Add script to test actor/context/job/flow create and flow dag

Signed-off-by: Lee Smet <lee.smet@hotmail.com>

Cargo.toml

@@ -16,3 +16,10 @@ redis = { version = "0.32.5", features = [
 ] }
 jsonrpsee = { version = "0.26.0", features = ["server", "macros"] }
 async-trait = "0.1.83"
+# HTTP client to call Mycelium JSON-RPC
+reqwest = { version = "0.12.7", features = ["json", "rustls-tls"] }
+# Base64 encoding for message payloads
+base64 = "0.22.1"
+# Error derive for clean error types
+thiserror = "2.0.16"
+tracing-subscriber = { version = "0.3.18", features = ["env-filter", "fmt"] }

scripts/jsonrpc_demo.py

@@ -0,0 +1,361 @@
+#!/usr/bin/env python3
+"""
+Demo script for HeroCoordinator JSON-RPC API.
+- Creates an actor
+- Verifies by loading the actor
+- Creates a context with the actor as admin/reader/executor
+- Creates three jobs with dependencies
+- Creates a flow referencing those jobs
+- Fetches and prints the flow DAG
+
+Usage:
+  COORDINATOR_URL=http://127.0.0.1:9652 python3 scripts/jsonrpc_demo.py
+Defaults to http://127.0.0.1:9652 if COORDINATOR_URL is not set.
+"""
+import os
+import json
+import sys
+from urllib import request, error
+from typing import Any, Dict, List, Tuple
+
+JSONRPC_VERSION = "2.0"
+
+class JsonRpcClient:
+    def __init__(self, url: str):
+        self.url = url.rstrip("/")
+        self._id = 0
+
+    def call(self, method: str, params: Dict[str, Any]) -> Any:
+        self._id += 1
+        payload = {
+            "jsonrpc": JSONRPC_VERSION,
+            "id": self._id,
+            "method": method,
+            "params": params,
+        }
+        data = json.dumps(payload).encode("utf-8")
+        req = request.Request(self.url, data=data, headers={"Content-Type": "application/json"})
+        try:
+            with request.urlopen(req) as resp:
+                body = resp.read()
+        except error.HTTPError as e:
+            try:
+                details = e.read().decode("utf-8", "ignore")
+            except Exception:
+                details = ""
+            raise RuntimeError(f"HTTP error {e.code}: {details}") from e
+        except error.URLError as e:
+            raise RuntimeError(f"URL error: {e.reason}") from e
+
+        try:
+            obj = json.loads(body.decode("utf-8"))
+        except Exception as e:
+            raise RuntimeError(f"Invalid JSON response: {body!r}") from e
+
+        # JSON-RPC single response expected
+        if isinstance(obj, list):
+            raise RuntimeError("Batch responses are not supported in this demo")
+
+        if obj.get("error"):
+            raise RuntimeError(f"RPC error: {json.dumps(obj['error'])}")
+
+        return obj.get("result")
+
+def print_header(title: str):
+    print("\n" + "=" * 80)
+    print(title)
+    print("=" * 80)
+
+def pretty_print(obj: Any):
+    print(json.dumps(obj, indent=2, sort_keys=True))
+
+def summarize_dag(dag: Dict[str, Any]):
+    print_header("Flow DAG Summary")
+    flow_id = dag.get("flow_id")
+    caller_id = dag.get("caller_id")
+    context_id = dag.get("context_id")
+    print(f"flow_id={flow_id} caller_id={caller_id} context_id={context_id}")
+    edges: List[Tuple[int, int]] = dag.get("edges", [])
+    roots: List[int] = dag.get("roots", [])
+    leaves: List[int] = dag.get("leaves", [])
+    levels: List[List[int]] = dag.get("levels", [])
+    nodes: Dict[str, Any] = dag.get("nodes", {})
+
+    print("Edges:")
+    for a, b in edges:
+        print(f"  {a} -> {b}")
+
+    print(f"Roots: {roots}")
+    print(f"Leaves: {leaves}")
+    print("Levels:")
+    for i, lvl in enumerate(levels):
+        print(f"  L{i}: {lvl}")
+
+    # Show nodes and their dependencies (from JobSummary)
+    print("Nodes:")
+    for k, v in nodes.items():
+        depends = v.get("depends", [])
+        prerequisites = v.get("prerequisites", [])
+        stype = v.get("script_type")
+        print(f"  Job {k}: depends={depends} prerequisites={prerequisites} script_type={stype}")
+
+def assert_edges(edges: List[Tuple[int, int]], required: List[Tuple[int, int]]):
+    edge_set = {(int(a), int(b)) for a, b in edges}
+    missing = [e for e in required if e not in edge_set]
+    if missing:
+        raise AssertionError(f"Missing expected edges in DAG: {missing}; got={sorted(edge_set)}")
+
+def main():
+    url = os.getenv("COORDINATOR_URL", "http://127.0.0.1:9652")
+    client = JsonRpcClient(url)
+
+    # Deterministic demo IDs; change if collisions happen
+    actor_id = 1001
+    context_id = 1  # Redis DB indices are 0-15; keep <= 15
+    job_a = 3001
+    job_b = 3002
+    job_c = 3003
+    job_d = 3004
+    job_e = 3005
+    job_f = 3006
+    job_g = 3007
+    job_h = 3008
+    job_i = 3009
+    flow_id = 4001
+
+    print_header("actor.create")
+    actor = client.call("actor.create", {
+        "actor": {
+            "id": actor_id,
+            "pubkey": "demo-pubkey",
+            "address": ["127.0.0.1"]
+        }
+    })
+    pretty_print(actor)
+
+    print_header("actor.load")
+    actor_loaded = client.call("actor.load", {"id": actor_id})
+    pretty_print(actor_loaded)
+
+    print_header("context.create")
+    context = client.call("context.create", {
+        "context": {
+            "id": context_id,
+            "admins": [actor_id],
+            "readers": [actor_id],
+            "executors": [actor_id]
+        }
+    })
+    pretty_print(context)
+
+    print_header("job.create - A (root)")
+    jobA = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_a,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('A')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": []
+        }
+    })
+    pretty_print(jobA)
+
+    print_header("job.create - B (root)")
+    jobB = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_b,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('B')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": []
+        }
+    })
+    pretty_print(jobB)
+
+    print_header("job.create - C (depends on A and B)")
+    jobC = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_c,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('C')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_a, job_b]
+        }
+    })
+    pretty_print(jobC)
+
+    print_header("job.create - D (depends on A)")
+    jobD = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_d,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('D')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_a]
+        }
+    })
+    pretty_print(jobD)
+
+    print_header("job.create - E (depends on B)")
+    jobE = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_e,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('E')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_b]
+        }
+    })
+    pretty_print(jobE)
+
+    print_header("job.create - F (depends on C and D)")
+    jobF = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_f,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('F')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_c, job_d]
+        }
+    })
+    pretty_print(jobF)
+
+    print_header("job.create - G (depends on C and E)")
+    jobG = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_g,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('G')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_c, job_e]
+        }
+    })
+    pretty_print(jobG)
+
+    print_header("job.create - H (leaf; depends on F and G)")
+    jobH = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_h,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('H')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_f, job_g]
+        }
+    })
+    pretty_print(jobH)
+
+    print_header("job.create - I (leaf; depends on F and G)")
+    jobI = client.call("job.create", {
+        "context_id": context_id,
+        "job": {
+            "id": job_i,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "script": "print('I')",
+            "script_type": "Python",
+            "timeout": 30,
+            "retries": 0,
+            "env_vars": {},
+            "prerequisites": [],
+            "depends": [job_f, job_g]
+        }
+    })
+    pretty_print(jobI)
+
+    print_header("flow.create")
+    flow = client.call("flow.create", {
+        "context_id": context_id,
+        "flow": {
+            "id": flow_id,
+            "caller_id": actor_id,
+            "context_id": context_id,
+            "jobs": [job_a, job_b, job_c, job_d, job_e, job_f, job_g, job_h, job_i],
+            "env_vars": {}
+        }
+    })
+    pretty_print(flow)
+
+    print_header("flow.dag")
+    dag = client.call("flow.dag", {"context_id": context_id, "id": flow_id})
+    summarize_dag(dag)
+
+    # Validate roots and leaves
+    got_roots = list(map(int, dag.get("roots", [])))
+    if got_roots != sorted([job_a, job_b]):
+        print("WARNING: Unexpected roots:", got_roots, file=sys.stderr)
+
+    got_leaves = {int(x) for x in dag.get("leaves", [])}
+    expected_leaves = {job_h, job_i}
+    if got_leaves != expected_leaves:
+        print("WARNING: Unexpected leaves:", got_leaves, "expected:", expected_leaves, file=sys.stderr)
+
+    # Check edges reflect the expanded DAG
+    expected_edges = [
+        (job_a, job_c), (job_b, job_c),
+        (job_a, job_d), (job_b, job_e),
+        (job_c, job_f), (job_d, job_f),
+        (job_c, job_g), (job_e, job_g),
+        (job_f, job_h), (job_g, job_h),
+        (job_f, job_i), (job_g, job_i),
+    ]
+    try:
+        assert_edges(dag.get("edges", []), expected_edges)
+        print("DAG edges contain expected dependencies:", expected_edges)
+    except AssertionError as e:
+        print("WARNING:", e, file=sys.stderr)
+
+if __name__ == "__main__":
+    try:
+        main()
+    except Exception as e:
+        print_header("Error")
+        print(str(e))
+        sys.exit(1)

specs/openrpc.json

@@ -20,7 +20,7 @@
   "methods": [
     {
       "name": "actor.create",
-      "summary": "Create/Upsert Actor in a context",
+      "summary": "Create/Upsert Actor",
       "params": [
         {
           "name": "params",
@@ -49,7 +49,7 @@
     },
     {
       "name": "actor.load",
-      "summary": "Load an Actor by id from a context",
+      "summary": "Load an Actor by id",
       "params": [
         {
           "name": "params",
@@ -438,6 +438,16 @@
           "Processed"
         ]
       },
+      "TransportStatus": {
+        "type": "string",
+        "enum": [
+          "Queued",
+          "Sent",
+          "Delivered",
+          "Read",
+          "Failed"
+        ]
+      },
       "MessageType": {
         "type": "string",
         "enum": [
@@ -779,6 +789,12 @@
           },
           "status": {
             "$ref": "#/components/schemas/MessageStatus"
+          },
+          "transport_id": {
+            "type": "string"
+          },
+          "transport_status": {
+            "$ref": "#/components/schemas/TransportStatus"
           }
         }
       },
@@ -1165,14 +1181,9 @@
       "ActorCreateParams": {
         "type": "object",
         "required": [
-          "context_id",
           "actor"
         ],
         "properties": {
-          "context_id": {
-            "type": "integer",
-            "format": "uint32"
-          },
           "actor": {
             "$ref": "#/components/schemas/ActorCreate"
           }
@@ -1181,14 +1192,9 @@
       "ActorLoadParams": {
         "type": "object",
         "required": [
-          "context_id",
           "id"
         ],
         "properties": {
-          "context_id": {
-            "type": "integer",
-            "format": "uint32"
-          },
           "id": {
             "type": "integer",
             "format": "uint32"

specs/specs.md

@@ -10,7 +10,7 @@
 | **Runner** | Public key, Mycelium address, topic name, type (`v\|python\|osis\|rust`), local flag, timestamps                                                                                                                                          | `runner:<id>` (hash)                      | The *worker* that actually executes **RunnerJob** scripts. It subscribes to a Mycelium topic (normally `runner<id>`). If `local == true` the runner also consumes jobs directly from a Redis queue that is named after the script‑type suffix (`v`, `python`, …).                                                                                                                                                                                                                                                                                                                                 |
 | **RunnerJob**| Script source, type (`osis\|sal\|v\|python`), env‑vars, prerequisites, dependencies, status, timestamps, result map                                                                                                                       | `job:<caller_id>:<id>` (hash)             | A single executable unit. It lives inside a **Context**, belongs to a **Runner**, and is queued according to its `script_type` (e.g. `queue:python`). Its status moves through the lifecycle `dispatched → waiting_for_prerequisites → started → finished|error`.                                                                                                                                                                                                                                                                                                                                 |
 
-> **Key idea:** All objects are persisted as *hashes* in a **Redis** database that is dedicated to a *Context*. The system is completely **decentralised** – each actor owns its own context and can spin up as many runners as needed. Communication between actors, runners and the rest of the system happens over **Mycelium**, a message‑bus that uses Redis lists as queues.
+> **Key idea:** All objects are persisted as *hashes*. Context‑scoped objects (**Context**, **Flow**, **Message**, **Runner**, **RunnerJob**) live in a **Redis** database dedicated to that context. **Actors are global** and are stored in Redis DB 0 under `actor:<id>`. The system is completely **decentralised** – each actor owns its own context and can spin up as many runners as needed. Communication between actors, runners and the rest of the system happens over **Mycelium**, a message‑bus that uses Redis lists as queues.
 
