feat: integrate NatsBridge with real JetStream into A2A server

vapora-agents:
  - Add nats_bridge.rs with real async_nats JetStream (submit_task, durable
    pull consumer, list_agents from live registry)
  - Replace swarm_adapter.rs stubs with real SwarmCoordinator calls
    (select_agent via bidding, report_completion with load update, agent_load
    from fractional profile)
  - Expose SwarmCoordinator::get_agent() for per-agent profile access

  vapora-a2a:
  - CoordinatorBridge: replace raw NatsClient with NatsBridge (JetStream
    at-least-once delivery via durable pull consumer)
  - Add GET /a2a/agents endpoint listing registered agents
  - task_manager::create(): switch .content() to parameterized INSERT INTO
    to avoid SurrealDB serializer failing on adjacently-tagged enums
  - task_manager::get(): explicit field projection, exclude id (Thing),
    cast datetimes with type::string() to fix serde_json::Value deserialization
  - Integration tests: 4/5 pass with SurrealDB + NATS

  vapora-leptos-ui:
  - Set doctest = false in [lib]: Leptos components require WASM reactive
    runtime, incompatible with native cargo test --doc

CHANGELOG.md

@@ -7,6 +7,48 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added - NatsBridge + A2A JetStream Integration
+
+#### `vapora-agents` — NatsBridge (real JetStream)
+
+- `nats_bridge.rs`: new `NatsBridge` with real `async_nats::jetstream::Context`
+  - `submit_task()` → JetStream publish with double-await ack, returns sequence number
+  - `subscribe_task_results()` → durable pull consumer (`WorkQueue` retention), returns `mpsc::Receiver<TaskResult>`
+  - `list_agents()` → reads from live `AgentRegistry`, never hardcoded
+  - `NatsBrokerConfig` with sensible defaults; stream auto-created via `get_or_create_stream`
+- `swarm_adapter.rs`: replaced all 3 stubs with real logic
+  - `select_agent()` → `swarm.submit_task_for_bidding()` for load-balanced selection
+  - `report_completion()` → `swarm.update_agent_status()` with load adjustment on failure
+  - `agent_load()` → derives current tasks from fractional load via `swarm.get_agent()`
+
+#### `vapora-swarm` — `SwarmCoordinator::get_agent()`
+
+- Added `pub fn get_agent(&self, agent_id: &str) -> Option<AgentProfile>` to expose per-agent profiles from private `DashMap`
+
+#### `vapora-a2a` — NatsBridge integration + SurrealDB serialization fixes
+
+- `CoordinatorBridge`: replaced raw `NatsClient` with `Option<Arc<NatsBridge>>`
+  - `start_result_listener()` uses JetStream pull consumer (at-least-once delivery)
+  - `dispatch()` publishes to JetStream after coordinator assignment (non-fatal fallback)
+  - `list_agents()` delegates to `NatsBridge.list_agents()`
+- `server.rs`: added `GET /a2a/agents` endpoint
+- `task_manager.rs`: fixed SurrealDB serialization
+  - `create()`: switched from `.content()` to parameterized `INSERT INTO` query; avoids SurrealDB serializer failing on adjacently-tagged enums (`A2aMessagePart`)
+  - `get()`: changed `SELECT *` to explicit field projection; excludes `id` (SurrealDB `Thing`) and casts datetimes with `type::string()` to avoid `serde_json::Value` deserialization failures
+- Integration tests verified: 4/5 pass with SurrealDB + NATS; 5th requires live agent
+
+#### `vapora-leptos-ui`
+
+- Set `doctest = false` in `[lib]`: Leptos components require WASM reactive runtime; native doctests are incompatible by design
+
+### Added - NATS JetStream local container
+
+- `/containers/nats/`: Docker Compose service following existing containers pattern
+  - JetStream enabled via `nats.conf` (`store_dir: /data`, max_mem: 1G, max_file: 10G)
+  - Persistent volume at `./nats_data`
+  - Ports: 4222 (client), 8222 (HTTP monitoring)
+  - `local_net` network, `restart: unless-stopped`
+
 ### Added - Recursive Language Models (RLM) Integration (v1.3.0)
 
 #### Core RLM Engine (`vapora-rlm` crate - 17,000+ LOC)
@@ -108,7 +150,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 #### Documentation
 
-- **Architecture Decision Record**: `docs/architecture/decisions/008-recursive-language-models-integration.md`
+- **Architecture Decision Record**: `docs/adrs/0029-rlm-recursive-language-models.md`
   - Context and problem statement
   - Considered options (RAG, LangChain, custom RLM)
   - Decision rationale and trade-offs

crates/vapora-a2a/README.md

@@ -34,8 +34,8 @@
 ### Components
 
 1. **CoordinatorBridge** - Maps A2A tasks to internal agent coordination
-   - NATS subscribers for TaskCompleted/TaskFailed events
-   - DashMap for async result delivery via oneshot channels
+   - JetStream durable pull consumer via `NatsBridge` (at-least-once delivery)
+   - `DashMap<String, oneshot::Sender>` for async result delivery
    - Graceful degradation if NATS unavailable
 
 2. **TaskManager** - Persistent task storage and lifecycle
@@ -47,6 +47,7 @@
    - `GET /.well-known/agent.json` - Agent discovery
    - `POST /a2a` - Task dispatch
    - `GET /a2a/tasks/{task_id}` - Status query
+   - `GET /a2a/agents` - List registered agents
    - `GET /health` - Health check
    - `GET /metrics` - Prometheus metrics
 
@@ -60,8 +61,9 @@ docker run -d -p 8000:8000 \
   surrealdb/surrealdb:latest \
   start --bind 0.0.0.0:8000
 
-# Start NATS (optional, graceful degradation)
-docker run -d -p 4222:4222 nats:latest
+# Start NATS with JetStream (optional, graceful degradation)
+docker run -d -p 4222:4222 -p 8222:8222 nats:latest -js
+# or use the local container: cd /containers/nats && docker compose up -d
 
 # Run migration
 surrealdb import --conn ws://localhost:8000 \
@@ -174,7 +176,7 @@ Require SurrealDB + NATS running:
 docker compose up -d surrealdb nats
 
 # Run tests
-cargo test -p vapora-a2a --test integration_test -- --ignored
+cargo test -p vapora-a2a --test integration_test -- --include-ignored
 
 # Tests:
 # 1. Task persistence after restart
@@ -198,7 +200,7 @@ Implements [A2A Protocol Specification](https://a2a-spec.dev):
 
 ## Production Deployment
 
-See [ADR-0001](../../docs/architecture/adr/0001-a2a-protocol-implementation.md) and [ADR-0002](../../docs/architecture/adr/0002-kubernetes-deployment-strategy.md).
+See [ADR-0030](../../docs/adrs/0030-a2a-protocol-implementation.md) and [ADR-0031](../../docs/adrs/0031-kubernetes-deployment-kagent.md).
 
