest.is_legacy() {
             let legacy = super::legacy::patch::Patch::from_history(history, repo)?;
             let patch = legacy.into();
 
@@ -1379,7 +1379,7 @@ where
         revision: RevisionId,
         signer: &G,
     ) -> Result<EntryId, Error> {
-        if revision == RevisionId::from(self.id) {
+        if revision == RevisionId::from(*self.id) {
             return Err(Error::RootRevision(revision));
         }
         self.transaction("Redact revision", signer, |tx| tx.redact(revision))
@@ -2223,7 +2223,7 @@ mod test {
         assert_eq!(patch.revisions().count(), 2);
 
         patch.redact(revision_id, &alice.signer).unwrap();
-        assert_eq!(patch.latest().0, &RevisionId::from(patch_id));
+        assert_eq!(patch.latest().0, &RevisionId::from(*patch_id));
         assert_eq!(patch.revisions().count(), 1);
 
         // The patch's root must always exist.
diff --git a/radicle/src/cob/test.rs b/radicle/src/cob/test.rs
index 103ffef2..c39a9c02 100644
--- a/radicle/src/cob/test.rs
+++ b/radicle/src/cob/test.rs
@@ -2,6 +2,7 @@ use std::marker::PhantomData;
 use std::ops::Deref;
 
 use nonempty::NonEmpty;
+use radicle_crypto::ssh::ExtendedSignature;
 use serde::{Deserialize, Serialize};
 
 use crate::cob::op::Op;
@@ -58,18 +59,24 @@ where
 {
     pub fn new<G: Signer>(action: &T::Action, time: Timestamp, signer: &G) -> HistoryBuilder<T> {
         let resource = arbitrary::oid();
+        let revision = arbitrary::oid();
         let (data, root) = encoded::<T, _>(action, time, [], signer);
         let manifest = Manifest::new(T::type_name().clone(), Version::default());
+        let signature = signer.sign(data.as_slice());
+        let signature = ExtendedSignature::new(*signer.public_key(), signature);
+        let change = Entry {
+            id: root,
+            signature,
+            resource,
+            contents: NonEmpty::new(data),
+            timestamp: time.as_secs(),
+            revision,
+            parents: vec![],
+            manifest,
+        };
 
         Self {
-            history: History::new_from_root(
-                root,
-                *signer.public_key(),
-                resource,
-                NonEmpty::new(data),
-                time.as_secs(),
-                manifest,
-            ),
+            history: History::new_from_root(change),
             time,
             resource,
             witness: PhantomData,
@@ -87,18 +94,23 @@ where
     pub fn commit<G: Signer>(&mut self, action: &T::Action, signer: &G) -> git::ext::Oid {
         let timestamp = self.time;
         let tips = self.tips();
+        let revision = arbitrary::oid();
         let (data, oid) = encoded::<T, _>(action, timestamp, tips, signer);
         let manifest = Manifest::new(T::type_name().clone(), Version::default());
-
-        self.history.extend(
-            oid,
-            *signer.public_key(),
-            self.resource,
-            NonEmpty::new(data),
-            vec![],
-            timestamp.as_secs(),
+        let signature = signer.sign(data.as_slice());
+        let signature = ExtendedSignature::new(*signer.public_key(), signature);
+        let change = Entry {
+            id: oid,
+            signature,
+            resource: self.resource,
+            contents: NonEmpty::new(data),
+            timestamp: timestamp.as_secs(),
+            revision,
+            parents: vec![],
             manifest,
-        );
+        };
+        self.history.extend(change);
+
         oid
     }
 }
diff --git a/radicle/src/storage/git/cob.rs b/radicle/src/storage/git/cob.rs
index eb58e635..7a1858c5 100644
--- a/radicle/src/storage/git/cob.rs
+++ b/radicle/src/storage/git/cob.rs
@@ -58,14 +58,14 @@ impl change::Storage for Repository {
         parents: Vec<Self::Parent>,
         signer: &Signer,
         spec: change::Template<Self::ObjectId>,
-    ) -> Result<cob::Change, Self::StoreError>
+    ) -> Result<cob::Entry, Self::StoreError>
     where
         Signer: crypto::Signer,
     {
         self.backend.store(authority, parents, signer, spec)
     }
 
-    fn load(&self, id: Self::ObjectId) -> Result<cob::Change, Self::LoadError> {
+    fn load(&self, id: Self::ObjectId) -> Result<cob::Entry, Self::LoadError> {
         self.backend.load(id)
     }
 
@@ -139,7 +139,7 @@ impl cob::object::Storage for Repository {
         identifier: &Self::Identifier,
         typename: &cob::TypeName,
         object_id: &cob::ObjectId,
-        change: &cob::Change,
+        change: &cob::Entry,
     ) -> Result<(), Self::UpdateError> {
         self.backend.reference(
             git::refs::storage::cob(identifier, typename, object_id).as_str(),
@@ -202,14 +202,14 @@ impl<'a> change::Storage for DraftStore<'a> {
         parents: Vec<Self::Parent>,
         signer: &Signer,
         spec: change::Template<Self::ObjectId>,
-    ) -> Result<cob::Change, Self::StoreError>
+    ) -> Result<cob::Entry, Self::StoreError>
     where
         Signer: crypto::Signer,
     {
         self.repo.backend.store(authority, parents, signer, spec)
     }
 
-    fn load(&self, id: Self::ObjectId) -> Result<cob::Change, Self::LoadError> {
+    fn load(&self, id: Self::ObjectId) -> Result<cob::Entry, Self::LoadError> {
         self.repo.backend.load(id)
     }
 
@@ -387,7 +387,7 @@ impl<'a> cob::object::Storage for DraftStore<'a> {
         identifier: &Self::Identifier,
         typename: &cob::TypeName,
         object_id: &cob::ObjectId,
-        change: &cob::Change,
+        change: &cob::Entry,
     ) -> Result<(), Self::UpdateError> {
         self.repo.backend.reference(
             git::refs::storage::draft::cob(identifier, typename, object_id).as_str(),
diff --git a/radicle/src/test/arbitrary.rs b/radicle/src/test/arbitrary.rs
index 9c776699..84bebdbc 100644
--- a/radicle/src/test/arbitrary.rs
+++ b/radicle/src/test/arbitrary.rs
@@ -28,7 +28,7 @@ pub fn oid() -> storage::Oid {
 }
 
 pub fn entry_id() -> cob::EntryId {
-    self::oid().into()
+    self::oid()
 }
 
 pub fn refstring(len: usize) -> git::RefString {