 ---
 

src/clients/mod.rs

@@ -0,0 +1,7 @@
+pub mod mycelium_client;
+pub mod supervisor_client;
+pub mod types;
+
+pub use mycelium_client::{MyceliumClient, MyceliumClientError};
+pub use supervisor_client::{SupervisorClient, SupervisorClientError};
+pub use types::Destination;

src/clients/mycelium_client.rs

@@ -0,0 +1,238 @@
+use std::sync::Arc;
+use std::sync::atomic::{AtomicU64, Ordering};
+
+use reqwest::Client as HttpClient;
+
+use serde_json::{Value, json};
+use thiserror::Error;
+
+use crate::clients::Destination;
+use crate::models::TransportStatus;
+
+/// Lightweight client for Mycelium JSON-RPC (send + query status)
+#[derive(Clone)]
+pub struct MyceliumClient {
+    base_url: String, // e.g. http://127.0.0.1:8990
+    http: HttpClient,
+    id_counter: Arc<AtomicU64>,
+}
+
+#[derive(Debug, Error)]
+pub enum MyceliumClientError {
+    #[error("HTTP error: {0}")]
+    Http(#[from] reqwest::Error),
+    #[error("JSON error: {0}")]
+    Json(#[from] serde_json::Error),
+    #[error("Transport timed out waiting for a reply (408)")]
+    TransportTimeout,
+    #[error("JSON-RPC error: {0}")]
+    RpcError(String),
+    #[error("Invalid response: {0}")]
+    InvalidResponse(String),
+}
+
+impl MyceliumClient {
+    pub fn new(base_url: impl Into<String>) -> Result<Self, MyceliumClientError> {
+        let url = base_url.into();
+        let http = HttpClient::builder().build()?;
+        Ok(Self {
+            base_url: url,
+            http,
+            id_counter: Arc::new(AtomicU64::new(1)),
+        })
+    }
+
+    fn next_id(&self) -> u64 {
+        self.id_counter.fetch_add(1, Ordering::Relaxed)
+    }
+
+    async fn jsonrpc(&self, method: &str, params: Value) -> Result<Value, MyceliumClientError> {
+        let req = json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": method,
+            "params": [ params ]
+        });
+        let resp = self.http.post(&self.base_url).json(&req).send().await?;
+        let status = resp.status();
+        let body: Value = resp.json().await?;
+        if let Some(err) = body.get("error") {
+            let code = err.get("code").and_then(|v| v.as_i64()).unwrap_or(0);
+            let msg = err
+                .get("message")
+                .and_then(|v| v.as_str())
+                .unwrap_or("unknown error");
+            if code == 408 {
+                return Err(MyceliumClientError::TransportTimeout);
+            }
+            return Err(MyceliumClientError::RpcError(format!(
+                "code={code} msg={msg}"
+            )));
+        }
+        if !status.is_success() {
+            return Err(MyceliumClientError::RpcError(format!(
+                "HTTP {status}, body {body}"
+            )));
+        }
+        Ok(body)
+    }
+
+    /// Call messageStatus with an outbound message id (hex string)
+    pub async fn message_status(
+        &self,
+        id_hex: &str,
+    ) -> Result<TransportStatus, MyceliumClientError> {
+        let params = json!({ "id": id_hex });
+        let body = self.jsonrpc("messageStatus", params).await?;
+        let result = body.get("result").ok_or_else(|| {
+            MyceliumClientError::InvalidResponse(format!("missing result in response: {body}"))
+        })?;
+        // Accept both { status: "..."} and bare "..."
+        let status_str = if let Some(s) = result.get("status").and_then(|v| v.as_str()) {
+            s.to_string()
+        } else if let Some(s) = result.as_str() {
+            s.to_string()
+        } else {
+            return Err(MyceliumClientError::InvalidResponse(format!(
+                "unexpected result shape: {result}"
+            )));
+        };
+        Self::map_status(&status_str).ok_or_else(|| {
+            MyceliumClientError::InvalidResponse(format!("unknown status: {status_str}"))
+        })
+    }
+
+    fn map_status(s: &str) -> Option<TransportStatus> {
+        match s {
+            "queued" => Some(TransportStatus::Queued),
+            "sent" => Some(TransportStatus::Sent),
+            "delivered" => Some(TransportStatus::Delivered),
+            "read" => Some(TransportStatus::Read),
+            "failed" => Some(TransportStatus::Failed),
+            _ => None,
+        }
+    }
+
+    /// Build params object for pushMessage without performing any network call.
+    /// Exposed for serializer-only tests and reuse.
+    pub(crate) fn build_push_params(
+        dst: &Destination,
+        topic: &str,
+        payload_b64: &str,
+        reply_timeout: Option<u64>,
+    ) -> Value {
+        let dst_v = match dst {
+            Destination::Ip(ip) => json!({ "ip": ip.to_string() }),
+            Destination::Pk(pk) => json!({ "pk": pk }),
+        };
+        let message = json!({
+            "dst": dst_v,
+            "topic": topic,
+            "payload": payload_b64,
+        });
+        let mut params = json!({ "message": message });
+        if let Some(rt) = reply_timeout {
+            params["reply_timeout"] = json!(rt);
+        }
+        params
+    }
+
+    /// pushMessage: send a message with dst/topic/payload. Optional reply_timeout for sync replies.
+    pub async fn push_message(
+        &self,
+        dst: &Destination,
+        topic: &str,
+        payload_b64: &str,
+        reply_timeout: Option<u64>,
+    ) -> Result<Value, MyceliumClientError> {
+        let params = Self::build_push_params(dst, topic, payload_b64, reply_timeout);
+        let body = self.jsonrpc("pushMessage", params).await?;
+        let result = body.get("result").ok_or_else(|| {
+            MyceliumClientError::InvalidResponse(format!("missing result in response: {body}"))
+        })?;
+        Ok(result.clone())
+    }
+
+    /// Helper to extract outbound message id from pushMessage result (InboundMessage or PushMessageResponseId)
+    pub fn extract_message_id_from_result(result: &Value) -> Option<String> {
+        result
+            .get("id")
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::clients::Destination;
+
+    #[test]
+    fn build_push_params_shapes_ip_pk_and_timeout() {
+        // IP destination
+        let p1 = MyceliumClient::build_push_params(
+            &Destination::Ip("2001:db8::1".parse().unwrap()),
+            "supervisor.rpc",
+            "Zm9vYmFy", // "foobar"
+            Some(10),
+        );
+        let msg1 = p1.get("message").unwrap();
+        assert_eq!(
+            msg1.get("topic").unwrap().as_str().unwrap(),
+            "supervisor.rpc"
+        );
+        assert_eq!(msg1.get("payload").unwrap().as_str().unwrap(), "Zm9vYmFy");
+        assert_eq!(
+            msg1.get("dst")
+                .unwrap()
+                .get("ip")
+                .unwrap()
+                .as_str()
+                .unwrap(),
+            "2001:db8::1"
+        );
+        assert_eq!(p1.get("reply_timeout").unwrap().as_u64().unwrap(), 10);
+
+        // PK destination without timeout
+        let p2 = MyceliumClient::build_push_params(
+            &Destination::Pk(
+                "bb39b4a3a4efd70f3e05e37887677e02efbda14681d0acd3882bc0f754792c32".into(),
+            ),
+            "supervisor.rpc",
+            "YmF6", // "baz"
+            None,
+        );
+        let msg2 = p2.get("message").unwrap();
+        assert_eq!(
+            msg2.get("dst")
+                .unwrap()
+                .get("pk")
+                .unwrap()
+                .as_str()
+                .unwrap(),
+            "bb39b4a3a4efd70f3e05e37887677e02efbda14681d0acd3882bc0f754792c32"
+        );
+        assert!(p2.get("reply_timeout").is_none());
+    }
+
+    #[test]
+    fn extract_message_id_variants() {
+        // PushMessageResponseId
+        let r1 = json!({"id":"0123456789abcdef"});
+        assert_eq!(
+            MyceliumClient::extract_message_id_from_result(&r1).unwrap(),
+            "0123456789abcdef"
+        );
+
+        // InboundMessage-like
+        let r2 = json!({
+            "id":"fedcba9876543210",
+            "srcIp":"449:abcd:0123:defa::1",
+            "payload":"hpV+"
+        });
+        assert_eq!(
+            MyceliumClient::extract_message_id_from_result(&r2).unwrap(),
+            "fedcba9876543210"
+        );
+    }
+}

