diff --git a/src/templater.rs b/src/templater.rs
index 5c1e278cb..627700589 100644
--- a/src/templater.rs
+++ b/src/templater.rs
@@ -25,11 +25,36 @@ use jujutsu_lib::revset::RevsetExpression;
 use jujutsu_lib::rewrite::merge_commit_trees;
 
 use crate::formatter::Formatter;
+use crate::time_util;
 
 pub trait Template<C> {
     fn format(&self, context: &C, formatter: &mut dyn Formatter) -> io::Result<()>;
 }
 
+impl Template<()> for Signature {
+    fn format(&self, _: &(), formatter: &mut dyn Formatter) -> io::Result<()> {
+        formatter.write_str(&self.name)
+    }
+}
+
+impl Template<()> for String {
+    fn format(&self, _: &(), formatter: &mut dyn Formatter) -> io::Result<()> {
+        formatter.write_str(self)
+    }
+}
+
+impl Template<()> for Timestamp {
+    fn format(&self, _: &(), formatter: &mut dyn Formatter) -> io::Result<()> {
+        formatter.write_str(&time_util::format_absolute_timestamp(self))
+    }
+}
+
+impl Template<()> for bool {
+    fn format(&self, _: &(), formatter: &mut dyn Formatter) -> io::Result<()> {
+        formatter.write_str(if *self { "true" } else { "false" })
+    }
+}
+
 pub struct LiteralTemplate(pub String);
 
 impl<C> Template<C> for LiteralTemplate {
@@ -411,6 +436,12 @@ impl CommitOrChangeId {
     }
 }
 
+impl Template<()> for CommitOrChangeId {
+    fn format(&self, _: &(), formatter: &mut dyn Formatter) -> io::Result<()> {
+        formatter.write_str(&self.hex())
+    }
+}
+
 fn highlight_shortest_prefix(id: &CommitOrChangeId, total_len: usize, repo: RepoRef) -> String {
     let prefix_len = repo
         .base_repo()