 ### Kubernetes
 

crates/vapora-a2a/src/bridge.rs

@@ -1,17 +1,17 @@
 use std::sync::Arc;
 
-use async_nats::Client as NatsClient;
 use dashmap::DashMap;
-use futures::StreamExt;
-use serde_json::json;
-use tokio::sync::oneshot;
+use tokio::sync::{mpsc, oneshot};
 use tracing::{error, info, warn};
-use vapora_agents::{coordinator::AgentCoordinator, messages::AgentMessage};
+use vapora_agents::{
+    coordinator::AgentCoordinator,
+    nats_bridge::{AgentStatusInfo, NatsBridge, TaskMessage, TaskResult},
+};
 
 use crate::{
     error::{A2aError, Result},
     metrics::{A2A_COORDINATOR_ASSIGNMENTS, A2A_NATS_MESSAGES, A2A_TASKS_TOTAL},
-    protocol::{A2aMessage, A2aMessagePart, A2aTask, A2aTaskResult, TaskState},
+    protocol::{A2aErrorObj, A2aMessage, A2aMessagePart, A2aTask, A2aTaskResult, TaskState},
     task_manager::TaskManager,
 };
 
@@ -19,228 +19,49 @@ pub struct CoordinatorBridge {
     coordinator: Arc<AgentCoordinator>,
     task_manager: Arc<TaskManager>,
     result_channels: Arc<DashMap<String, oneshot::Sender<A2aTaskResult>>>,
-    nats_client: Option<NatsClient>,
+    nats_bridge: Option<Arc<NatsBridge>>,
 }
 
 impl CoordinatorBridge {
     pub fn new(
         coordinator: Arc<AgentCoordinator>,
         task_manager: Arc<TaskManager>,
-        nats_client: Option<NatsClient>,
+        nats_bridge: Option<Arc<NatsBridge>>,
     ) -> Self {
         Self {
             coordinator,
             task_manager,
             result_channels: Arc::new(DashMap::new()),
-            nats_client,
+            nats_bridge,
         }
     }
 
-    /// Start background NATS listeners for task completion/failure events
+    /// Start the JetStream result consumer.
+    ///
+    /// Subscribes to `vapora.tasks.completed` via the durable pull consumer in
+    /// `NatsBridge`. Each `TaskResult` received is persisted to SurrealDB and
+    /// forwarded to any waiting oneshot channel. Replaces the previous core
+    /// NATS subscriber approach with at-least-once JetStream delivery.
     pub async fn start_result_listener(&self) -> Result<()> {
-        let Some(nats) = &self.nats_client else {
-            warn!("NATS client not configured, result listener disabled");
+        let Some(bridge) = &self.nats_bridge else {
+            warn!("NatsBridge not configured; result listener disabled");
             return Ok(());
         };
 
-        // Subscribe to completion events
-        let completed_sub = nats
-            .subscribe("vapora.tasks.completed")
+        let rx = bridge
+            .subscribe_task_results()
             .await
-            .map_err(|e| A2aError::InternalError(format!("Failed to subscribe to NATS: {}", e)))?;
+            .map_err(|e| A2aError::InternalError(format!("JetStream consumer error: {}", e)))?;
 
-        let failed_sub = nats
-            .subscribe("vapora.tasks.failed")
-            .await
-            .map_err(|e| A2aError::InternalError(format!("Failed to subscribe to NATS: {}", e)))?;
+        let task_manager = self.task_manager.clone();
+        let result_channels = self.result_channels.clone();
 
-        // Spawn listener for completed tasks
-        Self::spawn_completed_listener(
-            completed_sub,
-            self.task_manager.clone(),
-            self.result_channels.clone(),
-        );
+        tokio::spawn(run_result_consumer(rx, task_manager, result_channels));
 
-        // Spawn listener for failed tasks
-        Self::spawn_failed_listener(
-            failed_sub,
-            self.task_manager.clone(),
-            self.result_channels.clone(),
-        );
-
-        info!(
-            "A2A result listener started (subscribed to vapora.tasks.completed, \
-             vapora.tasks.failed)"
-        );
+        info!("A2A result listener started (JetStream pull consumer)");
         Ok(())
     }
 
-    fn spawn_completed_listener(
-        mut completed_sub: async_nats::Subscriber,
-        task_manager: Arc<TaskManager>,
-        result_channels: Arc<DashMap<String, oneshot::Sender<A2aTaskResult>>>,
-    ) {
-        tokio::spawn(async move {
-            while let Some(msg) = completed_sub.next().await {
-                Self::handle_completed_message(msg, &task_manager, &result_channels).await;
-            }
-        });
-    }
-
-    async fn handle_completed_message(
-        msg: async_nats::Message,
-        task_manager: &TaskManager,
-        result_channels: &DashMap<String, oneshot::Sender<A2aTaskResult>>,
-    ) {
-        match serde_json::from_slice::<AgentMessage>(&msg.payload) {
-            Ok(AgentMessage::TaskCompleted(task_completed)) => {
-                let task_id = task_completed.task_id.clone();
-
-                // Build A2aTaskResult
-                let artifacts = Self::convert_artifacts(&task_completed.artifacts);
-                let result = A2aTaskResult {
-                    message: A2aMessage {
-                        role: "assistant".to_string(),
-                        parts: vec![A2aMessagePart::Text(task_completed.result.clone())],
-                    },
-                    artifacts,
-                };
-
-                // Update DB
-                if let Err(e) = task_manager.complete(&task_id, result.clone()).await {
-                    error!(
-                        error = %e,
-                        task_id = %task_id,
-                        "Failed to mark task as completed in DB"
-                    );
-                    A2A_NATS_MESSAGES
-                        .with_label_values(&["completed", "db_error"])
-                        .inc();
-                } else {
-                    A2A_NATS_MESSAGES
-                        .with_label_values(&["completed", "success"])
-                        .inc();
-                    A2A_TASKS_TOTAL.with_label_values(&["completed"]).inc();
-                }
-
-                // Send to waiting channel if exists
-                Self::send_to_channel(&task_id, result, result_channels);
-            }
-            Ok(_) => {
-                warn!("Received non-TaskCompleted message on vapora.tasks.completed");
-                A2A_NATS_MESSAGES
-                    .with_label_values(&["completed", "wrong_type"])
-                    .inc();
-            }
-            Err(e) => {
-                warn!(error = %e, "Failed to deserialize TaskCompleted message");
-                A2A_NATS_MESSAGES
-                    .with_label_values(&["completed", "deserialize_error"])
-                    .inc();
-            }
-        }
-    }
-
-    fn spawn_failed_listener(
-        mut failed_sub: async_nats::Subscriber,
-        task_manager: Arc<TaskManager>,
-        result_channels: Arc<DashMap<String, oneshot::Sender<A2aTaskResult>>>,
-    ) {
-        tokio::spawn(async move {
-            while let Some(msg) = failed_sub.next().await {
-                Self::handle_failed_message(msg, &task_manager, &result_channels).await;
-            }
-        });
-    }
-
-    async fn handle_failed_message(
-        msg: async_nats::Message,
-        task_manager: &TaskManager,
-        result_channels: &DashMap<String, oneshot::Sender<A2aTaskResult>>,
-    ) {
-        match serde_json::from_slice::<AgentMessage>(&msg.payload) {
-            Ok(AgentMessage::TaskFailed(task_failed)) => {
-                let task_id = task_failed.task_id.clone();
-
-                // Update DB with error
-                let error_obj = crate::protocol::A2aErrorObj {
-                    code: -1,
-                    message: task_failed.error.clone(),
-                };
-
-                if let Err(e) = task_manager.fail(&task_id, error_obj).await {
-                    error!(
-                        error = %e,
-                        task_id = %task_id,
-                        "Failed to mark task as failed in DB"
-                    );
-                    A2A_NATS_MESSAGES
-                        .with_label_values(&["failed", "db_error"])
-                        .inc();
-                } else {
-                    A2A_NATS_MESSAGES
-                        .with_label_values(&["failed", "success"])
-                        .inc();
-                    A2A_TASKS_TOTAL.with_label_values(&["failed"]).inc();
-                }
-
-                // Remove waiting channel (task failed, no result to send)
-                result_channels.remove(&task_id);
-            }
-            Ok(_) => {
-                warn!("Received non-TaskFailed message on vapora.tasks.failed");
-                A2A_NATS_MESSAGES
-                    .with_label_values(&["failed", "wrong_type"])
-                    .inc();
-            }
-            Err(e) => {
-                warn!(error = %e, "Failed to deserialize TaskFailed message");
-                A2A_NATS_MESSAGES
-                    .with_label_values(&["failed", "deserialize_error"])
-                    .inc();
-            }
-        }
-    }
-
-    fn convert_artifacts(artifacts: &[String]) -> Option<Vec<crate::protocol::A2aArtifact>> {
-        if artifacts.is_empty() {
-            return None;
-        }
-
-        Some(
-            artifacts
-                .iter()
-                .map(|path| crate::protocol::A2aArtifact {
-                    artifact_type: "file".to_string(),
-                    format: None,
-                    title: Some(
-                        std::path::Path::new(path)
-                            .file_name()
-                            .and_then(|n| n.to_str())
-                            .unwrap_or(path)
-                            .to_string(),
-                    ),
-                    data: json!({ "path": path }),
-                })
-                .collect(),
-        )
-    }
-
-    fn send_to_channel(
-        task_id: &str,
-        result: A2aTaskResult,
-        result_channels: &DashMap<String, oneshot::Sender<A2aTaskResult>>,
-    ) {
-        if let Some((_, sender)) = result_channels.remove(task_id) {
-            if sender.send(result).is_err() {
-                warn!(
-                    task_id = %task_id,
-                    "Failed to send result to channel (receiver dropped)"
-                );
-            }
-        }
-    }
-
     pub async fn dispatch(&self, a2a_task: A2aTask) -> Result<String> {
         let task_id = a2a_task.id.clone();
 
