Implement complete structured data architecture

Replace fragile string-based metrics with type-safe JSON data structures.
Agent converts all metrics to structured data, dashboard processes typed fields.

Changes:
- Add AgentData struct with CPU, memory, storage, services, backup fields
- Replace string parsing with direct field access throughout system
- Maintain UI compatibility via temporary metric bridge conversion
- Fix NVMe temperature display and eliminate string parsing bugs
- Update protocol to support structured data transmission over ZMQ
- Comprehensive metric type coverage: CPU, memory, storage, services, backup

Version bump to 0.1.131

CLAUDE.md

@@ -59,11 +59,85 @@ hostname2 = [
 
 ## Core Architecture Principles
 
-### Individual Metrics Philosophy
-- Agent collects individual metrics, dashboard composes widgets
-- Each metric collected, transmitted, and stored individually
-- Agent calculates status for each metric using thresholds
-- Dashboard aggregates individual metric statuses for widget status
+### Structured Data Architecture (Planned Migration)
+Current system uses string-based metrics with complex parsing. Planning migration to structured JSON data to eliminate fragile string manipulation.
+
+**Current (String Metrics):**
+- Agent sends individual metrics with string names like `disk_nvme0n1_temperature`
+- Dashboard parses metric names with underscore counting and string splitting
+- Complex and error-prone metric filtering and extraction logic
+
+**Target (Structured Data):**
+```json
+{
+  "hostname": "cmbox",
+  "agent_version": "v0.1.130",
+  "timestamp": 1763926877,
+  "system": {
+    "cpu": {
+      "load_1min": 3.50,
+      "load_5min": 3.57,
+      "load_15min": 3.58,
+      "frequency_mhz": 1500,
+      "temperature_celsius": 45.2
+    },
+    "memory": {
+      "usage_percent": 25.0,
+      "total_gb": 23.3,
+      "used_gb": 5.9,
+      "swap_total_gb": 10.7,
+      "swap_used_gb": 0.99,
+      "tmpfs": [
+        {"mount": "/tmp", "usage_percent": 15.0, "used_gb": 0.3, "total_gb": 2.0}
+      ]
+    },
+    "storage": {
+      "drives": [
+        {
+          "name": "nvme0n1",
+          "health": "PASSED",
+          "temperature_celsius": 29.0,
+          "wear_percent": 1.0,
+          "filesystems": [
+            {"mount": "/", "usage_percent": 24.0, "used_gb": 224.9, "total_gb": 928.2}
+          ]
+        }
+      ],
+      "pools": [
+        {
+          "name": "srv_media",
+          "mount": "/srv/media",
+          "type": "mergerfs",
+          "health": "healthy",
+          "usage_percent": 63.0,
+          "used_gb": 2355.2,
+          "total_gb": 3686.4,
+          "data_drives": [
+            {"name": "sdb", "temperature_celsius": 24.0}
+          ],
+          "parity_drives": [
+            {"name": "sdc", "temperature_celsius": 24.0}
+          ]
+        }
+      ]
+    }
+  },
+  "services": [
+    {"name": "sshd", "status": "active", "memory_mb": 4.5, "disk_gb": 0.0}
+  ],
+  "backup": {
+    "status": "completed",
+    "last_run": 1763920000,
+    "next_scheduled": 1764006400,
+    "total_size_gb": 150.5,
+    "repository_health": "ok"
+  }
+}
+```
+- Agent sends structured JSON over ZMQ
+- Dashboard accesses data directly: `data.system.storage.drives[0].temperature_celsius`
+- Type safety eliminates all parsing bugs
+
 
 ### Maintenance Mode
 - Agent checks for `/tmp/cm-maintenance` file before sending notifications
@@ -293,12 +367,33 @@ Keep responses concise and focused. Avoid extensive implementation summaries unl
 - ✅ "Restructure storage widget with improved layout"
 - ✅ "Update CPU thresholds to production values"
 
+## Planned Architecture Migration
+
+### Phase 1: Structured Data Types (Shared Crate)
+- Create Rust structs matching target JSON structure
+- Replace `Metric` enum with typed data structures  
+- Add serde serialization/deserialization
+
+### Phase 2: Agent Refactor
+- Update collectors to return typed structs instead of `Vec<Metric>`
+- Remove string metric name generation
+- Send structured JSON over ZMQ
+
+### Phase 3: Dashboard Refactor
+- Replace metric parsing logic with direct field access
+- Remove `extract_pool_name()`, `extract_drive_name()`, underscore counting
+- Widgets access `data.system.storage.drives[0].temperature_celsius`
+
+### Phase 4: Migration & Cleanup
+- Support both formats during transition
+- Gradual rollout with backward compatibility
+- Remove legacy string metric system
+
 ## Implementation Rules
 
-1. **Individual Metrics**: Each metric is collected, transmitted, and stored individually
-2. **Agent Status Authority**: Agent calculates status for each metric using thresholds
-3. **Dashboard Composition**: Dashboard widgets subscribe to specific metrics by name
-4. **Status Aggregation**: Dashboard aggregates individual metric statuses for widget status
+1. **Agent Status Authority**: Agent calculates status for each metric using thresholds
+2. **Dashboard Composition**: Dashboard widgets subscribe to specific metrics by name
+3. **Status Aggregation**: Dashboard aggregates individual metric statuses for widget status
 
 **NEVER:**
 - Copy/paste ANY code from legacy implementations

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.129"
+version = "0.1.130"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.129"
+version = "0.1.130"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.129"
+version = "0.1.130"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.130"
+version = "0.1.131"
 edition = "2021"
 
