diff --git a/src/cob.rs b/src/cob.rs
index 9f6d08b6..5b3e7094 100644
--- a/src/cob.rs
+++ b/src/cob.rs
@@ -29,13 +29,47 @@ use crate::{ergo::Oid, logger, msg::RunId};
 /// Lookup cache for job COBs.
 ///
 /// This assumes job COBs are not removed from the node.
-pub struct KnownJobCobs {
+pub enum KnownJobCobs {
+    Updater(JobUpdater),
+}
+
+impl KnownJobCobs {
+    /// Create a new [`KnownJobCobs`] that updates job COBs.
+    pub fn new() -> Result<Self, JobError> {
+        Ok(Self::Updater(JobUpdater::new()?))
+    }
+
+    /// Look up job COB for a specific commit.
+    pub fn create_job(&mut self, repo_id: RepoId, oid: Oid) -> Option<JobId> {
+        match self {
+            Self::Updater(x) => x.create_job(repo_id, oid),
+        }
+    }
+
+    /// Create a new run for an existing job. The run id should be the one
+    /// assigned by the CI broker, not the one by the adapter. The log URL
+    /// has to be the from the adapter.
+    pub fn create_run(
+        &mut self,
+        repo_id: RepoId,
+        oid: Oid,
+        run_id: RunId,
+        url: &Url,
+        announce: bool,
+    ) {
+        match self {
+            Self::Updater(x) => x.create_run(repo_id, oid, run_id, url, announce),
+        }
+    }
+}
+
+pub struct JobUpdater {
     profile: Profile,
     known: HashMap<(RepoId, Oid), JobId>,
 }
 
-impl KnownJobCobs {
-    /// Create a new [`KnownJobCobs`].
+impl JobUpdater {
+    /// create a new [`knownjobcobs`].
     pub fn new() -> Result<Self, JobError> {
         let profile = Profile::load().map_err(JobError::profile)?;
         Ok(Self {
@@ -44,7 +78,7 @@ impl KnownJobCobs {
         })
     }
 
-    /// Look up job COB for a specific commit.
+    /// look up job cob for a specific commit.
     pub fn create_job(&mut self, repo_id: RepoId, oid: Oid) -> Option<JobId> {
         let key = (repo_id, oid);
         if let Some(job_id) = self.known.get(&key) {
@@ -71,7 +105,7 @@ impl KnownJobCobs {
             }
             Err(err) => {
                 logger::job_failure(
-                    "failed to find job COB for Git object",
+                    "failed to find job cob for git object",
                     &repo_id,
                     &oid,
                     Some(&err),
@@ -85,8 +119,8 @@ impl KnownJobCobs {
         }
     }
 
-    /// Create a new run for an existing job. The run id should be the one
-    /// assigned by the CI broker, not the one by the adapter. The log URL
+    /// create a new run for an existing job. the run id should be the one
+    /// assigned by the ci broker, not the one by the adapter. the log url
     /// has to be the from the adapter.
     pub fn create_run(
         &mut self,
@@ -100,7 +134,7 @@ impl KnownJobCobs {
             && let Err(err) = self.fallible_create_run(job_id, repo_id, run_id, url, announce)
         {
             logger::job_failure(
-                "failed to add a run to a job COB",
+                "failed to add a run to a job cob",
                 &repo_id,
                 &oid,
                 Some(&err),