@@ -272,27 +93,32 @@ impl CoordinatorBridge {
         let title = parts[0].to_string();
         let description = parts.get(1).unwrap_or(&"").to_string();
 
-        // Create task in DB (status: waiting)
-        self.task_manager.create(a2a_task).await?;
+        // Persist task (status: waiting)
+        self.task_manager.create(a2a_task.clone()).await?;
         A2A_TASKS_TOTAL.with_label_values(&["waiting"]).inc();
 
-        // Update status to working
         self.task_manager
             .update_state(&task_id, TaskState::Working)
             .await?;
         A2A_TASKS_TOTAL.with_label_values(&["working"]).inc();
 
-        // Assign to agent (via AgentCoordinator)
+        // Assign via AgentCoordinator (learning-based selection + core NATS publish)
         match self
             .coordinator
-            .assign_task(&skill, title, description, json!({}).to_string(), 50)
+            .assign_task(
+                &skill,
+                title.clone(),
+                description.clone(),
+                serde_json::json!({}).to_string(),
+                50,
+            )
             .await
         {
             Ok(_) => {
                 A2A_COORDINATOR_ASSIGNMENTS
                     .with_label_values(&[skill.as_str(), "success"])
                     .inc();
-                info!("Task {} dispatched to coordinator", task_id);
+                info!(task_id = %task_id, "Task dispatched via coordinator");
             }
             Err(e) => {
                 A2A_COORDINATOR_ASSIGNMENTS
@@ -302,7 +128,36 @@ impl CoordinatorBridge {
             }
         }
 
-        // NO sleep(5) here! Result will come via NATS subscriber
+        // Publish to JetStream for durable delivery (if NatsBridge is configured)
+        if let Some(bridge) = &self.nats_bridge {
+            let task_msg = TaskMessage {
+                task_id: task_id.clone(),
+                title,
+                description,
+                role: skill.clone(),
+                context: serde_json::json!({}).to_string(),
+                priority: 50,
+            };
+
+            match bridge.submit_task(task_msg).await {
+                Ok(seq) => {
+                    info!(
+                        task_id = %task_id,
+                        jetstream_seq = seq,
+                        "Task published to JetStream"
+                    );
+                }
+                Err(e) => {
+                    // Non-fatal: core NATS dispatch already succeeded.
+                    // Log and continue — coordinator assignment was the primary path.
+                    warn!(
+                        error = %e,
+                        task_id = %task_id,
+                        "JetStream publish failed (task still dispatched via coordinator)"
+                    );
+                }
+            }
+        }
 
         Ok(task_id)
     }
@@ -310,4 +165,78 @@ impl CoordinatorBridge {
     pub async fn get_task(&self, id: &str) -> Result<crate::protocol::A2aTaskStatus> {
         self.task_manager.get(id).await
     }
+
+    /// List all registered agents from the NatsBridge registry.
+    /// Returns empty vec if NatsBridge is not configured.
+    pub fn list_agents(&self) -> Vec<AgentStatusInfo> {
+        self.nats_bridge
+            .as_ref()
+            .map(|b| b.list_agents())
+            .unwrap_or_default()
+    }
+}
+
+async fn run_result_consumer(
+    mut rx: mpsc::Receiver<TaskResult>,
+    task_manager: Arc<TaskManager>,
+    result_channels: Arc<DashMap<String, oneshot::Sender<A2aTaskResult>>>,
+) {
+    while let Some(task_result) = rx.recv().await {
+        let task_id = task_result.task_id.clone();
+
+        if task_result.success {
+            let a2a_result = A2aTaskResult {
+                message: A2aMessage {
+                    role: "assistant".to_string(),
+                    parts: vec![A2aMessagePart::Text(task_result.result.clone())],
+                },
+                artifacts: None,
+            };
+
+            match task_manager.complete(&task_id, a2a_result.clone()).await {
+                Err(e) => {
+                    error!(error = %e, task_id = %task_id, "Failed to mark task completed");
+                    A2A_NATS_MESSAGES
+                        .with_label_values(&["completed", "db_error"])
+                        .inc();
+                }
+                Ok(()) => {
+                    A2A_NATS_MESSAGES
+                        .with_label_values(&["completed", "success"])
+                        .inc();
+                    A2A_TASKS_TOTAL.with_label_values(&["completed"]).inc();
+                }
+            }
+
+            if let Some((_, sender)) = result_channels.remove(&task_id) {
+                if sender.send(a2a_result).is_err() {
+                    warn!(task_id = %task_id, "Result receiver dropped");
+                }
+            }
+        } else {
+            let error_obj = A2aErrorObj {
+                code: -1,
+                message: task_result.result.clone(),
+            };
+
+            match task_manager.fail(&task_id, error_obj).await {
+                Err(e) => {
+                    error!(error = %e, task_id = %task_id, "Failed to mark task failed");
+                    A2A_NATS_MESSAGES
+                        .with_label_values(&["failed", "db_error"])
+                        .inc();
+                }
+                Ok(()) => {
+                    A2A_NATS_MESSAGES
+                        .with_label_values(&["failed", "success"])
+                        .inc();
+                    A2A_TASKS_TOTAL.with_label_values(&["failed"]).inc();
+                }
+            }
+
+            result_channels.remove(&task_id);
+        }
+    }
+
+    warn!("NatsBridge result channel closed; listener stopped");
 }

crates/vapora-a2a/src/main.rs

@@ -6,7 +6,12 @@ use vapora_a2a::{
     agent_card::generate_default_agent_card, bridge::CoordinatorBridge, server::create_router,
     server::A2aState, task_manager::TaskManager,
 };
-use vapora_agents::{config::AgentConfig, coordinator::AgentCoordinator, registry::AgentRegistry};
+use vapora_agents::{
+    config::AgentConfig,
+    coordinator::AgentCoordinator,
+    nats_bridge::{NatsBridge, NatsBrokerConfig},
+    registry::AgentRegistry,
+};
 
 #[tokio::main]
 async fn main() -> Result<(), Box<dyn std::error::Error>> {
@@ -37,13 +42,18 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
         .map(|(_, v)| v.as_str())
         .unwrap_or("1.0.0");
 
+    let nats_url =
+        std::env::var("NATS_URL").unwrap_or_else(|_| "nats://127.0.0.1:4222".to_string());
+    let surreal_url = std::env::var("SURREAL_URL").unwrap_or_else(|_| "127.0.0.1:8000".to_string());
+
     let addr = format!("{}:{}", host, port);
 
     info!("Starting VAPORA A2A Server on {}", addr);
 