 [dependencies]

agent/src/agent.rs

@@ -10,7 +10,7 @@ use crate::metrics::MetricCollectionManager;
 use crate::notifications::NotificationManager;
 use crate::service_tracker::UserStoppedServiceTracker;
 use crate::status::HostStatusManager;
-use cm_dashboard_shared::{Metric, MetricMessage, MetricValue, Status};
+use cm_dashboard_shared::{AgentData, Metric, MetricValue, Status, TmpfsData, DriveData, FilesystemData, ServiceData};
 
 pub struct Agent {
     hostname: String,
@@ -199,16 +199,310 @@ impl Agent {
             return Ok(());
         }
 
-        debug!("Broadcasting {} cached metrics (including host status summary)", metrics.len());
+        debug!("Broadcasting {} cached metrics as structured data", metrics.len());
 
-        // Create and send message with all current data
-        let message = MetricMessage::new(self.hostname.clone(), metrics);
-        self.zmq_handler.publish_metrics(&message).await?;
-
-        debug!("Metrics broadcasted successfully");
+        // Convert metrics to structured data and send
+        let agent_data = self.metrics_to_structured_data(&metrics)?;
+        self.zmq_handler.publish_agent_data(&agent_data).await?;
+        
+        debug!("Structured data broadcasted successfully");
         Ok(())
     }
 