src/clients/supervisor_client.rs

@@ -0,0 +1,497 @@
+use std::sync::Arc;
+use std::sync::atomic::{AtomicU64, Ordering};
+
+use base64::Engine;
+use base64::engine::general_purpose::STANDARD as BASE64_STANDARD;
+use serde_json::{Value, json};
+use thiserror::Error;
+
+use crate::clients::{Destination, MyceliumClient, MyceliumClientError};
+
+#[derive(Clone)]
+pub struct SupervisorClient {
+    mycelium: Arc<MyceliumClient>, // Delegated Mycelium transport
+    destination: Destination,      // ip or pk
+    topic: String,                 // e.g. "supervisor.rpc"
+    secret: Option<String>,        // optional, required by several supervisor methods
+    id_counter: Arc<AtomicU64>,    // JSON-RPC id generator (for inner supervisor requests)
+}
+
+#[derive(Debug, Error)]
+pub enum SupervisorClientError {
+    #[error("HTTP error: {0}")]
+    Http(#[from] reqwest::Error),
+    #[error("JSON error: {0}")]
+    Json(#[from] serde_json::Error),
+    #[error("Transport timed out waiting for a reply (408)")]
+    TransportTimeout,
+    #[error("JSON-RPC error: {0}")]
+    RpcError(String),
+    #[error("Invalid response: {0}")]
+    InvalidResponse(String),
+    #[error("Missing secret for method requiring authentication")]
+    MissingSecret,
+}
+
+impl From<MyceliumClientError> for SupervisorClientError {
+    fn from(e: MyceliumClientError) -> Self {
+        match e {
+            MyceliumClientError::TransportTimeout => SupervisorClientError::TransportTimeout,
+            MyceliumClientError::RpcError(m) => SupervisorClientError::RpcError(m),
+            MyceliumClientError::InvalidResponse(m) => SupervisorClientError::InvalidResponse(m),
+            MyceliumClientError::Http(err) => SupervisorClientError::Http(err),
+            MyceliumClientError::Json(err) => SupervisorClientError::Json(err),
+        }
+    }
+}
+
+impl SupervisorClient {
+    /// Preferred constructor: provide a shared Mycelium client.
+    pub fn new_with_client(
+        mycelium: Arc<MyceliumClient>,
+        destination: Destination,
+        topic: impl Into<String>,
+        secret: Option<String>,
+    ) -> Self {
+        Self {
+            mycelium,
+            destination,
+            topic: topic.into(),
+            secret,
+            id_counter: Arc::new(AtomicU64::new(1)),
+        }
+    }
+
+    /// Backward-compatible constructor that builds a Mycelium client from base_url.
+    /// base_url defaults to Mycelium spec "http://127.0.0.1:8990" if empty.
+    pub fn new(
+        base_url: impl Into<String>,
+        destination: Destination,
+        topic: impl Into<String>,
+        secret: Option<String>,
+    ) -> Result<Self, SupervisorClientError> {
+        let mut url = base_url.into();
+        if url.is_empty() {
+            url = "http://127.0.0.1:8990".to_string();
+        }
+        let mycelium = Arc::new(MyceliumClient::new(url)?);
+        Ok(Self::new_with_client(mycelium, destination, topic, secret))
+    }
+
+    fn next_id(&self) -> u64 {
+        self.id_counter.fetch_add(1, Ordering::Relaxed)
+    }
+
+    /// Internal helper used by tests to inspect dst JSON shape.
+    fn build_dst(&self) -> Value {
+        match &self.destination {
+            Destination::Ip(ip) => json!({ "ip": ip.to_string() }),
+            Destination::Pk(pk) => json!({ "pk": pk }),
+        }
+    }
+
+    fn build_supervisor_payload(&self, method: &str, params: Value) -> Value {
+        json!({
+            "jsonrpc": "2.0",
+            "id": self.next_id(),
+            "method": method,
+            "params": params,
+        })
+    }
+
+    fn encode_payload(payload: &Value) -> Result<String, SupervisorClientError> {
+        let s = serde_json::to_string(payload)?;
+        Ok(BASE64_STANDARD.encode(s.as_bytes()))
+    }
+
+    fn extract_message_id_from_result(result: &Value) -> Option<String> {
+        // Two possibilities per Mycelium spec oneOf:
+        // - PushMessageResponseId: { "id": "0123456789abcdef" }
+        // - InboundMessage: object containing "id" plus srcIp, ...; we still return id.
+        result
+            .get("id")
+            .and_then(|v| v.as_str())
+            .map(|s| s.to_string())
+    }
+
+    /// Generic call: build supervisor JSON-RPC message, send via Mycelium pushMessage, return outbound message id (hex).
+    pub async fn call(&self, method: &str, params: Value) -> Result<String, SupervisorClientError> {
+        let inner = self.build_supervisor_payload(method, params);
+        let payload_b64 = Self::encode_payload(&inner)?;
+        let result = self
+            .mycelium
+            .push_message(&self.destination, &self.topic, &payload_b64, None)
+            .await?;
+
+        if let Some(id) = MyceliumClient::extract_message_id_from_result(&result) {
+            return Ok(id);
+        }
+        // Some servers might return the oneOf wrapped, handle len==1 array defensively (not in spec but resilient)
+        if let Some(arr) = result.as_array()
+            && arr.len() == 1
+            && let Some(id) = MyceliumClient::extract_message_id_from_result(&arr[0])
+        {
+            return Ok(id);
+        }
+        Err(SupervisorClientError::InvalidResponse(format!(
+            "result did not contain message id: {result}"
+        )))
+    }
+
+    /// Synchronous variant: wait for a JSON-RPC reply via Mycelium reply_timeout, and return the inner JSON-RPC "result".
+    /// If the supervisor returns an error object, map to RpcError.
+    pub async fn call_sync(
+        &self,
+        method: &str,
+        params: Value,
+        reply_timeout_secs: u64,
+    ) -> Result<Value, SupervisorClientError> {
+        let inner = self.build_supervisor_payload(method, params);
+        let payload_b64 = Self::encode_payload(&inner)?;
+
+        let result = self
+            .mycelium
+            .push_message(
+                &self.destination,
+                &self.topic,
+                &payload_b64,
+                Some(reply_timeout_secs),
+            )
+            .await?;
+
+        // Expect an InboundMessage-like with a base64 payload containing the supervisor JSON-RPC response
+        let payload_field = if let Some(p) = result.get("payload").and_then(|v| v.as_str()) {
+            p.to_string()
+        } else if let Some(arr) = result.as_array() {
+            // Defensive: handle single-element array shape
+            if let Some(one) = arr.get(0) {
+                one.get("payload")
+                    .and_then(|v| v.as_str())
+                    .map(|s| s.to_string())
+                    .ok_or_else(|| {
+                        SupervisorClientError::InvalidResponse(format!(
+                            "missing payload in result: {result}"
+                        ))
+                    })?
+            } else {
+                return Err(SupervisorClientError::TransportTimeout);
+            }
+        } else {
+            // No payload => no reply received within timeout (Mycelium would have returned just an id)
+            return Err(SupervisorClientError::TransportTimeout);
+        };
+
+        let raw = BASE64_STANDARD
+            .decode(payload_field.as_bytes())
+            .map_err(|e| {
+                SupervisorClientError::InvalidResponse(format!("invalid base64 payload: {e}"))
+            })?;
+        let rpc_resp: Value = serde_json::from_slice(&raw)?;
+
+        if let Some(err) = rpc_resp.get("error") {
+            return Err(SupervisorClientError::RpcError(err.to_string()));
+        }
+        let res = rpc_resp.get("result").ok_or_else(|| {
+            SupervisorClientError::InvalidResponse(format!(
+                "missing result in supervisor reply: {rpc_resp}"
+            ))
+        })?;
+        Ok(res.clone())
+    }
+
+    fn need_secret(&self) -> Result<&str, SupervisorClientError> {
+        self.secret
+            .as_deref()
+            .ok_or(SupervisorClientError::MissingSecret)
+    }
+
+    // -----------------------------
+    // Typed wrappers for Supervisor API
+    // Asynchronous-only: returns outbound message id
+    // -----------------------------
+
+    // Runners
+    pub async fn list_runners(&self) -> Result<String, SupervisorClientError> {
+        self.call("list_runners", json!([])).await
+    }
+
+    pub async fn register_runner(
+        &self,
+        name: impl Into<String>,
+        queue: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "name": name.into(),
+            "queue": queue.into()
+        }]);
+        self.call("register_runner", params).await
+    }
+
+    pub async fn remove_runner(
+        &self,
+        actor_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("remove_runner", json!([actor_id.into()])).await
+    }
+
+    pub async fn start_runner(
+        &self,
+        actor_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("start_runner", json!([actor_id.into()])).await
+    }
+
+    pub async fn stop_runner(
+        &self,
+        actor_id: impl Into<String>,
+        force: bool,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("stop_runner", json!([actor_id.into(), force]))
+            .await
+    }
+
+    pub async fn get_runner_status(
+        &self,
+        actor_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("get_runner_status", json!([actor_id.into()]))
+            .await
+    }
+
+    pub async fn get_all_runner_status(&self) -> Result<String, SupervisorClientError> {
+        self.call("get_all_runner_status", json!([])).await
+    }
+
+    pub async fn start_all(&self) -> Result<String, SupervisorClientError> {
+        self.call("start_all", json!([])).await
+    }
+
+    pub async fn stop_all(&self, force: bool) -> Result<String, SupervisorClientError> {
+        self.call("stop_all", json!([force])).await
+    }
+
+    pub async fn get_all_status(&self) -> Result<String, SupervisorClientError> {
+        self.call("get_all_status", json!([])).await
+    }
+
+    // Jobs
+    pub async fn jobs_create(&self, job: Value) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "job": job
+        }]);
+        self.call("jobs.create", params).await
+    }
+
+    pub async fn jobs_list(&self) -> Result<String, SupervisorClientError> {
+        self.call("jobs.list", json!([])).await
+    }
+
+    pub async fn job_run(&self, job: Value) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "job": job
+        }]);
+        self.call("job.run", params).await
+    }
+
+    pub async fn job_start(
+        &self,
+        job_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "job_id": job_id.into()
+        }]);
+        self.call("job.start", params).await
+    }
+
+    pub async fn job_status(
+        &self,
+        job_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("job.status", json!([job_id.into()])).await
+    }
+
+    /// Synchronous job.status: waits for the supervisor to reply and returns the status string.
+    /// The supervisor result may be an object with { status: "..." } or a bare string.
+    pub async fn job_status_sync(
+        &self,
+        job_id: impl Into<String>,
+        reply_timeout_secs: u64,
+    ) -> Result<String, SupervisorClientError> {
+        let res = self
+            .call_sync("job.status", json!([job_id.into()]), reply_timeout_secs)
+            .await?;
+        let status = if let Some(s) = res.get("status").and_then(|v| v.as_str()) {
+            s.to_string()
+        } else if let Some(s) = res.as_str() {
+            s.to_string()
+        } else {
+            return Err(SupervisorClientError::InvalidResponse(format!(
+                "unexpected job.status result shape: {res}"
+            )));
+        };
+        Ok(status)
+    }
+
+    pub async fn job_result(
+        &self,
+        job_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        self.call("job.result", json!([job_id.into()])).await
+    }
+
+    /// Synchronous job.result: waits for the supervisor to reply and returns a map
+    /// containing exactly one of:
+    /// - {"success": "..."} on success
+    /// - {"error": "..."} on error reported by the runner
+    /// Some servers may return a bare string; we treat that as {"success": "<string>"}.
+    pub async fn job_result_sync(
+        &self,
+        job_id: impl Into<String>,
+        reply_timeout_secs: u64,
+    ) -> Result<std::collections::HashMap<String, String>, SupervisorClientError> {
+        let res = self
+            .call_sync("job.result", json!([job_id.into()]), reply_timeout_secs)
+            .await?;
+
+        use std::collections::HashMap;
+        let mut out: HashMap<String, String> = HashMap::new();
+
+        if let Some(obj) = res.as_object() {
+            if let Some(s) = obj.get("success").and_then(|v| v.as_str()) {
+                out.insert("success".to_string(), s.to_string());
+                return Ok(out);
+            }
+            if let Some(s) = obj.get("error").and_then(|v| v.as_str()) {
+                out.insert("error".to_string(), s.to_string());
+                return Ok(out);
+            }
+            return Err(SupervisorClientError::InvalidResponse(format!(
+                "unexpected job.result result shape: {res}"
+            )));
+        } else if let Some(s) = res.as_str() {
+            out.insert("success".to_string(), s.to_string());
+            return Ok(out);
+        }
+
+        Err(SupervisorClientError::InvalidResponse(format!(
+            "unexpected job.result result shape: {res}"
+        )))
+    }
+
+    pub async fn job_stop(
+        &self,
+        job_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "job_id": job_id.into()
+        }]);
+        self.call("job.stop", params).await
+    }
+
+    pub async fn job_delete(
+        &self,
+        job_id: impl Into<String>,
+    ) -> Result<String, SupervisorClientError> {
+        let secret = self.need_secret()?;
+        let params = json!([{
+            "secret": secret,
+            "job_id": job_id.into()
+        }]);
+        self.call("job.delete", params).await
+    }
+
+    // Discovery
+    pub async fn rpc_discover(&self) -> Result<String, SupervisorClientError> {
+        self.call("rpc.discover", json!([])).await
+    }
+}
+
+// -----------------------------
+// Tests (serialization-only)
+// -----------------------------
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use std::net::IpAddr;
+
+    fn mk_client() -> SupervisorClient {
+        // Uses the legacy constructor but will not issue real network calls in these tests.
+        SupervisorClient::new(
+            "http://127.0.0.1:8990",
+            Destination::Pk(
+                "bb39b4a3a4efd70f3e05e37887677e02efbda14681d0acd3882bc0f754792c32".to_string(),
+            ),
+            "supervisor.rpc",
+            Some("secret".to_string()),
+        )
+        .unwrap()
+    }
+
+    #[test]
+    fn builds_dst_ip_and_pk() {
+        let c_ip = SupervisorClient::new(
+            "http://127.0.0.1:8990",
+            Destination::Ip("2001:db8::1".parse().unwrap()),
+            "supervisor.rpc",
+            None,
+        )
+        .unwrap();
+        let v_ip = c_ip.build_dst();
+        assert_eq!(v_ip.get("ip").unwrap().as_str().unwrap(), "2001:db8::1");
+
+        let c_pk = mk_client();
+        let v_pk = c_pk.build_dst();
+        assert_eq!(
+            v_pk.get("pk").unwrap().as_str().unwrap(),
+            "bb39b4a3a4efd70f3e05e37887677e02efbda14681d0acd3882bc0f754792c32"
+        );
+    }
+
+    #[test]
+    fn encodes_supervisor_payload_b64() {
+        let c = mk_client();
+        let payload = c.build_supervisor_payload("list_runners", json!([]));
+        let b64 = SupervisorClient::encode_payload(&payload).unwrap();
+
+        // decode and compare round-trip JSON
+        let raw = base64::engine::general_purpose::STANDARD
+            .decode(b64.as_bytes())
+            .unwrap();
+        let decoded: Value = serde_json::from_slice(&raw).unwrap();
+        assert_eq!(
+            decoded.get("method").unwrap().as_str().unwrap(),
+            "list_runners"
+        );
+        assert_eq!(decoded.get("jsonrpc").unwrap().as_str().unwrap(), "2.0");
+    }
+
+    #[test]
+    fn extract_message_id_works_for_both_variants() {
+        // PushMessageResponseId
+        let r1 = json!({"id":"0123456789abcdef"});
+        assert_eq!(
+            SupervisorClient::extract_message_id_from_result(&r1).unwrap(),
+            "0123456789abcdef"
+        );
+        // InboundMessage-like
+        let r2 = json!({
+            "id":"fedcba9876543210",
+            "srcIp":"449:abcd:0123:defa::1",
+            "payload":"hpV+"
+        });
+        assert_eq!(
+            SupervisorClient::extract_message_id_from_result(&r2).unwrap(),
+            "fedcba9876543210"
+        );
+    }
+}

src/clients/types.rs

@@ -0,0 +1,9 @@
+use std::net::IpAddr;
+
+/// Destination for Mycelium messages (shared by clients)
+#[derive(Clone, Debug)]
+pub enum Destination {
+    Ip(IpAddr),
+    /// 64-hex public key of the receiver node
+    Pk(String),
+}

src/dag.rs

@@ -14,6 +14,10 @@ pub enum DagError {
     Storage(Box<dyn std::error::Error + Send + Sync>),
     MissingDependency { job: u32, depends_on: u32 },
     CycleDetected { remaining: Vec<u32> },
+    UnknownJob { job: u32 },
+    DependenciesIncomplete { job: u32, missing: Vec<u32> },
+    FlowFailed { failed_job: u32 },
+    JobNotStarted { job: u32 },
 }
 
 impl fmt::Display for DagError {
@@ -28,6 +32,20 @@ impl fmt::Display for DagError {
             DagError::CycleDetected { remaining } => {
                 write!(f, "Cycle detected; unresolved nodes: {:?}", remaining)
             }
+            DagError::UnknownJob { job } => write!(f, "Unknown job id: {}", job),
+            DagError::DependenciesIncomplete { job, missing } => write!(
+                f,
+                "Job {} cannot start; missing completed deps: {:?}",
+                job, missing
+            ),
+            DagError::FlowFailed { failed_job } => {
+                write!(f, "Flow failed due to job {}", failed_job)
+            }
+            DagError::JobNotStarted { job } => write!(
+                f,
+                "Job {} cannot be completed because it is not marked as started",
+                job
+            ),
         }
     }
 }
@@ -59,6 +77,10 @@ pub struct FlowDag {
     pub roots: Vec<u32>,                // in_degree == 0
     pub leaves: Vec<u32>,               // out_degree == 0
     pub levels: Vec<Vec<u32>>,          // topological layers for parallel execution
+    // Runtime execution state
+    pub started: HashSet<u32>,
+    pub completed: HashSet<u32>,
+    pub failed_job: Option<u32>,
 }
 
 pub async fn build_flow_dag(
@@ -72,14 +94,14 @@ pub async fn build_flow_dag(
         .await
         .map_err(DagError::from)?;
     let caller_id = flow.caller_id();
-    let flow_job_ids = flow.jobs().clone();
+    let flow_job_ids = flow.jobs();
 
