diff --git a/hive-c0re/src/container_stats.rs b/hive-c0re/src/container_stats.rs
index 898747d2..bf6d71d0 100644
--- a/hive-c0re/src/container_stats.rs
+++ b/hive-c0re/src/container_stats.rs
@@ -83,9 +83,10 @@ fn disk_cache() -> &'static RwLock<HashMap<String, u64>> {
 /// exactly the per-container-only measure we want. Best-effort: a
 /// missing/unreadable path (e.g. a stopped container with no rootfs)
 /// yields `None`, which the caller treats as 0.
-async fn du_bytes(path: &str) -> Option<u64> {
+async fn du_bytes(path: &std::path::Path) -> Option<u64> {
     let out = tokio::process::Command::new("du")
-        .args(["-sxb", path])
+        .arg("-sxb")
+        .arg(path)
         .output()
         .await
         .ok()?;
@@ -96,14 +97,22 @@ async fn du_bytes(path: &str) -> Option<u64> {
     stdout.split_whitespace().next()?.parse::<u64>().ok()
 }
 
-/// Total per-agent disk: state dir (`/agents/<name>/state`, the host
-/// bind-mount) plus the container's writable rootfs
-/// (`/var/lib/nixos-containers/h-<name>`). Each measured with `du -sxb`
-/// so the shared nix store and other bind mounts are excluded. A path
-/// that doesn't exist contributes 0.
+/// Total per-agent disk: the agent's host-side state dir
+/// (`/var/lib/hyperhive/agents/<name>/state`) plus the container's writable
+/// rootfs (`/var/lib/nixos-containers/h-<name>`). Each measured with `du -sxb`
+/// so the shared nix store and other bind mounts are excluded. A path that
+/// doesn't exist contributes 0.
+///
+/// The state dir is resolved via [`Coordinator::agent_notes_dir`] — the same
+/// host path the dashboard reads agent state from. Hardcoding the
+/// container-internal bind-mount path (`/agents/<name>/state`) instead made
+/// `du` fail host-side (that path only exists inside the container), so every
+/// agent's state-dir contribution was 0; with the writable rootfs nearly empty
+/// (almost everything is bind-mounted), that surfaced as all agents reporting
+/// 0 disk.
 async fn measure_agent_disk(name: &str) -> u64 {
-    let state_dir = format!("/agents/{name}/state");
-    let rootfs = format!("{NIXOS_CONTAINERS_ROOT}/h-{name}");
+    let state_dir = Coordinator::agent_notes_dir(name);
+    let rootfs = PathBuf::from(format!("{NIXOS_CONTAINERS_ROOT}/h-{name}"));
     let mut total = 0u64;
     for path in [state_dir, rootfs] {
         if let Some(bytes) = du_bytes(&path).await {