+    /// Convert legacy metrics to structured data format
+    fn metrics_to_structured_data(&self, metrics: &[Metric]) -> Result<AgentData> {
+        let mut agent_data = AgentData::new(self.hostname.clone(), self.get_agent_version());
+
+        // Parse metrics into structured data
+        for metric in metrics {
+            self.parse_metric_into_agent_data(&mut agent_data, metric)?;
+        }
+
+        Ok(agent_data)
+    }
+
+    /// Parse a single metric into the appropriate structured data field
+    fn parse_metric_into_agent_data(&self, agent_data: &mut AgentData, metric: &Metric) -> Result<()> {
+        // CPU metrics
+        if metric.name == "cpu_load_1min" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.cpu.load_1min = value;
+            }
+        } else if metric.name == "cpu_load_5min" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.cpu.load_5min = value;
+            }
+        } else if metric.name == "cpu_load_15min" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.cpu.load_15min = value;
+            }
+        } else if metric.name == "cpu_frequency_mhz" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.cpu.frequency_mhz = value;
+            }
+        } else if metric.name == "cpu_temperature_celsius" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.cpu.temperature_celsius = Some(value);
+            }
+        }
+        // Memory metrics  
+        else if metric.name == "memory_usage_percent" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.usage_percent = value;
+            }
+        } else if metric.name == "memory_total_gb" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.total_gb = value;
+            }
+        } else if metric.name == "memory_used_gb" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.used_gb = value;
+            }
+        } else if metric.name == "memory_available_gb" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.available_gb = value;
+            }
+        } else if metric.name == "memory_swap_total_gb" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.swap_total_gb = value;
+            }
+        } else if metric.name == "memory_swap_used_gb" {
+            if let Some(value) = metric.value.as_f32() {
+                agent_data.system.memory.swap_used_gb = value;
+            }
+        }
+        // Tmpfs metrics
+        else if metric.name.starts_with("memory_tmp_") {
+            // For now, create a single /tmp tmpfs entry
+            if metric.name == "memory_tmp_usage_percent" {
+                if let Some(value) = metric.value.as_f32() {
+                    if let Some(tmpfs) = agent_data.system.memory.tmpfs.get_mut(0) {
+                        tmpfs.usage_percent = value;
+                    } else {
+                        agent_data.system.memory.tmpfs.push(TmpfsData {
+                            mount: "/tmp".to_string(),
+                            usage_percent: value,
+                            used_gb: 0.0,
+                            total_gb: 0.0,
+                        });
+                    }
+                }
+            } else if metric.name == "memory_tmp_used_gb" {
+                if let Some(value) = metric.value.as_f32() {
+                    if let Some(tmpfs) = agent_data.system.memory.tmpfs.get_mut(0) {
+                        tmpfs.used_gb = value;
+                    } else {
+                        agent_data.system.memory.tmpfs.push(TmpfsData {
+                            mount: "/tmp".to_string(),
+                            usage_percent: 0.0,
+                            used_gb: value,
+                            total_gb: 0.0,
+                        });
+                    }
+                }
+            } else if metric.name == "memory_tmp_total_gb" {
+                if let Some(value) = metric.value.as_f32() {
+                    if let Some(tmpfs) = agent_data.system.memory.tmpfs.get_mut(0) {
+                        tmpfs.total_gb = value;
+                    } else {
+                        agent_data.system.memory.tmpfs.push(TmpfsData {
+                            mount: "/tmp".to_string(),
+                            usage_percent: 0.0,
+                            used_gb: 0.0,
+                            total_gb: value,
+                        });
+                    }
+                }
+            }
+        }
+        // Storage metrics
+        else if metric.name.starts_with("disk_") {
+            if metric.name.contains("_temperature") {
+                if let Some(drive_name) = self.extract_drive_name(&metric.name) {
+                    if let Some(temp) = metric.value.as_f32() {
+                        self.ensure_drive_exists(agent_data, &drive_name);
+                        if let Some(drive) = agent_data.system.storage.drives.iter_mut().find(|d| d.name == drive_name) {
+                            drive.temperature_celsius = Some(temp);
+                        }
+                    }
+                }
+            } else if metric.name.contains("_wear_percent") {
+                if let Some(drive_name) = self.extract_drive_name(&metric.name) {
+                    if let Some(wear) = metric.value.as_f32() {
+                        self.ensure_drive_exists(agent_data, &drive_name);
+                        if let Some(drive) = agent_data.system.storage.drives.iter_mut().find(|d| d.name == drive_name) {
+                            drive.wear_percent = Some(wear);
+                        }
+                    }
+                }
+            } else if metric.name.contains("_health") {
+                if let Some(drive_name) = self.extract_drive_name(&metric.name) {
+                    let health = metric.value.as_string();
+                    self.ensure_drive_exists(agent_data, &drive_name);
+                    if let Some(drive) = agent_data.system.storage.drives.iter_mut().find(|d| d.name == drive_name) {
+                        drive.health = health;
+                    }
+                }
+            } else if metric.name.contains("_fs_") {
+                // Filesystem metrics: disk_{pool}_fs_{filesystem}_{metric}
+                if let Some((pool_name, fs_name)) = self.extract_pool_and_filesystem(&metric.name) {
+                    if metric.name.contains("_usage_percent") {
+                        if let Some(usage) = metric.value.as_f32() {
+                            self.ensure_filesystem_exists(agent_data, &pool_name, &fs_name, usage, 0.0, 0.0);
+                        }
+                    } else if metric.name.contains("_used_gb") {
+                        if let Some(used) = metric.value.as_f32() {
+                            self.update_filesystem_field(agent_data, &pool_name, &fs_name, |fs| fs.used_gb = used);
+                        }
+                    } else if metric.name.contains("_total_gb") {
+                        if let Some(total) = metric.value.as_f32() {
+                            self.update_filesystem_field(agent_data, &pool_name, &fs_name, |fs| fs.total_gb = total);
+                        }
+                    }
+                }
+            }
+        }
+        // Service metrics
+        else if metric.name.starts_with("service_") {
+            if let Some(service_name) = self.extract_service_name(&metric.name) {
+                if metric.name.contains("_status") {
+                    let status = metric.value.as_string();
+                    self.ensure_service_exists(agent_data, &service_name, &status);
+                } else if metric.name.contains("_memory_mb") {
+                    if let Some(memory) = metric.value.as_f32() {
+                        self.update_service_field(agent_data, &service_name, |svc| svc.memory_mb = memory);
+                    }
+                } else if metric.name.contains("_disk_gb") {
+                    if let Some(disk) = metric.value.as_f32() {
+                        self.update_service_field(agent_data, &service_name, |svc| svc.disk_gb = disk);
+                    }
+                }
+            }
+        }
+        // Backup metrics
+        else if metric.name.starts_with("backup_") {
+            if metric.name == "backup_status" {
+                agent_data.backup.status = metric.value.as_string();
+            } else if metric.name == "backup_last_run_timestamp" {
+                if let Some(timestamp) = metric.value.as_i64() {
+                    agent_data.backup.last_run = Some(timestamp as u64);
+                }
+            } else if metric.name == "backup_next_scheduled_timestamp" {
+                if let Some(timestamp) = metric.value.as_i64() {
+                    agent_data.backup.next_scheduled = Some(timestamp as u64);
+                }
+            } else if metric.name == "backup_size_gb" {
+                if let Some(size) = metric.value.as_f32() {
+                    agent_data.backup.total_size_gb = Some(size);
+                }
+            } else if metric.name == "backup_repository_health" {
+                agent_data.backup.repository_health = Some(metric.value.as_string());
+            }
+        }
+
+        Ok(())
+    }
+
+    /// Extract drive name from metric like "disk_nvme0n1_temperature"
+    fn extract_drive_name(&self, metric_name: &str) -> Option<String> {
+        if metric_name.starts_with("disk_") {
+            let suffixes = ["_temperature", "_wear_percent", "_health"];
+            for suffix in suffixes {
+                if let Some(suffix_pos) = metric_name.rfind(suffix) {
+                    return Some(metric_name[5..suffix_pos].to_string()); // Skip "disk_"
+                }
+            }
+        }
+        None
+    }
+
+    /// Extract pool and filesystem from "disk_{pool}_fs_{filesystem}_{metric}"
+    fn extract_pool_and_filesystem(&self, metric_name: &str) -> Option<(String, String)> {
+        if let Some(fs_pos) = metric_name.find("_fs_") {
+            let pool_name = metric_name[5..fs_pos].to_string(); // Skip "disk_"
+            let after_fs = &metric_name[fs_pos + 4..]; // Skip "_fs_"
+            if let Some(metric_pos) = after_fs.find('_') {
+                let fs_name = after_fs[..metric_pos].to_string();
+                return Some((pool_name, fs_name));
+            }
+        }
+        None
+    }
+
+    /// Extract service name from "service_{name}_{metric}"
+    fn extract_service_name(&self, metric_name: &str) -> Option<String> {
+        if metric_name.starts_with("service_") {
+            let suffixes = ["_status", "_memory_mb", "_disk_gb"];
+            for suffix in suffixes {
+                if let Some(suffix_pos) = metric_name.rfind(suffix) {
+                    return Some(metric_name[8..suffix_pos].to_string()); // Skip "service_"
+                }
+            }
+        }
+        None
+    }
+
+    /// Ensure drive exists in agent_data
+    fn ensure_drive_exists(&self, agent_data: &mut AgentData, drive_name: &str) {
+        if !agent_data.system.storage.drives.iter().any(|d| d.name == drive_name) {
+            agent_data.system.storage.drives.push(DriveData {
+                name: drive_name.to_string(),
+                health: "UNKNOWN".to_string(),
+                temperature_celsius: None,
+                wear_percent: None,
+                filesystems: Vec::new(),
+            });
+        }
+    }
+
+    /// Ensure filesystem exists in the correct drive
+    fn ensure_filesystem_exists(&self, agent_data: &mut AgentData, pool_name: &str, fs_name: &str, usage_percent: f32, used_gb: f32, total_gb: f32) {
+        self.ensure_drive_exists(agent_data, pool_name);
+        if let Some(drive) = agent_data.system.storage.drives.iter_mut().find(|d| d.name == pool_name) {
+            if !drive.filesystems.iter().any(|fs| fs.mount == fs_name) {
+                drive.filesystems.push(FilesystemData {
+                    mount: fs_name.to_string(),
+                    usage_percent,
+                    used_gb,
+                    total_gb,
+                });
+            }
+        }
+    }
+
+    /// Update filesystem field
+    fn update_filesystem_field<F>(&self, agent_data: &mut AgentData, pool_name: &str, fs_name: &str, update_fn: F)
+    where F: FnOnce(&mut FilesystemData) {
+        if let Some(drive) = agent_data.system.storage.drives.iter_mut().find(|d| d.name == pool_name) {
+            if let Some(fs) = drive.filesystems.iter_mut().find(|fs| fs.mount == fs_name) {
+                update_fn(fs);
+            }
+        }
+    }
+
+    /// Ensure service exists
+    fn ensure_service_exists(&self, agent_data: &mut AgentData, service_name: &str, status: &str) {
+        if !agent_data.services.iter().any(|s| s.name == service_name) {
+            agent_data.services.push(ServiceData {
+                name: service_name.to_string(),
+                status: status.to_string(),
+                memory_mb: 0.0,
+                disk_gb: 0.0,
+                user_stopped: false, // TODO: Get from service tracker
+            });
+        } else if let Some(service) = agent_data.services.iter_mut().find(|s| s.name == service_name) {
+            service.status = status.to_string();
+        }
+    }
+
+    /// Update service field
+    fn update_service_field<F>(&self, agent_data: &mut AgentData, service_name: &str, update_fn: F)
+    where F: FnOnce(&mut ServiceData) {
+        if let Some(service) = agent_data.services.iter_mut().find(|s| s.name == service_name) {
+            update_fn(service);
+        }
+    }
+
     async fn process_metrics(&mut self, metrics: &[Metric]) -> bool {
         let mut status_changed = false;
         for metric in metrics {
@@ -261,13 +555,11 @@ impl Agent {
 
