From 985b0af3f6230a0d36e0b413f42dc9a3c1522fe6 Mon Sep 17 00:00:00 2001
From: Fintan Halpenny <fintan.halpenny@gmail.com>
Date: Thu, 8 Feb 2024 16:52:05 +0000
Subject: [PATCH] radicle: implement caching for issues and patches

Implement caching for the `Issue` and `Patch` COB. This is achieved by
having the `Transaction::initial` and `Transaction::commit` methods
take a cache which can update the newly created/updated object. The
`Store::remove` method also takes the cache for removing the object
from the cache, as well as the repository.

This meant that the `*Mut` types for the respective COBs are required
to carry a cache alongside the repository store. Identities will not
be cached, and so this is always set to `NoCache` -- which performs no
caching, and always succeeds.

To perform cache reading for issues and patches, the `cache::Issues`
and `cache::Patches` traits are introduced. They capture the minimal
amount of methods that are needed for the `rad issue` and `rad patch`
CLI commands.

The implementor for each of these traits is there respective `Cache`
types, which combines their backing repository store and the SQLite
database. They both provide convenience methods:
- `create` (and `draft` for patches)
- `get_mut`
- `remove`
which can be used instead of their repository store counterparts.

All uses of the repository stores (where needed) are replaced with
`Cache` types.

Signed-off-by: Fintan Halpenny <fintan.halpenny@gmail.com>
X-Clacks-Overhead: GNU Terry Pratchett
---
 radicle-cli/src/commands/clone.rs          |   7 +-
 radicle-cli/src/commands/inbox.rs          |  12 +-
 radicle-cli/src/commands/issue.rs          |  45 +-
 radicle-cli/src/commands/patch.rs          |  45 +-
 radicle-cli/src/commands/patch/archive.rs  |   3 +-
 radicle-cli/src/commands/patch/assign.rs   |   2 +-
 radicle-cli/src/commands/patch/checkout.rs |   7 +-
 radicle-cli/src/commands/patch/comment.rs  |  10 +-
 radicle-cli/src/commands/patch/delete.rs   |   3 +-
 radicle-cli/src/commands/patch/diff.rs     |   3 +-
 radicle-cli/src/commands/patch/edit.rs     |   8 +-
 radicle-cli/src/commands/patch/label.rs    |   2 +-
 radicle-cli/src/commands/patch/list.rs     |  16 +-
 radicle-cli/src/commands/patch/ready.rs    |   3 +-
 radicle-cli/src/commands/patch/redact.rs   |   8 +-
 radicle-cli/src/commands/patch/review.rs   |   5 +-
 radicle-cli/src/commands/patch/show.rs     |   2 +-
 radicle-cli/src/commands/patch/update.rs   |   8 +-
 radicle-cli/src/commands/stats.rs          |   8 +-
 radicle-cli/tests/commands.rs              |   6 +-
 radicle-httpd/src/api.rs                   |   6 +-
 radicle-httpd/src/api/error.rs             |  13 +
 radicle-httpd/src/api/v1/delegates.rs      |   9 +-
 radicle-httpd/src/api/v1/projects.rs       |  34 +-
 radicle-httpd/src/test.rs                  |  10 +-
 radicle-node/src/runtime.rs                |   7 +-
 radicle-node/src/test/environment.rs       |   5 +-
 radicle-node/src/tests.rs                  |   2 +-
 radicle-node/src/worker.rs                 |  19 +-
 radicle-node/src/worker/fetch.rs           |  95 +-
 radicle-node/src/worker/fetch/error.rs     |  28 +-
 radicle-remote-helper/src/lib.rs           |   2 +-
 radicle-remote-helper/src/list.rs          |  20 +-
 radicle-remote-helper/src/push.rs          |  67 +-
 radicle-tools/src/rad-merge.rs             |   4 +-
 radicle/src/cob.rs                         |  25 +-
 radicle/src/cob/cache.rs                   |  53 +-
 radicle/src/cob/issue.rs                   | 175 ++--
 radicle/src/cob/issue/cache.rs             | 685 +++++++++++++++
 radicle/src/cob/patch.rs                   | 382 ++++++--
 radicle/src/cob/patch/cache.rs             | 974 +++++++++++++++++++++
 radicle/src/cob/store.rs                   |  23 +-
 radicle/src/profile.rs                     |  69 +-
 radicle/src/storage.rs                     |  11 +
 44 files changed, 2632 insertions(+), 289 deletions(-)
 create mode 100644 radicle/src/cob/issue/cache.rs
 create mode 100644 radicle/src/cob/patch/cache.rs

diff --git a/radicle-cli/src/commands/clone.rs b/radicle-cli/src/commands/clone.rs
index f46fe015..8e5bb00a 100644
--- a/radicle-cli/src/commands/clone.rs
+++ b/radicle-cli/src/commands/clone.rs
@@ -5,9 +5,10 @@ use std::str::FromStr;
 use std::time;
 
 use anyhow::anyhow;
+use radicle::issue::cache::Issues as _;
+use radicle::patch::cache::Patches as _;
 use thiserror::Error;
 
-use radicle::cob;
 use radicle::git::raw;
 use radicle::identity::doc;
 use radicle::identity::doc::{DocError, RepoId};
@@ -186,8 +187,8 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
     info.push([term::format::bold(proj.name()).into()]);
     info.push([term::format::italic(proj.description()).into()]);
 
-    let issues = cob::issue::Issues::open(&repo)?.counts()?;
-    let patches = cob::patch::Patches::open(&repo)?.counts()?;
+    let issues = profile.issues(&repo)?.counts()?;
+    let patches = profile.patches(&repo)?.counts()?;
 
     info.push([term::Line::spaced([
         term::format::tertiary(issues.open).into(),
diff --git a/radicle-cli/src/commands/inbox.rs b/radicle-cli/src/commands/inbox.rs
index 2997765c..620584c0 100644
--- a/radicle-cli/src/commands/inbox.rs
+++ b/radicle-cli/src/commands/inbox.rs
@@ -6,10 +6,10 @@ use anyhow::anyhow;
 
 use localtime::LocalTime;
 use radicle::identity::Identity;
-use radicle::issue::Issues;
+use radicle::issue::cache::Issues as _;
 use radicle::node::notifications;
 use radicle::node::notifications::*;
-use radicle::patch::Patches;
+use radicle::patch::cache::Patches as _;
 use radicle::prelude::{Profile, RepoId};
 use radicle::storage::{ReadRepository, ReadStorage};
 use radicle::{cob, Storage};
@@ -233,8 +233,8 @@ where
     let (_, head) = repo.head()?;
     let doc = repo.identity_doc()?;
     let proj = doc.project()?;
-    let issues = Issues::open(&repo)?;
-    let patches = Patches::open(&repo)?;
+    let issues = profile.issues(&repo)?;
+    let patches = profile.patches(&repo)?;
 
     let mut notifs = notifs.by_repo(&rid, sort_by.field)?.collect::<Vec<_>>();
     if !sort_by.reverse {
@@ -406,13 +406,13 @@ fn show(
 
     match n.kind {
         NotificationKind::Cob { type_name, id } if type_name == *cob::issue::TYPENAME => {
-            let issues = Issues::open(&repo)?;
+            let issues = profile.issues(&repo)?;
             let issue = issues.get(&id)?.unwrap();
 
             term::issue::show(&issue, &id, term::issue::Format::default(), profile)?;
         }
         NotificationKind::Cob { type_name, id } if type_name == *cob::patch::TYPENAME => {
-            let patches = Patches::open(&repo)?;
+            let patches = profile.patches(&repo)?;
             let patch = patches.get(&id)?.unwrap();
 
             term::patch::show(&patch, &id, false, &repo, None, profile)?;
diff --git a/radicle-cli/src/commands/issue.rs b/radicle-cli/src/commands/issue.rs
index 8554ca6f..cacb394c 100644
--- a/radicle-cli/src/commands/issue.rs
+++ b/radicle-cli/src/commands/issue.rs
@@ -6,13 +6,14 @@ use anyhow::{anyhow, Context as _};
 
 use radicle::cob::common::{Label, Reaction};
 use radicle::cob::issue;
-use radicle::cob::issue::{CloseReason, Issues, State};
+use radicle::cob::issue::{CloseReason, State};
 use radicle::cob::thread;
 use radicle::crypto::Signer;
+use radicle::issue::cache::Issues as _;
 use radicle::prelude::Did;
 use radicle::profile;
 use radicle::storage;
-use radicle::storage::{WriteRepository, WriteStorage};
+use radicle::storage::{ReadRepository, WriteRepository, WriteStorage};
 use radicle::Profile;
 use radicle::{cob, Node};
 
@@ -425,7 +426,7 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
                 | Operation::Label { .. }
         );
 
-    let mut issues = Issues::open(&repo)?;
+    let mut issues = profile.issues_mut(&repo)?;
 
     match options.op {
         Operation::Edit {
@@ -546,7 +547,7 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
             issue.label(labels, &signer)?;
         }
         Operation::List { assigned, state } => {
-            list(&issues, &assigned, &state, &profile)?;
+            list(issues, &assigned, &state, &profile)?;
         }
         Operation::Delete { id } => {
             let id = id.resolve(&repo.backend)?;
@@ -562,13 +563,16 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
     Ok(())
 }
 
-fn list<R: WriteRepository + cob::Store>(
-    issues: &Issues<R>,
+fn list<C>(
+    cache: C,
     assigned: &Option<Assigned>,
     state: &Option<State>,
     profile: &profile::Profile,
-) -> anyhow::Result<()> {
-    if issues.is_empty()? {
+) -> anyhow::Result<()>
+where
+    C: issue::cache::Issues,
+{
+    if cache.is_empty()? {
         term::print(term::format::italic("Nothing to show."));
         return Ok(());
     }
@@ -580,7 +584,8 @@ fn list<R: WriteRepository + cob::Store>(
     };
 
     let mut all = Vec::new();
-    for result in issues.all()? {
+    let issues = cache.list()?;
+    for result in issues {
         let Ok((id, issue)) = result else {
             // Skip issues that failed to load.
             continue;
@@ -664,16 +669,20 @@ fn list<R: WriteRepository + cob::Store>(
     Ok(())
 }
 
-fn open<R: WriteRepository + cob::Store, G: Signer>(
+fn open<R, G>(
     title: Option<String>,
     description: Option<String>,
     labels: Vec<Label>,
     assignees: Vec<Did>,
     options: &Options,
-    issues: &mut Issues<R>,
+    cache: &mut issue::Cache<issue::Issues<'_, R>, cob::cache::StoreWriter>,
     signer: &G,
     profile: &Profile,
-) -> anyhow::Result<()> {
+) -> anyhow::Result<()>
+where
+    R: ReadRepository + WriteRepository + cob::Store,
+    G: Signer,
+{
     let (title, description) = if let (Some(t), Some(d)) = (title.as_ref(), description.as_ref()) {
         (t.to_owned(), d.to_owned())
     } else if let Some((t, d)) = term::issue::get_title_description(title, description)? {
@@ -681,7 +690,7 @@ fn open<R: WriteRepository + cob::Store, G: Signer>(
     } else {
         anyhow::bail!("aborting issue creation due to empty title or description");
     };
-    let issue = issues.create(
+    let issue = cache.create(
         &title,
         description,
         labels.as_slice(),
@@ -696,14 +705,18 @@ fn open<R: WriteRepository + cob::Store, G: Signer>(
     Ok(())
 }
 
-fn edit<'a, 'g, R: WriteRepository + cob::Store, G: radicle::crypto::Signer>(
-    issues: &'a mut issue::Issues<'a, R>,
+fn edit<'a, 'g, R, G>(
+    issues: &'g mut issue::Cache<issue::Issues<'a, R>, cob::cache::StoreWriter>,
     repo: &storage::git::Repository,
     id: Rev,
     title: Option<String>,
     description: Option<String>,
     signer: &G,
-) -> anyhow::Result<issue::IssueMut<'a, 'g, R>> {
+) -> anyhow::Result<issue::IssueMut<'a, 'g, R, cob::cache::StoreWriter>>
+where
+    R: WriteRepository + ReadRepository + cob::Store,
+    G: radicle::crypto::Signer,
+{
     let id = id.resolve(&repo.backend)?;
     let mut issue = issues.get_mut(&id)?;
     let (root, _) = issue.root();
diff --git a/radicle-cli/src/commands/patch.rs b/radicle-cli/src/commands/patch.rs
index 3fe7b47c..4a0f08ca 100644
--- a/radicle-cli/src/commands/patch.rs
+++ b/radicle-cli/src/commands/patch.rs
@@ -34,6 +34,7 @@ use anyhow::anyhow;
 
 use radicle::cob::patch::PatchId;
 use radicle::cob::{patch, Label};
+use radicle::patch::cache::Patches as _;
 use radicle::storage::git::transport;
 use radicle::{prelude::*, Node};
 
@@ -179,27 +180,6 @@ pub struct LabelOptions {
     pub delete: BTreeSet<Label>,
 }
 
-pub struct Filter(fn(&patch::State) -> bool);
-
-impl Filter {
-    /// Match everything.
-    fn all() -> Self {
-        Self(|_| true)
-    }
-}
-
-impl Default for Filter {
-    fn default() -> Self {
-        Self(|state| matches!(state, patch::State::Open { .. }))
-    }
-}
-
-impl std::fmt::Debug for Filter {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "Filter(..)")
-    }
-}
-
 #[derive(Debug)]
 pub enum Operation {
     Show {
@@ -250,7 +230,7 @@ pub enum Operation {
         opts: LabelOptions,
     },
     List {
-        filter: Filter,
+        filter: Option<patch::Status>,
     },
     Edit {
         patch_id: Rev,
@@ -311,7 +291,7 @@ impl Args for Options {
         let mut patch_id = None;
         let mut revision_id = None;
         let mut message = Message::default();
-        let mut filter = Filter::default();
+        let mut filter = Some(patch::Status::Open);
         let mut diff = false;
         let mut debug = false;
         let mut undo = false;
@@ -487,19 +467,19 @@ impl Args for Options {
 
                 // List options.
                 Long("all") => {
-                    filter = Filter::all();
+                    filter = None;
                 }
                 Long("draft") => {
-                    filter = Filter(|s| s == &patch::State::Draft);
+                    filter = Some(patch::Status::Draft);
                 }
                 Long("archived") => {
-                    filter = Filter(|s| s == &patch::State::Archived);
+                    filter = Some(patch::Status::Archived);
                 }
                 Long("merged") => {
-                    filter = Filter(|s| matches!(s, patch::State::Merged { .. }));
+                    filter = Some(patch::Status::Merged);
                 }
                 Long("open") => {
-                    filter = Filter(|s| matches!(s, patch::State::Open { .. }));
+                    filter = Some(patch::Status::Open);
                 }
                 Long("authored") => {
                     authored = true;
@@ -662,12 +642,12 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
     transport::local::register(profile.storage.clone());
 
     match options.op {
-        Operation::List { filter: Filter(f) } => {
+        Operation::List { filter } => {
             let mut authors: BTreeSet<Did> = options.authors.iter().cloned().collect();
             if options.authored {
                 authors.insert(profile.did());
             }
-            list::run(f, authors, &repository, &profile)?;
+            list::run(filter.as_ref(), authors, &repository, &profile)?;
         }
         Operation::Show {
             patch_id,
@@ -694,7 +674,7 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
                 .map(|rev| rev.resolve::<radicle::git::Oid>(&repository.backend))
                 .transpose()?
                 .map(patch::RevisionId::from);
-            diff::run(&patch_id, revision_id, &repository)?;
+            diff::run(&patch_id, revision_id, &repository, &profile)?;
         }
         Operation::Update {
             ref patch_id,
@@ -742,6 +722,7 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
                 revision_id,
                 &repository,
                 &workdir,
+                &profile,
                 opts,
             )?;
         }
@@ -801,7 +782,7 @@ pub fn run(options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
             label::run(&patch_id, add, delete, &profile, &repository)?;
         }
         Operation::Set { patch_id } => {
-            let patches = radicle::cob::patch::Patches::open(&repository)?;
+            let patches = profile.patches(&repository)?;
             let patch_id = patch_id.resolve(&repository.backend)?;
             let patch = patches
                 .get(&patch_id)?
diff --git a/radicle-cli/src/commands/patch/archive.rs b/radicle-cli/src/commands/patch/archive.rs
index 4d9b4ef9..eacb5070 100644
--- a/radicle-cli/src/commands/patch/archive.rs
+++ b/radicle-cli/src/commands/patch/archive.rs
@@ -1,12 +1,11 @@
 use super::*;
 
-use radicle::cob::patch;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
 
 pub fn run(patch_id: &PatchId, profile: &Profile, repository: &Repository) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(mut patch) = patches.get_mut(patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/assign.rs b/radicle-cli/src/commands/patch/assign.rs
index d3a47901..c96db74c 100644
--- a/radicle-cli/src/commands/patch/assign.rs
+++ b/radicle-cli/src/commands/patch/assign.rs
@@ -15,7 +15,7 @@ pub fn run(
     repository: &Repository,
 ) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = radicle::cob::patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(mut patch) = patches.get_mut(patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/checkout.rs b/radicle-cli/src/commands/patch/checkout.rs
index 1546840e..815bfae3 100644
--- a/radicle-cli/src/commands/patch/checkout.rs
+++ b/radicle-cli/src/commands/patch/checkout.rs
@@ -4,9 +4,10 @@ use git_ref_format::Qualified;
 use radicle::cob::patch;
 use radicle::cob::patch::RevisionId;
 use radicle::git::RefString;
+use radicle::patch::cache::Patches as _;
 use radicle::patch::PatchId;
 use radicle::storage::git::Repository;
-use radicle::{git, rad};
+use radicle::{git, rad, Profile};
 
 use crate::terminal as term;
 
@@ -33,10 +34,10 @@ pub fn run(
     revision_id: Option<RevisionId>,
     stored: &Repository,
     working: &git::raw::Repository,
+    profile: &Profile,
     opts: Options,
 ) -> anyhow::Result<()> {
-    let patches = patch::Patches::open(stored)?;
-
+    let patches = profile.patches(stored)?;
     let patch = patches
         .get(patch_id)?
         .ok_or_else(|| anyhow!("Patch `{patch_id}` not found"))?;
diff --git a/radicle-cli/src/commands/patch/comment.rs b/radicle-cli/src/commands/patch/comment.rs
index 99d77dbf..cf377369 100644
--- a/radicle-cli/src/commands/patch/comment.rs
+++ b/radicle-cli/src/commands/patch/comment.rs
@@ -3,6 +3,7 @@ use super::*;
 use radicle::cob;
 use radicle::cob::patch;
 use radicle::cob::thread::CommentId;
+use radicle::patch::ByRevision;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
 
@@ -19,10 +20,15 @@ pub fn run(
     profile: &Profile,
 ) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = patch::Patches::open(repo)?;
+    let mut patches = profile.patches_mut(repo)?;
 
     let revision_id = revision_id.resolve::<cob::EntryId>(&repo.backend)?;
-    let (patch_id, patch, revision_id, revision) = patches
+    let ByRevision {
+        id: patch_id,
+        patch,
+        revision_id,
+        revision,
+    } = patches
         .find_by_revision(&patch::RevisionId::from(revision_id))?
         .ok_or_else(|| anyhow!("Patch revision `{revision_id}` not found"))?;
     let mut patch = patch::PatchMut::new(patch_id, patch, &mut patches);
diff --git a/radicle-cli/src/commands/patch/delete.rs b/radicle-cli/src/commands/patch/delete.rs
index 9e3d185d..4d2c0e63 100644
--- a/radicle-cli/src/commands/patch/delete.rs
+++ b/radicle-cli/src/commands/patch/delete.rs
@@ -1,4 +1,3 @@
-use radicle::cob::patch;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
 
@@ -6,7 +5,7 @@ use super::*;
 
 pub fn run(patch_id: &PatchId, profile: &Profile, repository: &Repository) -> anyhow::Result<()> {
     let signer = &term::signer(profile)?;
-    let patches = patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     patches.remove(patch_id, signer)?;
 