     // Connect to SurrealDB
-    info!("Connecting to SurrealDB");
-    let db = surrealdb::Surreal::new::<surrealdb::engine::remote::ws::Ws>("127.0.0.1:8000").await?;
+    info!(url = %surreal_url, "Connecting to SurrealDB");
+    let db =
+        surrealdb::Surreal::new::<surrealdb::engine::remote::ws::Ws>(surreal_url.as_str()).await?;
 
     db.signin(surrealdb::opt::auth::Root {
         username: "root",
@@ -54,32 +64,40 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
     db.use_ns("vapora").use_db("main").await?;
     info!("Connected to SurrealDB");
 
-    // Connect to NATS (optional - graceful fallback if not available)
-    let nats_client = match async_nats::connect("127.0.0.1:4222").await {
-        Ok(client) => {
-            info!("Connected to NATS");
-            Some(client)
+    let registry = Arc::new(AgentRegistry::new(10));
+
+    // Connect to NATS via NatsBridge (JetStream, durable) — graceful fallback
+    let nats_bridge = {
+        let config = NatsBrokerConfig {
+            url: nats_url.clone(),
+            ..NatsBrokerConfig::default()
+        };
+        match NatsBridge::connect(config, registry.clone()).await {
+            Ok(bridge) => {
+                info!(url = %nats_url, "NatsBridge connected (JetStream)");
+                Some(Arc::new(bridge))
             }
             Err(e) => {
                 warn!(
-                "Failed to connect to NATS: {}. Async coordination disabled.",
-                e
+                    error = %e,
+                    "Failed to connect NatsBridge; result listener and JetStream dispatch disabled"
                 );
                 None
             }
+        }
     };
 
     let task_manager = Arc::new(TaskManager::new(db.clone()));
-    let registry = Arc::new(AgentRegistry::new(10));
     let config = AgentConfig::default();
     let agent_coordinator = Arc::new(AgentCoordinator::new(config, registry).await?);
+
     let bridge = Arc::new(CoordinatorBridge::new(
         agent_coordinator.clone(),
         task_manager.clone(),
-        nats_client,
+        nats_bridge,
     ));
 
-    // Start NATS result listener
+    // Start JetStream result listener
     bridge.start_result_listener().await?;
 
     let agent_card =

crates/vapora-a2a/src/server.rs

@@ -29,6 +29,7 @@ pub fn create_router(state: A2aState) -> Router {
         .route("/.well-known/agent.json", get(agent_card_handler))
         .route("/a2a", post(a2a_handler))
         .route("/a2a/tasks/{task_id}", get(task_status_handler))
+        .route("/a2a/agents", get(agents_handler))
         .route("/health", get(health_handler))
         .route("/metrics", get(metrics_handler))
         .with_state(state)
@@ -84,6 +85,10 @@ async fn task_status_handler(
     }
 }
 
+async fn agents_handler(State(state): State<A2aState>) -> impl IntoResponse {
+    Json(state.bridge.list_agents())
+}
+
 async fn health_handler() -> impl IntoResponse {
     Json(json!({
         "status": "healthy",

crates/vapora-a2a/src/task_manager.rs

@@ -17,39 +17,42 @@ impl TaskManager {
 
     pub async fn create(&self, task: A2aTask) -> Result<A2aTaskStatus> {
         let now = Utc::now().to_rfc3339();
-        let status = A2aTaskStatus {
-            id: task.id.clone(),
-            state: TaskState::Waiting.as_str().to_string(),
-            message: Some(task.message.clone()),
-            result: None,
-            error: None,
-            created_at: now.clone(),
-            updated_at: now.clone(),
-        };
 
-        // Serialize task to JSON for storage
-        let task_record = serde_json::json!({
-            "task_id": task.id,
-            "state": TaskState::Waiting.as_str(),
-            "message": task.message,
-            "result": serde_json::Value::Null,
-            "error": serde_json::Value::Null,
-            "metadata": task.metadata,
-            "created_at": now,
-            "updated_at": now,
-        });
+        // Pre-serialize complex fields with serde_json to avoid SurrealDB's
+        // own serializer choking on adjacently-tagged enums (tag + content).
+        let message_json = serde_json::to_value(&task.message)
+            .map_err(|e| A2aError::InternalError(format!("Failed to serialize message: {}", e)))?;
+        let metadata_json = serde_json::to_value(&task.metadata)
+            .map_err(|e| A2aError::InternalError(format!("Failed to serialize metadata: {}", e)))?;
 
         match self
             .db
-            .create::<Option<serde_json::Value>>("a2a_tasks")
-            .content(task_record)
+            .query(
+                "INSERT INTO a2a_tasks (task_id, state, message, result, error, metadata, \
+                 created_at, updated_at) VALUES ($task_id, $state, $message, NONE, NONE, \
+                 $metadata, $created_at, $updated_at)",
+            )
+            .bind(("task_id", task.id.clone()))
+            .bind(("state", TaskState::Waiting.as_str().to_string()))
+            .bind(("message", message_json))
+            .bind(("metadata", metadata_json))
+            .bind(("created_at", now.clone()))
+            .bind(("updated_at", now.clone()))
             .await
         {
             Ok(_) => {
                 A2A_DB_OPERATIONS
                     .with_label_values(&["create", "success"])
                     .inc();
-                Ok(status)
+                Ok(A2aTaskStatus {
+                    id: task.id,
+                    state: TaskState::Waiting.as_str().to_string(),
+                    message: Some(task.message),
+                    result: None,
+                    error: None,
+                    created_at: now.clone(),
+                    updated_at: now,
+                })
             }
             Err(e) => {
                 A2A_DB_OPERATIONS
@@ -64,9 +67,15 @@ impl TaskManager {
     }
 
     pub async fn get(&self, id: &str) -> Result<A2aTaskStatus> {
+        // Explicit projection: exclude `id` (SurrealDB Thing) and cast datetime
+        // fields to strings to avoid deserialization failures into serde_json::Value.
         let mut response = match self
             .db
-            .query("SELECT * FROM a2a_tasks WHERE task_id = $task_id LIMIT 1")
+            .query(
+                "SELECT task_id, state, message, result, error, metadata, \
+                 type::string(created_at) AS created_at, type::string(updated_at) AS updated_at \
+                 FROM a2a_tasks WHERE task_id = $task_id LIMIT 1",
+            )
             .bind(("task_id", id.to_string()))
             .await
         {

crates/vapora-a2a/tests/integration_test.rs

@@ -13,11 +13,12 @@ use vapora_a2a::{
     task_manager::TaskManager,
 };
 use vapora_agents::{
-    config::AgentConfig, coordinator::AgentCoordinator, messages::AgentMessage,
-    messages::TaskCompleted, registry::AgentRegistry,
+    config::AgentConfig,
+    coordinator::AgentCoordinator,
+    nats_bridge::{NatsBridge, NatsBrokerConfig, TaskResult},
+    registry::AgentRegistry,
 };
 
-/// Setup test database connection
 async fn setup_test_db() -> Surreal<Client> {
     let db = Surreal::new::<Ws>("127.0.0.1:8000")
         .await
@@ -38,14 +39,21 @@ async fn setup_test_db() -> Surreal<Client> {
     db
 }
 
-/// Setup test NATS connection
-async fn setup_test_nats() -> async_nats::Client {
-    async_nats::connect("127.0.0.1:4222")
+async fn setup_test_nats_bridge(registry: Arc<AgentRegistry>) -> Arc<NatsBridge> {
+    let config = NatsBrokerConfig {
+        url: "nats://127.0.0.1:4222".to_string(),
+        stream_name: "VAPORA_TASKS_TEST".to_string(),
+        consumer_name: "vapora-a2a-integration-test".to_string(),
+        ..NatsBrokerConfig::default()
+    };
+    Arc::new(
+        NatsBridge::connect(config, registry)
             .await
-        .expect("Failed to connect to NATS")
+            .expect("Failed to connect NatsBridge"),
+    )
 }
 
