Run claim-execute-upload loops concurrently in the worker agent

coordinator/internal/agent/setupui/server.go

@@ -377,6 +377,7 @@ type saveConfigRequest struct {
 	WorkerName     string   `json:"worker_name"`
 	CPUCount       int      `json:"cpu_count"`
 	MemoryMB       int      `json:"memory_mb"`
+	Concurrency    int      `json:"concurrency"`
 	TaskRunner     []string `json:"task_runner"`
 }
 
@@ -395,6 +396,7 @@ func (s *Server) handleSaveConfig(w http.ResponseWriter, r *http.Request) {
 		WorkerName:     strings.TrimSpace(req.WorkerName),
 		CPUCount:       req.CPUCount,
 		MemoryMB:       req.MemoryMB,
+		Concurrency:    req.Concurrency,
 		TaskRunner:     req.TaskRunner,
 	}
 	if file.CoordinatorURL == "" {
@@ -418,6 +420,9 @@ func (s *Server) handleSaveConfig(w http.ResponseWriter, r *http.Request) {
 	if file.CPUCount < 1 {
 		file.CPUCount = 1
 	}
+	if file.Concurrency < 1 {
+		file.Concurrency = 1
+	}
 	// The wizard UI bakes the venv python into the runner after an install;
 	// an API-driven or scripted flow may not, so the server guarantees it:
 	// workloads execute through scimesh's task runner, which lives in the venv.

coordinator/internal/agent/setupui/template.html

@@ -141,6 +141,7 @@ code{font-family:var(--mono);font-size:.86em}
           </div>
         </div>
         <div class="field" id="cpu-field" style="display:none"><label>CPU count</label><input id="in-cpu" type="number" min="1" value="1"></div>
+        <div class="field"><label>Concurrent task loops</label><input id="in-conc" type="number" min="1" max="64" value="1"><p class="hint">Process this many shards in parallel on this machine. Each loop runs its own task runner subprocess.</p></div>
         <div class="actions"><button class="btn btn-ghost" id="b2b">← Back</button><button class="btn btn-primary" id="b2">Continue →</button></div>
       </div>
     </div>
@@ -228,7 +229,8 @@ function draftConfig(){
     userservice_url:state.mode==='key'?$('in-users').value.trim():'',
     work_dir:$('in-dir').value.trim(),
     worker_name:$('in-name').value.trim(),
-    cpu_count:state.cpu==='custom'?parseInt($('in-cpu').value||'1',10):0
+    cpu_count:state.cpu==='custom'?parseInt($('in-cpu').value||'1',10):0,
+    concurrency:parseInt($('in-conc').value||'1',10)
   };
   if(state.venvPython)cfg.task_runner=[state.venvPython,'-m','scimesh.worker.task'];
   return cfg;