     Ok(())
diff --git a/radicle-cli/src/commands/patch/diff.rs b/radicle-cli/src/commands/patch/diff.rs
index a7030532..560caef2 100644
--- a/radicle-cli/src/commands/patch/diff.rs
+++ b/radicle-cli/src/commands/patch/diff.rs
@@ -9,8 +9,9 @@ pub fn run(
     patch_id: &PatchId,
     revision_id: Option<patch::RevisionId>,
     stored: &Repository,
+    profile: &Profile,
 ) -> anyhow::Result<()> {
-    let patches = patch::Patches::open(stored)?;
+    let patches = profile.patches(stored)?;
     let Some(patch) = patches.get(patch_id)? else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/edit.rs b/radicle-cli/src/commands/patch/edit.rs
index 3bd660e7..3b49f79e 100644
--- a/radicle-cli/src/commands/patch/edit.rs
+++ b/radicle-cli/src/commands/patch/edit.rs
@@ -1,6 +1,6 @@
 use super::*;
 
-use radicle::cob::{patch, resolve_embed};
+use radicle::cob::{self, patch, resolve_embed};
 use radicle::crypto;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
@@ -15,7 +15,7 @@ pub fn run(
     repository: &Repository,
 ) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(patch) = patches.get_mut(patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
@@ -29,7 +29,7 @@ pub fn run(
 }
 
 fn edit_root<G>(
-    mut patch: patch::PatchMut<'_, '_, Repository>,
+    mut patch: patch::PatchMut<'_, '_, Repository, cob::cache::StoreWriter>,
     title: String,
     description: String,
     repository: &Repository,
@@ -76,7 +76,7 @@ where
 }
 
 fn edit_revision<G>(
-    mut patch: patch::PatchMut<'_, '_, Repository>,
+    mut patch: patch::PatchMut<'_, '_, Repository, cob::cache::StoreWriter>,
     revision: patch::RevisionId,
     mut title: String,
     description: String,
diff --git a/radicle-cli/src/commands/patch/label.rs b/radicle-cli/src/commands/patch/label.rs
index 128ace01..009c8f45 100644
--- a/radicle-cli/src/commands/patch/label.rs
+++ b/radicle-cli/src/commands/patch/label.rs
@@ -12,7 +12,7 @@ pub fn run(
     repository: &Repository,
 ) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = radicle::cob::patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(mut patch) = patches.get_mut(patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/list.rs b/radicle-cli/src/commands/patch/list.rs
index 16adfe20..a96ee5a8 100644
--- a/radicle-cli/src/commands/patch/list.rs
+++ b/radicle-cli/src/commands/patch/list.rs
@@ -1,7 +1,8 @@
 use std::collections::BTreeSet;
 
 use radicle::cob::patch;
-use radicle::cob::patch::{Patch, PatchId, Patches};
+use radicle::cob::patch::{Patch, PatchId};
+use radicle::patch::cache::Patches as _;
 use radicle::prelude::*;
 use radicle::profile::Profile;
 use radicle::storage::git::Repository;
@@ -15,22 +16,23 @@ use crate::terminal::patch as common;
 
 /// List patches.
 pub fn run(
-    filter: fn(&patch::State) -> bool,
+    filter: Option<&patch::Status>,
     authors: BTreeSet<Did>,
     repository: &Repository,
     profile: &Profile,
 ) -> anyhow::Result<()> {
-    let patches = Patches::open(repository)?;
+    let patches = profile.patches(repository)?;
 
     let mut all = Vec::new();
-    for patch in patches.all()? {
+    let iter = match filter {
+        Some(status) => patches.list_by_status(status)?,
+        None => patches.list()?,
+    };
+    for patch in iter {
         let Ok((id, patch)) = patch else {
             // Skip patches that failed to load.
             continue;
         };
-        if !filter(patch.state()) {
-            continue;
-        }
         if !authors.is_empty() {
             if !authors.contains(patch.author().id()) {
                 continue;
diff --git a/radicle-cli/src/commands/patch/ready.rs b/radicle-cli/src/commands/patch/ready.rs
index a35fca3f..4ab878ba 100644
--- a/radicle-cli/src/commands/patch/ready.rs
+++ b/radicle-cli/src/commands/patch/ready.rs
@@ -1,6 +1,5 @@
 use super::*;
 
-use radicle::cob::patch;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
 
@@ -11,7 +10,7 @@ pub fn run(
     repository: &Repository,
 ) -> anyhow::Result<()> {
     let signer = term::signer(profile)?;
-    let mut patches = patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(mut patch) = patches.get_mut(patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/redact.rs b/radicle-cli/src/commands/patch/redact.rs
index f493eb6e..3e26bb94 100644
--- a/radicle-cli/src/commands/patch/redact.rs
+++ b/radicle-cli/src/commands/patch/redact.rs
@@ -13,10 +13,14 @@ pub fn run(
     repository: &Repository,
 ) -> anyhow::Result<()> {
     let signer = &term::signer(profile)?;
-    let mut patches = patch::Patches::open(repository)?;
+    let mut patches = profile.patches_mut(repository)?;
 
     let revision_id = revision_id.resolve::<Oid>(&repository.backend)?;
-    let (patch_id, _, revision_id, _) = patches
+    let patch::ByRevision {
+        id: patch_id,
+        revision_id,
+        ..
+    } = patches
         .find_by_revision(&patch::RevisionId::from(revision_id))?
         .ok_or_else(|| anyhow!("Patch revision `{revision_id}` not found"))?;
     let Ok(mut patch) = patches.get_mut(&patch_id) else {
diff --git a/radicle-cli/src/commands/patch/review.rs b/radicle-cli/src/commands/patch/review.rs
index 00a201ea..d9e2e003 100644
--- a/radicle-cli/src/commands/patch/review.rs
+++ b/radicle-cli/src/commands/patch/review.rs
@@ -3,7 +3,7 @@ mod builder;
 
 use anyhow::{anyhow, Context};
 
-use radicle::cob::patch::{PatchId, Patches, RevisionId, Verdict};
+use radicle::cob::patch::{PatchId, RevisionId, Verdict};
 use radicle::git;
 use radicle::prelude::*;
 use radicle::storage::git::Repository;
@@ -61,8 +61,7 @@ pub fn run(
         "couldn't load repository {} from local state",
         repository.id
     ))?;
-    let mut patches = Patches::open(repository)?;
-
+    let mut patches = profile.patches_mut(repository)?;
     let mut patch = patches
         .get_mut(&patch_id)
         .context(format!("couldn't find patch {patch_id} locally"))?;
diff --git a/radicle-cli/src/commands/patch/show.rs b/radicle-cli/src/commands/patch/show.rs
index 6be728e4..c187c9e1 100644
--- a/radicle-cli/src/commands/patch/show.rs
+++ b/radicle-cli/src/commands/patch/show.rs
@@ -33,7 +33,7 @@ pub fn run(
     // TODO: Should be optional.
     workdir: &git::raw::Repository,
 ) -> anyhow::Result<()> {
-    let patches = patch::Patches::open(stored)?;
+    let patches = profile.patches(stored)?;
     let Some(patch) = patches.get(patch_id)? else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
diff --git a/radicle-cli/src/commands/patch/update.rs b/radicle-cli/src/commands/patch/update.rs
index 62537705..44765366 100644
--- a/radicle-cli/src/commands/patch/update.rs
+++ b/radicle-cli/src/commands/patch/update.rs
@@ -12,14 +12,14 @@ pub fn run(
     base_id: Option<git::raw::Oid>,
     message: term::patch::Message,
     profile: &Profile,
-    storage: &Repository,
+    repository: &Repository,
     workdir: &git::raw::Repository,
 ) -> anyhow::Result<()> {
     // `HEAD`; This is what we are proposing as a patch.
     let head_branch = try_branch(workdir.head()?)?;
 
-    let (_, target_oid) = get_merge_target(storage, &head_branch)?;
-    let mut patches = patch::Patches::open(storage)?;
+    let (_, target_oid) = get_merge_target(repository, &head_branch)?;
+    let mut patches = profile.patches_mut(repository)?;
     let Ok(mut patch) = patches.get_mut(&patch_id) else {
         anyhow::bail!("Patch `{patch_id}` not found");
     };
@@ -27,7 +27,7 @@ pub fn run(
     let head_oid = branch_oid(&head_branch)?;
     let base_oid = match base_id {
         Some(oid) => oid,
-        None => storage.backend.merge_base(*target_oid, *head_oid)?,
+        None => repository.backend.merge_base(*target_oid, *head_oid)?,
     };
 
     // N.b. we don't update if both the head and base are the same as
diff --git a/radicle-cli/src/commands/stats.rs b/radicle-cli/src/commands/stats.rs
index d99d22a5..b93b55be 100644
--- a/radicle-cli/src/commands/stats.rs
+++ b/radicle-cli/src/commands/stats.rs
@@ -3,11 +3,11 @@ use std::path::Path;
 
 use localtime::LocalDuration;
 use localtime::LocalTime;
-use radicle::cob::issue;
-use radicle::cob::patch;
 use radicle::git;
+use radicle::issue::cache::Issues as _;
 use radicle::node::address;
 use radicle::node::routing;
+use radicle::patch::cache::Patches as _;
 use radicle::storage::{ReadRepository, ReadStorage, WriteRepository};
 use radicle_term::Element;
 use serde::Serialize;
@@ -90,8 +90,8 @@ pub fn run(_options: Options, ctx: impl term::Context) -> anyhow::Result<()> {
 
     for repo in storage.repositories()? {
         let repo = storage.repository(repo.rid)?;
-        let issues = issue::Issues::open(&repo)?.counts()?;
-        let patches = patch::Patches::open(&repo)?.counts()?;
+        let issues = profile.issues(&repo)?.counts()?;
+        let patches = profile.patches(&repo)?.counts()?;
 
         stats.local.issues += issues.total();
         stats.local.patches += patches.total();
diff --git a/radicle-cli/tests/commands.rs b/radicle-cli/tests/commands.rs
index 68afd8f0..c33e7caf 100644
--- a/radicle-cli/tests/commands.rs
+++ b/radicle-cli/tests/commands.rs
@@ -1456,6 +1456,7 @@ fn test_cob_replication() {
 
     let bob_repo = bob.storage.repository(rid).unwrap();
     let mut bob_issues = radicle::cob::issue::Issues::open(&bob_repo).unwrap();
+    let mut bob_cache = radicle::cob::cache::InMemory::default();
     let issue = bob_issues
         .create(
             "Something's fishy",
@@ -1463,6 +1464,7 @@ fn test_cob_replication() {
             &[],
             &[],
             [],
+            &mut bob_cache,
             &bob.signer,
         )
         .unwrap();
@@ -1505,7 +1507,7 @@ fn test_cob_deletion() {
     bob.routes_to(&[(rid, alice.id)]);
 
     let alice_repo = alice.storage.repository(rid).unwrap();
-    let mut alice_issues = radicle::cob::issue::Issues::open(&alice_repo).unwrap();
+    let mut alice_issues = radicle::cob::issue::Cache::no_cache(&alice_repo).unwrap();
     let issue = alice_issues
         .create(
             "Something's fishy",
@@ -1526,7 +1528,7 @@ fn test_cob_deletion() {
     let bob_issues = radicle::cob::issue::Issues::open(&bob_repo).unwrap();
     assert!(bob_issues.get(issue_id).unwrap().is_some());
 
-    let alice_issues = radicle::cob::issue::Issues::open(&alice_repo).unwrap();
+    let mut alice_issues = radicle::cob::issue::Cache::no_cache(&alice_repo).unwrap();
     alice_issues.remove(issue_id, &alice.signer).unwrap();
 
     log::debug!(target: "test", "Removing issue..");
diff --git a/radicle-httpd/src/api.rs b/radicle-httpd/src/api.rs
index 75fb6218..81c00fcb 100644
--- a/radicle-httpd/src/api.rs
+++ b/radicle-httpd/src/api.rs
@@ -9,6 +9,8 @@ use axum::http::Method;
 use axum::response::{IntoResponse, Json};
 use axum::routing::get;
 use axum::Router;
+use radicle::issue::cache::Issues as _;
+use radicle::patch::cache::Patches as _;
 use serde::{Deserialize, Serialize};
 use serde_json::json;
 use tokio::sync::RwLock;
@@ -60,8 +62,8 @@ impl Context {
 
         let payload = doc.project()?;
         let delegates = doc.delegates;
-        let issues = issue::Issues::open(&repo)?.counts()?;
-        let patches = patch::Patches::open(&repo)?.counts()?;
+        let issues = self.profile.issues(&repo)?.counts()?;
+        let patches = self.profile.patches(&repo)?.counts()?;
         let db = &self.profile.database()?;
         let seeding = db.count(&id).unwrap_or_default();
 
diff --git a/radicle-httpd/src/api/error.rs b/radicle-httpd/src/api/error.rs
index 90c7b4cd..a9885f04 100644
--- a/radicle-httpd/src/api/error.rs
+++ b/radicle-httpd/src/api/error.rs
@@ -30,6 +30,14 @@ pub enum Error {
     #[error(transparent)]
     Storage(#[from] radicle::storage::Error),
 
+    /// Cob cache error.
+    #[error(transparent)]
+    CobCache(#[from] radicle::cob::cache::Error),
+
+    /// Cob issue cache error.
+    #[error(transparent)]
+    CacheIssue(#[from] radicle::cob::issue::cache::Error),
+
     /// Cob issue error.
     #[error(transparent)]
     CobIssue(#[from] radicle::cob::issue::Error),
@@ -38,6 +46,10 @@ pub enum Error {
     #[error(transparent)]
     CobPatch(#[from] radicle::cob::patch::Error),
 
+    /// Cob patch cache error.
+    #[error(transparent)]
+    CachePatch(#[from] radicle::cob::patch::cache::Error),
+
     /// Cob store error.
     #[error(transparent)]
     CobStore(#[from] radicle::cob::store::Error),
@@ -123,6 +135,7 @@ impl IntoResponse for Error {
             Error::BadRequest(msg) => (StatusCode::BAD_REQUEST, Some(msg)),
             other => {
                 tracing::error!("Error: {message}");
+                tracing::debug!("Error Debug: {:?}", other);
 
                 if cfg!(debug_assertions) {
                     (StatusCode::INTERNAL_SERVER_ERROR, Some(other.to_string()))
diff --git a/radicle-httpd/src/api/v1/delegates.rs b/radicle-httpd/src/api/v1/delegates.rs
index d7924df3..96d536f4 100644
--- a/radicle-httpd/src/api/v1/delegates.rs
+++ b/radicle-httpd/src/api/v1/delegates.rs
@@ -5,10 +5,10 @@ use axum::response::IntoResponse;
 use axum::routing::get;
 use axum::{Json, Router};
 
-use radicle::cob::issue::Issues;
-use radicle::cob::patch::Patches;
 use radicle::identity::{Did, Visibility};
+use radicle::issue::cache::Issues as _;
 use radicle::node::routing::Store;
+use radicle::patch::cache::Patches as _;
 use radicle::storage::{ReadRepository, ReadStorage};
 
 use crate::api::error::Error;
@@ -44,7 +44,6 @@ async fn delegates_projects_handler(
     let storage = &ctx.profile.storage;
     let db = &ctx.profile.database()?;
     let pinned = &ctx.profile.config.web.pinned;
-
     let mut projects = match show {
         ProjectQuery::All => storage
             .repositories()?
@@ -73,13 +72,13 @@ async fn delegates_projects_handler(
             let Ok(payload) = id.doc.project() else {
                 return None;
             };
-            let Ok(issues) = Issues::open(&repo) else {
+            let Ok(issues) = ctx.profile.issues(&repo) else {
                 return None;
             };
             let Ok(issues) = issues.counts() else {
                 return None;
             };
-            let Ok(patches) = Patches::open(&repo) else {
+            let Ok(patches) = ctx.profile.patches(&repo) else {
                 return None;
             };
             let Ok(patches) = patches.counts() else {
diff --git a/radicle-httpd/src/api/v1/projects.rs b/radicle-httpd/src/api/v1/projects.rs
index c6fdc947..160412a5 100644
--- a/radicle-httpd/src/api/v1/projects.rs
+++ b/radicle-httpd/src/api/v1/projects.rs
@@ -14,7 +14,10 @@ use serde::{Deserialize, Serialize};
 use serde_json::json;
 use tower_http::set_header::SetResponseHeaderLayer;
 
-use radicle::cob::{issue, patch, resolve_embed, Embed, Label, Uri};
+use radicle::cob::{
+    issue, issue::cache::Issues as _, patch, patch::cache::Patches as _, resolve_embed, Embed,
+    Label, Uri,
+};
 use radicle::identity::{Did, RepoId, Visibility};
 use radicle::node::routing::Store;
 use radicle::node::{AliasStore, Node, NodeId};
@@ -126,13 +129,13 @@ async fn project_root_handler(
             let Ok(payload) = info.doc.project() else {
                 return None;
             };
-            let Ok(issues) = issue::Issues::open(&repo) else {
+            let Ok(issues) = ctx.profile.issues(&repo) else {
                 return None;
             };
             let Ok(issues) = issues.counts() else {
                 return None;
             };
-            let Ok(patches) = patch::Patches::open(&repo) else {
+            let Ok(patches) = ctx.profile.patches(&repo) else {
                 return None;
             };
             let Ok(patches) = patches.counts() else {
@@ -587,9 +590,9 @@ async fn issues_handler(
     let state = state.unwrap_or_default();
     let storage = &ctx.profile.storage;
     let repo = storage.repository(project)?;
-    let issues = issue::Issues::open(&repo)?;
+    let issues = ctx.profile.issues(&repo)?;
     let mut issues: Vec<_> = issues
-        .all()?
+        .list()?
         .filter_map(|r| {
             let (id, issue) = r.ok()?;
             (state.matches(issue.state())).then_some((id, issue))
@@ -639,7 +642,7 @@ async fn issue_create_handler(
         .filter_map(|embed| resolve_embed(&repo, embed))
         .collect();
 
-    let mut issues = issue::Issues::open(&repo)?;
+    let mut issues = ctx.profile.issues_mut(&repo)?;
     let issue = issues
         .create(
             issue.title,
@@ -672,7 +675,7 @@ async fn issue_update_handler(
     let storage = &ctx.profile.storage;
     let signer = ctx.profile.signer()?;
     let repo = storage.repository(project)?;
-    let mut issues = issue::Issues::open(&repo)?;
+    let mut issues = ctx.profile.issues_mut(&repo)?;
     let mut issue = issues.get_mut(&issue_id.into())?;
 
     let id = match action {
@@ -723,7 +726,9 @@ async fn issue_handler(
 ) -> impl IntoResponse {
     let storage = &ctx.profile.storage;
     let repo = storage.repository(project)?;
-    let issue = issue::Issues::open(&repo)?
+    let issue = ctx
+        .profile
+        .issues(&repo)?
         .get(&issue_id.into())?
         .ok_or(Error::NotFound)?;
     let aliases = ctx.profile.aliases();
@@ -756,7 +761,7 @@ async fn patch_create_handler(
         .signer()
         .map_err(|_| Error::Auth("Unauthorized"))?;
     let repo = storage.repository(project)?;
-    let mut patches = patch::Patches::open(&repo)?;
+    let mut patches = ctx.profile.patches_mut(&repo)?;
     let base_oid = repo.raw().merge_base(*patch.target, *patch.oid)?;
 
     let patch = patches
@@ -795,7 +800,7 @@ async fn patch_update_handler(
         .signer()
         .map_err(|_| Error::Auth("Unauthorized"))?;
     let repo = storage.repository(project)?;
-    let mut patches = patch::Patches::open(&repo)?;
+    let mut patches = ctx.profile.patches_mut(&repo)?;
     let mut patch = patches.get_mut(&patch_id.into())?;
     let id = match action {
         patch::Action::Edit { title, target } => patch.edit(title, target, &signer)?,
@@ -940,9 +945,9 @@ async fn patches_handler(
     let state = state.unwrap_or_default();
     let storage = &ctx.profile.storage;
     let repo = storage.repository(project)?;
-    let patches = patch::Patches::open(&repo)?;
+    let patches = ctx.profile.patches(&repo)?;
     let mut patches = patches
-        .all()?
+        .list()?
         .filter_map(|r| {
             let (id, patch) = r.ok()?;
             (state.matches(patch.state())).then_some((id, patch))
@@ -968,9 +973,8 @@ async fn patch_handler(
 ) -> impl IntoResponse {
     let storage = &ctx.profile.storage;
     let repo = storage.repository(project)?;
-    let patch = patch::Patches::open(&repo)?
-        .get(&patch_id.into())?
-        .ok_or(Error::NotFound)?;
+    let patches = ctx.profile.patches(&repo)?;
+    let patch = patches.get(&patch_id.into())?.ok_or(Error::NotFound)?;
     let aliases = ctx.profile.aliases();
 