-/// Test 1: Task persistence - tasks survive restarts
+/// Test 1: Task persistence — tasks survive TaskManager restart
 #[tokio::test]
 #[ignore] // Requires SurrealDB running
 async fn test_task_persistence_after_restart() {
@@ -61,62 +69,65 @@ async fn test_task_persistence_after_restart() {
         metadata: Default::default(),
     };
 
-    // Create task
     task_manager
         .create(task)
         .await
         .expect("Failed to create task");
 
-    // Simulate restart by creating new TaskManager instance
+    // Simulate restart with a new TaskManager instance pointing to same DB
     let task_manager2 = Arc::new(TaskManager::new(db.clone()));
 
-    // Verify task still exists
     let status = task_manager2
         .get("persistence-test-123")
         .await
-        .expect("Failed to get status after restart");
+        .expect("Task not found after restart");
 
     assert_eq!(status.id, "persistence-test-123");
     assert_eq!(status.state, TaskState::Waiting.as_str());
 
-    // Cleanup
     let _ = db
         .query("DELETE FROM a2a_tasks WHERE task_id = $task_id")
         .bind(("task_id", "persistence-test-123"))
         .await;
 }
 
-/// Test 2: NATS task completion updates DB correctly
+/// Test 2: JetStream result updates DB — NatsBridge receives TaskResult and
+/// persists completion to SurrealDB
 #[tokio::test]
 #[ignore] // Requires SurrealDB + NATS running
-async fn test_nats_task_completion_updates_db() {
+async fn test_jetstream_task_completion_updates_db() {
     let db = setup_test_db().await;
-    let nats = setup_test_nats().await;
+    let registry = Arc::new(AgentRegistry::new(10));
+    let nats_bridge = setup_test_nats_bridge(registry.clone()).await;
 
     let task_manager = Arc::new(TaskManager::new(db.clone()));
-    let registry = Arc::new(AgentRegistry::new(10));
     let config = AgentConfig::default();
-    let coordinator = Arc::new(AgentCoordinator::new(config, registry).await.unwrap());
+    let coordinator = Arc::new(
+        AgentCoordinator::new(config, registry)
+            .await
+            .expect("Failed to create coordinator"),
+    );
 
     let bridge = Arc::new(CoordinatorBridge::new(
         coordinator,
         task_manager.clone(),
-        Some(nats.clone()),
+        Some(nats_bridge.clone()),
     ));
 
     bridge
         .start_result_listener()
         .await
-        .expect("Failed to start listener");
+        .expect("Failed to start result listener");
 
-    let task_id = "nats-completion-test-456".to_string();
+    let task_id = "jetstream-completion-test-456".to_string();
 
-    // Create task
     let task = A2aTask {
         id: task_id.clone(),
         message: A2aMessage {
             role: "user".to_string(),
-            parts: vec![A2aMessagePart::Text("Test NATS completion".to_string())],
+            parts: vec![A2aMessagePart::Text(
+                "Test JetStream completion".to_string(),
+            )],
         },
         metadata: Default::default(),
     };
@@ -126,57 +137,57 @@ async fn test_nats_task_completion_updates_db() {
         .await
         .expect("Failed to create task");
 
-    // Publish TaskCompleted message to NATS
-    let task_completed = TaskCompleted {
+    // Publish TaskResult to JetStream via a separate raw client — simulates
+    // agent completing a task and publishing to vapora.tasks.completed.
+    let raw_client = async_nats::connect("127.0.0.1:4222")
+        .await
+        .expect("Failed to connect raw NATS client");
+    let js = async_nats::jetstream::new(raw_client);
+
+    let result = TaskResult {
         task_id: task_id.clone(),
         agent_id: "test-agent".to_string(),
         result: "Test output from agent".to_string(),
-        artifacts: vec!["/path/to/artifact.txt".to_string()],
-        tokens_used: 100,
+        success: true,
         duration_ms: 500,
-        completed_at: chrono::Utc::now(),
     };
 
-    let message = AgentMessage::TaskCompleted(task_completed);
-    nats.publish(
-        "vapora.tasks.completed",
-        serde_json::to_vec(&message).unwrap().into(),
+    js.publish(
+        "vapora.tasks.completed".to_string(),
+        serde_json::to_vec(&result).unwrap().into(),
     )
     .await
-    .expect("Failed to publish");
+    .expect("Failed to publish to JetStream")
+    .await
+    .expect("Failed to receive JetStream ack");
 
-    // Wait for DB update (give NATS subscriber time to process)
-    sleep(Duration::from_millis(1000)).await;
+    // Allow the pull consumer to fetch and process the message
+    sleep(Duration::from_millis(1500)).await;
 
-    // Verify DB updated
     let status = task_manager
         .get(&task_id)
         .await
-        .expect("Failed to get status");
+        .expect("Failed to get task status");
 
     assert_eq!(status.state, TaskState::Completed.as_str());
     assert!(status.result.is_some());
 
-    let result = status.result.unwrap();
-    assert_eq!(result.message.parts.len(), 1);
+    let result_msg = status.result.unwrap();
+    assert_eq!(result_msg.message.parts.len(), 1);
 
-    if let A2aMessagePart::Text(text) = &result.message.parts[0] {
+    if let A2aMessagePart::Text(text) = &result_msg.message.parts[0] {
         assert_eq!(text, "Test output from agent");
     } else {
         panic!("Expected text message part");
     }
 
-    assert!(result.artifacts.is_some());
-    assert_eq!(result.artifacts.as_ref().unwrap().len(), 1);
-
-    // Cleanup
     let _ = db
         .query("DELETE FROM a2a_tasks WHERE task_id = $task_id")
         .bind(("task_id", task_id))
         .await;
 }
 
-/// Test 3: Task state transitions work correctly
+/// Test 3: Task state transitions work correctly (SurrealDB only)
 #[tokio::test]
 #[ignore] // Requires SurrealDB running
 async fn test_task_state_transitions() {
@@ -194,7 +205,6 @@ async fn test_task_state_transitions() {
         metadata: Default::default(),
     };
 
-    // Create task (waiting state)
     task_manager
         .create(task)
         .await
@@ -203,7 +213,6 @@ async fn test_task_state_transitions() {
     let status = task_manager.get(&task_id).await.unwrap();
     assert_eq!(status.state, TaskState::Waiting.as_str());
 
-    // Transition to working
     task_manager
         .update_state(&task_id, TaskState::Working)
         .await
@@ -212,7 +221,6 @@ async fn test_task_state_transitions() {
     let status = task_manager.get(&task_id).await.unwrap();
     assert_eq!(status.state, TaskState::Working.as_str());
 
-    // Complete task
     let result = vapora_a2a::protocol::A2aTaskResult {
         message: A2aMessage {
             role: "assistant".to_string(),
@@ -230,14 +238,13 @@ async fn test_task_state_transitions() {
     assert_eq!(status.state, TaskState::Completed.as_str());
     assert!(status.result.is_some());
 
-    // Cleanup
     let _ = db
         .query("DELETE FROM a2a_tasks WHERE task_id = $task_id")
         .bind(("task_id", task_id))
         .await;
 }
 
-/// Test 4: Task failure handling
+/// Test 4: Task failure handling (SurrealDB only)
 #[tokio::test]
 #[ignore] // Requires SurrealDB running
 async fn test_task_failure_handling() {
@@ -260,7 +267,6 @@ async fn test_task_failure_handling() {
         .await
         .expect("Failed to create task");
 
-    // Fail task
     let error = vapora_a2a::protocol::A2aErrorObj {
         code: -1,
         message: "Test error message".to_string(),
@@ -276,7 +282,6 @@ async fn test_task_failure_handling() {
     assert!(status.error.is_some());
     assert_eq!(status.error.unwrap().message, "Test error message");
 
