diff --git a/Cargo.lock b/Cargo.lock
index ade48f7..be8f974 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2196,7 +2196,7 @@ checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 
 [[package]]
 name = "heph"
-version = "1.2.3"
+version = "0.0.0"
 dependencies = [
  "anyhow",
  "chrono",
@@ -2210,7 +2210,7 @@ dependencies = [
 
 [[package]]
 name = "heph-core"
-version = "1.2.3"
+version = "0.0.0"
 dependencies = [
  "chrono",
  "proptest",
@@ -2227,7 +2227,7 @@ dependencies = [
 
 [[package]]
 name = "heph-quickadd"
-version = "1.2.3"
+version = "0.0.0"
 dependencies = [
  "anyhow",
  "chrono",
@@ -2243,7 +2243,7 @@ dependencies = [
 
 [[package]]
 name = "heph-tui"
-version = "1.2.3"
+version = "0.0.0"
 dependencies = [
  "anyhow",
  "chrono",
@@ -2259,7 +2259,7 @@ dependencies = [
 
 [[package]]
 name = "hephd"
-version = "1.2.3"
+version = "0.0.0"
 dependencies = [
  "anyhow",
  "apple-native-keyring-store",
diff --git a/Cargo.toml b/Cargo.toml
index f265603..e24c881 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -10,7 +10,7 @@ members = [
 
 [workspace.package]
 edition = "2021"
-version = "1.2.3"
+version = "0.0.0"
 license = "LicenseRef-Proprietary"
 publish = false
 authors = ["Erich Blume <blume.erich@gmail.com>"]
diff --git a/crates/heph-tui/src/fmt.rs b/crates/heph-tui/src/fmt.rs
index 2383a7e..8c49ac9 100644
--- a/crates/heph-tui/src/fmt.rs
+++ b/crates/heph-tui/src/fmt.rs
@@ -30,13 +30,15 @@ pub fn now_ms() -> i64 {
     Local::now().timestamp_millis()
 }
 
-/// A compact "how long ago" for the sync indicator: `just now` under a minute,
-/// then `Nm` / `Nh` / `Nd`. Clamped at zero so a little clock skew never shows a
-/// negative age.
+/// A compact "how long ago" for the sync indicator: `Ns` under a minute, then
+/// `Nm` / `Nh` / `Nd`. Second-granularity under a minute makes the chip a visible
+/// heartbeat (the sync loop runs every 30s) and surfaces a missed beat as the age
+/// climbing, rather than hiding under a flat "just now". Clamped at zero so a
+/// little clock skew never shows a negative age.
 pub fn fmt_age(now_ms: i64, then_ms: i64) -> String {
     let secs = (now_ms - then_ms).max(0) / 1000;
     if secs < 60 {
-        "just now".into()
+        format!("{secs}s")
     } else if secs < 3_600 {
         format!("{}m", secs / 60)
     } else if secs < 86_400 {
@@ -126,13 +128,14 @@ mod tests {
     #[test]
     fn age_is_compact_and_clamped() {
         let now = 1_000_000_000_000;
-        assert_eq!(fmt_age(now, now), "just now");
-        assert_eq!(fmt_age(now, now - 30_000), "just now");
+        assert_eq!(fmt_age(now, now), "0s");
+        assert_eq!(fmt_age(now, now - 30_000), "30s");
+        assert_eq!(fmt_age(now, now - 59_000), "59s");
         assert_eq!(fmt_age(now, now - 5 * 60_000), "5m");
         assert_eq!(fmt_age(now, now - 3 * 3_600_000), "3h");
         assert_eq!(fmt_age(now, now - 2 * 86_400_000), "2d");
         // Clock skew (then in the future) never shows a negative age.
-        assert_eq!(fmt_age(now, now + 10_000), "just now");
+        assert_eq!(fmt_age(now, now + 10_000), "0s");
     }
 
     #[test]
diff --git a/crates/heph-tui/src/ui.rs b/crates/heph-tui/src/ui.rs
index b457818..6e15453 100644
--- a/crates/heph-tui/src/ui.rs
+++ b/crates/heph-tui/src/ui.rs
@@ -661,10 +661,7 @@ mod tests {
             last_success_ms: Some(NOW),
             ..Default::default()
         };
-        assert_eq!(
-            render(&spoke(h.clone(), 1), NOW),
-            "⟳ just now  ⚠ 1 conflict"
-        );
-        assert_eq!(render(&spoke(h, 3), NOW), "⟳ just now  ⚠ 3 conflicts");
+        assert_eq!(render(&spoke(h.clone(), 1), NOW), "⟳ 0s  ⚠ 1 conflict");
+        assert_eq!(render(&spoke(h, 3), NOW), "⟳ 0s  ⚠ 3 conflicts");
     }
 }
diff --git a/docs/changelog.d/+sync-age-seconds.feature.md b/docs/changelog.d/+sync-age-seconds.feature.md
new file mode 100644
index 0000000..cf453c2
--- /dev/null
+++ b/docs/changelog.d/+sync-age-seconds.feature.md
@@ -0,0 +1 @@
+heph-tui's sync indicator now shows the last-sync age in seconds under a minute (`⟳ 26s`) instead of a flat `just now`, so the chip reads as a live heartbeat and a missed sync (the loop runs every 30s) shows up as the age climbing.