     Ok::<_, Error>(Json(api::json::patch(
diff --git a/radicle-httpd/src/test.rs b/radicle-httpd/src/test.rs
index cd8453b1..b420220d 100644
--- a/radicle-httpd/src/test.rs
+++ b/radicle-httpd/src/test.rs
@@ -11,18 +11,16 @@ use serde_json::Value;
 use time::OffsetDateTime;
 use tower::ServiceExt;
 
-use radicle::cob::issue::Issues;
-use radicle::cob::patch::{MergeTarget, Patches};
+use radicle::cob::patch::MergeTarget;
 use radicle::crypto::ssh::keystore::MemorySigner;
 use radicle::crypto::ssh::Keystore;
 use radicle::crypto::{KeyPair, Seed, Signer};
 use radicle::git::{raw as git2, RefString};
 use radicle::identity::Visibility;
-use radicle::node;
-use radicle::profile;
 use radicle::profile::Home;
 use radicle::storage::ReadStorage;
 use radicle::Storage;
+use radicle::{node, profile};
 use radicle_crypto::test::signer::MockSigner;
 
 use crate::api::{auth, Context};
@@ -231,7 +229,7 @@ fn seed_with_signer<G: Signer>(dir: &Path, profile: radicle::Profile, signer: &G
 
     let storage = &profile.storage;
     let repo = storage.repository(rid).unwrap();
-    let mut issues = Issues::open(&repo).unwrap();
+    let mut issues = profile.issues_mut(&repo).unwrap();
     let issue = issues
         .create(
             "Issue #1".to_string(),
@@ -245,7 +243,7 @@ fn seed_with_signer<G: Signer>(dir: &Path, profile: radicle::Profile, signer: &G
     tracing::debug!(target: "test", "Contributor issue: {}", issue.id());
 
     // eq. rad patch open
-    let mut patches = Patches::open(&repo).unwrap();
+    let mut patches = profile.patches_mut(&repo).unwrap();
     let oid = radicle::git::Oid::from_str(HEAD).unwrap();
     let base = radicle::git::Oid::from_str(PARENT).unwrap();
     let patch = patches
diff --git a/radicle-node/src/runtime.rs b/radicle-node/src/runtime.rs
index 3c882339..2a43f02c 100644
--- a/radicle-node/src/runtime.rs
+++ b/radicle-node/src/runtime.rs
@@ -14,7 +14,6 @@ use reactor::poller::popol;
 use reactor::Reactor;
 use thiserror::Error;
 
-use radicle::git;
 use radicle::node;
 use radicle::node::address;
 use radicle::node::address::Store as _;
@@ -22,6 +21,7 @@ use radicle::node::notifications;
 use radicle::node::Handle as _;
 use radicle::profile::Home;
 use radicle::Storage;
+use radicle::{cob, git};
 
 use crate::control;
 use crate::crypto::Signer;
@@ -42,6 +42,9 @@ pub enum Error {
     /// A routing database error.
     #[error("routing database error: {0}")]
     Routing(#[from] routing::Error),
+    /// A cobs cache database error.
+    #[error("cobs cache database error: {0}")]
+    CobsCache(#[from] cob::cache::Error),
     /// A node database error.
     #[error("node database error: {0}")]
     Database(#[from] node::db::Error),
@@ -156,6 +159,7 @@ impl Runtime {
         let policies = home.policies_mut()?;
         let policies = policy::Config::new(policy, scope, policies);
         let notifications = home.notifications_mut()?;
+        let cobs_cache = cob::cache::Store::open(home.cobs().join(cob::cache::COBS_DB_FILE))?;
 
         log::info!(target: "node", "Default seeding policy set to '{}'", &policy);
         log::info!(target: "node", "Initializing service ({:?})..", network);
@@ -257,6 +261,7 @@ impl Runtime {
             nid,
             handle.clone(),
             notifications,
+            cobs_cache,
             worker::Config {
                 capacity: 8,
                 timeout: time::Duration::from_secs(9),
diff --git a/radicle-node/src/test/environment.rs b/radicle-node/src/test/environment.rs
index 90844568..d89809f9 100644
--- a/radicle-node/src/test/environment.rs
+++ b/radicle-node/src/test/environment.rs
@@ -9,6 +9,7 @@ use std::{
 
 use crossbeam_channel as chan;
 
+use radicle::cob::cache::COBS_DB_FILE;
 use radicle::cob::issue;
 use radicle::crypto::ssh::{keystore::MemorySigner, Keystore};
 use radicle::crypto::test::signer::MockSigner;
@@ -110,6 +111,7 @@ impl Environment {
         let keystore = Keystore::new(&home.keys());
         let keypair = KeyPair::from_seed(Seed::from([!(self.users as u8); 32]));
         let policies_db = home.node().join(POLICIES_DB_FILE);
+        let cobs_db = home.cobs().join(COBS_DB_FILE);
 
         config.write(&home.config()).unwrap();
 
@@ -124,6 +126,7 @@ impl Environment {
 
         policy::Store::open(policies_db).unwrap();
         home.database_mut().unwrap(); // Just create the database.
+        cob::cache::Store::open(cobs_db).unwrap();
 
         transport::local::register(storage.clone());
         keystore.store(keypair.clone(), "radicle", None).unwrap();
@@ -380,7 +383,7 @@ impl<G: Signer + cyphernet::Ecdh> NodeHandle<G> {
     /// Create an [`issue::Issue`] in the `NodeHandle`'s storage.
     pub fn issue(&self, rid: RepoId, title: &str, desc: &str) -> cob::ObjectId {
         let repo = self.storage.repository(rid).unwrap();
-        let mut issues = issue::Issues::open(&repo).unwrap();
+        let mut issues = issue::Cache::no_cache(&repo).unwrap();
         *issues
             .create(title, desc, &[], &[], [], &self.signer)
             .unwrap()
diff --git a/radicle-node/src/tests.rs b/radicle-node/src/tests.rs
index b6e27233..e3a7988b 100644
--- a/radicle-node/src/tests.rs
+++ b/radicle-node/src/tests.rs
@@ -880,7 +880,7 @@ fn test_refs_announcement_offline() {
     // Create an issue without telling the node.
     let repo = alice.storage().repository(*rid).unwrap();
     let old_refs = RefsAt::new(&repo, alice.id).unwrap();
-    let mut issues = radicle::issue::Issues::open(&repo).unwrap();
+    let mut issues = radicle::issue::Cache::no_cache(&repo).unwrap();
     issues
         .create("Issue while offline!", "", &[], &[], [], alice.signer())
         .unwrap();
diff --git a/radicle-node/src/worker.rs b/radicle-node/src/worker.rs
index 60940400..41dbc7a4 100644
--- a/radicle-node/src/worker.rs
+++ b/radicle-node/src/worker.rs
@@ -15,7 +15,7 @@ use radicle::node::notifications;
 use radicle::prelude::NodeId;
 use radicle::storage::refs::RefsAt;
 use radicle::storage::{ReadRepository, ReadStorage};
-use radicle::{crypto, Storage};
+use radicle::{cob, crypto, Storage};
 use radicle_fetch::FetchLimit;
 
 use crate::runtime::{thread, Handle};
@@ -179,6 +179,7 @@ struct Worker {
     handle: Handle,
     policies: policy::Config<policy::store::Read>,
     notifications: notifications::StoreWriter,
+    cache: cob::cache::StoreWriter,
 }
 
 impl Worker {
@@ -199,7 +200,13 @@ impl Worker {
         } = task;
         let remote = fetch.remote();
         let channels = channels::ChannelsFlush::new(self.handle.clone(), channels, remote, stream);
-        let result = self._process(fetch, stream, channels, self.notifications.clone());
+        let result = self._process(
+            fetch,
+            stream,
+            channels,
+            self.notifications.clone(),
+            self.cache.clone(),
+        );
 
         log::trace!(target: "worker", "Sending response back to service..");
 
@@ -222,6 +229,7 @@ impl Worker {
         stream: StreamId,
         mut channels: channels::ChannelsFlush,
         notifs: notifications::StoreWriter,
+        cache: cob::cache::StoreWriter,
     ) -> FetchResult {
         match fetch {
             FetchRequest::Initiator {
@@ -232,7 +240,7 @@ impl Worker {
                 timeout: _timeout,
             } => {
                 log::debug!(target: "worker", "Worker processing outgoing fetch for {rid}");
-                let result = self.fetch(rid, remote, refs_at, channels, notifs);
+                let result = self.fetch(rid, remote, refs_at, channels, notifs, cache);
                 FetchResult::Initiator { rid, result }
             }
             FetchRequest::Responder { remote } => {
@@ -282,6 +290,7 @@ impl Worker {
         refs_at: Option<Vec<RefsAt>>,
         channels: channels::ChannelsFlush,
         notifs: notifications::StoreWriter,
+        mut cache: cob::cache::StoreWriter,
     ) -> Result<fetch::FetchResult, FetchError> {
         let FetchConfig {
             limit,
@@ -302,7 +311,7 @@ impl Worker {
             channels,
             notifs,
         )?;
-        let result = handle.fetch(rid, &self.storage, *limit, remote, refs_at)?;
+        let result = handle.fetch(rid, &self.storage, &mut cache, *limit, remote, refs_at)?;
 
         if let Err(e) = garbage::collect(&self.storage, rid, *expiry) {
             // N.b. ensure that `git gc` works in debug mode.
@@ -326,6 +335,7 @@ impl Pool {
         nid: NodeId,
         handle: Handle,
         notifications: notifications::StoreWriter,
+        cache: cob::cache::StoreWriter,
         config: Config,
     ) -> Result<Self, policy::Error> {
         let mut pool = Vec::with_capacity(config.capacity);
@@ -343,6 +353,7 @@ impl Pool {
                 fetch_config: config.fetch.clone(),
                 policies,
                 notifications: notifications.clone(),
+                cache: cache.clone(),
             };
             let thread = thread::spawn(&nid, format!("worker#{i}"), || worker.run());
 
diff --git a/radicle-node/src/worker/fetch.rs b/radicle-node/src/worker/fetch.rs
index 0dc290b6..08ad795e 100644
--- a/radicle-node/src/worker/fetch.rs
+++ b/radicle-node/src/worker/fetch.rs
@@ -8,8 +8,10 @@ use localtime::LocalTime;
 use radicle::crypto::PublicKey;
 use radicle::prelude::RepoId;
 use radicle::storage::refs::RefsAt;
-use radicle::storage::{ReadStorage as _, RefUpdate, RemoteRepository, WriteRepository as _};
-use radicle::{git, node, Storage};
+use radicle::storage::{
+    ReadRepository, ReadStorage as _, RefUpdate, RemoteRepository, WriteRepository as _,
+};
+use radicle::{cob, git, node, Storage};
 use radicle_fetch::{Allowed, BlockList, FetchLimit};
 
 use super::channels::ChannelsFlush;
@@ -62,6 +64,7 @@ impl Handle {
         self,
         rid: RepoId,
         storage: &Storage,
+        cache: &mut cob::cache::StoreWriter,
         limit: FetchLimit,
         remote: PublicKey,
         refs_at: Option<Vec<RefsAt>>,
@@ -117,6 +120,8 @@ impl Handle {
                     }
                 }
 
+                cache_cobs(&rid, &applied.updated, &repo, cache)?;
+
                 Ok(FetchResult {
                     updated: applied.updated,
                     namespaces: remotes.into_iter().collect(),
@@ -194,3 +199,89 @@ fn notify(
     }
     Ok(())
 }
+
+/// Write new `RefUpdate`s that are related a `Patch` or an `Issue`
+/// COB to the COB cache.
+fn cache_cobs<S, C>(
+    rid: &RepoId,
+    refs: &[RefUpdate],
+    storage: &S,
+    cache: &mut C,
+) -> Result<(), error::Cache>
+where
+    S: ReadRepository + cob::Store,
+    C: cob::cache::Update<cob::issue::Issue> + cob::cache::Update<cob::patch::Patch>,
+    C: cob::cache::Remove<cob::issue::Issue> + cob::cache::Remove<cob::patch::Patch>,
+{
+    let issues = cob::issue::Issues::open(storage)?;
+    let patches = cob::patch::Patches::open(storage)?;
+    for update in refs {
+        match update {
+            RefUpdate::Updated { name, .. } | RefUpdate::Created { name, .. } => {
+                match name.to_namespaced() {
+                    Some(name) => {
+                        let Some(identifier) = cob::TypedId::from_namespaced(&name)? else {
+                            continue;
+                        };
+                        if identifier.is_issue() {
+                            if let Some(issue) = issues.get(&identifier.id)? {
+                                cache
+                                    .update(rid, &identifier.id, &issue)
+                                    .map(|_| ())
+                                    .map_err(|e| error::Cache::Update {
+                                        id: identifier.id,
+                                        type_name: identifier.type_name,
+                                        err: e.into(),
+                                    })?;
+                            }
+                        } else if identifier.is_patch() {
+                            if let Some(patch) = patches.get(&identifier.id)? {
+                                cache
+                                    .update(rid, &identifier.id, &patch)
+                                    .map(|_| ())
+                                    .map_err(|e| error::Cache::Update {
+                                        id: identifier.id,
+                                        type_name: identifier.type_name,
+                                        err: e.into(),
+                                    })?;
+                            }
+                        }
+                    }
+                    None => continue,
+                }
+            }
+            RefUpdate::Deleted { name, .. } => match name.to_namespaced() {
+                Some(name) => {
+                    let Some(identifier) = cob::TypedId::from_namespaced(&name)? else {
+                        continue;
+                    };
+                    if identifier.is_issue() {
+                        cob::cache::Remove::<cob::issue::Issue>::remove(cache, &identifier.id)
+                            .map(|_| ())
+                            .map_err(|e| error::Cache::Remove {
+                                id: identifier.id,
+                                type_name: identifier.type_name,
+                                err: e.into(),
+                            })?;
+                    } else if identifier.is_patch() {
+                        cob::cache::Remove::<cob::patch::Patch>::remove(cache, &identifier.id)
+                            .map(|_| ())
+                            .map_err(
+                                |e: <C as cob::cache::Remove<cob::patch::Patch>>::RemoveError| {
+                                    error::Cache::Remove {
+                                        id: identifier.id,
+                                        type_name: identifier.type_name,
+                                        err: e.into(),
+                                    }
+                                },
+                            )?;
+                    }
+                }
+                None => continue,
+            },
+            RefUpdate::Skipped { .. } => { /* Do nothing */ }
+        }
+    }
+
+    Ok(())
+}
diff --git a/radicle-node/src/worker/fetch/error.rs b/radicle-node/src/worker/fetch/error.rs
index 80c97fb0..b5032559 100644
--- a/radicle-node/src/worker/fetch/error.rs
+++ b/radicle-node/src/worker/fetch/error.rs
@@ -2,7 +2,7 @@ use std::io;
 
 use thiserror::Error;
 
-use radicle::{git, identity, storage};
+use radicle::{cob, git, identity, storage};
 use radicle_fetch as fetch;
 
 #[derive(Debug, Error)]
@@ -19,6 +19,32 @@ pub enum Fetch {
     Repository(#[from] radicle::storage::RepositoryError),
     #[error("validation of storage repository failed")]
     Validation,
+    #[error(transparent)]
+    Cache(#[from] Cache),
+}
+
+#[derive(Debug, Error)]
+pub enum Cache {
+    #[error(transparent)]
+    Parse(#[from] cob::ParseIdentifierError),
+    #[error(transparent)]
+    Repository(#[from] storage::RepositoryError),
+    #[error("failed to remove {type_name} '{id}' from cache: {err}")]
+    Remove {
+        id: cob::ObjectId,
+        type_name: cob::TypeName,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
+    #[error(transparent)]
+    Store(#[from] cob::store::Error),
+    #[error("failed to update {type_name} '{id}' in cache: {err}")]
+    Update {
+        id: cob::ObjectId,
+        type_name: cob::TypeName,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
 }
 
 #[derive(Debug, Error)]
diff --git a/radicle-remote-helper/src/lib.rs b/radicle-remote-helper/src/lib.rs
index 522ed6cd..7ada7d44 100644
--- a/radicle-remote-helper/src/lib.rs
+++ b/radicle-remote-helper/src/lib.rs
@@ -185,7 +185,7 @@ pub fn run(profile: radicle::Profile) -> Result<(), Error> {
                 .map_err(Error::from);
             }
             ["list"] => {
-                list::for_fetch(&url, &stored)?;
+                list::for_fetch(&url, &profile, &stored)?;
             }
             ["list", "for-push"] => {
                 list::for_push(&profile, &stored)?;
diff --git a/radicle-remote-helper/src/list.rs b/radicle-remote-helper/src/list.rs
index 77ba7a5a..fd8c35d3 100644
--- a/radicle-remote-helper/src/list.rs
+++ b/radicle-remote-helper/src/list.rs
@@ -1,3 +1,5 @@
+use radicle::patch::cache::Patches as _;
+use radicle::profile;
 use thiserror::Error;
 
 use radicle::cob;
@@ -17,9 +19,15 @@ pub enum Error {
     /// Git error.
     #[error(transparent)]
     Git(#[from] radicle::git::ext::Error),
+    /// Profile error.
+    #[error(transparent)]
+    Profile(#[from] profile::Error),
     /// COB store error.
     #[error(transparent)]
     CobStore(#[from] cob::store::Error),
+    /// Patch COB cache error.
+    #[error(transparent)]
+    PatchCache(#[from] radicle::patch::cache::Error),
     /// General repository error.
     #[error(transparent)]
     Repository(#[from] radicle::storage::RepositoryError),
@@ -28,6 +36,7 @@ pub enum Error {
 /// List refs for fetching (`git fetch` and `git ls-remote`).
 pub fn for_fetch<R: ReadRepository + cob::Store + 'static>(
     url: &Url,
+    profile: &Profile,
     stored: &R,
 ) -> Result<(), Error> {
     if let Some(namespace) = url.namespace {
@@ -48,7 +57,7 @@ pub fn for_fetch<R: ReadRepository + cob::Store + 'static>(
         }
         // List the patch refs, but don't abort if there's an error, as this would break
         // all fetch behavior. Instead, just output an error to the user.
-        if let Err(e) = patch_refs(stored) {
+        if let Err(e) = patch_refs(profile, stored) {
             eprintln!("remote: error listing patch refs: {e}");
         }
     }
@@ -74,9 +83,12 @@ pub fn for_push<R: ReadRepository>(profile: &Profile, stored: &R) -> Result<(),
 }
 
 /// List canonical patch references. These are magic refs that can be used to pull patch updates.
-fn patch_refs<R: ReadRepository + cob::Store + 'static>(stored: &R) -> Result<(), Error> {
-    let patches = radicle::cob::patch::Patches::open(stored)?;
-    for patch in patches.all()? {
+fn patch_refs<R: ReadRepository + cob::Store + 'static>(
+    profile: &Profile,
+    stored: &R,
+) -> Result<(), Error> {
+    let patches = profile.patches(stored)?;
+    for patch in patches.list()? {
         let Ok((id, patch)) = patch else {
             // Ignore patches that fail to decode.
             continue;
diff --git a/radicle-remote-helper/src/push.rs b/radicle-remote-helper/src/push.rs
index 93b2e32f..c777610b 100644
--- a/radicle-remote-helper/src/push.rs
+++ b/radicle-remote-helper/src/push.rs
@@ -1,3 +1,4 @@
+#![allow(clippy::too_many_arguments)]
 use std::collections::{HashMap, HashSet};
 use std::io::IsTerminal;
 use std::ops::ControlFlow;
@@ -8,8 +9,10 @@ use std::{assert_eq, io};
 
 use thiserror::Error;
 