-    // Cleanup
     let _ = db
         .query("DELETE FROM a2a_tasks WHERE task_id = $task_id")
         .bind(("task_id", task_id))
@@ -288,23 +293,27 @@ async fn test_task_failure_handling() {
 #[ignore] // Requires SurrealDB + NATS + Agent running
 async fn test_end_to_end_task_dispatch() {
     let db = setup_test_db().await;
-    let nats = setup_test_nats().await;
+    let registry = Arc::new(AgentRegistry::new(10));
+    let nats_bridge = setup_test_nats_bridge(registry.clone()).await;
 
     let task_manager = Arc::new(TaskManager::new(db.clone()));
-    let registry = Arc::new(AgentRegistry::new(10));
     let config = AgentConfig::default();
-    let coordinator = Arc::new(AgentCoordinator::new(config, registry).await.unwrap());
+    let coordinator = Arc::new(
+        AgentCoordinator::new(config, registry)
+            .await
+            .expect("Failed to create coordinator"),
+    );
 
     let bridge = Arc::new(CoordinatorBridge::new(
         coordinator,
         task_manager.clone(),
-        Some(nats.clone()),
+        Some(nats_bridge),
     ));
 
     bridge
         .start_result_listener()
         .await
-        .expect("Failed to start listener");
+        .expect("Failed to start result listener");
 
     let task = A2aTask {
         id: "e2e-test-task-001".to_string(),
@@ -317,57 +326,36 @@ async fn test_end_to_end_task_dispatch() {
         metadata: Default::default(),
     };
 
-    // Dispatch task
     let task_id = bridge
         .dispatch(task)
         .await
         .expect("Failed to dispatch task");
 
-    // Poll for completion with timeout
-    let result = timeout(Duration::from_secs(60), async {
-        loop {
-            let status = bridge
-                .get_task(&task_id)
-                .await
-                .expect("Failed to get status");
+    assert!(!task_id.is_empty());
 
-            match task_state_from_str(&status.state) {
-                TaskState::Completed => return Ok(status),
-                TaskState::Failed => return Err(format!("Task failed: {:?}", status.error)),
-                _ => {
+    let status_result = timeout(Duration::from_secs(30), async {
+        loop {
+            let status = task_manager.get(&task_id).await.unwrap();
+            if status.state == TaskState::Completed.as_str()
+                || status.state == TaskState::Failed.as_str()
+            {
+                return status;
+            }
             sleep(Duration::from_millis(500)).await;
         }
-            }
-        }
     })
     .await;
 
-    match result {
-        Ok(Ok(status)) => {
-            println!("Task completed successfully: {:?}", status);
-            assert_eq!(status.state, TaskState::Completed.as_str());
-        }
-        Ok(Err(e)) => panic!("Task failed: {}", e),
-        Err(_) => {
-            println!(
-                "Task did not complete within 60 seconds (this is expected if no agent is running)"
+    assert!(
+        status_result.is_ok(),
+        "Task did not complete within 30 seconds"
     );
-            // Cleanup partial task
+
+    let final_status = status_result.unwrap();
+    assert_eq!(final_status.state, TaskState::Completed.as_str());
+
     let _ = db
         .query("DELETE FROM a2a_tasks WHERE task_id = $task_id")
         .bind(("task_id", task_id))
         .await;
 }
-    }
-}
-
-// Helper to convert string to TaskState
-fn task_state_from_str(s: &str) -> TaskState {
-    match s {
-        "waiting" => TaskState::Waiting,
-        "working" => TaskState::Working,
-        "completed" => TaskState::Completed,
-        "failed" => TaskState::Failed,
-        _ => TaskState::Waiting,
-    }
-}

crates/vapora-agents/src/lib.rs

@@ -8,6 +8,7 @@ pub mod coordinator;
 pub mod learning_profile;
 pub mod loader;
 pub mod messages;
+pub mod nats_bridge;
 pub mod persistence_trait;
 pub mod profile_adapter;
 pub mod registry;