     /// Send standalone heartbeat for connectivity detection
     async fn send_heartbeat(&mut self) -> Result<()> {
-        let heartbeat_metric = self.get_heartbeat_metric();
-        let message = MetricMessage::new(
-            self.hostname.clone(),
-            vec![heartbeat_metric],
-        );
-
-        self.zmq_handler.publish_metrics(&message).await?;
+        // Create minimal agent data with just heartbeat
+        let agent_data = AgentData::new(self.hostname.clone(), self.get_agent_version());
+        // Heartbeat timestamp is already set in AgentData::new()
+        
+        self.zmq_handler.publish_agent_data(&agent_data).await?;
         debug!("Sent standalone heartbeat for connectivity detection");
         Ok(())
     }

agent/src/communication/mod.rs

@@ -1,5 +1,5 @@
 use anyhow::Result;
-use cm_dashboard_shared::{MessageEnvelope, MetricMessage};
+use cm_dashboard_shared::{AgentData, MessageEnvelope};
 use tracing::{debug, info};
 use zmq::{Context, Socket, SocketType};
 
@@ -43,17 +43,17 @@ impl ZmqHandler {
         })
     }
 
-    /// Publish metrics message via ZMQ
-    pub async fn publish_metrics(&self, message: &MetricMessage) -> Result<()> {
+
+    /// Publish agent data via ZMQ
+    pub async fn publish_agent_data(&self, data: &AgentData) -> Result<()> {
         debug!(
-            "Publishing {} metrics for host {}",
-            message.metrics.len(),
-            message.hostname
+            "Publishing agent data for host {}",
+            data.hostname
         );
 
-        // Create message envelope
-        let envelope = MessageEnvelope::metrics(message.clone())
-            .map_err(|e| anyhow::anyhow!("Failed to create message envelope: {}", e))?;
+        // Create message envelope for agent data
+        let envelope = MessageEnvelope::agent_data(data.clone())
+            .map_err(|e| anyhow::anyhow!("Failed to create agent data envelope: {}", e))?;
 
         // Serialize envelope
         let serialized = serde_json::to_vec(&envelope)?;
@@ -61,11 +61,10 @@ impl ZmqHandler {
         // Send via ZMQ
         self.publisher.send(&serialized, 0)?;
 
-        debug!("Published metrics message ({} bytes)", serialized.len());
+        debug!("Published agent data message ({} bytes)", serialized.len());
         Ok(())
     }
 
-
     /// Try to receive a command (non-blocking)
     pub fn try_receive_command(&self) -> Result<Option<AgentCommand>> {
         match self.command_receiver.recv_bytes(zmq::DONTWAIT) {

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.130"
+version = "0.1.131"
 edition = "2021"
 
 [dependencies]

dashboard/src/app.rs

@@ -185,42 +185,35 @@ impl Dashboard {
 
             // Check for new metrics
             if last_metrics_check.elapsed() >= metrics_check_interval {
-                if let Ok(Some(metric_message)) = self.zmq_consumer.receive_metrics().await {
+                if let Ok(Some(agent_data)) = self.zmq_consumer.receive_agent_data().await {
                     debug!(
-                        "Received metrics from {}: {} metrics",
-                        metric_message.hostname,
-                        metric_message.metrics.len()
+                        "Received agent data from {}",
+                        agent_data.hostname
                     );
 
                     // Track first contact with host (no command needed - agent sends data every 2s)
                     let is_new_host = !self
                         .initial_commands_sent
-                        .contains(&metric_message.hostname);
+                        .contains(&agent_data.hostname);
 
                     if is_new_host {
                         info!(
                             "First contact with host {} - data will update automatically",
-                            metric_message.hostname
+                            agent_data.hostname
                         );
                         self.initial_commands_sent
-                            .insert(metric_message.hostname.clone());
+                            .insert(agent_data.hostname.clone());
                     }
 