+use radicle::cob;
 use radicle::cob::object::ParseObjectId;
 use radicle::cob::patch;
+use radicle::cob::patch::cache::Patches as _;
 use radicle::crypto::Signer;
 use radicle::explorer::ExplorerResource;
 use radicle::identity::Did;
@@ -81,6 +84,9 @@ pub enum Error {
     /// Patch COB error.
     #[error(transparent)]
     Patch(#[from] radicle::cob::patch::Error),
+    /// Error from COB patch cache.
+    #[error(transparent)]
+    PatchCache(#[from] patch::cache::Error),
     /// Patch edit message error.
     #[error(transparent)]
     PatchEdit(#[from] cli::patch::Error),
@@ -209,7 +215,16 @@ pub fn run(
                 let working = git::raw::Repository::open(working)?;
 
                 if dst == &*rad::PATCHES_REFNAME {
-                    patch_open(src, &nid, &working, stored, &signer, profile, opts.clone())
+                    patch_open(
+                        src,
+                        &nid,
+                        &working,
+                        stored,
+                        profile.patches_mut(stored)?,
+                        &signer,
+                        profile,
+                        opts.clone(),
+                    )
                 } else {
                     let dst = git::Qualified::from_refstr(dst)
                         .ok_or_else(|| Error::InvalidQualifiedRef(dst.clone()))?;
@@ -225,6 +240,7 @@ pub fn run(
                             &nid,
                             &working,
                             stored,
+                            profile.patches_mut(stored)?,
                             &signer,
                             opts.clone(),
                         )
@@ -266,7 +282,16 @@ pub fn run(
                                 return Err(Error::HeadsDiverge(head.into(), *canonical_oid));
                             }
                         }
-                        push(src, &dst, *force, &nid, &working, stored, &signer)
+                        push(
+                            src,
+                            &dst,
+                            *force,
+                            &nid,
+                            &working,
+                            stored,
+                            profile.patches_mut(stored)?,
+                            &signer,
+                        )
                     }
                 }
             }
@@ -323,6 +348,10 @@ fn patch_open<G: Signer>(
     nid: &NodeId,
     working: &git::raw::Repository,
     stored: &storage::git::Repository,
+    mut patches: patch::Cache<
+        patch::Patches<'_, storage::git::Repository>,
+        cob::cache::StoreWriter,
+    >,
     signer: &G,
     profile: &Profile,
     opts: Options,
@@ -353,7 +382,6 @@ fn patch_open<G: Signer>(
     let (title, description) =
         cli::patch::get_create_message(opts.message, &stored.backend, &base, &head)?;
 
-    let mut patches = patch::Patches::open(stored)?;
     let patch = if opts.draft {
         patches.draft(
             &title,
@@ -442,6 +470,10 @@ fn patch_update<G: Signer>(
     nid: &NodeId,
     working: &git::raw::Repository,
     stored: &storage::git::Repository,
+    mut patches: patch::Cache<
+        patch::Patches<'_, storage::git::Repository>,
+        cob::cache::StoreWriter,
+    >,
     signer: &G,
     opts: Options,
 ) -> Result<Option<ExplorerResource>, Error> {
@@ -452,7 +484,6 @@ fn patch_update<G: Signer>(
 
     push_ref(src, &dst, force, working, stored.raw())?;
 
-    let mut patches = patch::Patches::open(stored)?;
     let Ok(mut patch) = patches.get_mut(&patch_id) else {
         return Err(Error::NotFound(patch_id));
     };
@@ -504,6 +535,7 @@ fn push<G: Signer>(
     nid: &NodeId,
     working: &git::raw::Repository,
     stored: &storage::git::Repository,
+    patches: patch::Cache<patch::Patches<'_, storage::git::Repository>, cob::cache::StoreWriter>,
     signer: &G,
 ) -> Result<Option<ExplorerResource>, Error> {
     let head = working.find_reference(src.as_str())?;
@@ -524,7 +556,7 @@ fn push<G: Signer>(
             let old = old.peel_to_commit()?.id();
             // Only delegates should publish the merge result to the COB.
             if stored.delegates()?.contains(&nid.into()) {
-                patch_merge_all(old.into(), head.into(), working, stored, signer)?;
+                patch_merge_all(old.into(), head.into(), working, patches, signer)?;
             }
         }
     }
@@ -536,7 +568,10 @@ fn patch_merge_all<G: Signer>(
     old: git::Oid,
     new: git::Oid,
     working: &git::raw::Repository,
-    stored: &storage::git::Repository,
+    mut patches: patch::Cache<
+        patch::Patches<'_, storage::git::Repository>,
+        cob::cache::StoreWriter,
+    >,
     signer: &G,
 ) -> Result<(), Error> {
     let mut revwalk = working.revwalk()?;
@@ -547,15 +582,13 @@ fn patch_merge_all<G: Signer>(
         .map(|r| r.map(git::Oid::from))
         .collect::<Result<Vec<git::Oid>, _>>()?;
 
-    let mut patches = patch::Patches::open(stored)?;
-    for patch in patches.all()? {
-        let Ok((id, patch)) = patch else {
-            // Skip patches that failed to load.
-            continue;
-        };
-        if !patch.is_open() && !patch.is_draft() {
-            continue;
-        }
+    let all = patches
+        .opened()?
+        .chain(patches.drafted()?)
+        // Skip patches that failed to load.
+        .filter_map(|patch| patch.ok())
+        .collect::<Vec<_>>();
+    for (id, patch) in all {
         // Later revisions are more likely to be merged, so we build the list backwards.
         let revisions = patch
             .revisions()
@@ -578,8 +611,8 @@ fn patch_merge_all<G: Signer>(
     Ok(())
 }
 
-fn patch_merge<G: Signer>(
-    mut patch: patch::PatchMut<storage::git::Repository>,
+fn patch_merge<C: cob::cache::Update<patch::Patch>, G: Signer>(
+    mut patch: patch::PatchMut<storage::git::Repository, C>,
     revision: patch::RevisionId,
     commit: git::Oid,
     working: &git::raw::Repository,
diff --git a/radicle-tools/src/rad-merge.rs b/radicle-tools/src/rad-merge.rs
index 49fcf660..5ed1e9ff 100644
--- a/radicle-tools/src/rad-merge.rs
+++ b/radicle-tools/src/rad-merge.rs
@@ -2,7 +2,7 @@ use std::collections::HashSet;
 use std::env;
 
 use anyhow::anyhow;
-use radicle::cob::patch::{PatchId, Patches};
+use radicle::cob::patch::PatchId;
 use radicle::git::Oid;
 use radicle::storage::ReadStorage;
 use radicle_cli::terminal as term;
@@ -15,7 +15,7 @@ fn main() -> anyhow::Result<()> {
     let profile = radicle::Profile::load()?;
     let (working, rid) = radicle::rad::cwd()?;
     let stored = profile.storage.repository(rid)?;
-    let mut patches = Patches::open(&stored)?;
+    let mut patches = profile.patches_mut(&stored)?;
     let mut patch = patches.get_mut(&pid)?;
 
     if patch.is_merged() {
diff --git a/radicle/src/cob.rs b/radicle/src/cob.rs
index ccecbe48..c41497b4 100644
--- a/radicle/src/cob.rs
+++ b/radicle/src/cob.rs
@@ -20,12 +20,16 @@ pub use radicle_cob::{
 };
 pub use radicle_cob::{create, get, git, list, remove, update};
 
+/// The exact identifier for a particular COB.
 #[derive(Clone, Debug, PartialEq, Eq, PartialOrd, Ord, Hash)]
 pub struct TypedId {
+    /// The identifier of the COB in the store.
     pub id: ObjectId,
+    /// The type identifier of the COB in the store.
     pub type_name: TypeName,
 }
 
+/// Errors that occur when parsing a Git refname into a [`TypedId`].
 #[derive(Debug, thiserror::Error)]
 pub enum ParseIdentifierError {
     #[error(transparent)]
@@ -35,20 +39,39 @@ pub enum ParseIdentifierError {
 }
 
 impl TypedId {
+    /// Returns `true` is the [`TypedId::type_name`] is for an
+    /// [`issue::Issue`].
     pub fn is_issue(&self) -> bool {
         self.type_name == *issue::TYPENAME
     }
 
+    /// Returns `true` is the [`TypedId::type_name`] is for an
+    /// [`patch::Patch`].
     pub fn is_patch(&self) -> bool {
         self.type_name == *patch::TYPENAME
     }
 
+    /// Parse a [`crate::git::Namespaced`] refname into a [`TypedId`].
+    ///
+    /// All namespaces are stripped before parsing the suffix for the
+    /// [`TypedId`] (see [`TypedId::from_qualified`]).
     pub fn from_namespaced(
         n: &crate::git::Namespaced,
     ) -> Result<Option<Self>, ParseIdentifierError> {
-        Self::from_qualified(&n.strip_namespace())
+        Self::from_qualified(&n.strip_namespace_recursive())
     }
 
+    /// Parse a [`crate::git::Qualified`] refname into a [`TypedId`].
+    ///
+    /// The refname is expected to be of the form:
+    ///     `refs/cobs/<type name>/<object id>`
+    ///
+    /// If the refname is not of that form then `None` will be returned.
+    ///
+    /// # Errors
+    ///
+    /// This will fail if the refname is of the correct form, but the
+    /// type name or object id fail to parse.
     pub fn from_qualified(q: &crate::git::Qualified) -> Result<Option<Self>, ParseIdentifierError> {
         match q.non_empty_iter() {
             ("refs", "cobs", type_name, mut id) => {
diff --git a/radicle/src/cob/cache.rs b/radicle/src/cob/cache.rs
index 86b13b55..407a6943 100644
--- a/radicle/src/cob/cache.rs
+++ b/radicle/src/cob/cache.rs
@@ -35,6 +35,11 @@ pub enum Error {
     NoRows,
 }
 
+/// Read and write to the store.
+pub type StoreWriter = Store<Write>;
+/// Write to the store.
+pub type StoreReader = Store<Read>;
+
 /// Read-only type witness.
 #[derive(Clone)]
 pub struct Read;
@@ -194,7 +199,10 @@ pub trait Remove<T> {
     type Out;
     type RemoveError: std::error::Error + Send + Sync + 'static;
 
-    fn remove(&mut self, rid: &RepoId, id: &ObjectId) -> Result<Self::Out, Self::RemoveError>;
+    /// Delete an object in the COB cache.
+    ///
+    /// This assumes that the `id` is unique across repositories.
+    fn remove(&mut self, id: &ObjectId) -> Result<Self::Out, Self::RemoveError>;
 }
 
 /// An in-memory cache for storing COB objects.
@@ -259,7 +267,48 @@ impl<T> Remove<T> for NoCache {
     type Out = ();
     type RemoveError = Infallible;
 
-    fn remove(&mut self, _rid: &RepoId, _id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
+    fn remove(&mut self, _id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
         Ok(())
     }
 }
+
+/// Track the progress of cache writes when transferring the
+/// repository COBs to their respective caches.
+///
+/// See [`crate::cob::issue::Cache::write_all`] and
+/// [`crate::cob::patch::Cache::write_all`].
+pub struct WriteAllProgress {
+    total: usize,
+    seen: usize,
+}
+
+impl WriteAllProgress {
+    /// Create a new progress tracker with the given `total` amount.
+    pub fn new(total: usize) -> Self {
+        Self { total, seen: 0 }
+    }
+
+    /// Increment the [`WriteAllProgress::seen`] progress.
+    pub fn inc(&mut self) {
+        self.seen += 1;
+    }
+
+    /// Return the `total` amount.
+    pub fn total(&self) -> usize {
+        self.total
+    }
+
+    /// Return the `seen` amount.
+    pub fn seen(&self) -> usize {
+        self.seen
+    }
+
+    /// Return the percentage of the progress made.
+    ///
+    /// # Panics
+    ///
+    /// If the `total` provided is `0`.
+    pub fn percentage(&self) -> f32 {
+        (self.seen as f32 / self.total as f32) * 100.0
+    }
+}
diff --git a/radicle/src/cob/issue.rs b/radicle/src/cob/issue.rs
index da8de57d..71d2dbb0 100644
--- a/radicle/src/cob/issue.rs
+++ b/radicle/src/cob/issue.rs
@@ -1,3 +1,5 @@
+pub mod cache;
+
 use std::collections::BTreeSet;
 use std::ops::Deref;
 use std::str::FromStr;
@@ -15,8 +17,10 @@ use crate::cob::thread::{Comment, CommentId, Thread};
 use crate::cob::{op, store, ActorId, Embed, EntryId, ObjectId, TypeName};
 use crate::crypto::Signer;
 use crate::identity::doc::{Doc, DocError};
-use crate::prelude::{Did, ReadRepository, Verified};
-use crate::storage::{RepositoryError, WriteRepository};
+use crate::prelude::{Did, ReadRepository, RepoId, Verified};
+use crate::storage::{HasRepoId, RepositoryError, WriteRepository};
+
+pub use cache::Cache;
 
 /// Issue operation.
 pub type Op = cob::Op<Action>;
@@ -56,6 +60,18 @@ pub enum Error {
     /// Error decoding an operation.
     #[error("op decoding failed: {0}")]
     Op(#[from] op::OpEncodingError),
+    #[error("failed to update issue {id} in cache: {err}")]
+    CacheUpdate {
+        id: IssueId,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
+    #[error("failed to remove issue {id} from cache : {err}")]
+    CacheRemove {
+        id: IssueId,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
 }
 
 /// Reason why an issue was closed.
@@ -410,8 +426,8 @@ impl Issue {
     }
 }
 
-impl<'a, 'g, R> From<IssueMut<'a, 'g, R>> for (IssueId, Issue) {
-    fn from(value: IssueMut<'a, 'g, R>) -> Self {
+impl<'a, 'g, R, C> From<IssueMut<'a, 'g, R, C>> for (IssueId, Issue) {
+    fn from(value: IssueMut<'a, 'g, R, C>) -> Self {
         (value.id, value.issue)
     }
 }
@@ -524,13 +540,14 @@ impl<R: ReadRepository> store::Transaction<Issue, R> {
     }
 }
 
-pub struct IssueMut<'a, 'g, R> {
+pub struct IssueMut<'a, 'g, R, C> {
     id: ObjectId,
     issue: Issue,
     store: &'g mut Issues<'a, R>,
+    cache: &'g mut C,
 }
 
-impl<'a, 'g, R> std::fmt::Debug for IssueMut<'a, 'g, R> {
+impl<'a, 'g, R, C> std::fmt::Debug for IssueMut<'a, 'g, R, C> {
     fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
         f.debug_struct("IssueMut")
             .field("id", &self.id)
@@ -539,9 +556,10 @@ impl<'a, 'g, R> std::fmt::Debug for IssueMut<'a, 'g, R> {
     }
 }
 
-impl<'a, 'g, R> IssueMut<'a, 'g, R>
+impl<'a, 'g, R, C> IssueMut<'a, 'g, R, C>
 where
     R: WriteRepository + cob::Store,
+    C: cob::cache::Update<Issue>,
 {
     /// Reload the issue data from storage.
     pub fn reload(&mut self) -> Result<(), store::Error> {
@@ -660,13 +678,19 @@ where
         operations(&mut tx)?;
 
         let (issue, commit) = tx.commit(message, self.id, &mut self.store.raw, signer)?;
+        self.cache
+            .update(&self.store.as_ref().id(), &self.id, &issue)
+            .map_err(|e| Error::CacheUpdate {
+                id: self.id,
+                err: e.into(),
+            })?;
         self.issue = issue;
 
         Ok(commit)
     }
 }
 
-impl<'a, 'g, R> Deref for IssueMut<'a, 'g, R> {
+impl<'a, 'g, R, C> Deref for IssueMut<'a, 'g, R, C> {
     type Target = Issue;
 
     fn deref(&self) -> &Self::Target {
@@ -686,6 +710,15 @@ impl<'a, R> Deref for Issues<'a, R> {
     }
 }
 
+impl<'a, R> HasRepoId for Issues<'a, R>
+where
+    R: ReadRepository,
+{
+    fn rid(&self) -> RepoId {
+        self.raw.as_ref().id()
+    }
+}
+
 /// Detailed information on issue states
 #[derive(Clone, Debug, PartialEq, Eq, Default, Serialize)]
 #[serde(rename_all = "camelCase")]
@@ -718,35 +751,21 @@ impl<'a, R> Issues<'a, R>
 where
     R: WriteRepository + cob::Store,
 {
-    /// Get an issue.
-    pub fn get(&self, id: &ObjectId) -> Result<Option<Issue>, store::Error> {
-        self.raw.get(id)
-    }
-
-    /// Get an issue mutably.
-    pub fn get_mut<'g>(&'g mut self, id: &ObjectId) -> Result<IssueMut<'a, 'g, R>, store::Error> {
-        let issue = self
-            .raw
-            .get(id)?
-            .ok_or_else(move || store::Error::NotFound(TYPENAME.clone(), *id))?;
-
-        Ok(IssueMut {
-            id: *id,
-            issue,
-            store: self,
-        })
-    }
-
     /// Create a new issue.
-    pub fn create<'g, G: Signer>(
+    pub fn create<'g, G, C>(
         &'g mut self,
         title: impl ToString,
         description: impl ToString,
         labels: &[Label],
         assignees: &[Did],
         embeds: impl IntoIterator<Item = Embed>,
+        cache: &'g mut C,
         signer: &G,
-    ) -> Result<IssueMut<'a, 'g, R>, Error> {
+    ) -> Result<IssueMut<'a, 'g, R, C>, Error>
+    where
+        G: Signer,
+        C: cob::cache::Update<Issue>,
+    {
         let (id, issue) = Transaction::initial("Create issue", &mut self.raw, signer, |tx| {
             tx.thread(description, embeds)?;
             tx.edit(title)?;
@@ -759,11 +778,52 @@ where
             }
             Ok(())
         })?;
+        cache
+            .update(&self.raw.as_ref().id(), &id, &issue)
+            .map_err(|e| Error::CacheUpdate { id, err: e.into() })?;
 
         Ok(IssueMut {
             id,
             issue,
             store: self,
+            cache,
+        })
+    }
+
+    /// Remove an issue.
+    pub fn remove<C, G: Signer>(&self, id: &ObjectId, signer: &G) -> Result<(), store::Error>
+    where
+        C: cob::cache::Remove<Issue>,
+    {
+        self.raw.remove(id, signer)
+    }
+}
+
+impl<'a, R> Issues<'a, R>
+where
+    R: ReadRepository + cob::Store,
+{
+    /// Get an issue.
+    pub fn get(&self, id: &ObjectId) -> Result<Option<Issue>, store::Error> {
+        self.raw.get(id)
+    }
+
+    /// Get an issue mutably.
+    pub fn get_mut<'g, C>(
+        &'g mut self,
+        id: &ObjectId,
+        cache: &'g mut C,
+    ) -> Result<IssueMut<'a, 'g, R, C>, store::Error> {
+        let issue = self
+            .raw
+            .get(id)?
+            .ok_or_else(move || store::Error::NotFound(TYPENAME.clone(), *id))?;
+
+        Ok(IssueMut {
+            id: *id,
+            issue,
+            store: self,
+            cache,
         })
     }
 
@@ -782,11 +842,6 @@ where
 
         Ok(state_groups)
     }
-
-    /// Remove an issue.
-    pub fn remove<G: Signer>(&self, id: &ObjectId, signer: &G) -> Result<(), store::Error> {
-        self.raw.remove(id, signer)
-    }
 }
 
 /// Issue action.
@@ -859,16 +914,16 @@ mod test {
     use super::*;
     use crate::cob::{ActorId, Reaction};
     use crate::git::Oid;
+    use crate::issue::cache::Issues as _;
     use crate::test;
     use crate::test::arbitrary;
 