     // Build a set for faster membership tests
     let job_id_set: HashSet<u32> = flow_job_ids.iter().copied().collect();
 
     // Load all jobs
     let mut jobs: HashMap<u32, Job> = HashMap::with_capacity(flow_job_ids.len());
-    for jid in &flow_job_ids {
+    for jid in flow_job_ids {
         let job = redis
             .load_job(context_id, caller_id, *jid)
             .await
@@ -94,7 +116,7 @@ pub async fn build_flow_dag(
     let mut rev_adj: HashMap<u32, Vec<u32>> = HashMap::with_capacity(jobs.len());
     let mut in_degree: HashMap<u32, usize> = HashMap::with_capacity(jobs.len());
 
-    for &jid in &flow_job_ids {
+    for &jid in flow_job_ids {
         adj.entry(jid).or_default();
         rev_adj.entry(jid).or_default();
         in_degree.entry(jid).or_insert(0);
@@ -200,8 +222,125 @@ pub async fn build_flow_dag(
         roots,
         leaves,
         levels,
+        started: HashSet::new(),
+        completed: HashSet::new(),
+        failed_job: None,
     };
 
     Ok(dag)
 }
 
+impl FlowDag {
+    /// Return all jobs that are ready to be processed.
+    /// A job is ready if:
+    /// - it exists in the DAG
+    /// - it is not already started or completed
+    /// - it has no dependencies, or all dependencies are completed
+    ///
+    /// If any job has failed, the entire flow is considered failed and an error is returned.
+    pub fn ready_jobs(&self) -> DagResult<Vec<u32>> {
+        if let Some(failed_job) = self.failed_job {
+            return Err(DagError::FlowFailed { failed_job });
+        }
+
+        let mut ready: Vec<u32> = Vec::new();
+        for (&jid, summary) in &self.nodes {
+            if self.completed.contains(&jid) || self.started.contains(&jid) {
+                continue;
+            }
+            let mut deps_ok = true;
+            for dep in &summary.depends {
+                if !self.completed.contains(dep) {
+                    deps_ok = false;
+                    break;
+                }
+            }
+            if deps_ok {
+                ready.push(jid);
+            }
+        }
+        ready.sort_unstable();
+        Ok(ready)
+    }
+
+    /// Mark a job as started.
+    /// Strict validation rules:
+    /// - Unknown jobs are rejected with UnknownJob
+    /// - If the flow has already failed, return FlowFailed
+    /// - If the job is already started or completed, this is a no-op (idempotent)
+    /// - If any dependency is not completed, return DependenciesIncomplete with the missing deps
+    pub fn mark_job_started(&mut self, job: u32) -> DagResult<()> {
+        if !self.nodes.contains_key(&job) {
+            return Err(DagError::UnknownJob { job });
+        }
+        if self.completed.contains(&job) || self.started.contains(&job) {
+            return Ok(());
+        }
+        if let Some(failed_job) = self.failed_job {
+            return Err(DagError::FlowFailed { failed_job });
+        }
+
+        let summary = self.nodes.get(&job).expect("checked contains_key");
+        let missing: Vec<u32> = summary
+            .depends
+            .iter()
+            .copied()
+            .filter(|d| !self.completed.contains(d))
+            .collect();
+
+        if !missing.is_empty() {
+            return Err(DagError::DependenciesIncomplete { job, missing });
+        }
+
+        self.started.insert(job);
+        Ok(())
+    }
+
+    /// Mark a job as completed.
+    /// Strict validation rules:
+    /// - Unknown jobs are rejected with UnknownJob
+    /// - If the job is already completed, this is a no-op (idempotent)
+    /// - If the flow has already failed, return FlowFailed
+    /// - If the job was not previously started, return JobNotStarted
+    pub fn mark_job_completed(&mut self, job: u32) -> DagResult<()> {
+        if !self.nodes.contains_key(&job) {
+            return Err(DagError::UnknownJob { job });
+        }
+        if self.completed.contains(&job) {
+            return Ok(());
+        }
+        if let Some(failed_job) = self.failed_job {
+            return Err(DagError::FlowFailed { failed_job });
+        }
+        if !self.started.contains(&job) {
+            return Err(DagError::JobNotStarted { job });
+        }
+
+        self.started.remove(&job);
+        self.completed.insert(job);
+        Ok(())
+    }
+
+    /// Mark a job as failed.
+    /// Behavior:
+    /// - Unknown jobs are rejected with UnknownJob
+    /// - If a failure is already recorded:
+    ///     - If it is the same job, no-op (idempotent)
+    ///     - If it is a different job, return FlowFailed with the already-failed job
+    /// - Otherwise record this job as the failed job
+    pub fn mark_job_failed(&mut self, job: u32) -> DagResult<()> {
+        if !self.nodes.contains_key(&job) {
+            return Err(DagError::UnknownJob { job });
+        }
+        match self.failed_job {
+            Some(existing) if existing == job => Ok(()),
+            Some(existing) => Err(DagError::FlowFailed {
+                failed_job: existing,
+            }),
+            None => {
+                self.failed_job = Some(job);
+                Ok(())
+            }
+        }
+    }
+}

src/lib.rs

@@ -1,5 +1,8 @@
+pub mod clients;
+pub mod dag;
 pub mod models;
+pub mod router;
+pub mod rpc;
+pub mod service;
 pub mod storage;
 mod time;
-pub mod dag;
-pub mod rpc;

src/main.rs

@@ -2,6 +2,8 @@ use clap::Parser;
 use std::net::{IpAddr, SocketAddr};
 use std::sync::Arc;
 
+use tracing::{error, info, warn};
+use tracing_subscriber::{EnvFilter, fmt};
 #[derive(Debug, Clone, Parser)]
 #[command(
     name = "herocoordinator",
@@ -73,6 +75,14 @@ struct Cli {
 #[tokio::main]
 async fn main() {
     let cli = Cli::parse();
+    // Initialize tracing subscriber (pretty formatter; controlled by RUST_LOG)
+    let filter = EnvFilter::try_from_default_env().unwrap_or_else(|_| EnvFilter::new("info"));
+    tracing_subscriber::fmt()
+        .with_env_filter(filter)
+        .pretty()
+        .with_target(true)
+        .with_level(true)
+        .init();
 
     let http_addr = SocketAddr::new(cli.api_http_ip, cli.api_http_port);
     let ws_addr = SocketAddr::new(cli.api_ws_ip, cli.api_ws_port);
@@ -82,17 +92,32 @@ async fn main() {
         .await
         .expect("Failed to connect to Redis");
 
+    // Initialize Service
+    let service = herocoordinator::service::AppService::new(redis);
+    let service_for_router = service.clone();
+
     // Shared application state
-    let state = Arc::new(herocoordinator::rpc::AppState::new(redis));
+    let state = Arc::new(herocoordinator::rpc::AppState::new(service));
+
+    // Start router workers (auto-discovered contexts)
+    {
+        let base_url = format!("http://{}:{}", cli.mycelium_ip, cli.mycelium_port);
+        let cfg = herocoordinator::router::RouterConfig {
+            context_ids: Vec::new(), // ignored by start_router_auto
+            concurrency: 32,
+            base_url,
+            topic: "supervisor.rpc".to_string(),
+            transport_poll_interval_secs: 2,
+            transport_poll_timeout_secs: 300,
+        };
+        let _auto_handle = herocoordinator::router::start_router_auto(service_for_router, cfg);
+    }
 
     // Build RPC modules for both servers
     let http_module = herocoordinator::rpc::build_module(state.clone());
     let ws_module = herocoordinator::rpc::build_module(state.clone());
 
-    println!(
-        "Starting JSON-RPC servers: HTTP http://{} | WS ws://{} | redis_addr={}",
-        http_addr, ws_addr, cli.redis_addr
-    );
+    info!(%http_addr, %ws_addr, redis_addr=%cli.redis_addr, "Starting JSON-RPC servers");
 
     // Start servers
     let _http_handle = herocoordinator::rpc::start_http(http_addr, http_module)
@@ -104,7 +129,7 @@ async fn main() {
 
     // Wait for Ctrl+C to terminate
     if let Err(e) = tokio::signal::ctrl_c().await {
-        eprintln!("Failed to listen for shutdown signal: {e}");
+        error!(error=%e, "Failed to listen for shutdown signal");
     }
-    println!("Shutdown signal received, exiting.");
+    info!("Shutdown signal received, exiting.");
 }

src/models.rs

@@ -8,8 +8,8 @@ mod script_type;
 
 pub use actor::Actor;
 pub use context::Context;
-pub use flow::Flow;
-pub use job::Job;
-pub use message::{Message, MessageFormatType, MessageStatus, MessageType};
+pub use flow::{Flow, FlowStatus};
+pub use job::{Job, JobStatus};
+pub use message::{Message, MessageFormatType, MessageStatus, MessageType, TransportStatus};
 pub use runner::Runner;
 pub use script_type::ScriptType;

src/models/context.rs

@@ -5,13 +5,13 @@ use crate::time::Timestamp;
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Context {
     /// Redis DB to use
-    id: u32,
+    pub id: u32,
     /// Actor ids which have admin rights on this context
-    admins: Vec<u32>,
+    pub admins: Vec<u32>,
     /// Actor ids which can read the context info
-    readers: Vec<u32>,
+    pub readers: Vec<u32>,
     /// Actor ids which can execute jobs in this context
-    executors: Vec<u32>,
-    created_at: Timestamp,
-    updated_at: Timestamp,
+    pub executors: Vec<u32>,
+    pub created_at: Timestamp,
+    pub updated_at: Timestamp,
 }

src/models/flow.rs

@@ -7,25 +7,26 @@ use crate::time::Timestamp;
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Flow {
     /// Job Id set tby the actor which created it
-    id: u32,
+    pub id: u32,
     /// Actor Id who created this job
-    caller_id: u32,
+    pub caller_id: u32,
     /// The context in which this job is executed
-    context_id: u32,
+    pub context_id: u32,
     /// List of jobs which make up the flow
-    jobs: Vec<u32>,
+    pub jobs: Vec<u32>,
     /// Environment variables, passed to every job when executed
-    env_vars: HashMap<String, String>,
+    pub env_vars: HashMap<String, String>,
     /// The result of the flow
-    result: HashMap<String, String>,
-    created_at: Timestamp,
-    updated_at: Timestamp,
-    status: FlowStatus,
+    pub result: HashMap<String, String>,
+    pub created_at: Timestamp,
+    pub updated_at: Timestamp,
+    pub status: FlowStatus,
 }
 
 /// The status of a flow
-#[derive(Serialize, Deserialize, Clone)]
+#[derive(Serialize, Deserialize, Clone, PartialEq, Eq, Debug)]
 pub enum FlowStatus {
+    Created,
     Dispatched,
     Started,
     Error,
@@ -42,7 +43,7 @@ impl Flow {
     pub fn context_id(&self) -> u32 {
         self.context_id
     }
-    pub fn jobs(&self) -> &Vec<u32> {
+    pub fn jobs(&self) -> &[u32] {
         &self.jobs
     }
 }

src/models/job.rs

@@ -7,28 +7,28 @@ use crate::{models::ScriptType, time::Timestamp};
 #[derive(Clone, Serialize, Deserialize)]
 pub struct Job {
     /// Job Id, this is given by the actor who created the job
-    id: u32,
+    pub id: u32,
     /// Actor ID which created this job
-    caller_id: u32,
+    pub caller_id: u32,
     /// Context in which the job is executed
-    context_id: u32,
-    script: String,
-    script_type: ScriptType,
+    pub context_id: u32,
+    pub script: String,
+    pub script_type: ScriptType,
     /// Timeout in seconds for this job
-    timeout: u32,
+    pub timeout: u32,
     /// Max amount of times to retry this job
-    retries: u8,
-    env_vars: HashMap<String, String>,
-    result: HashMap<String, String>,
-    prerequisites: Vec<String>,
+    pub retries: u8,
+    pub env_vars: HashMap<String, String>,
+    pub result: HashMap<String, String>,
+    pub prerequisites: Vec<String>,
     /// Ids of jobs this job depends on, i.e. this job can't start until those have finished
-    depends: Vec<u32>,
-    created_at: Timestamp,
-    updated_at: Timestamp,
-    status: JobStatus,
+    pub depends: Vec<u32>,
+    pub created_at: Timestamp,
+    pub updated_at: Timestamp,
+    pub status: JobStatus,
 }
 