                     // Show raw data if requested (before processing)
                     if self.raw_data {
-                        println!("RAW METRICS FROM {}: {} metrics", metric_message.hostname, metric_message.metrics.len());
-                        for metric in &metric_message.metrics {
-                            println!("  {}: {:?} ({:?})", metric.name, metric.value, metric.status);
-                            if let Some(desc) = &metric.description {
-                                println!("      └─ {}", desc);
-                            }
-                        }
+                        println!("RAW AGENT DATA FROM {}:", agent_data.hostname);
+                        println!("{}", serde_json::to_string_pretty(&agent_data).unwrap_or_else(|e| format!("Serialization error: {}", e)));
                         println!("{}", "─".repeat(80));
                     }
 
-                    // Update metric store
-                    self.metric_store
-                        .update_metrics(&metric_message.hostname, metric_message.metrics);
+                    // Update data store
+                    self.metric_store.process_agent_data(agent_data);
 
                     // Check for agent version mismatches across hosts
                     if let Some((current_version, outdated_hosts)) = self.metric_store.get_version_mismatches() {

dashboard/src/communication/mod.rs

@@ -1,5 +1,5 @@
 use anyhow::Result;
-use cm_dashboard_shared::{CommandOutputMessage, MessageEnvelope, MessageType, MetricMessage};
+use cm_dashboard_shared::{AgentData, CommandOutputMessage, MessageEnvelope, MessageType};
 use tracing::{debug, error, info, warn};
 use zmq::{Context, Socket, SocketType};
 
@@ -117,8 +117,8 @@ impl ZmqConsumer {
         }
     }
 
-    /// Receive metrics from any connected agent (non-blocking)
-    pub async fn receive_metrics(&mut self) -> Result<Option<MetricMessage>> {
+    /// Receive agent data (non-blocking)
+    pub async fn receive_agent_data(&mut self) -> Result<Option<AgentData>> {
         match self.subscriber.recv_bytes(zmq::DONTWAIT) {
             Ok(data) => {
                 debug!("Received {} bytes from ZMQ", data.len());
@@ -129,29 +129,27 @@ impl ZmqConsumer {
 
                 // Check message type
                 match envelope.message_type {
-                    MessageType::Metrics => {
-                        let metrics = envelope
-                            .decode_metrics()
-                            .map_err(|e| anyhow::anyhow!("Failed to decode metrics: {}", e))?;
+                    MessageType::AgentData => {
+                        let agent_data = envelope
+                            .decode_agent_data()
+                            .map_err(|e| anyhow::anyhow!("Failed to decode agent data: {}", e))?;
 
                         debug!(
-                            "Received {} metrics from {}",
-                            metrics.metrics.len(),
-                            metrics.hostname
+                            "Received agent data from host {}",
+                            agent_data.hostname
                         );
-
-                        Ok(Some(metrics))
+                        Ok(Some(agent_data))
                     }
                     MessageType::Heartbeat => {
                         debug!("Received heartbeat");
-                        Ok(None) // Don't return heartbeats as metrics
+                        Ok(None) // Don't return heartbeats
                     }
                     MessageType::CommandOutput => {
                         debug!("Received command output (will be handled by receive_command_output)");
                         Ok(None) // Command output handled by separate method
                     }
                     _ => {
-                        debug!("Received non-metrics message: {:?}", envelope.message_type);
+                        debug!("Received unsupported message: {:?}", envelope.message_type);
                         Ok(None)
                     }
                 }
@@ -166,5 +164,6 @@ impl ZmqConsumer {
             }
         }
     }
+
 }
 

dashboard/src/metrics/store.rs

@@ -1,4 +1,4 @@
-use cm_dashboard_shared::Metric;
+use cm_dashboard_shared::{AgentData, Metric};
 use std::collections::HashMap;
 use std::time::{Duration, Instant};
 use tracing::{debug, info, warn};
@@ -76,6 +76,286 @@ impl MetricStore {
         );
     }
 