     #[test]
     fn test_concurrency() {
         let t = test::setup::Network::default();
-        let mut issues_alice = Issues::open(&*t.alice.repo).unwrap();
-        let mut bob_issues = Issues::open(&*t.bob.repo).unwrap();
-        let mut eve_issues = Issues::open(&*t.eve.repo).unwrap();
-
+        let mut issues_alice = Cache::no_cache(&*t.alice.repo).unwrap();
+        let mut bob_issues = Cache::no_cache(&*t.bob.repo).unwrap();
+        let mut eve_issues = Cache::no_cache(&*t.eve.repo).unwrap();
         let mut issue_alice = issues_alice
             .create(
                 "Alice Issue",
@@ -954,7 +1009,7 @@ mod test {
     #[test]
     fn test_issue_create_and_assign() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
 
         let assignee = Did::from(arbitrary::gen::<ActorId>(1));
         let assignee_two = Did::from(arbitrary::gen::<ActorId>(1));
@@ -993,7 +1048,7 @@ mod test {
     #[test]
     fn test_issue_create_and_reassign() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
 
         let assignee = Did::from(arbitrary::gen::<ActorId>(1));
         let assignee_two = Did::from(arbitrary::gen::<ActorId>(1));
@@ -1002,7 +1057,7 @@ mod test {
                 "My first issue",
                 "Blah blah blah.",
                 &[],
-                &[assignee],
+                &[assignee, assignee_two],
                 [],
                 &node.signer,
             )
@@ -1026,7 +1081,7 @@ mod test {
     #[test]
     fn test_issue_create_and_get() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let created = issues
             .create(
                 "My first issue",
@@ -1052,7 +1107,7 @@ mod test {
     #[test]
     fn test_issue_create_and_change_state() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1092,7 +1147,7 @@ mod test {
     #[test]
     fn test_issue_create_and_unassign() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
 
         let assignee = Did::from(arbitrary::gen::<ActorId>(1));
         let assignee_two = Did::from(arbitrary::gen::<ActorId>(1));
@@ -1120,7 +1175,8 @@ mod test {
     #[test]
     fn test_issue_edit() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
+
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1144,7 +1200,7 @@ mod test {
     #[test]
     fn test_issue_edit_description() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1170,7 +1226,7 @@ mod test {
     #[test]
     fn test_issue_react() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1200,7 +1256,7 @@ mod test {
     #[test]
     fn test_issue_reply() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1255,7 +1311,7 @@ mod test {
     #[test]
     fn test_issue_label() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let bug_label = Label::new("bug").unwrap();
         let ux_label = Label::new("ux").unwrap();
         let wontfix_label = Label::new("wontfix").unwrap();
@@ -1293,7 +1349,7 @@ mod test {
     fn test_issue_comment() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
         let author = *node.signer.public_key();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1333,7 +1389,7 @@ mod test {
     #[test]
     fn test_issue_comment_redact() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1381,8 +1437,7 @@ mod test {
     #[test]
     fn test_issue_all() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
-
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         issues
             .create("First", "Blah", &[], &[], [], &node.signer)
             .unwrap();
@@ -1394,7 +1449,7 @@ mod test {
             .unwrap();
 
         let issues = issues
-            .all()
+            .list()
             .unwrap()
             .map(|r| r.map(|(_, i)| i))
             .collect::<Result<Vec<_>, _>>()
@@ -1410,7 +1465,7 @@ mod test {
     #[test]
     fn test_issue_multilines() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let created = issues
             .create(
                 "My first issue",
@@ -1436,7 +1491,7 @@ mod test {
     #[test]
     fn test_embeds() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let embed1 = Embed {
             name: String::from("example.html"),
             content: b"<html>Hello World!</html>".to_vec(),
@@ -1494,7 +1549,7 @@ mod test {
     #[test]
     fn test_embeds_edit() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let embed1 = Embed {
             name: String::from("example.html"),
             content: b"<html>Hello World!</html>".to_vec(),
@@ -1538,7 +1593,7 @@ mod test {
     #[test]
     fn test_invalid_actions() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1572,7 +1627,7 @@ mod test {
     #[test]
     fn test_invalid_tx() {
         let test::setup::NodeWithRepo { node, repo, .. } = test::setup::NodeWithRepo::default();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
@@ -1608,7 +1663,7 @@ mod test {
         let identity = repo.identity().unwrap().head();
         let missing = arbitrary::oid();
         let type_name = Issue::type_name().clone();
-        let mut issues = Issues::open(&*repo).unwrap();
+        let mut issues = Cache::no_cache(&*repo).unwrap();
         let mut issue = issues
             .create(
                 "My first issue",
diff --git a/radicle/src/cob/issue/cache.rs b/radicle/src/cob/issue/cache.rs
new file mode 100644
index 00000000..b5272dbc
--- /dev/null
+++ b/radicle/src/cob/issue/cache.rs
@@ -0,0 +1,685 @@
+use std::ops::ControlFlow;
+use std::str::FromStr;
+
+use sqlite as sql;
+use thiserror::Error;
+
+use crate::cob;
+use crate::cob::cache;
+use crate::cob::cache::{Remove, StoreReader, StoreWriter, Update};
+use crate::cob::store;
+use crate::cob::{Embed, Label, ObjectId, TypeName};
+use crate::crypto::Signer;
+use crate::prelude::{Did, RepoId};
+use crate::sql::transaction;
+use crate::storage::{HasRepoId, ReadRepository, RepositoryError, SignRepository, WriteRepository};
+
+use super::{Issue, IssueCounts, IssueId, IssueMut, State};
+
+/// A set of read-only methods for a [`Issue`] store.
+pub trait Issues {
+    type Error: std::error::Error + Send + Sync + 'static;
+
+    /// An iterator for returning a set of issues from the store.
+    type Iter<'a>: Iterator<Item = Result<(IssueId, Issue), Self::Error>> + 'a
+    where
+        Self: 'a;
+
+    /// Get the `Issue`, identified by `id`, returning `None` if it
+    /// was not found.
+    fn get(&self, id: &IssueId) -> Result<Option<Issue>, Self::Error>;
+
+    /// List all issues that are in the store.
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error>;
+
+    /// Get the [`IssueCounts`] of all the issues in the store.
+    fn counts(&self) -> Result<IssueCounts, Self::Error>;
+
+    /// Returns `true` if there are no issues in the store.
+    fn is_empty(&self) -> Result<bool, Self::Error> {
+        Ok(self.counts()?.total() == 0)
+    }
+}
+
+/// [`Issues`] store that can also [`Update`] and [`Remove`]
+/// [`Issue`] in/from the store.
+pub trait IssuesMut: Issues + Update<Issue> + Remove<Issue> {}
+
+impl<T> IssuesMut for T where T: Issues + Update<Issue> + Remove<Issue> {}
+
+/// An `Issue` store that relies on the `cache` for reads and as a
+/// write-through cache.
+///
+/// The `store` is used for the main storage when performing a
+/// write-through. It is also used for identifying which `RepoId` is
+/// being used for the `cache`.
+pub struct Cache<R, C> {
+    store: R,
+    cache: C,
+}
+
+impl<R, C> Cache<R, C> {
+    pub fn new(store: R, cache: C) -> Self {
+        Self { store, cache }
+    }
+
+    pub fn rid(&self) -> RepoId
+    where
+        R: HasRepoId,
+    {
+        self.store.rid()
+    }
+}
+
+impl<'a, R, C> Cache<super::Issues<'a, R>, C> {
+    /// Create a new [`Issue`] using the [`super::Issues`] as the
+    /// main storage, and writing the update to the `cache`.
+    pub fn create<'g, G>(
+        &'g mut self,
+        title: impl ToString,
+        description: impl ToString,
+        labels: &[Label],
+        assignees: &[Did],
+        embeds: impl IntoIterator<Item = Embed>,
+        signer: &G,
+    ) -> Result<IssueMut<'a, 'g, R, C>, super::Error>
+    where
+        R: ReadRepository + WriteRepository + cob::Store,
+        G: Signer,
+        C: Update<Issue>,
+    {
+        self.store.create(
+            title,
+            description,
+            labels,
+            assignees,
+            embeds,
+            &mut self.cache,
+            signer,
+        )
+    }
+
+    /// Remove the given `id` from the [`super::Issues`] storage, and
+    /// removing the entry from the `cache`.
+    pub fn remove<G>(&mut self, id: &IssueId, signer: &G) -> Result<(), super::Error>
+    where
+        G: Signer,
+        R: ReadRepository + SignRepository + cob::Store,
+        C: Remove<Issue>,
+    {
+        self.store.remove(id, signer)?;
+        self.cache
+            .remove(id)
+            .map_err(|e| super::Error::CacheRemove {
+                id: *id,
+                err: e.into(),
+            })?;
+        Ok(())
+    }
+
+    /// Read the given `id` from the [`super::Issues`] store and
+    /// writing it to the `cache`.
+    pub fn write(&mut self, id: &IssueId) -> Result<(), super::Error>
+    where
+        R: ReadRepository + cob::Store,
+        C: Update<Issue>,
+    {
+        let issue = self
+            .store
+            .get(id)?
+            .ok_or_else(|| store::Error::NotFound((*super::TYPENAME).clone(), *id))?;
+        self.update(&self.rid(), id, &issue)
+            .map_err(|e| super::Error::CacheUpdate {
+                id: *id,
+                err: e.into(),
+            })?;
+        Ok(())
+    }
+
+    /// Read all the issues from the [`super::Issues`] store and
+    /// writing them to `cache`.
+    ///
+    /// The `callback` is used for reporting success, failures, and
+    /// progress to the caller. The caller may also decide to continue
+    /// or break from the process.
+    pub fn write_all(
+        &mut self,
+        on_issue: impl Fn(
+            &Result<(IssueId, Issue), store::Error>,
+            &cache::WriteAllProgress,
+        ) -> ControlFlow<()>,
+    ) -> Result<(), super::Error>
+    where
+        R: ReadRepository + cob::Store,
+        C: Update<Issue>,
+    {
+        let issues = self.store.all()?;
+        let mut progress = cache::WriteAllProgress::new(issues.len());
+        for issue in self.store.all()? {
+            progress.inc();
+            match on_issue(&issue, &progress) {
+                ControlFlow::Continue(()) => match issue {
+                    Ok((id, issue)) => {
+                        self.update(&self.rid(), &id, &issue)
+                            .map_err(|e| super::Error::CacheUpdate { id, err: e.into() })?;
+                    }
+                    Err(_) => continue,
+                },
+                ControlFlow::Break(()) => break,
+            }
+        }
+        Ok(())
+    }
+}
+
+impl<'a, R> Cache<super::Issues<'a, R>, cache::NoCache>
+where
+    R: ReadRepository + cob::Store,
+{
+    /// Get a `Cache` that does no write-through modifications and
+    /// uses the [`super::Issues`] store for all reads and writes.
+    pub fn no_cache(repository: &'a R) -> Result<Self, RepositoryError> {
+        let store = super::Issues::open(repository)?;
+        Ok(Self {
+            store,
+            cache: cache::NoCache,
+        })
+    }
+
+    /// Get the [`IssueMut`], identified by `id`.
+    pub fn get_mut<'g>(
+        &'g mut self,
+        id: &ObjectId,
+    ) -> Result<IssueMut<'a, 'g, R, cache::NoCache>, super::Error> {
+        let issue = self
+            .store
+            .get(id)?
+            .ok_or_else(move || store::Error::NotFound(super::TYPENAME.clone(), *id))?;
+
+        Ok(IssueMut {
+            id: *id,
+            issue,
+            store: &mut self.store,
+            cache: &mut self.cache,
+        })
+    }
+}
+
+impl<R> Cache<R, StoreReader> {
+    pub fn reader(store: R, cache: StoreReader) -> Self {
+        Self { store, cache }
+    }
+}
+
+impl<R> Cache<R, StoreWriter> {
+    pub fn open(store: R, cache: StoreWriter) -> Self {
+        Self { store, cache }
+    }
+}
+
+impl<'a, R> Cache<super::Issues<'a, R>, StoreWriter>
+where
+    R: ReadRepository + cob::Store,
+{
+    /// Get the [`IssueMut`], identified by `id`, using the
+    /// `StoreWriter` for retrieving the `Issue`.
+    pub fn get_mut<'g>(
+        &'g mut self,
+        id: &ObjectId,
+    ) -> Result<IssueMut<'a, 'g, R, StoreWriter>, Error> {
+        let issue = Issues::get(self, id)?
+            .ok_or_else(move || Error::NotFound(super::TYPENAME.clone(), *id))?;
+
+        Ok(IssueMut {
+            id: *id,
+            issue,
+            store: &mut self.store,
+            cache: &mut self.cache,
+        })
+    }
+}
+
+impl<R, C> cache::Update<Issue> for Cache<R, C>
+where
+    C: cache::Update<Issue>,
+{
+    type Out = <C as cache::Update<Issue>>::Out;
+    type UpdateError = <C as cache::Update<Issue>>::UpdateError;
+
+    fn update(
+        &mut self,
+        rid: &RepoId,
+        id: &ObjectId,
+        object: &Issue,
+    ) -> Result<Self::Out, Self::UpdateError> {
+        self.cache.update(rid, id, object)
+    }
+}
+
+impl<R, C> cache::Remove<Issue> for Cache<R, C>
+where
+    C: cache::Remove<Issue>,
+{
+    type Out = <C as cache::Remove<Issue>>::Out;
+    type RemoveError = <C as cache::Remove<Issue>>::RemoveError;
+
+    fn remove(&mut self, id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
+        self.cache.remove(id)
+    }
+}
+
+#[derive(Debug, Error)]
+pub enum UpdateError {
+    #[error(transparent)]
+    Json(#[from] serde_json::Error),
+    #[error(transparent)]
+    Sql(#[from] sql::Error),
+}
+
+impl Update<Issue> for StoreWriter {
+    type Out = bool;
+    type UpdateError = UpdateError;
+
+    fn update(
+        &mut self,
+        rid: &RepoId,
+        id: &ObjectId,
+        object: &Issue,
+    ) -> Result<Self::Out, Self::UpdateError> {
+        transaction::<_, UpdateError>(&self.db, move |db| {
+            let mut stmt = db.prepare(
+                "INSERT INTO issues (id, repo, issue)
+                  VALUES (?1, ?2, ?3)
+                  ON CONFLICT DO UPDATE
+                  SET issue =  (?3)",
+            )?;
+
+            stmt.bind((1, sql::Value::String(id.to_string())))?;
+            stmt.bind((2, rid))?;
+            stmt.bind((3, sql::Value::String(serde_json::to_string(&object)?)))?;
+            stmt.next()?;
+
+            Ok(db.change_count() > 0)
+        })
+    }
+}
+
+impl Remove<Issue> for StoreWriter {
+    type Out = bool;
+    type RemoveError = sql::Error;
+
+    fn remove(&mut self, id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
+        transaction::<_, sql::Error>(&self.db, move |db| {
+            let mut stmt = db.prepare(
+                "DELETE FROM issues
+                  WHERE id = ?1",
+            )?;
+
+            stmt.bind((1, sql::Value::String(id.to_string())))?;
+            stmt.next()?;
+
+            Ok(db.change_count() > 0)
+        })
+    }
+}
+
+pub struct NoCacheIter<'a> {
+    inner: Box<dyn Iterator<Item = Result<(IssueId, Issue), super::Error>> + 'a>,
+}
+
+impl<'a> Iterator for NoCacheIter<'a> {
+    type Item = Result<(IssueId, Issue), super::Error>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.inner.next()
+    }
+}
+
+impl<'a, R> Issues for Cache<super::Issues<'a, R>, cache::NoCache>
+where
+    R: ReadRepository + cob::Store,
+{
+    type Error = super::Error;
+    type Iter<'b> = NoCacheIter<'b> where Self: 'b;
+
+    fn get(&self, id: &IssueId) -> Result<Option<Issue>, Self::Error> {
+        self.store.get(id).map_err(super::Error::from)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.store
+            .all()
+            .map(|inner| NoCacheIter {
+                inner: Box::new(inner.into_iter().map(|res| res.map_err(super::Error::from))),
+            })
+            .map_err(super::Error::from)
+    }
+
+    fn counts(&self) -> Result<IssueCounts, Self::Error> {
+        self.store.counts().map_err(super::Error::from)
+    }
+}
+
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("object `{1}` of type `{0}` was not found")]
+    NotFound(TypeName, ObjectId),
+    #[error(transparent)]
+    Object(#[from] cob::object::ParseObjectId),
+    #[error(transparent)]
+    Json(#[from] serde_json::Error),
+    #[error(transparent)]
+    Sql(#[from] sql::Error),
+}
+
+/// Iterator that returns a set of issues based on an SQL query.
+///
+/// The query is expected to return rows with columns identified by
+/// the `id` and `issue` names.
+pub struct IssuesIter<'a> {
+    inner: sql::CursorWithOwnership<'a>,
+}
+
+impl<'a> IssuesIter<'a> {
+    fn parse_row(row: sql::Row) -> Result<(IssueId, Issue), Error> {
+        let id = IssueId::from_str(row.read::<&str, _>("id"))?;
+        let issue = serde_json::from_str::<Issue>(row.read::<&str, _>("issue"))?;
+        Ok((id, issue))
+    }
+}
+
+impl<'a> Iterator for IssuesIter<'a> {
+    type Item = Result<(IssueId, Issue), Error>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let row = self.inner.next()?;
+        Some(row.map_err(Error::from).and_then(IssuesIter::parse_row))
+    }
+}
+
+impl<R> Issues for Cache<R, StoreWriter>
+where
+    R: HasRepoId,
+{
+    type Error = Error;
+    type Iter<'b> = IssuesIter<'b> where Self: 'b;
+
+    fn get(&self, id: &IssueId) -> Result<Option<Issue>, Self::Error> {
+        query::get(&self.cache.db, &self.rid(), id)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list(&self.cache.db, &self.rid())
+    }
+
+    fn counts(&self) -> Result<IssueCounts, Self::Error> {
+        query::counts(&self.cache.db, &self.rid())
+    }
+}
+
+impl<R> Issues for Cache<R, StoreReader>
+where
+    R: HasRepoId,
+{
+    type Error = Error;
+    type Iter<'b> = IssuesIter<'b> where Self: 'b;
+
+    fn get(&self, id: &IssueId) -> Result<Option<Issue>, Self::Error> {
+        query::get(&self.cache.db, &self.rid(), id)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list(&self.cache.db, &self.rid())
+    }
+
+    fn counts(&self) -> Result<IssueCounts, Self::Error> {
+        query::counts(&self.cache.db, &self.rid())
+    }
+}
+
+/// Helper SQL queries for [ `Issues`] trait implementations.
+mod query {
+    use sqlite as sql;
+
+    use super::*;
+
+    pub(super) fn get(
+        db: &sql::ConnectionThreadSafe,
+        rid: &RepoId,
+        id: &IssueId,
+    ) -> Result<Option<Issue>, Error> {
+        let id = sql::Value::String(id.to_string());
+        let mut stmt = db.prepare(
+            "SELECT issue
+             FROM issues
+             WHERE id = ?1 and repo = ?2",
+        )?;
+
+        stmt.bind((1, id))?;
+        stmt.bind((2, rid))?;
+
+        match stmt.into_iter().next().transpose()? {
+            None => Ok(None),
+            Some(row) => {
+                let issue = row.read::<&str, _>("issue");
+                let issue = serde_json::from_str(issue)?;
+                Ok(Some(issue))
+            }
+        }
+    }
+
+    pub(super) fn list<'a>(
+        db: &'a sql::ConnectionThreadSafe,
+        rid: &RepoId,
+    ) -> Result<IssuesIter<'a>, Error> {
+        let mut stmt = db.prepare(
+            "SELECT id, issue
+             FROM issues
+             WHERE repo = ?1
+            ",
+        )?;
+        stmt.bind((1, rid))?;
+        Ok(IssuesIter {
+            inner: stmt.into_iter(),
+        })
+    }
+
+    pub(super) fn counts(
+        db: &sql::ConnectionThreadSafe,
+        rid: &RepoId,
+    ) -> Result<IssueCounts, Error> {
+        let mut stmt = db.prepare(
+            "SELECT
+                 issue->'$.state' AS state,
+                 COUNT(*) AS count
+             FROM issues
+             WHERE repo = ?1
+             GROUP BY issue->'$.state.status'",
+        )?;
+        stmt.bind((1, rid))?;
+
+        stmt.into_iter()
+            .try_fold(IssueCounts::default(), |mut counts, row| {
+                let row = row?;
+                let count = row.read::<i64, _>("count") as usize;
+                let status = serde_json::from_str::<State>(row.read::<&str, _>("state"))?;
+                match status {
+                    State::Closed { .. } => counts.closed += count,
+                    State::Open => counts.open += count,
+                }
+                Ok(counts)
+            })
+    }
+}
+
+#[allow(clippy::unwrap_used)]
+#[cfg(test)]
+mod tests {
+    use std::collections::BTreeSet;
+    use std::str::FromStr;
+
+    use radicle_cob::ObjectId;
+
+    use crate::cob::cache::{Store, Update, Write};
+    use crate::cob::thread::Thread;
+    use crate::issue::{CloseReason, Issue, IssueCounts, IssueId, State};
+    use crate::test::arbitrary;
+    use crate::test::storage::MockRepository;
+
+    use super::{Cache, Issues};
+
+    fn memory(store: MockRepository) -> Cache<MockRepository, Store<Write>> {
+        let cache = Store::<Write>::memory().unwrap();
+        Cache { store, cache }
+    }
+
+    #[test]
+    fn test_is_empty() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        assert!(cache.is_empty().unwrap());
+
+        let issue = Issue::new(Thread::default());
+        let id = ObjectId::from_str("47799cbab2eca047b6520b9fce805da42b49ecab").unwrap();
+        cache.update(&cache.rid(), &id, &issue).unwrap();
+
+        let issue = Issue {
+            state: State::Closed {
+                reason: CloseReason::Solved,
+            },
+            ..Issue::new(Thread::default())
+        };
+        let id = ObjectId::from_str("ae981ded6ed2ed2cdba34c8603714782667f18a3").unwrap();
+        cache.update(&cache.rid(), &id, &issue).unwrap();
+
+        assert!(!cache.is_empty().unwrap())
+    }
+
+    #[test]
+    fn test_counts() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let n_open = arbitrary::gen::<u8>(0);
+        let n_closed = arbitrary::gen::<u8>(1);
+        let open_ids = (0..n_open)
+            .map(|_| IssueId::from(arbitrary::oid()))
+            .collect::<BTreeSet<IssueId>>();
+        let closed_ids = (0..n_closed)
+            .map(|_| IssueId::from(arbitrary::oid()))
+            .collect::<BTreeSet<IssueId>>();
+
+        for id in open_ids.iter() {
+            let issue = Issue::new(Thread::default());
+            cache
+                .update(&cache.rid(), &IssueId::from(*id), &issue)
+                .unwrap();
+        }
+
+        for id in closed_ids.iter() {
+            let issue = Issue {
+                state: State::Closed {
+                    reason: CloseReason::Solved,
+                },
+                ..Issue::new(Thread::default())
+            };
+            cache
+                .update(&cache.rid(), &IssueId::from(*id), &issue)
+                .unwrap();
+        }
+
+        assert_eq!(
+            cache.counts().unwrap(),
+            IssueCounts {
+                open: open_ids.len(),
+                closed: closed_ids.len()
+            }
+        );
+    }
+
+    #[test]
+    fn test_get() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| IssueId::from(arbitrary::oid()))
+            .collect::<BTreeSet<IssueId>>();
+        let missing = (0..arbitrary::gen::<u8>(2))
+            .filter_map(|_| {
+                let id = IssueId::from(arbitrary::oid());
+                (!ids.contains(&id)).then_some(id)
+            })
+            .collect::<BTreeSet<IssueId>>();
+        let mut issues = Vec::with_capacity(ids.len());
+
+        for id in ids.iter() {
+            let issue = Issue {
+                title: id.to_string(),
+                ..Issue::new(Thread::default())
+            };
+            cache
+                .update(&cache.rid(), &IssueId::from(*id), &issue)
+                .unwrap();
+            issues.push((*id, issue));
+        }
+
+        for (id, issue) in issues.into_iter() {
+            assert_eq!(Some(issue), cache.get(&id).unwrap());
+        }
+
+        for id in &missing {
+            assert_eq!(cache.get(id).unwrap(), None);
+        }
+    }
+
+    #[test]
+    fn test_list() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| IssueId::from(arbitrary::oid()))
+            .collect::<BTreeSet<IssueId>>();
+        let mut issues = Vec::with_capacity(ids.len());
+
+        for id in ids.iter() {
+            let issue = Issue {
+                title: id.to_string(),
+                ..Issue::new(Thread::default())
+            };
+            cache
+                .update(&cache.rid(), &IssueId::from(*id), &issue)
+                .unwrap();
+            issues.push((*id, issue));
+        }
+
+        let mut list = cache
+            .list()
+            .unwrap()
+            .collect::<Result<Vec<_>, _>>()
+            .unwrap();
+        list.sort_by_key(|(id, _)| *id);
+        issues.sort_by_key(|(id, _)| *id);
+        assert_eq!(issues, list);
+    }
+
+    #[test]
+    fn test_remove() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| IssueId::from(arbitrary::oid()))
+            .collect::<BTreeSet<IssueId>>();
+
+        for id in ids.iter() {
+            let issue = Issue {
+                title: id.to_string(),
+                ..Issue::new(Thread::default())
+            };
+            cache
+                .update(&cache.rid(), &IssueId::from(*id), &issue)
+                .unwrap();
+            assert_eq!(Some(issue), cache.get(id).unwrap());
+            super::Remove::remove(&mut cache, id).unwrap();
+            assert_eq!(None, cache.get(id).unwrap());
+        }
+    }
+}
diff --git a/radicle/src/cob/patch.rs b/radicle/src/cob/patch.rs
index 79e62886..973b9e1b 100644
--- a/radicle/src/cob/patch.rs
+++ b/radicle/src/cob/patch.rs
@@ -1,4 +1,5 @@
-#![allow(clippy::too_many_arguments)]
+pub mod cache;
+
 use std::collections::{BTreeMap, BTreeSet, HashMap};
 use std::fmt;
 use std::ops::Deref;
@@ -7,9 +8,8 @@ use std::str::FromStr;
 use amplify::Wrapper;
 use nonempty::NonEmpty;
 use once_cell::sync::Lazy;
-use serde::ser::SerializeStruct;
 use serde::{Deserialize, Serialize};
-use storage::RepositoryError;
+use storage::{HasRepoId, RepositoryError};
 use thiserror::Error;
 