-#[derive(Clone, Serialize, Deserialize)]
+#[derive(Clone, Serialize, Deserialize, PartialEq, Eq, Debug)]
 pub enum JobStatus {
     Dispatched,
     WaitingForPrerequisites,
@@ -47,13 +47,16 @@ impl Job {
     pub fn context_id(&self) -> u32 {
         self.context_id
     }
-    pub fn depends(&self) -> &Vec<u32> {
+    pub fn depends(&self) -> &[u32] {
         &self.depends
     }
-    pub fn prerequisites(&self) -> &Vec<String> {
+    pub fn prerequisites(&self) -> &[String] {
         &self.prerequisites
     }
     pub fn script_type(&self) -> ScriptType {
         self.script_type.clone()
     }
+    pub fn status(&self) -> JobStatus {
+        self.status.clone()
+    }
 }

src/models/message.rs

@@ -8,25 +8,31 @@ use crate::{
 #[derive(Clone, Serialize, Deserialize)]
 pub struct Message {
     /// Unique ID for the message, set by the caller
-    id: u32,
+    pub id: u32,
     /// Id of the actor who sent this message
-    caller_id: u32,
+    pub caller_id: u32,
     /// Id of the context in which this message was sent
-    context_id: u32,
-    message: String,
-    message_type: ScriptType,
-    message_format_type: MessageFormatType,
+    pub context_id: u32,
+    pub message: String,
+    pub message_type: ScriptType,
+    pub message_format_type: MessageFormatType,
     /// Seconds for the message to arrive at the destination
-    timeout: u32,
+    pub timeout: u32,
     /// Seconds for the receiver to acknowledge receipt of the message
-    timeout_ack: u32,
+    pub timeout_ack: u32,
     /// Seconds for the receiver to send us a reply
-    timeout_result: u32,
-    job: Vec<Job>,
-    logs: Vec<Log>,
-    created_at: Timestamp,
-    updated_at: Timestamp,
-    status: MessageStatus,
+    pub timeout_result: u32,
+
+    /// Outbound transport id returned by Mycelium on push
+    pub transport_id: Option<String>,
+    /// Latest transport status as reported by Mycelium
+    pub transport_status: Option<TransportStatus>,
+
+    pub job: Vec<Job>,
+    pub logs: Vec<Log>,
+    pub created_at: Timestamp,
+    pub updated_at: Timestamp,
+    pub status: MessageStatus,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -36,7 +42,7 @@ pub enum MessageType {
     Mail,
 }
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
 pub enum MessageStatus {
     Dispatched,
     Acknowledged,
@@ -44,6 +50,15 @@ pub enum MessageStatus {
     Processed,
 }
 
+#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
+pub enum TransportStatus {
+    Queued,
+    Sent,
+    Delivered,
+    Read,
+    Failed,
+}
+
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub enum MessageFormatType {
     Html,

src/models/runner.rs

@@ -2,21 +2,24 @@ use std::net::IpAddr;
 
 use serde::{Deserialize, Serialize};
 
+use crate::models::ScriptType;
 use crate::time::Timestamp;
 
 #[derive(Serialize, Deserialize, Clone)]
 pub struct Runner {
-    id: u32,
+    pub id: u32,
     /// Mycelium public key
-    pubkey: String,
+    pub pubkey: String,
     /// Mycelium address
-    address: IpAddr,
+    pub address: IpAddr,
     /// Needs to be set by the runner, usually `runner<runnerid`
-    topic: String,
+    pub topic: String,
+    /// The script type this runner can execute; used for routing
+    pub script_type: ScriptType,
     /// If this is true, the runner also listens on a local redis queue
-    local: bool,
-    created_at: Timestamp,
-    updated_at: Timestamp,
+    pub local: bool,
+    pub created_at: Timestamp,
+    pub updated_at: Timestamp,
 }
 
 #[derive(Serialize, Deserialize, Clone)]

src/models/script_type.rs

@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-#[derive(Debug, Clone, Deserialize, Serialize)]
+#[derive(Debug, Clone, Deserialize, Serialize, PartialEq, Eq)]
 pub enum ScriptType {
     Osis,
     Sal,

src/router.rs

@@ -0,0 +1,475 @@
+use std::{collections::HashSet, sync::Arc};
+
+use serde_json::{Value, json};
+use tokio::sync::Semaphore;
+
+use crate::{
+    clients::{Destination, MyceliumClient, SupervisorClient},
+    models::{Job, JobStatus, Message, MessageStatus, ScriptType, TransportStatus},
+    service::AppService,
+};
+use tracing::{error, info, warn};
+
+#[derive(Clone, Debug)]
+pub struct RouterConfig {
+    pub context_ids: Vec<u32>,
+    pub concurrency: usize,
+    pub base_url: String, // e.g. http://127.0.0.1:8990
+    pub topic: String,    // e.g. "supervisor.rpc"
+    // Transport status polling configuration
+    pub transport_poll_interval_secs: u64, // e.g. 2
+    pub transport_poll_timeout_secs: u64,  // e.g. 300 (5 minutes)
+}
+
+/// Start background router loops, one per context.
+/// Each loop:
+/// - BRPOP msg_out with 1s timeout
+/// - Loads the Message by key, selects a Runner by script_type
+/// - Sends supervisor JSON-RPC via Mycelium
+/// - On success: Message.status = Acknowledged
+/// - On error: Message.status = Error and append a log
+pub fn start_router(service: AppService, cfg: RouterConfig) -> Vec<tokio::task::JoinHandle<()>> {
+    let mut handles = Vec::new();
+    for ctx_id in cfg.context_ids.clone() {
+        let service_cloned = service.clone();
+        let cfg_cloned = cfg.clone();
+        let handle = tokio::spawn(async move {
+            let sem = Arc::new(Semaphore::new(cfg_cloned.concurrency));
+
+            // Create a shared Mycelium client for this context loop (retry until available)
+            let mycelium = loop {
+                match MyceliumClient::new(cfg_cloned.base_url.clone()) {
+                    Ok(c) => break Arc::new(c),
+                    Err(e) => {
+                        error!(context_id=ctx_id, error=%e, "MyceliumClient init error");
+                        tokio::time::sleep(std::time::Duration::from_secs(1)).await;
+                    }
+                }
+            };
+
+            loop {
+                // Pop next message key (blocking with timeout)
+                match service_cloned.brpop_msg_out(ctx_id, 1).await {
+                    Ok(Some(key)) => {
+                        let permit = {
+                            // acquire a concurrency permit (non-fair is fine)
+                            let sem = sem.clone();
+                            // if semaphore is exhausted, await until a slot becomes available
+                            match sem.acquire_owned().await {
+                                Ok(p) => p,
+                                Err(_) => {
+                                    // Semaphore closed; exit loop
+                                    break;
+                                }
+                            }
+                        };
+                        let service_task = service_cloned.clone();
+                        let cfg_task = cfg_cloned.clone();
+                        tokio::spawn({
+                            let mycelium = mycelium.clone();
+                            async move {
+                                // Ensure permit is dropped at end of task
+                                let _permit = permit;
+                                if let Err(e) =
+                                    deliver_one(&service_task, &cfg_task, ctx_id, &key, mycelium)
+                                        .await
+                                {
+                                    error!(context_id=ctx_id, key=%key, error=%e, "Delivery error");
+                                }
+                            }
+                        });
+                    }
+                    Ok(None) => {
+                        // timeout: just tick
+                        continue;
+                    }
+                    Err(e) => {
+                        error!(context_id=ctx_id, error=%e, "BRPOP error");
+                        // small backoff to avoid busy-loop on persistent errors
+                        tokio::time::sleep(std::time::Duration::from_millis(200)).await;
+                    }
+                }
+            }
+        });
+        handles.push(handle);
+    }
+    handles
+}
+
+async fn deliver_one(
+    service: &AppService,
+    cfg: &RouterConfig,
+    context_id: u32,
+    msg_key: &str,
+    mycelium: Arc<MyceliumClient>,
+) -> Result<(), Box<dyn std::error::Error + Send + Sync>> {
+    // Parse "message:{caller_id}:{id}"
+    let (caller_id, id) = parse_message_key(msg_key)
+        .ok_or_else(|| format!("invalid message key format: {}", msg_key))?;
+
+    // Load message
+    let msg: Message = service.load_message(context_id, caller_id, id).await?;
+    // Embedded job id (if any)
+    let job_id_opt: Option<u32> = msg.job.first().map(|j| j.id);
+
+    // Determine routing script_type
+    let desired: ScriptType = determine_script_type(&msg);
+
+    // Discover runners and select a matching one
+    let runners = service.scan_runners(context_id).await?;
+    let Some(runner) = runners.into_iter().find(|r| r.script_type == desired) else {
+        let log = format!(
+            "No runner with script_type {:?} available in context {} for message {}",
+            desired, context_id, msg_key
+        );
+        let _ = service
+            .append_message_logs(context_id, caller_id, id, vec![log.clone()])
+            .await;
+        let _ = service
+            .update_message_status(context_id, caller_id, id, MessageStatus::Error)
+            .await;
+        return Err(log.into());
+    };
+
+    // Build SupervisorClient
+    let dest = if !runner.pubkey.trim().is_empty() {
+        Destination::Pk(runner.pubkey.clone())
+    } else {
+        Destination::Ip(runner.address)
+    };
+    // Keep clones for poller usage
+    let dest_for_poller = dest.clone();
+    let topic_for_poller = cfg.topic.clone();
+    let client = SupervisorClient::new_with_client(
+        mycelium.clone(),
+        dest.clone(),
+        cfg.topic.clone(),
+        None, // secret
+    );
+
+    // Build supervisor method and params from Message
+    let method = msg.message.clone();
+    let params = build_params(&msg)?;
+
+    // Send
+    let out_id = client.call(&method, params).await?;
+
+    // Store transport id and initial Sent status
+    let _ = service
+        .update_message_transport(
+            context_id,
+            caller_id,
+            id,
+            Some(out_id.clone()),
+            Some(TransportStatus::Sent),
+        )
+        .await;
+
+    // Mark as acknowledged on success
+    service
+        .update_message_status(context_id, caller_id, id, MessageStatus::Acknowledged)
+        .await?;
+
+    // Spawn transport-status poller
+    {
+        let service_poll = service.clone();
+        let poll_interval = std::time::Duration::from_secs(cfg.transport_poll_interval_secs);
+        let poll_timeout = std::time::Duration::from_secs(cfg.transport_poll_timeout_secs);
+        let out_id_cloned = out_id.clone();
+        let mycelium = mycelium.clone();
+        // Determine reply timeout for supervisor job.result: prefer message.timeout_result, fallback to router config timeout
+        let job_result_reply_timeout: u64 = if msg.timeout_result > 0 {
+            msg.timeout_result as u64
+        } else {
+            cfg.transport_poll_timeout_secs
+        };
+
+        tokio::spawn(async move {
+            let start = std::time::Instant::now();
+            let client = mycelium;
+
+            // Supervisor call context captured for sync status checks
+            let sup_dest = dest_for_poller;
+            let sup_topic = topic_for_poller;
+            let job_id_opt = job_id_opt;
+
+            let mut last_status: Option<TransportStatus> = Some(TransportStatus::Sent);
+
+            loop {
+                if start.elapsed() >= poll_timeout {
+                    let _ = service_poll
+                        .append_message_logs(
+                            context_id,
+                            caller_id,
+                            id,
+                            vec!["Transport-status polling timed out".to_string()],
+                        )
+                        .await;
+                    // leave last known status; do not override
+                    break;
+                }
+
+                match client.message_status(&out_id_cloned).await {
+                    Ok(s) => {
+                        if last_status.as_ref() != Some(&s) {
+                            let _ = service_poll
+                                .update_message_transport(
+                                    context_id,
+                                    caller_id,
+                                    id,
+                                    None,
+                                    Some(s.clone()),
+                                )
+                                .await;
+                            last_status = Some(s.clone());
+                        }
+
+                        // Stop on terminal states
+                        if matches!(s, TransportStatus::Delivered | TransportStatus::Read) {
+                            // On Read, fetch supervisor job.status and update local job/message if terminal
+                            if matches!(s, TransportStatus::Read) {
+                                if let Some(job_id) = job_id_opt {
+                                    let sup = SupervisorClient::new_with_client(
+                                        client.clone(),
+                                        sup_dest.clone(),
+                                        sup_topic.clone(),
+                                        None,
+                                    );
+                                    match sup.job_status_sync(job_id.to_string(), 10).await {
+                                        Ok(remote_status) => {
+                                            if let Some((mapped, terminal)) =
+                                                map_supervisor_job_status(&remote_status)
+                                            {
+                                                if terminal {
+                                                    let _ = service_poll
+                                                        .update_job_status_unchecked(
+                                                            context_id,
+                                                            caller_id,
+                                                            job_id,
+                                                            mapped.clone(),
+                                                        )
+                                                        .await;
+
+                                                    // After terminal status, fetch supervisor job.result and store into Job.result
+                                                    let sup = SupervisorClient::new_with_client(
+                                                        client.clone(),
+                                                        sup_dest.clone(),
+                                                        sup_topic.clone(),
+                                                        None,
+                                                    );
+                                                    match sup
+                                                        .job_result_sync(
+                                                            job_id.to_string(),
+                                                            job_result_reply_timeout,
+                                                        )
+                                                        .await
+                                                    {
+                                                        Ok(result_map) => {
+                                                            // Persist the result into the Job.result map (merge)
+                                                            let _ = service_poll
+                                                                .update_job_result_merge_unchecked(
+                                                                    context_id,
+                                                                    caller_id,
+                                                                    job_id,
+                                                                    result_map.clone(),
+                                                                )
+                                                                .await;
+                                                            // Log which key was stored (success or error)
+                                                            let key = result_map
+                                                                .keys()
+                                                                .next()
+                                                                .cloned()
+                                                                .unwrap_or_else(|| {
+                                                                    "unknown".to_string()
+                                                                });
+                                                            let _ = service_poll
+                                                                .append_message_logs(
+                                                                    context_id,
+                                                                    caller_id,
+                                                                    id,
+                                                                    vec![format!(
+                                                                        "Stored supervisor job.result for job {} ({})",
+                                                                        job_id, key
+                                                                    )],
+                                                                )
+                                                                .await;
+                                                        }
+                                                        Err(e) => {
+                                                            let _ = service_poll
+                                                                .append_message_logs(
+                                                                    context_id,
+                                                                    caller_id,
+                                                                    id,
+                                                                    vec![format!(
+                                                                        "job.result fetch error for job {}: {}",
+                                                                        job_id, e
+                                                                    )],
+                                                                )
+                                                                .await;
+                                                        }
+                                                    }
+
+                                                    // Mark message as processed
+                                                    let _ = service_poll
+                                                        .update_message_status(
+                                                            context_id,
+                                                            caller_id,
+                                                            id,
+                                                            MessageStatus::Processed,
+                                                        )
+                                                        .await;
+                                                    let _ = service_poll
+                                                        .append_message_logs(
+                                                            context_id,
+                                                            caller_id,
+                                                            id,
+                                                            vec![format!(
+                                                                "Supervisor job.status for job {} -> {} (mapped to {:?})",
+                                                                job_id, remote_status, mapped
+                                                            )],
+                                                        )
+                                                        .await;
+                                                }
+                                            } else {
+                                                let _ = service_poll
+                                                    .append_message_logs(
+                                                        context_id,
+                                                        caller_id,
+                                                        id,
+                                                        vec![format!(
+                                                            "Unknown supervisor status '{}' for job {}",
+                                                            remote_status, job_id
+                                                        )],
+                                                    )
+                                                    .await;
+                                            }
+                                        }
+                                        Err(e) => {
+                                            let _ = service_poll
+                                                .append_message_logs(
+                                                    context_id,
+                                                    caller_id,
+                                                    id,
+                                                    vec![format!("job.status sync error: {}", e)],
+                                                )
+                                                .await;
+                                        }
+                                    }
+                                }
+                            }
+                            break;
+                        }
+                        if matches!(s, TransportStatus::Failed) {
+                            let _ = service_poll
+                                .append_message_logs(
+                                    context_id,
+                                    caller_id,
+                                    id,
+                                    vec![format!(
+                                        "Transport failed for outbound id {out_id_cloned}"
+                                    )],
+                                )
+                                .await;
+                            break;
+                        }
+                    }
+                    Err(e) => {
+                        // Log and continue polling
+                        let _ = service_poll
+                            .append_message_logs(
+                                context_id,
+                                caller_id,
+                                id,
+                                vec![format!("messageStatus query error: {e}")],
+                            )
+                            .await;
+                    }
+                }
+
+                tokio::time::sleep(poll_interval).await;
+            }
+        });
+    }
+
+    Ok(())
+}
+
+fn determine_script_type(msg: &Message) -> ScriptType {
+    // Prefer embedded job's script_type if available, else fallback to message.message_type
+    match msg.job.first() {
+        Some(j) => j.script_type.clone(),
+        None => msg.message_type.clone(),
+    }
+}
+
+fn build_params(msg: &Message) -> Result<Value, Box<dyn std::error::Error + Send + Sync>> {
+    // Minimal mapping:
+    // - "job.run" with exactly one embedded job: [{ "job": <job> }]
+    // - otherwise: []
+    if msg.message == "job.run"
+        && let Some(j) = msg.job.first()
+    {
+        let jv = job_to_json(j)?;
+        return Ok(json!([ { "job": jv } ]));
+    }
+
+    Ok(json!([]))
+}
+
+fn job_to_json(job: &Job) -> Result<Value, Box<dyn std::error::Error + Send + Sync>> {
+    Ok(serde_json::to_value(job)?)
+}
+
+fn parse_message_key(s: &str) -> Option<(u32, u32)> {
+    // Expect "message:{caller_id}:{id}"
+    let mut it = s.split(':');
+    match (it.next(), it.next(), it.next(), it.next()) {
+        (Some("message"), Some(caller), Some(id), None) => {
+            let caller_id = caller.parse::<u32>().ok()?;
+            let msg_id = id.parse::<u32>().ok()?;
+            Some((caller_id, msg_id))
+        }
+        _ => None,
+    }
+}
+
+/// Map supervisor job.status -> (local JobStatus, terminal)
+fn map_supervisor_job_status(s: &str) -> Option<(JobStatus, bool)> {
+    match s {
+        "created" | "queued" => Some((JobStatus::Dispatched, false)),
+        "running" => Some((JobStatus::Started, false)),
+        "completed" => Some((JobStatus::Finished, true)),
+        "failed" | "timeout" => Some((JobStatus::Error, true)),
+        _ => None,
+    }
+}
+
+/// Auto-discover contexts periodically and ensure a router loop exists for each.
+/// Returns a JoinHandle of the discovery task (router loops are detached).
+pub fn start_router_auto(service: AppService, cfg: RouterConfig) -> tokio::task::JoinHandle<()> {
+    tokio::spawn(async move {
+        let mut active: HashSet<u32> = HashSet::new();
+        loop {
+            match service.list_context_ids().await {
+                Ok(ids) => {
+                    for ctx_id in ids {
+                        if !active.contains(&ctx_id) {
+                            // Spawn a loop for this new context
+                            let cfg_ctx = RouterConfig {
+                                context_ids: vec![ctx_id],
+                                ..cfg.clone()
+                            };
+                            let _ = start_router(service.clone(), cfg_ctx);
+                            active.insert(ctx_id);
+                            info!(context_id = ctx_id, "Started loop for context");
+                        }
+                    }
+                }
+                Err(e) => {
+                    error!(error=%e, "list_context_ids error");
+                }
+            }
+            tokio::time::sleep(std::time::Duration::from_secs(5)).await;
+        }
+    })
+}