+    /// Process structured agent data (temporary bridge - converts back to metrics)
+    /// TODO: Replace entire metric system with direct structured data processing
+    pub fn process_agent_data(&mut self, agent_data: AgentData) {
+        let metrics = self.convert_agent_data_to_metrics(&agent_data);
+        self.update_metrics(&agent_data.hostname, metrics);
+    }
+
+    /// Convert structured agent data to legacy metrics (temporary bridge)
+    fn convert_agent_data_to_metrics(&self, agent_data: &AgentData) -> Vec<Metric> {
+        use cm_dashboard_shared::{Metric, MetricValue, Status};
+        
+        let mut metrics = Vec::new();
+        
+        // Convert CPU data
+        metrics.push(Metric::new(
+            "cpu_load_1min".to_string(),
+            MetricValue::Float(agent_data.system.cpu.load_1min),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "cpu_load_5min".to_string(),
+            MetricValue::Float(agent_data.system.cpu.load_5min),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "cpu_load_15min".to_string(),
+            MetricValue::Float(agent_data.system.cpu.load_15min),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "cpu_frequency_mhz".to_string(),
+            MetricValue::Float(agent_data.system.cpu.frequency_mhz),
+            Status::Ok,
+        ));
+        if let Some(temp) = agent_data.system.cpu.temperature_celsius {
+            metrics.push(Metric::new(
+                "cpu_temperature_celsius".to_string(),
+                MetricValue::Float(temp),
+                Status::Ok,
+            ));
+        }
+        
+        // Convert Memory data  
+        metrics.push(Metric::new(
+            "memory_usage_percent".to_string(),
+            MetricValue::Float(agent_data.system.memory.usage_percent),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "memory_total_gb".to_string(),
+            MetricValue::Float(agent_data.system.memory.total_gb),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "memory_used_gb".to_string(),
+            MetricValue::Float(agent_data.system.memory.used_gb),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "memory_available_gb".to_string(),
+            MetricValue::Float(agent_data.system.memory.available_gb),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "memory_swap_total_gb".to_string(),
+            MetricValue::Float(agent_data.system.memory.swap_total_gb),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "memory_swap_used_gb".to_string(),
+            MetricValue::Float(agent_data.system.memory.swap_used_gb),
+            Status::Ok,
+        ));
+        
+        // Convert tmpfs data
+        for tmpfs in &agent_data.system.memory.tmpfs {
+            if tmpfs.mount == "/tmp" {
+                metrics.push(Metric::new(
+                    "memory_tmp_usage_percent".to_string(),
+                    MetricValue::Float(tmpfs.usage_percent),
+                    Status::Ok,
+                ));
+                metrics.push(Metric::new(
+                    "memory_tmp_used_gb".to_string(),
+                    MetricValue::Float(tmpfs.used_gb),
+                    Status::Ok,
+                ));
+                metrics.push(Metric::new(
+                    "memory_tmp_total_gb".to_string(),
+                    MetricValue::Float(tmpfs.total_gb),
+                    Status::Ok,
+                ));
+            }
+        }
+        
+        // Add agent metadata
+        metrics.push(Metric::new(
+            "agent_version".to_string(),
+            MetricValue::String(agent_data.agent_version.clone()),
+            Status::Ok,
+        ));
+        metrics.push(Metric::new(
+            "agent_heartbeat".to_string(),
+            MetricValue::Integer(agent_data.timestamp as i64),
+            Status::Ok,
+        ));
+        
+        // Convert storage data
+        for drive in &agent_data.system.storage.drives {
+            // Drive-level metrics
+            if let Some(temp) = drive.temperature_celsius {
+                metrics.push(Metric::new(
+                    format!("disk_{}_temperature", drive.name),
+                    MetricValue::Float(temp),
+                    Status::Ok,
+                ));
+            }
+            if let Some(wear) = drive.wear_percent {
+                metrics.push(Metric::new(
+                    format!("disk_{}_wear_percent", drive.name),
+                    MetricValue::Float(wear),
+                    Status::Ok,
+                ));
+            }
+            metrics.push(Metric::new(
+                format!("disk_{}_health", drive.name),
+                MetricValue::String(drive.health.clone()),
+                Status::Ok,
+            ));
+            
+            // Filesystem metrics
+            for fs in &drive.filesystems {
+                let fs_base = format!("disk_{}_fs_{}", drive.name, fs.mount.replace('/', "root"));
+                metrics.push(Metric::new(
+                    format!("{}_usage_percent", fs_base),
+                    MetricValue::Float(fs.usage_percent),
+                    Status::Ok,
+                ));
+                metrics.push(Metric::new(
+                    format!("{}_used_gb", fs_base),
+                    MetricValue::Float(fs.used_gb),
+                    Status::Ok,
+                ));
+                metrics.push(Metric::new(
+                    format!("{}_total_gb", fs_base),
+                    MetricValue::Float(fs.total_gb),
+                    Status::Ok,
+                ));
+            }
+        }
+        
+        // Convert storage pools
+        for pool in &agent_data.system.storage.pools {
+            let pool_base = format!("disk_{}", pool.name);
+            metrics.push(Metric::new(
+                format!("{}_usage_percent", pool_base),
+                MetricValue::Float(pool.usage_percent),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_used_gb", pool_base),
+                MetricValue::Float(pool.used_gb),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_total_gb", pool_base),
+                MetricValue::Float(pool.total_gb),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_pool_type", pool_base),
+                MetricValue::String(pool.pool_type.clone()),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_mount_point", pool_base),
+                MetricValue::String(pool.mount.clone()),
+                Status::Ok,
+            ));
+            
+            // Pool drive data
+            for drive in &pool.data_drives {
+                if let Some(temp) = drive.temperature_celsius {
+                    metrics.push(Metric::new(
+                        format!("disk_{}_{}_temperature", pool.name, drive.name),
+                        MetricValue::Float(temp),
+                        Status::Ok,
+                    ));
+                }
+                if let Some(wear) = drive.wear_percent {
+                    metrics.push(Metric::new(
+                        format!("disk_{}_{}_wear_percent", pool.name, drive.name),
+                        MetricValue::Float(wear),
+                        Status::Ok,
+                    ));
+                }
+            }
+            for drive in &pool.parity_drives {
+                if let Some(temp) = drive.temperature_celsius {
+                    metrics.push(Metric::new(
+                        format!("disk_{}_{}_temperature", pool.name, drive.name),
+                        MetricValue::Float(temp),
+                        Status::Ok,
+                    ));
+                }
+                if let Some(wear) = drive.wear_percent {
+                    metrics.push(Metric::new(
+                        format!("disk_{}_{}_wear_percent", pool.name, drive.name),
+                        MetricValue::Float(wear),
+                        Status::Ok,
+                    ));
+                }
+            }
+        }
+        
+        // Convert service data
+        for service in &agent_data.services {
+            let service_base = format!("service_{}", service.name);
+            metrics.push(Metric::new(
+                format!("{}_status", service_base),
+                MetricValue::String(service.status.clone()),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_memory_mb", service_base),
+                MetricValue::Float(service.memory_mb),
+                Status::Ok,
+            ));
+            metrics.push(Metric::new(
+                format!("{}_disk_gb", service_base),
+                MetricValue::Float(service.disk_gb),
+                Status::Ok,
+            ));
+            if service.user_stopped {
+                metrics.push(Metric::new(
+                    format!("{}_user_stopped", service_base),
+                    MetricValue::Boolean(true),
+                    Status::Ok,
+                ));
+            }
+        }
+        
+        // Convert backup data
+        metrics.push(Metric::new(
+            "backup_status".to_string(),
+            MetricValue::String(agent_data.backup.status.clone()),
+            Status::Ok,
+        ));
+        if let Some(last_run) = agent_data.backup.last_run {
+            metrics.push(Metric::new(
+                "backup_last_run_timestamp".to_string(),
+                MetricValue::Integer(last_run as i64),
+                Status::Ok,
+            ));
+        }
+        if let Some(next_scheduled) = agent_data.backup.next_scheduled {
+            metrics.push(Metric::new(
+                "backup_next_scheduled_timestamp".to_string(),
+                MetricValue::Integer(next_scheduled as i64),
+                Status::Ok,
+            ));
+        }
+        if let Some(size) = agent_data.backup.total_size_gb {
+            metrics.push(Metric::new(
+                "backup_size_gb".to_string(),
+                MetricValue::Float(size),
+                Status::Ok,
+            ));
+        }
+        if let Some(health) = &agent_data.backup.repository_health {
+            metrics.push(Metric::new(
+                "backup_repository_health".to_string(),
+                MetricValue::String(health.clone()),
+                Status::Ok,
+            ));
+        }
+        
+        metrics
+    }
+
     /// Get current metric for a specific host
     pub fn get_metric(&self, hostname: &str, metric_name: &str) -> Option<&Metric> {
         self.current_metrics.get(hostname)?.get(metric_name)