 use crate::cob;
@@ -27,6 +27,8 @@ use crate::identity::PayloadError;
 use crate::prelude::*;
 use crate::storage;
 
+pub use cache::Cache;
+
 /// Type name of a patch.
 pub static TYPENAME: Lazy<TypeName> =
     Lazy::new(|| FromStr::from_str("xyz.radicle.patch").expect("type name is valid"));
@@ -124,6 +126,18 @@ pub enum Error {
     /// Initialization failed.
     #[error("initialization failed: {0}")]
     Init(&'static str),
+    #[error("failed to update patch {id} in cache: {err}")]
+    CacheUpdate {
+        id: PatchId,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
+    #[error("failed to remove patch {id} from cache : {err}")]
+    CacheRemove {
+        id: PatchId,
+        #[source]
+        err: Box<dyn std::error::Error + Send + Sync + 'static>,
+    },
 }
 
 /// Patch operation.
@@ -359,7 +373,8 @@ impl MergeTarget {
 }
 
 /// Patch state.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct Patch {
     /// Title of the patch.
     pub(super) title: String,
@@ -1301,7 +1316,8 @@ mod lookup {
 }
 
 /// A patch revision.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct Revision {
     /// Author of the revision.
     pub(super) author: Author,
@@ -1320,6 +1336,10 @@ pub struct Revision {
     /// Review comments resolved by this revision.
     pub(super) resolves: BTreeSet<(EntryId, CommentId)>,
     /// Reactions on code locations and revision itself
+    #[serde(
+        serialize_with = "ser::serialize_reactions",
+        deserialize_with = "ser::deserialize_reactions"
+    )]
     pub(super) reactions: BTreeMap<Option<CodeLocation>, Reactions>,
 }
 
@@ -1443,6 +1463,39 @@ impl fmt::Display for State {
     }
 }
 
+impl From<&State> for Status {
+    fn from(value: &State) -> Self {
+        match value {
+            State::Draft => Self::Draft,
+            State::Open { .. } => Self::Open,
+            State::Archived => Self::Archived,
+            State::Merged { .. } => Self::Merged,
+        }
+    }
+}
+
+/// A simplified enumeration of a [`State`] that can be used for
+/// filtering purposes.
+#[derive(Clone, Copy, Debug, Default, PartialEq, Eq)]
+pub enum Status {
+    Draft,
+    #[default]
+    Open,
+    Archived,
+    Merged,
+}
+
+impl fmt::Display for Status {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            Self::Archived => write!(f, "archived"),
+            Self::Draft => write!(f, "draft"),
+            Self::Open => write!(f, "open"),
+            Self::Merged => write!(f, "merged"),
+        }
+    }
+}
+
 /// A lifecycle operation, resulting in a new state.
 #[derive(Default, Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase", tag = "status")]
@@ -1485,7 +1538,8 @@ impl fmt::Display for Verdict {
 }
 
 /// A patch review on a revision.
-#[derive(Debug, Clone, PartialEq, Eq)]
+#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "camelCase")]
 pub struct Review {
     /// Review author.
     pub(super) author: Author,
@@ -1506,23 +1560,6 @@ pub struct Review {
     pub(super) timestamp: Timestamp,
 }
 
-impl Serialize for Review {
-    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
-    where
-        S: serde::ser::Serializer,
-    {
-        let mut state = serializer.serialize_struct("Review", 4)?;
-        state.serialize_field("verdict", &self.verdict())?;
-        state.serialize_field("summary", &self.summary())?;
-        state.serialize_field(
-            "comments",
-            &self.comments().map(|(_, c)| c.body()).collect::<Vec<_>>(),
-        )?;
-        state.serialize_field("timestamp", &self.timestamp())?;
-        state.end()
-    }
-}
-
 impl Review {
     pub fn new(
         author: Author,
@@ -1847,19 +1884,26 @@ impl<R: ReadRepository> store::Transaction<Patch, R> {
     }
 }
 
-pub struct PatchMut<'a, 'g, R> {
+pub struct PatchMut<'a, 'g, R, C> {
     pub id: ObjectId,
 
     patch: Patch,
     store: &'g mut Patches<'a, R>,
+    cache: &'g mut C,
 }
 
-impl<'a, 'g, R> PatchMut<'a, 'g, R>
+impl<'a, 'g, R, C> PatchMut<'a, 'g, R, C>
 where
-    R: ReadRepository + SignRepository + cob::Store + 'static,
+    C: cob::cache::Update<Patch>,
+    R: ReadRepository + SignRepository + cob::Store,
 {
-    pub fn new(id: ObjectId, patch: Patch, store: &'g mut Patches<'a, R>) -> Self {
-        Self { id, patch, store }
+    pub fn new(id: ObjectId, patch: Patch, cache: &'g mut Cache<Patches<'a, R>, C>) -> Self {
+        Self {
+            id,
+            patch,
+            store: &mut cache.store,
+            cache: &mut cache.cache,
+        }
     }
 
     pub fn id(&self) -> &ObjectId {
@@ -1890,6 +1934,12 @@ where
         operations(&mut tx)?;
 
         let (patch, commit) = tx.commit(message, self.id, &mut self.store.raw, signer)?;
+        self.cache
+            .update(&self.store.as_ref().id(), &self.id, &patch)
+            .map_err(|e| Error::CacheUpdate {
+                id: self.id,
+                err: e.into(),
+            })?;
         self.patch = patch;
 
         Ok(commit)
@@ -2214,7 +2264,7 @@ where
     }
 }
 
-impl<'a, 'g, R> Deref for PatchMut<'a, 'g, R> {
+impl<'a, 'g, R, C> Deref for PatchMut<'a, 'g, R, C> {
     type Target = Patch;
 
     fn deref(&self) -> &Self::Target {
@@ -2223,7 +2273,7 @@ impl<'a, 'g, R> Deref for PatchMut<'a, 'g, R> {
 }
 
 /// Detailed information on patch states
-#[derive(Default, Serialize)]
+#[derive(Debug, Default, PartialEq, Eq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct PatchCounts {
     pub open: usize,
@@ -2239,6 +2289,17 @@ impl PatchCounts {
     }
 }
 
+/// Result of looking up a `Patch`'s `Revision`.
+///
+/// See [`Patches::find_by_revision`].
+#[derive(Debug, PartialEq, Eq)]
+pub struct ByRevision {
+    pub id: PatchId,
+    pub patch: Patch,
+    pub revision_id: RevisionId,
+    pub revision: Revision,
+}
+
 pub struct Patches<'a, R> {
     raw: store::Store<'a, Patch, R>,
 }
@@ -2251,6 +2312,15 @@ impl<'a, R> Deref for Patches<'a, R> {
     }
 }
 
+impl<'a, R> HasRepoId for Patches<'a, R>
+where
+    R: ReadRepository,
+{
+    fn rid(&self) -> RepoId {
+        self.as_ref().id()
+    }
+}
+
 impl<'a, R> Patches<'a, R>
 where
     R: ReadRepository + cob::Store,
@@ -2282,23 +2352,27 @@ where
     }
 
     /// Find the `Patch` containing the given `Revision`.
-    pub fn find_by_revision(
-        &self,
-        revision: &RevisionId,
-    ) -> Result<Option<(PatchId, Patch, RevisionId, Revision)>, Error> {
+    pub fn find_by_revision(&self, revision: &RevisionId) -> Result<Option<ByRevision>, Error> {
         // Revision may be the patch's first, making it have the same ID.
         let p_id = ObjectId::from(revision.into_inner());
         if let Some(p) = self.get(&p_id)? {
-            return Ok(p
-                .revision(revision)
-                .map(|r| (p_id, p.clone(), *revision, r.clone())));
+            return Ok(p.revision(revision).map(|r| ByRevision {
+                id: p_id,
+                patch: p.clone(),
+                revision_id: *revision,
+                revision: r.clone(),
+            }));
         }
         let result = self
             .all()?
             .filter_map(|result| result.ok())
             .find_map(|(p_id, p)| {
-                p.revision(revision)
-                    .map(|r| (p_id, p.clone(), *revision, r.clone()))
+                p.revision(revision).map(|r| ByRevision {
+                    id: p_id,
+                    patch: p.clone(),
+                    revision_id: *revision,
+                    revision: r.clone(),
+                })
             });
 
         Ok(result)
@@ -2332,10 +2406,10 @@ where
 
 impl<'a, R> Patches<'a, R>
 where
-    R: ReadRepository + SignRepository + cob::Store + 'static,
+    R: ReadRepository + SignRepository + cob::Store,
 {
     /// Open a new patch.
-    pub fn create<'g, G: Signer>(
+    pub fn create<'g, C, G>(
         &'g mut self,
         title: impl ToString,
         description: impl ToString,
@@ -2343,8 +2417,13 @@ where
         base: impl Into<git::Oid>,
         oid: impl Into<git::Oid>,
         labels: &[Label],
+        cache: &'g mut C,
         signer: &G,
-    ) -> Result<PatchMut<'a, 'g, R>, Error> {
+    ) -> Result<PatchMut<'a, 'g, R, C>, Error>
+    where
+        C: cob::cache::Update<Patch>,
+        G: Signer,
+    {
         self._create(
             title,
             description,
@@ -2353,12 +2432,13 @@ where
             oid,
             labels,
             Lifecycle::default(),
+            cache,
             signer,
         )
     }
 
     /// Draft a patch. This patch will be created in a [`State::Draft`] state.
-    pub fn draft<'g, G: Signer>(
+    pub fn draft<'g, C, G: Signer>(
         &'g mut self,
         title: impl ToString,
         description: impl ToString,
@@ -2366,8 +2446,12 @@ where
         base: impl Into<git::Oid>,
         oid: impl Into<git::Oid>,
         labels: &[Label],
+        cache: &'g mut C,
         signer: &G,
-    ) -> Result<PatchMut<'a, 'g, R>, Error> {
+    ) -> Result<PatchMut<'a, 'g, R, C>, Error>
+    where
+        C: cob::cache::Update<Patch>,
+    {
         self._create(
             title,
             description,
@@ -2376,12 +2460,17 @@ where
             oid,
             labels,
             Lifecycle::Draft,
+            cache,
             signer,
         )
     }
 
     /// Get a patch mutably.
-    pub fn get_mut<'g>(&'g mut self, id: &ObjectId) -> Result<PatchMut<'a, 'g, R>, store::Error> {
+    pub fn get_mut<'g, C>(
+        &'g mut self,
+        id: &ObjectId,
+        cache: &'g mut C,
+    ) -> Result<PatchMut<'a, 'g, R, C>, store::Error> {
         let patch = self
             .raw
             .get(id)?
@@ -2391,11 +2480,12 @@ where
             id: *id,
             patch,
             store: self,
+            cache,
         })
     }
 
     /// Create a patch. This is an internal function used by `create` and `draft`.
-    fn _create<'g, G: Signer>(
+    fn _create<'g, C, G: Signer>(
         &'g mut self,
         title: impl ToString,
         description: impl ToString,
@@ -2404,8 +2494,12 @@ where
         oid: impl Into<git::Oid>,
         labels: &[Label],
         state: Lifecycle,
+        cache: &'g mut C,
         signer: &G,
-    ) -> Result<PatchMut<'a, 'g, R>, Error> {
+    ) -> Result<PatchMut<'a, 'g, R, C>, Error>
+    where
+        C: cob::cache::Update<Patch>,
+    {
         let (id, patch) = Transaction::initial("Create patch", &mut self.raw, signer, |tx| {
             tx.revision(description, base, oid)?;
             tx.edit(title, target)?;
@@ -2418,8 +2512,135 @@ where
             }
             Ok(())
         })?;
+        cache
+            .update(&self.raw.as_ref().id(), &id, &patch)
+            .map_err(|e| Error::CacheUpdate { id, err: e.into() })?;
 
-        Ok(PatchMut::new(id, patch, self))
+        Ok(PatchMut {
+            id,
+            patch,
+            store: self,
+            cache,
+        })
+    }
+}
+
+/// Helpers for de/serialization of patch data types.
+mod ser {
+    use std::collections::{BTreeMap, BTreeSet};
+
+    use serde::ser::SerializeSeq;
+
+    use crate::cob::{thread::Reactions, ActorId, CodeLocation};
+
+    /// Serialize a `Revision`'s reaction as an object containing the
+    /// `location`, `emoji`, and all `authors` that have performed the
+    /// same reaction.
+    #[derive(Debug, serde::Serialize, serde::Deserialize)]
+    #[serde(rename_all = "camelCase")]
+    struct Reaction {
+        location: Option<CodeLocation>,
+        emoji: super::Reaction,
+        authors: Vec<ActorId>,
+    }
+
+    impl Reaction {
+        fn as_revision_reactions(
+            reactions: Vec<Reaction>,
+        ) -> BTreeMap<Option<CodeLocation>, Reactions> {
+            reactions.into_iter().fold(
+                BTreeMap::<Option<CodeLocation>, Reactions>::new(),
+                |mut reactions,
+                 Reaction {
+                     location,
+                     emoji,
+                     authors,
+                 }| {
+                    let mut inner = authors
+                        .into_iter()
+                        .map(|author| (author, emoji))
+                        .collect::<BTreeSet<_>>();
+                    let entry = reactions.entry(location).or_default();
+                    entry.append(&mut inner);
+                    reactions
+                },
+            )
+        }
+    }
+
+    /// Helper to serialize a `Revision`'s reactions, since
+    /// `CodeLocation` cannot be a key for a JSON object.
+    ///
+    /// The set `reactions` are first turned into a set of
+    /// [`Reaction`]s and then serialized via a `Vec`.
+    pub fn serialize_reactions<S>(
+        reactions: &BTreeMap<Option<CodeLocation>, Reactions>,
+        serializer: S,
+    ) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        let reactions = reactions
+            .iter()
+            .flat_map(|(location, reaction)| {
+                let reactions = reaction.iter().fold(
+                    BTreeMap::new(),
+                    |mut acc: BTreeMap<&super::Reaction, Vec<_>>, (author, emoji)| {
+                        acc.entry(emoji).or_default().push(*author);
+                        acc
+                    },
+                );
+                reactions
+                    .into_iter()
+                    .map(|(emoji, authors)| Reaction {
+                        location: location.clone(),
+                        emoji: *emoji,
+                        authors,
+                    })
+                    .collect::<Vec<_>>()
+            })
+            .collect::<Vec<_>>();
+        let mut s = serializer.serialize_seq(Some(reactions.len()))?;
+        for r in &reactions {
+            s.serialize_element(r)?;
+        }
+        s.end()
+    }
+
+    /// Helper to deserialize a `Revision`'s reactions, the inverse of
+    /// `serialize_reactions`.
+    ///
+    /// The `Vec` of [`Reaction`]s are deserialized and converted to a
+    /// `BTreeMap<Option<CodeLocation>, Reactions>`.
+    pub fn deserialize_reactions<'de, D>(
+        deserializer: D,
+    ) -> Result<BTreeMap<Option<CodeLocation>, Reactions>, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        struct ReactionsVisitor;
+
+        impl<'de> serde::de::Visitor<'de> for ReactionsVisitor {
+            type Value = Vec<Reaction>;
+
+            fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+                formatter.write_str("a reaction of the form {'location', 'emoji', 'authors'}")
+            }
+
+            fn visit_seq<A>(self, mut seq: A) -> Result<Self::Value, A::Error>
+            where
+                A: serde::de::SeqAccess<'de>,
+            {
+                let mut reactions = Vec::new();
+                while let Some(reaction) = seq.next_element()? {
+                    reactions.push(reaction);
+                }
+                Ok(reactions)
+            }
+        }
+
+        let reactions = deserializer.deserialize_seq(ReactionsVisitor)?;
+        Ok(Reaction::as_revision_reactions(reactions))
     }
 }
 