src/rpc.rs

@@ -13,19 +13,25 @@ use serde::Deserialize;
 use serde_json::{Value, json};
 
 use crate::{
-    dag::{DagError, FlowDag, build_flow_dag},
-    models::{Actor, Context, Flow, Job, Message, MessageFormatType, Runner, ScriptType},
-    storage::RedisDriver,
+    dag::{DagError, FlowDag},
+    models::{
+        Actor, Context, Flow, FlowStatus, Job, JobStatus, Message, MessageFormatType,
+        MessageStatus, Runner, ScriptType,
+    },
+    service::AppService,
     time::current_timestamp,
 };
 
+/// The OpenRPC specification for the HeroCoordinator JSON-RPC API
+const OPENRPC_SPEC: &str = include_str!("../specs/openrpc.json");
+
 pub struct AppState {
-    pub redis: RedisDriver,
+    pub service: AppService,
 }
 
 impl AppState {
-    pub fn new(redis: RedisDriver) -> Self {
-        Self { redis }
+    pub fn new(service: AppService) -> Self {
+        Self { service }
     }
 }
 
@@ -59,6 +65,26 @@ fn dag_err(e: DagError) -> ErrorObjectOwned {
             "DAG Cycle Detected",
             Some(Value::String(e.to_string())),
         ),
+        DagError::UnknownJob { .. } => ErrorObjectOwned::owned(
+            -32022,
+            "DAG Unknown Job",
+            Some(Value::String(e.to_string())),
+        ),
+        DagError::DependenciesIncomplete { .. } => ErrorObjectOwned::owned(
+            -32023,
+            "DAG Dependencies Incomplete",
+            Some(Value::String(e.to_string())),
+        ),
+        DagError::FlowFailed { .. } => ErrorObjectOwned::owned(
+            -32024,
+            "DAG Flow Failed",
+            Some(Value::String(e.to_string())),
+        ),
+        DagError::JobNotStarted { .. } => ErrorObjectOwned::owned(
+            -32025,
+            "DAG Job Not Started",
+            Some(Value::String(e.to_string())),
+        ),
     }
 }
 
@@ -94,25 +120,24 @@ pub struct ContextCreate {
     pub executors: Vec<u32>,
 }
 impl ContextCreate {
-    pub fn into_domain(self) -> Result<Context, String> {
+    pub fn into_domain(self) -> Context {
         let ts = current_timestamp();
-        let mut v = serde_json::Map::new();
-        v.insert("id".to_string(), Value::from(self.id));
-        v.insert(
-            "admins".to_string(),
-            serde_json::to_value(self.admins).unwrap(),
-        );
-        v.insert(
-            "readers".to_string(),
-            serde_json::to_value(self.readers).unwrap(),
-        );
-        v.insert(
-            "executors".to_string(),
-            serde_json::to_value(self.executors).unwrap(),
-        );
-        v.insert("created_at".to_string(), Value::from(ts));
-        v.insert("updated_at".to_string(), Value::from(ts));
-        serde_json::from_value(Value::Object(v)).map_err(|e| e.to_string())
+
+        let ContextCreate {
+            id,
+            admins,
+            readers,
+            executors,
+        } = self;
+
+        Context {
+            id,
+            admins,
+            readers,
+            executors,
+            created_at: ts,
+            updated_at: ts,
+        }
     }
 }
 
@@ -122,21 +147,33 @@ pub struct RunnerCreate {
     pub pubkey: String,
     pub address: IpAddr,
     pub topic: String,
+    /// The script type this runner executes (used for routing)
+    pub script_type: ScriptType,
     pub local: bool,
 }
 impl RunnerCreate {
-    pub fn into_domain(self) -> Result<Runner, String> {
+    pub fn into_domain(self) -> Runner {
         let ts = current_timestamp();
-        let v = json!({
-            "id": self.id,
-            "pubkey": self.pubkey,
-            "address": self.address,
-            "topic": self.topic,
-            "local": self.local,
-            "created_at": ts,
-            "updated_at": ts,
-        });
-        serde_json::from_value(v).map_err(|e| e.to_string())
+
+        let RunnerCreate {
+            id,
+            pubkey,
+            address,
+            topic,
+            script_type,
+            local,
+        } = self;
+
+        Runner {
+            id,
+            pubkey,
+            address,
+            topic,
+            script_type,
+            local,
+            created_at: ts,
+            updated_at: ts,
+        }
     }
 }
 
@@ -147,24 +184,31 @@ pub struct FlowCreate {
     pub context_id: u32,
     pub jobs: Vec<u32>,
     pub env_vars: HashMap<String, String>,
-    #[serde(default)]
-    pub result: Option<HashMap<String, String>>,
 }
+
 impl FlowCreate {
-    pub fn into_domain(self) -> Result<Flow, String> {
+    pub fn into_domain(self) -> Flow {
         let ts = current_timestamp();
-        let v = json!({
-            "id": self.id,
-            "caller_id": self.caller_id,
-            "context_id": self.context_id,
-            "jobs": self.jobs,
-            "env_vars": self.env_vars,
-            "result": self.result.unwrap_or_default(),
-            "created_at": ts,
-            "updated_at": ts,
-            "status": "Dispatched",
-        });
-        serde_json::from_value(v).map_err(|e| e.to_string())
+
+        let FlowCreate {
+            id,
+            caller_id,
+            context_id,
+            jobs,
+            env_vars,
+        } = self;
+
+        Flow {
+            id,
+            caller_id,
+            context_id,
+            jobs,
+            env_vars,
+            result: HashMap::new(),
+            created_at: ts,
+            updated_at: ts,
+            status: FlowStatus::Created,
+        }
     }
 }
 
