feat(#2017): add hivectl agents list verb showing agent status + technical state

hive-c0re/src/bin/hivectl.rs

@@ -504,6 +504,16 @@ const DEFAULT_HOST_SOCKET: &str = "/run/hyperhive/host.sock";
 
 #[derive(Subcommand)]
 enum AgentsCmd {
+    /// Show all managed agents with their status (running / needs-login /
+    /// needs-update) and technical state (deployed sha, parent, pending
+    /// reminders). The host roster overview; reuses the dashboard's
+    /// per-agent aggregation. Requires the daemon running.
+    List {
+        /// Emit the raw JSON rows instead of the padded table (for
+        /// scripting). The table is the default human-readable shape.
+        #[arg(long)]
+        json: bool,
+    },
     /// Stop and start a single agent container without rebuilding config.
     /// Useful for "kick the container" when the process is stuck or the
     /// container needs a clean restart without changing the NixOS config.
@@ -577,6 +587,7 @@ async fn main() -> Result<()> {
             GatewayCmd::ListUsers { file } => gateway_list_users(&file),
         },
         Cmd::Agents { cmd } => match cmd {
+            AgentsCmd::List { json } => agents_list(&socket, json).await,
             AgentsCmd::Restart { name } => agents_restart(&socket, &name).await,
             AgentsCmd::RestartAll => agents_restart_all(&socket).await,
         },
@@ -1374,6 +1385,82 @@ async fn agents_restart(socket: &Path, name: &str) -> Result<()> {
     }
 }
 
+/// `hivectl agents list` — fetch the per-agent status roster from the
+/// daemon (`HostRequest::AgentStatus`) and render it as a padded table,
+/// or the raw JSON rows with `--json`. Reuses the dashboard's
+/// `ContainerView` aggregation, so the CLI and the web UI never drift.
+async fn agents_list(socket: &Path, json: bool) -> Result<()> {
+    let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::AgentStatus)
+        .await
+        .with_context(|| format!("connect to daemon socket {}", socket.display()))?;
+    if !resp.ok {
+        bail!(
+            "agents list: {}",
+            resp.error.as_deref().unwrap_or("unknown error")
+        );
+    }
+    let rows = resp.agent_statuses.unwrap_or_default();
+    if json {
+        println!("{}", serde_json::to_string_pretty(&rows)?);
+        return Ok(());
+    }
+    if rows.is_empty() {
+        println!("no managed agents found");
+        return Ok(());
+    }
+    // STATUS collapses the health flags into one space-separated token so
+    // the common case (`running`) stays short and anomalies stand out.
+    let status_of = |r: &hive_sh4re::AgentStatusRow| -> String {
+        let mut s = if r.running { "running" } else { "stopped" }.to_owned();
+        if r.needs_login {
+            s.push_str(" needs-login");
+        }
+        if r.needs_update {
+            s.push_str(" needs-update");
+        }
+        s
+    };
+    let headers = ["NAME", "STATUS", "REV", "PARENT", "REMIND"];
+    let table: Vec<[String; 5]> = rows
+        .iter()
+        .map(|r| {
+            [
+                r.name.clone(),
+                status_of(r),
+                r.deployed_sha.clone().unwrap_or_else(|| "-".to_owned()),
+                r.parent.clone().unwrap_or_else(|| "-".to_owned()),
+                if r.pending_reminders > 0 {
+                    r.pending_reminders.to_string()
+                } else {
+                    "-".to_owned()
+                },
+            ]
+        })
+        .collect();
+    let mut widths = headers.map(str::len);
+    for row in &table {
+        for (i, cell) in row.iter().enumerate() {
+            widths[i] = widths[i].max(cell.len());
+        }
+    }
+    let fmt_row = |cells: &[String]| -> String {
+        cells
+            .iter()
+            .enumerate()
+            .map(|(i, c)| format!("{c:<w$}", w = widths[i]))
+            .collect::<Vec<_>>()
+            .join("  ")
+            .trim_end()
+            .to_owned()
+    };
+    let header_cells: Vec<String> = headers.iter().map(|h| (*h).to_owned()).collect();
+    println!("{}", fmt_row(&header_cells));
+    for row in &table {
+        println!("{}", fmt_row(row));
+    }
+    Ok(())
+}
+
 async fn agents_restart_all(socket: &Path) -> Result<()> {
     let resp = hive_c0re::client::request(socket, hive_sh4re::HostRequest::RestartAll)
         .await