@@ -2437,6 +2658,7 @@ mod test {
     use crate::cob::test::Actor;
     use crate::crypto::test::signer::MockSigner;
     use crate::identity;
+    use crate::patch::cache::Patches as _;
     use crate::test;
     use crate::test::arbitrary;
     use crate::test::arbitrary::gen;
@@ -2453,12 +2675,54 @@ mod test {
         );
     }
 
+    #[test]
+    fn test_reactions_json_serialization() {
+        #[derive(Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
+        #[serde(rename_all = "camelCase")]
+        struct TestReactions {
+            #[serde(
+                serialize_with = "super::ser::serialize_reactions",
+                deserialize_with = "super::ser::deserialize_reactions"
+            )]
+            inner: BTreeMap<Option<CodeLocation>, Reactions>,
+        }
+
+        let reactions = TestReactions {
+            inner: [(
+                None,
+                [
+                    (
+                        "z6Mkk7oqY4pPxhMmGEotDYsFo97vhCj85BLY1H256HrJmjN8"
+                            .parse()
+                            .unwrap(),
+                        Reaction::new('🚀').unwrap(),
+                    ),
+                    (
+                        "z6MknSLrJoTcukLrE435hVNQT4JUhbvWLX4kUzqkEStBU8Vi"
+                            .parse()
+                            .unwrap(),
+                        Reaction::new('🙏').unwrap(),
+                    ),
+                ]
+                .into_iter()
+                .collect(),
+            )]
+            .into_iter()
+            .collect(),
+        };
+
+        assert_eq!(
+            reactions,
+            serde_json::from_str(&serde_json::to_string(&reactions).unwrap()).unwrap()
+        );
+    }
+
     #[test]
     fn test_patch_create_and_get() {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let author: Did = alice.signer.public_key().into();
         let target = MergeTarget::Delegates;
         let patch = patches
@@ -2491,7 +2755,7 @@ mod test {
         assert_eq!(revision.oid, branch.oid);
         assert_eq!(revision.base, branch.base);
 
-        let (id, _, _, _) = patches.find_by_revision(&rev_id).unwrap().unwrap();
+        let ByRevision { id, .. } = patches.find_by_revision(&rev_id).unwrap().unwrap();
         assert_eq!(id, patch_id);
     }
 
@@ -2500,7 +2764,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let patch = patches
             .create(
                 "My first patch",
@@ -2533,7 +2797,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2564,7 +2828,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2616,7 +2880,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2804,7 +3068,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2847,7 +3111,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2894,7 +3158,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2928,7 +3192,7 @@ mod test {
         let alice = test::setup::NodeWithRepo::default();
         let checkout = alice.repo.checkout();
         let branch = checkout.branch_with([("README", b"Hello World!")]);
-        let mut patches = Patches::open(&*alice.repo).unwrap();
+        let mut patches = Cache::no_cache(&*alice.repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
@@ -2977,7 +3241,7 @@ mod test {
         let branch = repo
             .checkout()
             .branch_with([("README.md", b"Hello, World!")]);
-        let mut patches = Patches::open(&*repo).unwrap();
+        let mut patches = Cache::no_cache(&*repo).unwrap();
         let mut patch = patches
             .create(
                 "My first patch",
diff --git a/radicle/src/cob/patch/cache.rs b/radicle/src/cob/patch/cache.rs
new file mode 100644
index 00000000..1c0ac4b4
--- /dev/null
+++ b/radicle/src/cob/patch/cache.rs
@@ -0,0 +1,974 @@
+use std::ops::ControlFlow;
+use std::str::FromStr;
+
+use sqlite as sql;
+use thiserror::Error;
+
+use crate::cob;
+use crate::cob::cache::{self, StoreReader};
+use crate::cob::cache::{Remove, StoreWriter, Update};
+use crate::cob::store;
+use crate::cob::{Label, ObjectId, TypeName};
+use crate::crypto::Signer;
+use crate::git;
+use crate::prelude::RepoId;
+use crate::sql::transaction;
+use crate::storage::{HasRepoId, ReadRepository, RepositoryError, SignRepository, WriteRepository};
+
+use super::{
+    ByRevision, MergeTarget, Patch, PatchCounts, PatchId, PatchMut, Revision, RevisionId, State,
+    Status,
+};
+
+/// A set of read-only methods for a [`Patch`] store.
+pub trait Patches {
+    type Error: std::error::Error + Send + Sync + 'static;
+
+    /// An iterator for returning a set of patches from the store.
+    type Iter<'a>: Iterator<Item = Result<(PatchId, Patch), Self::Error>> + 'a
+    where
+        Self: 'a;
+
+    /// Get the `Patch`, identified by `id`, returning `None` if it
+    /// was not found.
+    fn get(&self, id: &PatchId) -> Result<Option<Patch>, Self::Error>;
+
+    /// Get the `Patch` and its `Revision`, identified by the revision
+    /// `id`, returning `None` if it was not found.
+    fn find_by_revision(&self, id: &RevisionId) -> Result<Option<ByRevision>, Self::Error>;
+
+    /// List all patches that are in the store.
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error>;
+
+    /// List all patches in the store that match the provided
+    /// `status`.
+    ///
+    /// Also see [`Patches::opened`], [`Patches::archived`],
+    /// [`Patches::drafted`], [`Patches::merged`].
+    fn list_by_status(&self, status: &Status) -> Result<Self::Iter<'_>, Self::Error>;
+
+    /// Get the [`PatchCounts`] of all the patches in the store.
+    fn counts(&self) -> Result<PatchCounts, Self::Error>;
+
+    /// List all opened patches in the store.
+    fn opened(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.list_by_status(&Status::Open)
+    }
+
+    /// List all archived patches in the store.
+    fn archived(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.list_by_status(&Status::Archived)
+    }
+
+    /// List all drafted patches in the store.
+    fn drafted(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.list_by_status(&Status::Draft)
+    }
+
+    /// List all merged patches in the store.
+    fn merged(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.list_by_status(&Status::Merged)
+    }
+
+    /// Returns `true` if there are no patches in the store.
+    fn is_empty(&self) -> Result<bool, Self::Error> {
+        Ok(self.counts()?.total() == 0)
+    }
+}
+
+/// [`Patches`] store that can also [`Update`] and [`Remove`]
+/// [`Patch`] in/from the store.
+pub trait PatchesMut: Patches + Update<Patch> + Remove<Patch> {}
+
+impl<T> PatchesMut for T where T: Patches + Update<Patch> + Remove<Patch> {}
+
+/// A `Patch` store that relies on the `cache` for reads and as a
+/// write-through cache.
+///
+/// The `store` is used for the main storage when performing a
+/// write-through. It is also used for identifying which `RepoId` is
+/// being used for the `cache`.
+pub struct Cache<R, C> {
+    pub(super) store: R,
+    pub(super) cache: C,
+}
+
+impl<R, C> Cache<R, C> {
+    pub fn new(store: R, cache: C) -> Self {
+        Self { store, cache }
+    }
+
+    pub fn rid(&self) -> RepoId
+    where
+        R: HasRepoId,
+    {
+        self.store.rid()
+    }
+}
+
+impl<'a, R, C> Cache<super::Patches<'a, R>, C> {
+    /// Create a new [`Patch`] using the [`super::Patches`] as the
+    /// main storage, and writing the update to the `cache`.
+    pub fn create<'g, G>(
+        &'g mut self,
+        title: impl ToString,
+        description: impl ToString,
+        target: MergeTarget,
+        base: impl Into<git::Oid>,
+        oid: impl Into<git::Oid>,
+        labels: &[Label],
+        signer: &G,
+    ) -> Result<PatchMut<'a, 'g, R, C>, super::Error>
+    where
+        R: WriteRepository + cob::Store,
+        G: Signer,
+        C: Update<Patch>,
+    {
+        self.store.create(
+            title,
+            description,
+            target,
+            base,
+            oid,
+            labels,
+            &mut self.cache,
+            signer,
+        )
+    }
+
+    /// Create a new [`Patch`], in a draft state, using the
+    /// [`super::Patches`] as the main storage, and writing the update
+    /// to the `cache`.
+    pub fn draft<'g, G>(
+        &'g mut self,
+        title: impl ToString,
+        description: impl ToString,
+        target: MergeTarget,
+        base: impl Into<git::Oid>,
+        oid: impl Into<git::Oid>,
+        labels: &[Label],
+        signer: &G,
+    ) -> Result<PatchMut<'a, 'g, R, C>, super::Error>
+    where
+        R: WriteRepository + cob::Store,
+        G: Signer,
+        C: Update<Patch>,
+    {
+        self.store.draft(
+            title,
+            description,
+            target,
+            base,
+            oid,
+            labels,
+            &mut self.cache,
+            signer,
+        )
+    }
+
+    /// Remove the given `id` from the [`super::Patches`] storage, and
+    /// removing the entry from the `cache`.
+    pub fn remove<G>(&mut self, id: &PatchId, signer: &G) -> Result<(), super::Error>
+    where
+        G: Signer,
+        R: ReadRepository + SignRepository + cob::Store,
+        C: Remove<Patch>,
+    {
+        self.store.remove(id, signer)?;
+        self.cache
+            .remove(id)
+            .map_err(|e| super::Error::CacheRemove {
+                id: *id,
+                err: e.into(),
+            })?;
+        Ok(())
+    }
+
+    /// Read the given `id` from the [`super::Patches`] store and
+    /// writing it to the `cache`.
+    pub fn write(&mut self, id: &PatchId) -> Result<(), super::Error>
+    where
+        R: ReadRepository + cob::Store,
+        C: Update<Patch>,
+    {
+        let issue = self
+            .store
+            .get(id)?
+            .ok_or_else(|| store::Error::NotFound((*super::TYPENAME).clone(), *id))?;
+        self.update(&self.rid(), id, &issue)
+            .map_err(|e| super::Error::CacheUpdate {
+                id: *id,
+                err: e.into(),
+            })?;
+        Ok(())
+    }
+
+    /// Read all the patches from the [`super::Patches`] store and
+    /// writing them to `cache`.
+    ///
+    /// The `callback` is used for reporting success, failures, and
+    /// progress to the caller. The caller may also decide to continue
+    /// or break from the process.
+    pub fn write_all(
+        &mut self,
+        callback: impl Fn(
+            &Result<(PatchId, Patch), store::Error>,
+            &cache::WriteAllProgress,
+        ) -> ControlFlow<()>,
+    ) -> Result<(), super::Error>
+    where
+        R: ReadRepository + cob::Store,
+        C: Update<Patch>,
+    {
+        let patches = self.store.all()?;
+        let mut progress = cache::WriteAllProgress::new(patches.len());
+        for patch in self.store.all()? {
+            progress.inc();
+            match callback(&patch, &progress) {
+                ControlFlow::Continue(()) => match patch {
+                    Ok((id, patch)) => {
+                        self.update(&self.rid(), &id, &patch)
+                            .map_err(|e| super::Error::CacheUpdate { id, err: e.into() })?;
+                    }
+                    Err(_) => continue,
+                },
+                ControlFlow::Break(()) => break,
+            }
+        }
+        Ok(())
+    }
+}
+
+impl<R> Cache<R, StoreReader> {
+    pub fn reader(store: R, cache: StoreReader) -> Self {
+        Self { store, cache }
+    }
+}
+
+impl<R> Cache<R, StoreWriter> {
+    pub fn open(store: R, cache: StoreWriter) -> Self {
+        Self { store, cache }
+    }
+}
+
+impl<'a, R> Cache<super::Patches<'a, R>, StoreWriter>
+where
+    R: ReadRepository + cob::Store,
+{
+    /// Get the [`PatchMut`], identified by `id`, using the
+    /// `StoreWriter` for retrieving the `Patch`.
+    pub fn get_mut<'g>(
+        &'g mut self,
+        id: &ObjectId,
+    ) -> Result<PatchMut<'a, 'g, R, StoreWriter>, Error> {
+        let patch = Patches::get(self, id)?
+            .ok_or_else(move || Error::NotFound(super::TYPENAME.clone(), *id))?;
+
+        Ok(PatchMut {
+            id: *id,
+            patch,
+            store: &mut self.store,
+            cache: &mut self.cache,
+        })
+    }
+}
+
+impl<'a, R> Cache<super::Patches<'a, R>, cache::NoCache>
+where
+    R: ReadRepository + cob::Store,
+{
+    /// Get a `Cache` that does no write-through modifications and
+    /// uses the [`super::Patches`] store for all reads and writes.
+    pub fn no_cache(repository: &'a R) -> Result<Self, RepositoryError> {
+        let store = super::Patches::open(repository)?;
+        Ok(Self {
+            store,
+            cache: cache::NoCache,
+        })
+    }
+
+    /// Get the [`PatchMut`], identified by `id`.
+    pub fn get_mut<'g>(
+        &'g mut self,
+        id: &ObjectId,
+    ) -> Result<PatchMut<'a, 'g, R, cache::NoCache>, super::Error> {
+        let patch = self
+            .store
+            .get(id)?
+            .ok_or_else(move || store::Error::NotFound(super::TYPENAME.clone(), *id))?;
+
+        Ok(PatchMut {
+            id: *id,
+            patch,
+            store: &mut self.store,
+            cache: &mut self.cache,
+        })
+    }
+}
+
+impl<R, C> cache::Update<Patch> for Cache<R, C>
+where
+    C: cache::Update<Patch>,
+{
+    type Out = <C as cache::Update<Patch>>::Out;
+    type UpdateError = <C as cache::Update<Patch>>::UpdateError;
+
+    fn update(
+        &mut self,
+        rid: &RepoId,
+        id: &radicle_cob::ObjectId,
+        object: &Patch,
+    ) -> Result<Self::Out, Self::UpdateError> {
+        self.cache.update(rid, id, object)
+    }
+}
+
+impl<R, C> cache::Remove<Patch> for Cache<R, C>
+where
+    C: cache::Remove<Patch>,
+{
+    type Out = <C as cache::Remove<Patch>>::Out;
+    type RemoveError = <C as cache::Remove<Patch>>::RemoveError;
+
+    fn remove(&mut self, id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
+        self.cache.remove(id)
+    }
+}
+
+#[derive(Debug, Error)]
+pub enum UpdateError {
+    #[error(transparent)]
+    Json(#[from] serde_json::Error),
+    #[error(transparent)]
+    Sql(#[from] sql::Error),
+}
+
+impl Update<Patch> for StoreWriter {
+    type Out = bool;
+    type UpdateError = UpdateError;
+
+    fn update(
+        &mut self,
+        rid: &RepoId,
+        id: &ObjectId,
+        object: &Patch,
+    ) -> Result<Self::Out, Self::UpdateError> {
+        transaction::<_, UpdateError>(&self.db, move |db| {
+            let mut stmt = db.prepare(
+                "INSERT INTO patches (id, repo, patch)
+                  VALUES (?1, ?2, ?3)
+                  ON CONFLICT DO UPDATE
+                  SET patch =  (?3)",
+            )?;
+
+            stmt.bind((1, sql::Value::String(id.to_string())))?;
+            stmt.bind((2, rid))?;
+            stmt.bind((3, sql::Value::String(serde_json::to_string(&object)?)))?;
+            stmt.next()?;
+
+            Ok(db.change_count() > 0)
+        })
+    }
+}
+
+impl Remove<Patch> for StoreWriter {
+    type Out = bool;
+    type RemoveError = sql::Error;
+
+    fn remove(&mut self, id: &ObjectId) -> Result<Self::Out, Self::RemoveError> {
+        transaction::<_, sql::Error>(&self.db, move |db| {
+            let mut stmt = db.prepare(
+                "DELETE FROM patches
+                  WHERE id = ?1",
+            )?;
+
+            stmt.bind((1, sql::Value::String(id.to_string())))?;
+            stmt.next()?;
+
+            Ok(db.change_count() > 0)
+        })
+    }
+}
+
+#[derive(Debug, Error)]
+pub enum Error {
+    #[error("object `{1}` of type `{0}` was not found")]
+    NotFound(TypeName, ObjectId),
+    #[error(transparent)]
+    Object(#[from] cob::object::ParseObjectId),
+    #[error(transparent)]
+    Json(#[from] serde_json::Error),
+    #[error(transparent)]
+    Sql(#[from] sql::Error),
+}
+
+/// Iterator that returns a set of patches based on an SQL query.
+///
+/// The query is expected to return rows with columns identified by
+/// the `id` and `patch` names.
+pub struct PatchesIter<'a> {
+    inner: sql::CursorWithOwnership<'a>,
+}
+
+impl<'a> PatchesIter<'a> {
+    fn parse_row(row: sql::Row) -> Result<(PatchId, Patch), Error> {
+        let id = PatchId::from_str(row.read::<&str, _>("id"))?;
+        let patch = serde_json::from_str::<Patch>(row.read::<&str, _>("patch"))?;
+        Ok((id, patch))
+    }
+}
+
+impl<'a> Iterator for PatchesIter<'a> {
+    type Item = Result<(PatchId, Patch), Error>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        let row = self.inner.next()?;
+        Some(row.map_err(Error::from).and_then(PatchesIter::parse_row))
+    }
+}
+
+impl<R> Patches for Cache<R, StoreReader>
+where
+    R: HasRepoId,
+{
+    type Error = Error;
+    type Iter<'b> = PatchesIter<'b>
+    where
+        Self: 'b;
+
+    fn get(&self, id: &PatchId) -> Result<Option<Patch>, Self::Error> {
+        query::get(&self.cache.db, &self.rid(), id)
+    }
+
+    fn find_by_revision(&self, id: &RevisionId) -> Result<Option<ByRevision>, Error> {
+        query::find_by_revision(&self.cache.db, &self.rid(), id)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list(&self.cache.db, &self.rid())
+    }
+
+    fn list_by_status(&self, status: &Status) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list_by_status(&self.cache.db, &self.rid(), status)
+    }
+
+    fn counts(&self) -> Result<PatchCounts, Self::Error> {
+        query::counts(&self.cache.db, &self.rid())
+    }
+}
+
+pub struct NoCacheIter<'a> {
+    inner: Box<dyn Iterator<Item = Result<(PatchId, Patch), super::Error>> + 'a>,
+}
+
+impl<'a> Iterator for NoCacheIter<'a> {
+    type Item = Result<(PatchId, Patch), super::Error>;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        self.inner.next()
+    }
+}
+
+impl<'a, R> Patches for Cache<super::Patches<'a, R>, cache::NoCache>
+where
+    R: ReadRepository + cob::Store,
+{
+    type Error = super::Error;
+    type Iter<'b> = NoCacheIter<'b> where Self: 'b;
+
+    fn get(&self, id: &PatchId) -> Result<Option<Patch>, Self::Error> {
+        self.store.get(id).map_err(super::Error::from)
+    }
+
+    fn find_by_revision(&self, id: &RevisionId) -> Result<Option<ByRevision>, Self::Error> {
+        self.store.find_by_revision(id)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        self.store
+            .all()
+            .map(|inner| NoCacheIter {
+                inner: Box::new(inner.into_iter().map(|res| res.map_err(super::Error::from))),
+            })
+            .map_err(super::Error::from)
+    }
+
+    fn list_by_status(&self, status: &Status) -> Result<Self::Iter<'_>, Self::Error> {
+        let status = *status;
+        self.store
+            .all()
+            .map(move |inner| NoCacheIter {
+                inner: Box::new(inner.into_iter().filter_map(move |res| {
+                    match res {
+                        Ok((id, patch)) => (status == Status::from(&patch.state))
+                            .then_some((id, patch))
+                            .map(Ok),
+                        Err(e) => Some(Err(e.into())),
+                    }
+                })),
+            })
+            .map_err(super::Error::from)
+    }
+
+    fn counts(&self) -> Result<PatchCounts, Self::Error> {
+        self.store.counts().map_err(super::Error::from)
+    }
+}
+
+impl<R> Patches for Cache<R, StoreWriter>
+where
+    R: HasRepoId,
+{
+    type Error = Error;
+    type Iter<'b> = PatchesIter<'b>
+    where
+        Self: 'b;
+
+    fn get(&self, id: &PatchId) -> Result<Option<Patch>, Self::Error> {
+        query::get(&self.cache.db, &self.rid(), id)
+    }
+
+    fn find_by_revision(&self, id: &RevisionId) -> Result<Option<ByRevision>, Error> {
+        query::find_by_revision(&self.cache.db, &self.rid(), id)
+    }
+
+    fn list(&self) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list(&self.cache.db, &self.rid())
+    }
+
+    fn list_by_status(&self, status: &Status) -> Result<Self::Iter<'_>, Self::Error> {
+        query::list_by_status(&self.cache.db, &self.rid(), status)
+    }
+
+    fn counts(&self) -> Result<PatchCounts, Self::Error> {
+        query::counts(&self.cache.db, &self.rid())
+    }
+}
+
+/// Helper SQL queries for [ `Patches`] trait implementations.
+mod query {
+    use sqlite as sql;
+
+    use crate::patch::Status;
+
+    use super::*;
+
+    pub(super) fn get(
+        db: &sql::ConnectionThreadSafe,
+        rid: &RepoId,
+        id: &PatchId,
+    ) -> Result<Option<Patch>, Error> {
+        let id = sql::Value::String(id.to_string());
+        let mut stmt = db.prepare(
+            "SELECT patch
+             FROM patches
+             WHERE id = ?1 AND repo = ?2",
+        )?;
+
+        stmt.bind((1, id))?;
+        stmt.bind((2, rid))?;
+
+        match stmt.into_iter().next().transpose()? {
+            None => Ok(None),
+            Some(row) => {
+                let patch = row.read::<&str, _>("patch");
+                let patch = serde_json::from_str(patch)?;
+                Ok(Some(patch))
+            }
+        }
+    }
+
+    pub(super) fn find_by_revision(
+        db: &sql::ConnectionThreadSafe,
+        rid: &RepoId,
+        id: &RevisionId,
+    ) -> Result<Option<ByRevision>, Error> {
+        let revision_id = *id;
+        let mut stmt = db.prepare(
+            "SELECT patches.id, patch, revisions.value AS revision
+             FROM patches, json_tree(patches.patch, '$.revisions') AS revisions
+             WHERE repo = ?1
+             AND revisions.key = ?2
+            ",
+        )?;
+        stmt.bind((1, rid))?;
+        stmt.bind((2, sql::Value::String(id.to_string())))?;
+
+        match stmt.into_iter().next().transpose()? {
+            None => Ok(None),
+            Some(row) => {
+                let id = PatchId::from_str(row.read::<&str, _>("id"))?;
+                let patch = serde_json::from_str::<Patch>(row.read::<&str, _>("patch"))?;
+                let revision = serde_json::from_str::<Revision>(row.read::<&str, _>("revision"))?;
+                Ok(Some(ByRevision {
+                    id,
+                    patch,
+                    revision_id,
+                    revision,
+                }))
+            }
+        }
+    }
+
+    pub(super) fn list<'a>(
+        db: &'a sql::ConnectionThreadSafe,
+        rid: &RepoId,
+    ) -> Result<PatchesIter<'a>, Error> {
+        let mut stmt = db.prepare(
+            "SELECT id, patch
+             FROM patches
+             WHERE repo = ?1
+             ORDER BY id
+            ",
+        )?;
+        stmt.bind((1, rid))?;
+        Ok(PatchesIter {
+            inner: stmt.into_iter(),
+        })
+    }
+
+    pub(super) fn list_by_status<'a>(
+        db: &'a sql::ConnectionThreadSafe,
+        rid: &RepoId,
+        filter: &Status,
+    ) -> Result<PatchesIter<'a>, Error> {
+        let mut stmt = db.prepare(
+            "SELECT patches.id, patch
+             FROM patches
+             WHERE repo = ?1
+             AND patch->>'$.state.status' = ?2
+             ORDER BY id
+            ",
+        )?;
+        stmt.bind((1, rid))?;
+        stmt.bind((2, sql::Value::String(filter.to_string())))?;
+        Ok(PatchesIter {
+            inner: stmt.into_iter(),
+        })
+    }
+
+    pub(super) fn counts(
+        db: &sql::ConnectionThreadSafe,
+        rid: &RepoId,
+    ) -> Result<PatchCounts, Error> {
+        let mut stmt = db.prepare(
+            "SELECT
+                 patch->'$.state' AS state,
+                 COUNT(*) AS count
+             FROM patches
+             WHERE repo = ?1
+             GROUP BY patch->'$.state.status'",
+        )?;
+        stmt.bind((1, rid))?;
+
+        stmt.into_iter()
+            .try_fold(PatchCounts::default(), |mut counts, row| {
+                let row = row?;
+                let count = row.read::<i64, _>("count") as usize;
+                let status = serde_json::from_str::<State>(row.read::<&str, _>("state"))?;
+                match status {
+                    State::Draft => counts.draft += count,
+                    State::Open { .. } => counts.open += count,
+                    State::Archived => counts.archived += count,
+                    State::Merged { .. } => counts.merged += count,
+                }
+                Ok(counts)
+            })
+    }
+}
+
+#[allow(clippy::unwrap_used)]
+#[cfg(test)]
+mod tests {
+    use std::collections::{BTreeMap, BTreeSet};
+    use std::num::NonZeroU8;
+    use std::str::FromStr;
+
+    use amplify::Wrapper;
+    use radicle_cob::ObjectId;
+
+    use crate::cob::cache::{Store, Update, Write};
+    use crate::cob::thread::{Comment, Thread};
+    use crate::cob::{Author, Timestamp};
+    use crate::patch::{
+        ByRevision, MergeTarget, Patch, PatchCounts, PatchId, Revision, RevisionId, State, Status,
+    };
+    use crate::prelude::Did;
+    use crate::test::arbitrary;
+    use crate::test::storage::MockRepository;
+
+    use super::{Cache, Patches};
+
+    fn memory(store: MockRepository) -> Cache<MockRepository, Store<Write>> {
+        let cache = Store::<Write>::memory().unwrap();
+        Cache { store, cache }
+    }
+
+    fn revision() -> (RevisionId, Revision) {
+        let author = arbitrary::gen::<Did>(1);
+        let description = arbitrary::gen::<String>(1);
+        let base = arbitrary::oid();
+        let oid = arbitrary::oid();
+        let timestamp = Timestamp::now();
+        let resolves = BTreeSet::new();
+        let mut revision = Revision::new(
+            Author { id: author },
+            description,
+            base,
+            oid,
+            timestamp,
+            resolves,
+        );
+        let comment = Comment::new(
+            *author,
+            "#1 comment".to_string(),
+            None,
+            None,
+            vec![],
+            Timestamp::now(),
+        );
+        let thread = Thread::new(arbitrary::oid(), comment);
+        revision.discussion = thread;
+        let id = RevisionId::from(arbitrary::oid());
+        (id, revision)
+    }
+
+    #[test]
+    fn test_is_empty() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        assert!(cache.is_empty().unwrap());
+
+        let patch = Patch::new("Patch #1".to_string(), MergeTarget::Delegates, revision());
+        let id = ObjectId::from_str("47799cbab2eca047b6520b9fce805da42b49ecab").unwrap();
+        cache.update(&cache.rid(), &id, &patch).unwrap();
+
+        let patch = Patch {
+            state: State::Archived,
+            ..Patch::new("Patch #2".to_string(), MergeTarget::Delegates, revision())
+        };
+        let id = ObjectId::from_str("ae981ded6ed2ed2cdba34c8603714782667f18a3").unwrap();
+        cache.update(&cache.rid(), &id, &patch).unwrap();
+
+        assert!(!cache.is_empty().unwrap())
+    }
+
+    #[test]
+    fn test_counts() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let n_open = arbitrary::gen::<u8>(0);
+        let n_draft = arbitrary::gen::<u8>(1);
+        let n_archived = arbitrary::gen::<u8>(1);
+        let n_merged = arbitrary::gen::<u8>(1);
+        let open_ids = (0..n_open)
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let draft_ids = (0..n_draft)
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let archived_ids = (0..n_archived)
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let merged_ids = (0..n_merged)
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+
+        for id in open_ids.iter() {
+            let patch = Patch::new(id.to_string(), MergeTarget::Delegates, revision());
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+        }
+
+        for id in draft_ids.iter() {
+            let patch = Patch {
+                state: State::Draft,
+                ..Patch::new(id.to_string(), MergeTarget::Delegates, revision())
+            };
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+        }
+
+        for id in archived_ids.iter() {
+            let patch = Patch {
+                state: State::Archived,
+                ..Patch::new(id.to_string(), MergeTarget::Delegates, revision())
+            };
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+        }
+
+        for id in merged_ids.iter() {
+            let patch = Patch {
+                state: State::Merged {
+                    revision: arbitrary::oid().into(),
+                    commit: arbitrary::oid(),
+                },
+                ..Patch::new(id.to_string(), MergeTarget::Delegates, revision())
+            };
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+        }
+
+        assert_eq!(
+            cache.counts().unwrap(),
+            PatchCounts {
+                open: open_ids.len(),
+                draft: draft_ids.len(),
+                archived: archived_ids.len(),
+                merged: merged_ids.len(),
+            }
+        );
+    }
+
+    #[test]
+    fn test_get() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let missing = (0..arbitrary::gen::<u8>(2))
+            .filter_map(|_| {
+                let id = PatchId::from(arbitrary::oid());
+                (!ids.contains(&id)).then_some(id)
+            })
+            .collect::<BTreeSet<PatchId>>();
+        let mut patches = Vec::with_capacity(ids.len());
+
+        for id in ids.iter() {
+            let patch = Patch::new(id.to_string(), MergeTarget::Delegates, revision());
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+            patches.push((*id, patch));
+        }
+
+        for (id, patch) in patches.into_iter() {
+            assert_eq!(Some(patch), cache.get(&id).unwrap());
+        }
+
+        for id in &missing {
+            assert_eq!(cache.get(id).unwrap(), None);
+        }
+    }
+
+    #[test]
+    fn test_find_by_revision() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let patch_id = PatchId::from(arbitrary::oid());
+        let revisions = (0..arbitrary::gen::<NonZeroU8>(1).into())
+            .map(|_| revision())
+            .collect::<BTreeMap<RevisionId, Revision>>();
+        let (rev_id, rev) = revisions
+            .iter()
+            .next()
+            .expect("at least one revision should have been created");
+        let mut patch = Patch::new(
+            patch_id.to_string(),
+            MergeTarget::Delegates,
+            (*rev_id, rev.clone()),
+        );
+        let timeline = revisions.keys().copied().collect::<Vec<_>>();
+        patch
+            .timeline
+            .extend(timeline.iter().map(|id| id.into_inner()));
+        patch
+            .revisions
+            .extend(revisions.iter().map(|(id, rev)| (*id, Some(rev.clone()))));
+        cache
+            .update(&cache.rid(), &PatchId::from(*patch_id), &patch)
+            .unwrap();
+
+        for entry in timeline {
+            let rev = revisions.get(&entry).unwrap().clone();
+            assert_eq!(
+                Some(ByRevision {
+                    id: patch_id,
+                    patch: patch.clone(),
+                    revision_id: entry,
+                    revision: rev
+                }),
+                cache.find_by_revision(&entry).unwrap()
+            );
+        }
+    }
+
+    #[test]
+    fn test_list() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let mut patches = Vec::with_capacity(ids.len());
+
+        for id in ids.iter() {
+            let patch = Patch::new(id.to_string(), MergeTarget::Delegates, revision());
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+            patches.push((*id, patch));
+        }
+
+        let mut list = cache
+            .list()
+            .unwrap()
+            .collect::<Result<Vec<_>, _>>()
+            .unwrap();
+        list.sort_by_key(|(id, _)| *id);
+        patches.sort_by_key(|(id, _)| *id);
+        assert_eq!(patches, list);
+    }
+
+    #[test]
+    fn test_list_by_status() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+        let mut patches = Vec::with_capacity(ids.len());
+
+        for id in ids.iter() {
+            let patch = Patch::new(id.to_string(), MergeTarget::Delegates, revision());
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+            patches.push((*id, patch));
+        }
+
+        let mut list = cache
+            .list_by_status(&Status::Open)
+            .unwrap()
+            .collect::<Result<Vec<_>, _>>()
+            .unwrap();
+        list.sort_by_key(|(id, _)| *id);
+        patches.sort_by_key(|(id, _)| *id);
+        assert_eq!(patches, list);
+    }
+
+    #[test]
+    fn test_remove() {
+        let repo = arbitrary::gen::<MockRepository>(1);
+        let mut cache = memory(repo);
+        let ids = (0..arbitrary::gen::<u8>(1))
+            .map(|_| PatchId::from(arbitrary::oid()))
+            .collect::<BTreeSet<PatchId>>();
+
+        for id in ids.iter() {
+            let patch = Patch::new(id.to_string(), MergeTarget::Delegates, revision());
+            cache
+                .update(&cache.rid(), &PatchId::from(*id), &patch)
+                .unwrap();
+            assert_eq!(Some(patch), cache.get(id).unwrap());
+            super::Remove::remove(&mut cache, id).unwrap();
+            assert_eq!(None, cache.get(id).unwrap());
+        }
+    }
+}
diff --git a/radicle/src/cob/store.rs b/radicle/src/cob/store.rs
index c7c2e618..c34a7fb0 100644
--- a/radicle/src/cob/store.rs
+++ b/radicle/src/cob/store.rs
@@ -5,6 +5,7 @@ use std::fmt::Debug;
 use std::marker::PhantomData;
 