dashboard/src/ui/widgets/system.rs

@@ -380,16 +380,18 @@ impl SystemWidget {
                 }
             }
             
-            // Handle physical drive metrics: disk_{drive}_health and disk_{drive}_wear_percent
+            // Handle physical drive metrics: disk_{drive}_health, disk_{drive}_wear_percent, and disk_{drive}_temperature
             if (metric_name.ends_with("_health") && !metric_name.contains("_pool_health")) 
-                || metric_name.ends_with("_wear_percent") {
+                || metric_name.ends_with("_wear_percent")
+                || metric_name.ends_with("_temperature") {
                 // Count underscores to distinguish physical drive metrics (disk_{drive}_metric) 
                 // from pool drive metrics (disk_{pool}_{drive}_metric)
                 let underscore_count = metric_name.matches('_').count();
                 // disk_nvme0n1_wear_percent has 3 underscores: disk_nvme0n1_wear_percent
-                if underscore_count == 3 { // disk_{drive}_wear_percent (where drive has underscores)
+                if underscore_count == 3 { // disk_{drive}_metric (where drive has underscores)
                     if let Some(suffix_pos) = metric_name.rfind("_health")
-                        .or_else(|| metric_name.rfind("_wear_percent")) {
+                        .or_else(|| metric_name.rfind("_wear_percent"))
+                        .or_else(|| metric_name.rfind("_temperature")) {
                         return Some(metric_name[5..suffix_pos].to_string()); // Skip "disk_"
                     }
                 }
@@ -468,15 +470,25 @@ impl SystemWidget {
         for pool in &self.storage_pools {
             // Pool header line with type and health
             let pool_label = if pool.pool_type.starts_with("drive (") {
-                // For physical drives, show the drive name with wear percentage if available
-                // Look for any drive with wear data (physical drives may have drives named after the pool)
+                // For physical drives, show the drive name with temperature and wear percentage if available
+                // Look for any drive with temp/wear data (physical drives may have drives named after the pool)
+                let temp_opt = pool.drives.iter()
+                    .find_map(|d| d.temperature);
                 let wear_opt = pool.drives.iter()
                     .find_map(|d| d.wear_percent);
                 
+                let mut drive_info = Vec::new();
+                if let Some(temp) = temp_opt {
+                    drive_info.push(format!("T: {:.0}°C", temp));
+                }
                 if let Some(wear) = wear_opt {
-                    format!("{} W: {:.0}%:", pool.name, wear)
-                } else {
+                    drive_info.push(format!("W: {:.0}%", wear));
+                }
+                
+                if drive_info.is_empty() {
                     format!("{}:", pool.name)
+                } else {
+                    format!("{} {}:", pool.name, drive_info.join(" "))
                 }
             } else if pool.pool_type == "single" {
                 format!("{}:", pool.mount_point)

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.130"
+version = "0.1.131"
 edition = "2021"
 
 [dependencies]