@@ -178,31 +222,43 @@ pub struct JobCreate {
     pub timeout: u32,
     pub retries: u8,
     pub env_vars: HashMap<String, String>,
-    #[serde(default)]
-    pub result: Option<HashMap<String, String>>,
     pub prerequisites: Vec<String>,
     pub depends: Vec<u32>,
 }
+
 impl JobCreate {
-    pub fn into_domain(self) -> Result<Job, String> {
+    pub fn into_domain(self) -> Job {
         let ts = current_timestamp();
-        let v = json!({
-            "id": self.id,
-            "caller_id": self.caller_id,
-            "context_id": self.context_id,
-            "script": self.script,
-            "script_type": self.script_type,
-            "timeout": self.timeout,
-            "retries": self.retries,
-            "env_vars": self.env_vars,
-            "result": self.result.unwrap_or_default(),
-            "prerequisites": self.prerequisites,
-            "depends": self.depends,
-            "created_at": ts,
-            "updated_at": ts,
-            "status": "Dispatched",
-        });
-        serde_json::from_value(v).map_err(|e| e.to_string())
+
+        let JobCreate {
+            id,
+            caller_id,
+            context_id,
+            script,
+            script_type,
+            timeout,
+            retries,
+            env_vars,
+            prerequisites,
+            depends,
+        } = self;
+
+        Job {
+            id,
+            caller_id,
+            context_id,
+            script,
+            script_type,
+            timeout,
+            retries,
+            env_vars,
+            result: HashMap::new(),
+            prerequisites,
+            depends,
+            created_at: ts,
+            updated_at: ts,
+            status: JobStatus::WaitingForPrerequisites,
+        }
     }
 }
 
@@ -218,48 +274,51 @@ pub struct MessageCreate {
     pub timeout_ack: u32,
     pub timeout_result: u32,
     pub job: Vec<JobCreate>,
-    #[serde(default)]
-    pub logs: Option<Vec<String>>,
 }
 impl MessageCreate {
-    pub fn into_domain(self) -> Result<Message, String> {
+    pub fn into_domain(self) -> Message {
         let ts = current_timestamp();
-        let jobs: Result<Vec<Value>, String> = self
-            .job
-            .into_iter()
-            .map(|j| {
-                let jd: Job = j.into_domain()?;
-                serde_json::to_value(jd).map_err(|e| e.to_string())
-            })
-            .collect();
-        let v = json!({
-            "id": self.id,
-            "caller_id": self.caller_id,
-            "context_id": self.context_id,
-            "message": self.message,
-            "message_type": self.message_type,
-            "message_format_type": self.message_format_type, // "Html" | "Text" | "Md"
-            "timeout": self.timeout,
-            "timeout_ack": self.timeout_ack,
-            "timeout_result": self.timeout_result,
-            "job": jobs?,
-            "logs": self.logs.unwrap_or_default(),
-            "created_at": ts,
-            "updated_at": ts,
-            "status": "Dispatched",
-        });
-        serde_json::from_value(v).map_err(|e| e.to_string())
+
+        let MessageCreate {
+            id,
+            caller_id,
+            context_id,
+            message,
+            message_type,
+            message_format_type,
+            timeout,
+            timeout_ack,
+            timeout_result,
+            job,
+        } = self;
+
+        Message {
+            id,
+            caller_id,
+            context_id,
+            message,
+            message_type,
+            message_format_type,
+            timeout,
+            timeout_ack,
+            timeout_result,
+            transport_id: None,
+            transport_status: None,
+            job: job.into_iter().map(JobCreate::into_domain).collect(),
+            logs: Vec::new(),
+            created_at: ts,
+            updated_at: ts,
+            status: MessageStatus::Dispatched,
+        }
     }
 }
 
 #[derive(Debug, Deserialize)]
 pub struct ActorCreateParams {
-    pub context_id: u32,
     pub actor: ActorCreate,
 }
 #[derive(Debug, Deserialize)]
 pub struct ActorLoadParams {
-    pub context_id: u32,
     pub id: u32,
 }
 
@@ -334,9 +393,9 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 async move {
                     let p: ActorCreateParams = params.parse().map_err(invalid_params_err)?;
                     let actor = p.actor.into_domain().map_err(invalid_params_err)?;
-                    state
-                        .redis
-                        .save_actor(p.context_id, &actor)
+                    let actor = state
+                        .service
+                        .create_actor(actor)
                         .await
                         .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(actor)
@@ -351,11 +410,7 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: ActorLoadParams = params.parse().map_err(invalid_params_err)?;
-                    let actor = state
-                        .redis
-                        .load_actor(p.context_id, p.id)
-                        .await
-                        .map_err(storage_err)?;
+                    let actor = state.service.load_actor(p.id).await.map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(actor)
                 }
             })
@@ -370,8 +425,12 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: ContextCreateParams = params.parse().map_err(invalid_params_err)?;
-                    let ctx = p.context.into_domain().map_err(invalid_params_err)?;
-                    state.redis.save_context(&ctx).await.map_err(storage_err)?;
+                    let ctx = p.context.into_domain();
+                    let ctx = state
+                        .service
+                        .create_context(ctx)
+                        .await
+                        .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(ctx)
                 }
             })
@@ -384,7 +443,11 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: ContextLoadParams = params.parse().map_err(invalid_params_err)?;
-                    let ctx = state.redis.load_context(p.id).await.map_err(storage_err)?;
+                    let ctx = state
+                        .service
+                        .load_context(p.id)
+                        .await
+                        .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(ctx)
                 }
             })
@@ -399,10 +462,10 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: RunnerCreateParams = params.parse().map_err(invalid_params_err)?;
-                    let runner = p.runner.into_domain().map_err(invalid_params_err)?;
-                    state
-                        .redis
-                        .save_runner(p.context_id, &runner)
+                    let runner = p.runner.into_domain();
+                    let runner = state
+                        .service
+                        .create_runner(p.context_id, runner)
                         .await
                         .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(runner)
@@ -418,7 +481,7 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 async move {
                     let p: RunnerLoadParams = params.parse().map_err(invalid_params_err)?;
                     let runner = state
-                        .redis
+                        .service
                         .load_runner(p.context_id, p.id)
                         .await
                         .map_err(storage_err)?;
@@ -436,10 +499,10 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: FlowCreateParams = params.parse().map_err(invalid_params_err)?;
-                    let flow = p.flow.into_domain().map_err(invalid_params_err)?;
-                    state
-                        .redis
-                        .save_flow(p.context_id, &flow)
+                    let flow = p.flow.into_domain();
+                    let flow = state
+                        .service
+                        .create_flow(p.context_id, flow)
                         .await
                         .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(flow)
@@ -455,7 +518,7 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 async move {
                     let p: FlowLoadParams = params.parse().map_err(invalid_params_err)?;
                     let flow = state
-                        .redis
+                        .service
                         .load_flow(p.context_id, p.id)
                         .await
                         .map_err(storage_err)?;
@@ -471,7 +534,9 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: FlowLoadParams = params.parse().map_err(invalid_params_err)?;
-                    let dag: FlowDag = build_flow_dag(&state.redis, p.context_id, p.id)
+                    let dag: FlowDag = state
+                        .service
+                        .flow_dag(p.context_id, p.id)
                         .await
                         .map_err(dag_err)?;
                     Ok::<_, ErrorObjectOwned>(dag)
@@ -479,6 +544,23 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
             })
             .expect("register flow.dag");
     }
+    {
+        let state = state.clone();
+        module
+            .register_async_method("flow.start", move |params, _caller, _ctx| {
+                let state = state.clone();
+                async move {
+                    let p: FlowLoadParams = params.parse().map_err(invalid_params_err)?;
+                    let started: bool = state
+                        .service
+                        .flow_start(p.context_id, p.id)
+                        .await
+                        .map_err(storage_err)?;
+                    Ok::<_, ErrorObjectOwned>(started)
+                }
+            })
+            .expect("register flow.start");
+    }
 
     // Job
     {
@@ -488,13 +570,12 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: JobCreateParams = params.parse().map_err(invalid_params_err)?;
-                    let job = p.job.into_domain().map_err(invalid_params_err)?;
-                    state
-                        .redis
-                        .save_job(p.context_id, &job)
+                    let job = p.job.into_domain();
+                    let job = state
+                        .service
+                        .create_job(p.context_id, job)
                         .await
                         .map_err(storage_err)?;
-
                     Ok::<_, ErrorObjectOwned>(job)
                 }
             })
@@ -508,7 +589,7 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 async move {
                     let p: JobLoadParams = params.parse().map_err(invalid_params_err)?;
                     let job = state
-                        .redis
+                        .service
                         .load_job(p.context_id, p.caller_id, p.id)
                         .await
                         .map_err(storage_err)?;
@@ -526,10 +607,10 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 let state = state.clone();
                 async move {
                     let p: MessageCreateParams = params.parse().map_err(invalid_params_err)?;
-                    let message = p.message.into_domain().map_err(invalid_params_err)?;
-                    state
-                        .redis
-                        .save_message(p.context_id, &message)
+                    let message = p.message.into_domain();
+                    let message = state
+                        .service
+                        .create_message(p.context_id, message)
                         .await
                         .map_err(storage_err)?;
                     Ok::<_, ErrorObjectOwned>(message)
@@ -545,7 +626,7 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
                 async move {
                     let p: MessageLoadParams = params.parse().map_err(invalid_params_err)?;
                     let msg = state
-                        .redis
+                        .service
                         .load_message(p.context_id, p.caller_id, p.id)
                         .await
                         .map_err(storage_err)?;
@@ -554,6 +635,15 @@ pub fn build_module(state: Arc<AppState>) -> RpcModule<()> {
             })
             .expect("register message.load");
     }
+    {
+        module
+            .register_async_method("rpc.discover", move |_params, _caller, _ctx| async move {
+                let spec = serde_json::from_str::<serde_json::Value>(OPENRPC_SPEC)
+                    .expect("Failed to parse OpenRPC spec");
+                Ok::<_, ErrorObjectOwned>(spec)
+            })
+            .expect("register rpc.discover");
+    }
 
     module
 }

src/storage.rs

@@ -1,4 +1,3 @@
-
 pub mod redis;
 
 pub use redis::RedisDriver;

src/storage/redis.rs

@@ -6,7 +6,11 @@ use serde::de::DeserializeOwned;
 use serde_json::{Map as JsonMap, Value};
 use tokio::sync::Mutex;
 
-use crate::models::{Actor, Context, Flow, Job, Message, Runner};
+use crate::models::{
+    Actor, Context, Flow, FlowStatus, Job, JobStatus, Message, MessageStatus, Runner,
+    TransportStatus,
+};
+use tracing::{debug, error, info, trace, warn};
 
 type Result<T> = std::result::Result<T, Box<dyn std::error::Error + Send + Sync>>;
 
@@ -50,8 +54,14 @@ impl RedisDriver {
 
         // Slow path: create a new manager and cache it
         let url = format!("{}/{}", self.base_addr.trim_end_matches('/'), db);
-        let client = redis::Client::open(url.as_str())?;
-        let cm = client.get_connection_manager().await?;
+        let client = redis::Client::open(url.as_str()).map_err(|e| {
+            error!(%url, db=%db, error=%e, "Redis client open failed");
+            e
+        })?;
+        let cm = client.get_connection_manager().await.map_err(|e| {
+            error!(%url, db=%db, error=%e, "Redis connection manager init failed");
+            e
+        })?;
 
         let mut guard = self.managers.lock().await;
         let entry = guard.entry(db).or_insert(cm);
@@ -102,21 +112,37 @@ impl RedisDriver {
 
     async fn hset_model<T: Serialize>(&self, db: u32, key: &str, model: &T) -> Result<()> {
         let mut cm = self.manager_for_db(db).await?;
-        let pairs = Self::struct_to_hset_pairs(model)?;
+        let pairs = Self::struct_to_hset_pairs(model).map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "Serialize model to HSET pairs failed");
+            e
+        })?;
         // Ensure no stale fields
-        let _: u64 = cm.del(key).await.unwrap_or(0);
+        let del_res: redis::RedisResult<u64> = cm.del(key).await;
+        if let Err(e) = del_res {
+            warn!(db=%db, key=%key, error=%e, "DEL before HSET failed");
+        }
         // Write all fields
-        let _: usize = cm.hset_multiple(key, &pairs).await?;
+        let _: () = cm.hset_multiple(key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET multiple failed");
+            e
+        })?;
         Ok(())
     }
 
     async fn hget_model<T: DeserializeOwned>(&self, db: u32, key: &str) -> Result<T> {
         let mut cm = self.manager_for_db(db).await?;
-        let map: StdHashMap<String, String> = cm.hgetall(key).await?;
+        let map: StdHashMap<String, String> = cm.hgetall(key).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HGETALL failed");
+            e
+        })?;
         if map.is_empty() {
+            // NotFound is expected in some flows; don't log as error
             return Err(format!("Key not found: {}", key).into());
         }
-        Self::hmap_to_struct(map)
+        Self::hmap_to_struct(map).map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "Deserialize model from HGETALL failed");
+            e
+        })
     }
 