 use nonempty::NonEmpty;
+use radicle_cob::CollaborativeObject;
 use serde::{Deserialize, Serialize};
 
 use crate::cob::op::Op;
@@ -112,7 +113,10 @@ impl<'a, T, R> AsRef<R> for Store<'a, T, R> {
     }
 }
 
-impl<'a, T, R: ReadRepository + cob::Store> Store<'a, T, R> {
+impl<'a, T, R> Store<'a, T, R>
+where
+    R: ReadRepository + cob::Store,
+{
     /// Open a new generic store.
     pub fn open(repo: &'a R) -> Result<Self, Error> {
         Ok(Self {
@@ -234,7 +238,9 @@ where
     }
 
     /// Return all objects.
-    pub fn all(&self) -> Result<impl Iterator<Item = Result<(ObjectId, T), Error>> + 'a, Error> {
+    pub fn all(
+        &self,
+    ) -> Result<impl ExactSizeIterator<Item = Result<(ObjectId, T), Error>> + 'a, Error> {
         let raw = cob::list::<T, _>(self.repo, T::type_name())?;
 
         Ok(raw.into_iter().map(|o| Ok((*o.id(), o.object))))
@@ -271,7 +277,10 @@ impl<T: Cob + cob::Evaluate<R>, R> Default for Transaction<T, R> {
     }
 }
 
-impl<T: Cob + cob::Evaluate<R>, R> Transaction<T, R> {
+impl<T, R> Transaction<T, R>
+where
+    T: Cob + cob::Evaluate<R>,
+{
     /// Create a new transaction to be used as the initial set of operations for a COB.
     pub fn initial<G, F>(
         message: &str,
@@ -324,9 +333,13 @@ impl<T: Cob + cob::Evaluate<R>, R> Transaction<T, R> {
     {
         let actions = NonEmpty::from_vec(self.actions)
             .expect("Transaction::commit: transaction must not be empty");
-        let Updated { head, object, .. } = store.update(id, msg, actions, self.embeds, signer)?;
+        let Updated {
+            head,
+            object: CollaborativeObject { object, .. },
+            ..
+        } = store.update(id, msg, actions, self.embeds, signer)?;
 
-        Ok((object.object, head))
+        Ok((object, head))
     }
 }
 
diff --git a/radicle/src/profile.rs b/radicle/src/profile.rs
index 6ced615c..dd0c4fae 100644
--- a/radicle/src/profile.rs
+++ b/radicle/src/profile.rs
@@ -27,7 +27,8 @@ use crate::prelude::Did;
 use crate::prelude::NodeId;
 use crate::storage::git::transport;
 use crate::storage::git::Storage;
-use crate::{cli, git, node, web};
+use crate::storage::{self, ReadRepository};
+use crate::{cli, cob, git, node, web};
 
 /// Environment variables used by radicle.
 pub mod env {
@@ -104,6 +105,10 @@ pub enum Error {
     NotificationsStore(#[from] node::notifications::store::Error),
     #[error(transparent)]
     DatabaseStore(#[from] node::db::Error),
+    #[error(transparent)]
+    Repository(#[from] storage::RepositoryError),
+    #[error(transparent)]
+    CobsCache(#[from] cob::cache::Error),
 }
 
 #[derive(Debug, Error)]
@@ -410,7 +415,7 @@ impl Home {
             path: path.canonicalize()?,
         };
 
-        for dir in &[home.storage(), home.keys(), home.node()] {
+        for dir in &[home.storage(), home.keys(), home.node(), home.cobs()] {
             if !dir.exists() {
                 fs::create_dir_all(dir)?;
             }
@@ -439,6 +444,10 @@ impl Home {
         self.path.join("node")
     }
 
+    pub fn cobs(&self) -> PathBuf {
+        self.path.join("cobs")
+    }
+
     pub fn socket(&self) -> PathBuf {
         env::var_os(env::RAD_SOCKET)
             .map(PathBuf::from)
@@ -478,6 +487,62 @@ impl Home {
 
         Ok(db)
     }
+
+    /// Return a read-only handle for the issues cache.
+    pub fn issues<'a, R>(
+        &self,
+        repository: &'a R,
+    ) -> Result<cob::issue::Cache<cob::issue::Issues<'a, R>, cob::cache::StoreReader>, Error>
+    where
+        R: ReadRepository + cob::Store,
+    {
+        let path = self.cobs().join(cob::cache::COBS_DB_FILE);
+        let db = cob::cache::Store::reader(path)?;
+        let store = cob::issue::Issues::open(repository)?;
+        Ok(cob::issue::Cache::reader(store, db))
+    }
+
+    /// Return a read-write handle for the issues cache.
+    pub fn issues_mut<'a, R>(
+        &self,
+        repository: &'a R,
+    ) -> Result<cob::issue::Cache<cob::issue::Issues<'a, R>, cob::cache::StoreWriter>, Error>
+    where
+        R: ReadRepository + cob::Store,
+    {
+        let path = self.cobs().join(cob::cache::COBS_DB_FILE);
+        let db = cob::cache::Store::open(path)?;
+        let store = cob::issue::Issues::open(repository)?;
+        Ok(cob::issue::Cache::open(store, db))
+    }
+
+    /// Return a read-only handle for the patches cache.
+    pub fn patches<'a, R>(
+        &self,
+        repository: &'a R,
+    ) -> Result<cob::patch::Cache<cob::patch::Patches<'a, R>, cob::cache::StoreReader>, Error>
+    where
+        R: ReadRepository + cob::Store,
+    {
+        let path = self.cobs().join(cob::cache::COBS_DB_FILE);
+        let db = cob::cache::Store::reader(path)?;
+        let store = cob::patch::Patches::open(repository)?;
+        Ok(cob::patch::Cache::reader(store, db))
+    }
+
+    /// Return a read-write handle for the patches cache.
+    pub fn patches_mut<'a, R>(
+        &self,
+        repository: &'a R,
+    ) -> Result<cob::patch::Cache<cob::patch::Patches<'a, R>, cob::cache::StoreWriter>, Error>
+    where
+        R: ReadRepository + cob::Store,
+    {
+        let path = self.cobs().join(cob::cache::COBS_DB_FILE);
+        let db = cob::cache::Store::open(path)?;
+        let store = cob::patch::Patches::open(repository)?;
+        Ok(cob::patch::Cache::open(store, db))
+    }
 }
 
 // Private methods.
diff --git a/radicle/src/storage.rs b/radicle/src/storage.rs
index a0ba8090..a6308138 100644
--- a/radicle/src/storage.rs
+++ b/radicle/src/storage.rs
@@ -404,6 +404,17 @@ pub trait WriteStorage: ReadStorage {
     fn clean(&self, rid: RepoId) -> Result<Vec<RemoteId>, RepositoryError>;
 }
 
+/// Anything can return the [`RepoId`] that it is associated with.
+pub trait HasRepoId {
+    fn rid(&self) -> RepoId;
+}
+
+impl<T: ReadRepository> HasRepoId for T {
+    fn rid(&self) -> RepoId {
+        ReadRepository::id(self)
+    }
+}
+
 /// Allows read-only access to a repository.
 pub trait ReadRepository: Sized + ValidateRepository {
     /// Return the repository id.