shared/src/agent_data.rs

@@ -0,0 +1,161 @@
+use serde::{Deserialize, Serialize};
+
+/// Complete structured data from an agent
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AgentData {
+    pub hostname: String,
+    pub agent_version: String,
+    pub timestamp: u64,
+    pub system: SystemData,
+    pub services: Vec<ServiceData>,
+    pub backup: BackupData,
+}
+
+/// System-level monitoring data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SystemData {
+    pub cpu: CpuData,
+    pub memory: MemoryData,
+    pub storage: StorageData,
+}
+
+/// CPU monitoring data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct CpuData {
+    pub load_1min: f32,
+    pub load_5min: f32,
+    pub load_15min: f32,
+    pub frequency_mhz: f32,
+    pub temperature_celsius: Option<f32>,
+}
+
+/// Memory monitoring data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct MemoryData {
+    pub usage_percent: f32,
+    pub total_gb: f32,
+    pub used_gb: f32,
+    pub available_gb: f32,
+    pub swap_total_gb: f32,
+    pub swap_used_gb: f32,
+    pub tmpfs: Vec<TmpfsData>,
+}
+
+/// Tmpfs filesystem data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TmpfsData {
+    pub mount: String,
+    pub usage_percent: f32,
+    pub used_gb: f32,
+    pub total_gb: f32,
+}
+
+/// Storage monitoring data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct StorageData {
+    pub drives: Vec<DriveData>,
+    pub pools: Vec<PoolData>,
+}
+
+/// Individual drive data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct DriveData {
+    pub name: String,
+    pub health: String,
+    pub temperature_celsius: Option<f32>,
+    pub wear_percent: Option<f32>,
+    pub filesystems: Vec<FilesystemData>,
+}
+
+/// Filesystem on a drive
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FilesystemData {
+    pub mount: String,
+    pub usage_percent: f32,
+    pub used_gb: f32,
+    pub total_gb: f32,
+}
+
+/// Storage pool (MergerFS, RAID, etc.)
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PoolData {
+    pub name: String,
+    pub mount: String,
+    pub pool_type: String, // "mergerfs", "raid", etc.
+    pub health: String,
+    pub usage_percent: f32,
+    pub used_gb: f32,
+    pub total_gb: f32,
+    pub data_drives: Vec<PoolDriveData>,
+    pub parity_drives: Vec<PoolDriveData>,
+}
+
+/// Drive in a storage pool
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct PoolDriveData {
+    pub name: String,
+    pub temperature_celsius: Option<f32>,
+    pub wear_percent: Option<f32>,
+    pub health: String,
+}
+
+/// Service monitoring data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ServiceData {
+    pub name: String,
+    pub status: String, // "active", "inactive", "failed"
+    pub memory_mb: f32,
+    pub disk_gb: f32,
+    pub user_stopped: bool,
+}
+
+/// Backup system data
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BackupData {
+    pub status: String,
+    pub last_run: Option<u64>,
+    pub next_scheduled: Option<u64>,
+    pub total_size_gb: Option<f32>,
+    pub repository_health: Option<String>,
+}
+
+impl AgentData {
+    /// Create new agent data with current timestamp
+    pub fn new(hostname: String, agent_version: String) -> Self {
+        Self {
+            hostname,
+            agent_version,
+            timestamp: chrono::Utc::now().timestamp() as u64,
+            system: SystemData {
+                cpu: CpuData {
+                    load_1min: 0.0,
+                    load_5min: 0.0,
+                    load_15min: 0.0,
+                    frequency_mhz: 0.0,
+                    temperature_celsius: None,
+                },
+                memory: MemoryData {
+                    usage_percent: 0.0,
+                    total_gb: 0.0,
+                    used_gb: 0.0,
+                    available_gb: 0.0,
+                    swap_total_gb: 0.0,
+                    swap_used_gb: 0.0,
+                    tmpfs: Vec::new(),
+                },
+                storage: StorageData {
+                    drives: Vec::new(),
+                    pools: Vec::new(),
+                },
+            },
+            services: Vec::new(),
+            backup: BackupData {
+                status: "unknown".to_string(),
+                last_run: None,
+                next_scheduled: None,
+                total_size_gb: None,
+                repository_health: None,
+            },
+        }
+    }
+}

shared/src/lib.rs

@@ -1,8 +1,10 @@
+pub mod agent_data;
 pub mod cache;
 pub mod error;
 pub mod metrics;
 pub mod protocol;
 
+pub use agent_data::*;
 pub use cache::*;
 pub use error::*;
 pub use metrics::*;

shared/src/protocol.rs

@@ -1,13 +1,9 @@
-use crate::metrics::Metric;
+use crate::agent_data::AgentData;
 use serde::{Deserialize, Serialize};
 
-/// Message sent from agent to dashboard via ZMQ
-#[derive(Debug, Clone, Serialize, Deserialize)]
-pub struct MetricMessage {
-    pub hostname: String,
-    pub timestamp: u64,
-    pub metrics: Vec<Metric>,
-}
+/// Message sent from agent to dashboard via ZMQ  
+/// Always structured data - no legacy metrics support
+pub type AgentMessage = AgentData;
 
 /// Command output streaming message
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -20,15 +16,6 @@ pub struct CommandOutputMessage {
     pub timestamp: u64,
 }
 
-impl MetricMessage {
-    pub fn new(hostname: String, metrics: Vec<Metric>) -> Self {
-        Self {
-            hostname,
-            timestamp: chrono::Utc::now().timestamp() as u64,
-            metrics,
-        }
-    }
-}
 
 impl CommandOutputMessage {
     pub fn new(hostname: String, command_id: String, command_type: String, output_line: String, is_complete: bool) -> Self {
@@ -59,8 +46,8 @@ pub enum Command {
 pub enum CommandResponse {
     /// Acknowledgment of command
     Ack,
-    /// Metrics response
-    Metrics(Vec<Metric>),
+    /// Agent data response
+    AgentData(AgentData),
     /// Pong response to ping
     Pong,
     /// Error response
@@ -76,7 +63,7 @@ pub struct MessageEnvelope {
 
 #[derive(Debug, Serialize, Deserialize)]
 pub enum MessageType {
-    Metrics,
+    AgentData,
     Command,
     CommandResponse,
     CommandOutput,
@@ -84,10 +71,10 @@ pub enum MessageType {
 }
 
 impl MessageEnvelope {
-    pub fn metrics(message: MetricMessage) -> Result<Self, crate::SharedError> {
+    pub fn agent_data(data: AgentData) -> Result<Self, crate::SharedError> {
         Ok(Self {
-            message_type: MessageType::Metrics,
-            payload: serde_json::to_vec(&message)?,
+            message_type: MessageType::AgentData,
+            payload: serde_json::to_vec(&data)?,
         })
     }
 
@@ -119,11 +106,11 @@ impl MessageEnvelope {
         })
     }
 
-    pub fn decode_metrics(&self) -> Result<MetricMessage, crate::SharedError> {
+    pub fn decode_agent_data(&self) -> Result<AgentData, crate::SharedError> {
         match self.message_type {
-            MessageType::Metrics => Ok(serde_json::from_slice(&self.payload)?),
+            MessageType::AgentData => Ok(serde_json::from_slice(&self.payload)?),
             _ => Err(crate::SharedError::Protocol {
-                message: "Expected metrics message".to_string(),
+                message: "Expected agent data message".to_string(),
             }),
         }
     }