crates/vapora-agents/src/nats_bridge.rs

@@ -0,0 +1,425 @@
+use std::sync::Arc;
+
+use async_nats::jetstream::{self, consumer::pull, stream};
+use serde::{Deserialize, Serialize};
+use thiserror::Error;
+use tokio::sync::mpsc;
+use tracing::{error, info, warn};
+
+use crate::registry::AgentRegistry;
+
+/// Configuration for the NATS JetStream broker connection.
+#[derive(Debug, Clone)]
+pub struct NatsBrokerConfig {
+    /// NATS server URL (e.g. `nats://localhost:4222`).
+    pub url: String,
+    /// JetStream stream name; created if it does not exist.
+    pub stream_name: String,
+    /// Subject for dispatching tasks into the stream.
+    pub dispatch_subject: String,
+    /// Subject consumed for task results (maps to `vapora.tasks.completed`).
+    pub result_subject: String,
+    /// Durable consumer name for result subscriptions.
+    pub consumer_name: String,
+}
+
+impl Default for NatsBrokerConfig {
+    fn default() -> Self {
+        Self {
+            url: "nats://localhost:4222".to_string(),
+            stream_name: "VAPORA_TASKS".to_string(),
+            dispatch_subject: "vapora.tasks.dispatch".to_string(),
+            result_subject: crate::messages::subjects::TASKS_COMPLETED.to_string(),
+            consumer_name: "vapora-nats-bridge".to_string(),
+        }
+    }
+}
+
+/// Task message dispatched to JetStream for agent processing.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TaskMessage {
+    pub task_id: String,
+    pub title: String,
+    pub description: String,
+    pub role: String,
+    pub context: String,
+    pub priority: u32,
+}
+
+/// Task result received from the `vapora.tasks.completed` JetStream subject.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct TaskResult {
+    pub task_id: String,
+    pub agent_id: String,
+    pub result: String,
+    pub success: bool,
+    pub duration_ms: u64,
+}
+
+/// Agent status snapshot from the registry — never hardcoded.
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AgentStatusInfo {
+    pub agent_id: String,
+    pub role: String,
+    pub available: bool,
+    pub current_tasks: usize,
+    pub max_tasks: usize,
+}
+
+#[derive(Debug, Error)]
+pub enum NatsBridgeError {
+    #[error("NATS connection failed: {0}")]
+    Connection(String),
+
+    #[error("JetStream stream error: {0}")]
+    Stream(String),
+
+    #[error("JetStream consumer error: {0}")]
+    Consumer(String),
+
+    #[error("Publish ack error: {0}")]
+    Publish(String),
+
+    #[error("Serialization error: {0}")]
+    Serialization(#[from] serde_json::Error),
+}
+
+/// JetStream-backed bridge for durable task dispatch and result consumption.
+///
+/// Maintains a `VAPORA_TASKS` stream covering `vapora.tasks.dispatch` and
+/// `vapora.tasks.completed`. Tasks are published with full JetStream acks;
+/// results are consumed via a durable pull consumer so no messages are lost on
+/// process restart.
+pub struct NatsBridge {
+    jetstream: jetstream::Context,
+    config: NatsBrokerConfig,
+    registry: Arc<AgentRegistry>,
+}
+
+impl NatsBridge {
+    /// Connect to NATS and ensure the JetStream stream exists.
+    ///
+    /// The stream uses `WorkQueue` retention so each message is delivered to
+    /// exactly one consumer and removed after ack.
+    pub async fn connect(
+        config: NatsBrokerConfig,
+        registry: Arc<AgentRegistry>,
+    ) -> Result<Self, NatsBridgeError> {
+        let client = async_nats::connect(&config.url)
+            .await
+            .map_err(|e| NatsBridgeError::Connection(e.to_string()))?;
+
+        let jetstream = jetstream::new(client);
+
+        let stream_config = stream::Config {
+            name: config.stream_name.clone(),
+            subjects: vec![
+                config.dispatch_subject.clone(),
+                config.result_subject.clone(),
+            ],
+            retention: stream::RetentionPolicy::WorkQueue,
+            storage: stream::StorageType::File,
+            num_replicas: 1,
+            ..Default::default()
+        };
+
+        jetstream
+            .get_or_create_stream(stream_config)
+            .await
+            .map_err(|e| NatsBridgeError::Stream(e.to_string()))?;
+
+        info!(
+            url = %config.url,
+            stream = %config.stream_name,
+            dispatch = %config.dispatch_subject,
+            result = %config.result_subject,
+            "NatsBridge connected; JetStream stream ensured"
+        );
+
+        Ok(Self {
+            jetstream,
+            config,
+            registry,
+        })
+    }
+
+    /// Publish a task to JetStream with a synchronous ack.
+    ///
+    /// Returns the stream sequence number assigned to this message. The ack
+    /// guarantees the message reached the NATS server and was persisted in the
+    /// stream before returning.
+    pub async fn submit_task(&self, task: TaskMessage) -> Result<u64, NatsBridgeError> {
+        let payload = serde_json::to_vec(&task)?;
+
+        let ack = self
+            .jetstream
+            .publish(self.config.dispatch_subject.clone(), payload.into())
+            .await
+            .map_err(|e| NatsBridgeError::Publish(e.to_string()))?
+            .await
+            .map_err(|e| NatsBridgeError::Publish(e.to_string()))?;
+
+        info!(
+            task_id = %task.task_id,
+            sequence = ack.sequence,
+            subject = %self.config.dispatch_subject,
+            "Task dispatched to JetStream"
+        );
+
+        Ok(ack.sequence)
+    }
+
+    /// Start a background pull consumer for `vapora.tasks.completed`.
+    ///
+    /// Spawns a tokio task that continuously fetches from the durable consumer
+    /// and sends deserialized `TaskResult` values into the returned channel.
+    /// Each message is ack-ed after successful deserialization; failed
+    /// deserialization sends a Nak so the message is redelivered.
+    ///
+    /// The consumer is durable — if the process restarts it will resume from
+    /// the last unacked position.
+    pub async fn subscribe_task_results(
+        &self,
+    ) -> Result<mpsc::Receiver<TaskResult>, NatsBridgeError> {
+        let stream = self
+            .jetstream
+            .get_stream(&self.config.stream_name)
+            .await
+            .map_err(|e| NatsBridgeError::Stream(e.to_string()))?;
+
+        let consumer: async_nats::jetstream::consumer::Consumer<pull::Config> = stream
+            .get_or_create_consumer(
+                &self.config.consumer_name,
+                pull::Config {
+                    durable_name: Some(self.config.consumer_name.clone()),
+                    filter_subject: self.config.result_subject.clone(),
+                    ..Default::default()
+                },
+            )
+            .await
+            .map_err(|e| NatsBridgeError::Consumer(e.to_string()))?;
+
+        let (tx, rx) = mpsc::channel::<TaskResult>(256);
+
+        tokio::spawn(run_result_consumer(consumer, tx));
+
+        info!(
+            consumer = %self.config.consumer_name,
+            subject = %self.config.result_subject,
+            "Task result pull consumer started"
+        );
+
+        Ok(rx)
+    }
+
+    /// List all registered agents from the registry.
+    ///
+    /// Never returns hardcoded data — always reflects the live registry state.
+    pub fn list_agents(&self) -> Vec<AgentStatusInfo> {
+        self.registry
+            .list_all()
+            .into_iter()
+            .map(|agent| {
+                let available = agent.can_accept_task();
+                AgentStatusInfo {
+                    agent_id: agent.id,
+                    role: agent.role,
+                    available,
+                    current_tasks: agent.current_tasks as usize,
+                    max_tasks: agent.max_concurrent_tasks as usize,
+                }
+            })
+            .collect()
+    }
+}
+
+/// Pull consumer loop: fetches JetStream messages, deserializes, acks, and
+/// forwards `TaskResult` values to `tx`. Extracted to avoid excessive nesting
+/// inside the `tokio::spawn` closure.
+async fn run_result_consumer(
+    consumer: async_nats::jetstream::consumer::Consumer<pull::Config>,
+    tx: mpsc::Sender<TaskResult>,
+) {
+    let mut messages = match consumer.messages().await {
+        Ok(m) => m,
+        Err(e) => {
+            error!(error = %e, "Failed to create JetStream message stream");
+            return;
+        }
+    };
+
+    while let Some(msg_result) = futures::StreamExt::next(&mut messages).await {
+        let msg = match msg_result {
+            Ok(m) => m,
+            Err(e) => {
+                error!(error = %e, "JetStream message error; stopping consumer");
+                break;
+            }
+        };
+
+        match serde_json::from_slice::<TaskResult>(&msg.payload) {
+            Ok(result) => {
+                if let Err(e) = msg.ack().await {
+                    error!(error = %e, "Failed to ack JetStream message");
+                    continue;
+                }
+                if tx.send(result).await.is_err() {
+                    warn!("Result receiver dropped; stopping consumer loop");
+                    break;
+                }
+            }
+            Err(e) => {
+                warn!(error = %e, "Failed to deserialize TaskResult; sending Nak");
+                if let Err(nak_err) = msg
+                    .ack_with(async_nats::jetstream::AckKind::Nak(None))
+                    .await
+                {
+                    error!(error = %nak_err, "Failed to Nak message");
+                }
+            }
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::registry::{AgentMetadata, AgentRegistry};
+
+    fn make_registry_with_agent() -> Arc<AgentRegistry> {
+        let reg = Arc::new(AgentRegistry::new(5));
+        let agent = AgentMetadata::new(
+            "developer".to_string(),
+            "Dev 1".to_string(),
+            "claude".to_string(),
+            "claude-sonnet-4-6".to_string(),
+            vec!["coding".to_string()],
+        );
+        reg.register_agent(agent).unwrap();
+        reg
+    }
+
+    #[test]
+    fn list_agents_reflects_registry() {
+        let registry = make_registry_with_agent();
+        // NatsBridge::list_agents requires a connected bridge, so test via a
+        // registry snapshot directly to verify the mapping logic.
+        let agents: Vec<AgentStatusInfo> = registry
+            .list_all()
+            .into_iter()
+            .map(|agent| {
+                let available = agent.can_accept_task();
+                AgentStatusInfo {
+                    agent_id: agent.id,
+                    role: agent.role,
+                    available,
+                    current_tasks: agent.current_tasks as usize,
+                    max_tasks: agent.max_concurrent_tasks as usize,
+                }
+            })
+            .collect();
+
+        assert_eq!(agents.len(), 1);
+        assert_eq!(agents[0].role, "developer");
+        assert!(agents[0].available);
+        assert_eq!(agents[0].current_tasks, 0);
+        assert_eq!(agents[0].max_tasks, 5);
+    }
+
+    #[test]
+    fn task_message_roundtrip_serialization() {
+        let msg = TaskMessage {
+            task_id: "t-1".to_string(),
+            title: "Fix bug".to_string(),
+            description: "Critical regression in auth".to_string(),
+            role: "developer".to_string(),
+            context: "{}".to_string(),
+            priority: 90,
+        };
+        let bytes = serde_json::to_vec(&msg).unwrap();
+        let decoded: TaskMessage = serde_json::from_slice(&bytes).unwrap();
+        assert_eq!(decoded.task_id, msg.task_id);
+        assert_eq!(decoded.priority, msg.priority);
+    }
+
+    #[test]
+    fn task_result_roundtrip_serialization() {
+        let result = TaskResult {
+            task_id: "t-1".to_string(),
+            agent_id: "agent-dev-1".to_string(),
+            result: "Bug fixed in auth.rs:42".to_string(),
+            success: true,
+            duration_ms: 4200,
+        };
+        let bytes = serde_json::to_vec(&result).unwrap();
+        let decoded: TaskResult = serde_json::from_slice(&bytes).unwrap();
+        assert!(decoded.success);
+        assert_eq!(decoded.duration_ms, 4200);
+    }
+
+    /// Integration test: requires NATS server at nats://localhost:4222.
+    /// Run with: cargo test -p vapora-agents nats_bridge -- --ignored
+    #[tokio::test]
+    #[ignore]
+    async fn submit_task_receives_ack() {
+        let registry = make_registry_with_agent();
+        let config = NatsBrokerConfig::default();
+
+        let bridge = NatsBridge::connect(config, registry)
+            .await
+            .expect("NATS must be running at localhost:4222");
+
+        let task = TaskMessage {
+            task_id: "integration-t-1".to_string(),
+            title: "Integration test task".to_string(),
+            description: "Verify JetStream publish ack".to_string(),
+            role: "developer".to_string(),
+            context: "{}".to_string(),
+            priority: 50,
+        };
+
+        let sequence = bridge.submit_task(task).await.unwrap();
+        assert!(sequence > 0, "JetStream ack sequence must be > 0");
+    }
+
+    /// Integration test: requires NATS server at nats://localhost:4222.
+    #[tokio::test]
+    #[ignore]
+    async fn subscribe_task_results_receives_published_result() {
+        use tokio::time::{timeout, Duration};
+
+        let registry = make_registry_with_agent();
+        let config = NatsBrokerConfig::default();
+
+        let bridge = NatsBridge::connect(config.clone(), registry)
+            .await
+            .expect("NATS must be running at localhost:4222");
+
+        let mut rx = bridge.subscribe_task_results().await.unwrap();
+
+        // Publish a result directly to the result subject via JetStream
+        let result = TaskResult {
+            task_id: "integration-t-2".to_string(),
+            agent_id: "agent-dev-1".to_string(),
+            result: "Done".to_string(),
+            success: true,
+            duration_ms: 100,
+        };
+        let payload = serde_json::to_vec(&result).unwrap();
+        bridge
+            .jetstream
+            .publish(config.result_subject.clone(), payload.into())
+            .await
+            .unwrap()
+            .await
+            .unwrap();
+
+        let received = timeout(Duration::from_secs(5), rx.recv())
+            .await
+            .expect("Timeout waiting for result")
+            .expect("Channel closed");
+
+        assert_eq!(received.task_id, "integration-t-2");
+        assert!(received.success);
+    }
+}