     // -----------------------------
@@ -161,7 +187,11 @@ impl RedisDriver {
             .and_then(|v| v.as_u64())
             .ok_or("Context.id missing or not a number")? as u32;
         let key = Self::context_key(id);
-        self.hset_model(id, &key, ctx).await
+        // Write the context hash in its own DB
+        self.hset_model(id, &key, ctx).await?;
+        // Register this context id in the global registry (DB 0)
+        let _ = self.register_context_id(id).await;
+        Ok(())
     }
 
     /// Load a Context from its own DB (db index = id)
@@ -190,6 +220,22 @@ impl RedisDriver {
         let key = Self::actor_key(id);
         self.hget_model(db, &key).await
     }
+    /// Save an Actor globally in DB 0 (Actor is context-independent)
+    pub async fn save_actor_global(&self, actor: &Actor) -> Result<()> {
+        let json = serde_json::to_value(actor)?;
+        let id = json
+            .get("id")
+            .and_then(|v| v.as_u64())
+            .ok_or("Actor.id missing or not a number")? as u32;
+        let key = Self::actor_key(id);
+        self.hset_model(0, &key, actor).await
+    }
+
+    /// Load an Actor globally from DB 0 by id
+    pub async fn load_actor_global(&self, id: u32) -> Result<Actor> {
+        let key = Self::actor_key(id);
+        self.hget_model(0, &key).await
+    }
 
     // -----------------------------
     // Runner
@@ -252,6 +298,38 @@ impl RedisDriver {
         self.hget_model(db, &key).await
     }
 
+    /// Atomically update a job's status and `updated_at` fields.
+    /// - No transition validation is performed.
+    /// - Writes only the two fields via HSET to avoid rewriting the whole model.
+    pub async fn update_job_status(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        status: JobStatus,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::job_key(caller_id, id);
+
+        // Serialize enum into the same plain string representation stored by create paths
+        let status_str = match serde_json::to_value(&status)? {
+            Value::String(s) => s,
+            v => v.to_string(),
+        };
+
+        let ts = crate::time::current_timestamp();
+
+        let pairs = vec![
+            ("status".to_string(), status_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_job_status failed");
+            e
+        })?;
+        Ok(())
+    }
+
     // -----------------------------
     // Message
     // -----------------------------
@@ -274,4 +352,403 @@ impl RedisDriver {
         let key = Self::message_key(caller_id, id);
         self.hget_model(db, &key).await
     }
+
+    // -----------------------------
+    // Partial update helpers
+    // -----------------------------
+
+    /// Flow: update only status and updated_at
+    pub async fn update_flow_status(&self, db: u32, id: u32, status: FlowStatus) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::flow_key(id);
+
+        let status_str = match serde_json::to_value(&status)? {
+            Value::String(s) => s,
+            v => v.to_string(),
+        };
+        let ts = crate::time::current_timestamp();
+
+        let pairs = vec![
+            ("status".to_string(), status_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_flow_status failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Message: update only status and updated_at
+    pub async fn update_message_status(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        status: MessageStatus,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::message_key(caller_id, id);
+
+        let status_str = match serde_json::to_value(&status)? {
+            Value::String(s) => s,
+            v => v.to_string(),
+        };
+        let ts = crate::time::current_timestamp();
+
+        let pairs = vec![
+            ("status".to_string(), status_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_message_status failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Message: update transport_id / transport_status (optionally) and bump updated_at
+    pub async fn update_message_transport(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        transport_id: Option<String>,
+        transport_status: Option<TransportStatus>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::message_key(caller_id, id);
+
+        let mut pairs: Vec<(String, String)> = Vec::new();
+
+        if let Some(tid) = transport_id {
+            pairs.push(("transport_id".to_string(), tid));
+        }
+
+        if let Some(ts_status) = transport_status {
+            let status_str = match serde_json::to_value(&ts_status)? {
+                Value::String(s) => s,
+                v => v.to_string(),
+            };
+            pairs.push(("transport_status".to_string(), status_str));
+        }
+
+        // Always bump updated_at
+        let ts = crate::time::current_timestamp();
+        pairs.push(("updated_at".to_string(), ts.to_string()));
+
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_message_transport failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Flow: merge env_vars map and bump updated_at
+    pub async fn update_flow_env_vars_merge(
+        &self,
+        db: u32,
+        id: u32,
+        patch: StdHashMap<String, String>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::flow_key(id);
+
+        let current: Option<String> = cm.hget(&key, "env_vars").await.ok();
+        let mut obj = match current
+            .and_then(|s| serde_json::from_str::<Value>(&s).ok())
+            .and_then(|v| v.as_object().cloned())
+        {
+            Some(m) => m,
+            None => JsonMap::new(),
+        };
+
+        for (k, v) in patch {
+            obj.insert(k, Value::String(v));
+        }
+
+        let env_vars_str = Value::Object(obj).to_string();
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("env_vars".to_string(), env_vars_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_flow_env_vars_merge failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Flow: merge result map and bump updated_at
+    pub async fn update_flow_result_merge(
+        &self,
+        db: u32,
+        id: u32,
+        patch: StdHashMap<String, String>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::flow_key(id);
+
+        let current: Option<String> = cm.hget(&key, "result").await.ok();
+        let mut obj = match current
+            .and_then(|s| serde_json::from_str::<Value>(&s).ok())
+            .and_then(|v| v.as_object().cloned())
+        {
+            Some(m) => m,
+            None => JsonMap::new(),
+        };
+
+        for (k, v) in patch {
+            obj.insert(k, Value::String(v));
+        }
+
+        let result_str = Value::Object(obj).to_string();
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("result".to_string(), result_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_flow_result_merge failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Job: merge env_vars map and bump updated_at
+    pub async fn update_job_env_vars_merge(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        patch: StdHashMap<String, String>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::job_key(caller_id, id);
+
+        let current: Option<String> = cm.hget(&key, "env_vars").await.ok();
+        let mut obj = match current
+            .and_then(|s| serde_json::from_str::<Value>(&s).ok())
+            .and_then(|v| v.as_object().cloned())
+        {
+            Some(m) => m,
+            None => JsonMap::new(),
+        };
+
+        for (k, v) in patch {
+            obj.insert(k, Value::String(v));
+        }
+
+        let env_vars_str = Value::Object(obj).to_string();
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("env_vars".to_string(), env_vars_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_job_env_vars_merge failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Job: merge result map and bump updated_at
+    pub async fn update_job_result_merge(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        patch: StdHashMap<String, String>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::job_key(caller_id, id);
+
+        let current: Option<String> = cm.hget(&key, "result").await.ok();
+        let mut obj = match current
+            .and_then(|s| serde_json::from_str::<Value>(&s).ok())
+            .and_then(|v| v.as_object().cloned())
+        {
+            Some(m) => m,
+            None => JsonMap::new(),
+        };
+
+        for (k, v) in patch {
+            obj.insert(k, Value::String(v));
+        }
+
+        let result_str = Value::Object(obj).to_string();
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("result".to_string(), result_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_job_result_merge failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Flow: set jobs list and bump updated_at
+    pub async fn update_flow_jobs_set(&self, db: u32, id: u32, new_jobs: Vec<u32>) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::flow_key(id);
+
+        let jobs_str = serde_json::to_string(&new_jobs)?;
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("jobs".to_string(), jobs_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET update_flow_jobs_set failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Message: append logs (no dedup) and bump updated_at
+    pub async fn append_message_logs(
+        &self,
+        db: u32,
+        caller_id: u32,
+        id: u32,
+        new_logs: Vec<String>,
+    ) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let key = Self::message_key(caller_id, id);
+
+        let current: Option<String> = cm.hget(&key, "logs").await.ok();
+        let mut arr: Vec<Value> = current
+            .and_then(|s| serde_json::from_str::<Value>(&s).ok())
+            .and_then(|v| v.as_array().cloned())
+            .unwrap_or_default();
+
+        for l in new_logs {
+            arr.push(Value::String(l));
+        }
+
+        let logs_str = Value::Array(arr).to_string();
+        let ts = crate::time::current_timestamp();
+        let pairs = vec![
+            ("logs".to_string(), logs_str),
+            ("updated_at".to_string(), ts.to_string()),
+        ];
+        let _: usize = cm.hset_multiple(&key, &pairs).await.map_err(|e| {
+            error!(db=%db, key=%key, error=%e, "HSET append_message_logs failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    // -----------------------------
+    // Queues (lists)
+    // -----------------------------
+
+    /// Push a value onto a Redis list using LPUSH in the given DB.
+    pub async fn lpush_list(&self, db: u32, list: &str, value: &str) -> Result<()> {
+        let mut cm = self.manager_for_db(db).await?;
+        let _: i64 = cm.lpush(list, value).await.map_err(|e| {
+            error!(db=%db, list=%list, value=%value, error=%e, "LPUSH failed");
+            e
+        })?;
+        Ok(())
+    }
+
+    /// Enqueue a message key onto the outbound queue (msg_out).
+    /// The value is the canonical message key "message:{caller_id}:{id}".
+    pub async fn enqueue_msg_out(&self, db: u32, caller_id: u32, id: u32) -> Result<()> {
+        let key = Self::message_key(caller_id, id);
+        self.lpush_list(db, "msg_out", &key).await
+    }
+
+    /// Block-pop from msg_out with timeout (seconds). Returns the message key if present.
+    /// Uses BRPOP so that the queue behaves FIFO with LPUSH producer.
+    pub async fn brpop_msg_out(&self, db: u32, timeout_secs: usize) -> Result<Option<String>> {
+        let mut cm = self.manager_for_db(db).await?;
+        // BRPOP returns (list, element) on success
+        let res: Option<(String, String)> = redis::cmd("BRPOP")
+            .arg("msg_out")
+            .arg(timeout_secs)
+            .query_async(&mut cm)
+            .await
+            .map_err(|e| {
+                error!(db=%db, timeout_secs=%timeout_secs, error=%e, "BRPOP failed");
+                e
+            })?;
+        Ok(res.map(|(_, v)| v))
+    }
+
+    /// Scan all runner:* keys in this DB and return the deserialized Runner entries.
+    pub async fn scan_runners(&self, db: u32) -> Result<Vec<Runner>> {
+        let mut cm = self.manager_for_db(db).await?;
+        let mut out: Vec<Runner> = Vec::new();
+        let mut cursor: u64 = 0;
+        loop {
+            let (next, keys): (u64, Vec<String>) = redis::cmd("SCAN")
+                .arg(cursor)
+                .arg("MATCH")
+                .arg("runner:*")
+                .arg("COUNT")
+                .arg(100)
+                .query_async(&mut cm)
+                .await
+                .map_err(|e| {
+                    error!(db=%db, cursor=%cursor, error=%e, "SCAN failed");
+                    e
+                })?;
+            for k in keys {
+                if let Ok(r) = self.hget_model::<Runner>(db, &k).await {
+                    out.push(r);
+                }
+            }
+            if next == 0 {
+                break;
+            }
+            cursor = next;
+        }
+        Ok(out)
+    }
+
+    // -----------------------------
+    // Global registry (DB 0) for Context IDs
+    // -----------------------------
+
+    /// Register a context id in the global set "contexts" stored in DB 0.
+    pub async fn register_context_id(&self, id: u32) -> Result<()> {
+        let mut cm = self.manager_for_db(0).await?;
+        let _: i64 = redis::cmd("SADD")
+            .arg("contexts")
+            .arg(id)
+            .query_async(&mut cm)
+            .await
+            .map_err(|e| {
+                error!(db=0, context_id=%id, error=%e, "SADD contexts failed");
+                e
+            })?;
+        Ok(())
+    }
+
+    /// List all registered context ids from the global set in DB 0.
+    pub async fn list_context_ids(&self) -> Result<Vec<u32>> {
+        let mut cm = self.manager_for_db(0).await?;
+        // Using SMEMBERS and parsing into u32
+        let vals: Vec<String> = redis::cmd("SMEMBERS")
+            .arg("contexts")
+            .query_async(&mut cm)
+            .await
+            .map_err(|e| {
+                error!(db=0, error=%e, "SMEMBERS contexts failed");
+                e
+            })?;
+        let mut out = Vec::with_capacity(vals.len());
+        for v in vals {
+            if let Ok(n) = v.parse::<u32>() {
+                out.push(n);
+            }
+        }
+        out.sort_unstable();
+        Ok(out)
+    }
 }