crates/vapora-agents/src/swarm_adapter.rs

@@ -1,9 +1,7 @@
-// Adapter implementing SwarmCoordination trait using real SwarmCoordinator
-// Decouples agent orchestration from swarm details
-
 use std::sync::Arc;
 
 use async_trait::async_trait;
+use uuid::Uuid;
 use vapora_swarm::coordinator::SwarmCoordinator;
 
 use crate::coordination::{AgentAssignment, AgentLoad, AgentProfile, SwarmCoordination};
@@ -23,7 +21,6 @@ impl SwarmCoordinationAdapter {
 #[async_trait]
 impl SwarmCoordination for SwarmCoordinationAdapter {
     async fn register_profiles(&self, profiles: Vec<AgentProfile>) -> anyhow::Result<()> {
-        // Convert internal AgentProfile to swarm's AgentProfile
         for profile in profiles {
             let swarm_profile = vapora_swarm::messages::AgentProfile {
                 id: profile.id.clone(),
@@ -38,37 +35,79 @@ impl SwarmCoordination for SwarmCoordinationAdapter {
         Ok(())
     }
 
+    /// Select best agent via swarm bidding.
+    ///
+    /// Uses `submit_task_for_bidding` which applies load-balanced scoring
+    /// (success_rate / (1 + current_load)) across all available agents with
+    /// matching capabilities.
     async fn select_agent(
         &self,
-        _task_type: &str,
-        _required_expertise: Option<&str>,
+        task_type: &str,
+        required_expertise: Option<&str>,
     ) -> anyhow::Result<AgentAssignment> {
-        // For now, return a placeholder - real swarm selection would happen here
-        // This is a simplified version - full implementation would query
-        // swarm.submit_task_for_bidding()
+        let capabilities: Vec<String> = match required_expertise {
+            Some(exp) => vec![task_type.to_string(), exp.to_string()],
+            None => vec![task_type.to_string()],
+        };
+
+        // Use a ephemeral task_id for selection; the caller manages actual task IDs.
+        let selection_id = Uuid::new_v4().to_string();
+
+        let agent_id = self
+            .swarm
+            .submit_task_for_bidding(selection_id, task_type.to_string(), capabilities)
+            .await
+            .map_err(|e| anyhow::anyhow!("Swarm bidding failed: {}", e))?
+            .ok_or_else(|| anyhow::anyhow!("No available agent for task_type: {}", task_type))?;
+
+        let confidence = self
+            .swarm
+            .get_agent(&agent_id)
+            .map(|profile| profile.success_rate)
+            .unwrap_or(0.5);
+
         Ok(AgentAssignment {
-            agent_id: "default-agent".to_string(),
-            agent_name: "Default Agent".to_string(),
-            confidence: 0.5,
+            // Swarm profiles use ID as display name (no separate name field)
+            agent_name: agent_id.clone(),
+            agent_id,
+            confidence,
         })
     }
 
+    /// Report task completion and update agent load in the swarm.
+    ///
+    /// On success the agent is marked available with minimal load.
+    /// On failure the agent receives a penalty load (0.5) to deprioritize it
+    /// in future selections until it recovers.
     async fn report_completion(
         &self,
-        _agent_id: &str,
-        _success: bool,
+        agent_id: &str,
+        success: bool,
         _duration_ms: u64,
     ) -> anyhow::Result<()> {
-        // Report task completion to swarm for load balancing updates
-        Ok(())
+        let new_load = if success { 0.0 } else { 0.5 };
+        self.swarm
+            .update_agent_status(agent_id, new_load, true)
+            .map_err(|e| anyhow::anyhow!("Failed to update agent status: {}", e))
     }
 
-    async fn agent_load(&self, _agent_id: &str) -> anyhow::Result<AgentLoad> {
-        // Query agent load from swarm
+    /// Query current agent load from swarm profile.
+    ///
+    /// Infers `current_tasks` from the fractional load stored in the swarm
+    /// profile (each task represents ~10% of a capacity-10 agent).
+    async fn agent_load(&self, agent_id: &str) -> anyhow::Result<AgentLoad> {
+        let profile = self
+            .swarm
+            .get_agent(agent_id)
+            .ok_or_else(|| anyhow::anyhow!("Agent not found in swarm: {}", agent_id))?;
+
+        const CAPACITY: usize = 10;
+        let current_tasks = (profile.current_load * CAPACITY as f64).round() as usize;
+
         Ok(AgentLoad {
-            agent_id: _agent_id.to_string(),
-            current_tasks: 0,
-            capacity: 10,
+            agent_id: agent_id.to_string(),
+            current_tasks,
+            capacity: CAPACITY,
         })
     }
 }

crates/vapora-leptos-ui/Cargo.toml

@@ -11,6 +11,7 @@ keywords = ["leptos", "ui", "components", "glassmorphism", "wasm"]
 
 [lib]
 crate-type = ["cdylib", "rlib"]
+doctest = false
 
 [features]
 default = []

crates/vapora-swarm/src/coordinator.rs

@@ -331,6 +331,11 @@ impl SwarmCoordinator {
             .get(task_id)
             .map(|entry| entry.value().clone())
     }
+
+    /// Get agent profile by ID (for load/status queries).
+    pub fn get_agent(&self, agent_id: &str) -> Option<AgentProfile> {
+        self.agents.get(agent_id).map(|entry| entry.value().clone())
+    }
 }
 
 /// Swarm statistics