refactor: remove delegation stub and double-loop

- Remove runAgentLoop → runAgentLoopImpl indirection: rename
  runAgentLoopImpl back to runAgentLoop in loop_run.go, delete the
  1-line stub from loop.go
- Remove registerAllOrchestrationTools double-loop: restore al
  parameter to registerSharedTools and call registerOrchestrationTools
  inline in the same agent loop

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

pkg/agent/loop.go

@@ -155,11 +155,8 @@ func NewAgentLoop(
 	// Initialize fork-specific fields (stats, sessions, orchestration, gcLoop).
 	al.initLoopExt(cfg, registry, len(enableStats) > 0 && enableStats[0])
 
-	// Register shared tools to all agents.
-	registerSharedTools(cfg, msgBus, registry, provider)
-
-	// Register fork-specific orchestration tools (needs al for reporter injection).
-	al.registerAllOrchestrationTools(cfg, registry, provider, msgBus)
+	// Register shared tools to all agents (needs al for orchestration reporter).
+	registerSharedTools(cfg, msgBus, registry, provider, al)
 
 	return al
 }
@@ -170,6 +167,7 @@ func registerSharedTools(
 	msgBus *bus.MessageBus,
 	registry *AgentRegistry,
 	provider providers.LLMProvider,
+	al *AgentLoop,
 ) {
 	for _, agentID := range registry.ListAgentIDs() {
 		agent, ok := registry.GetAgent(agentID)
@@ -299,6 +297,9 @@ func registerSharedTools(
 			}
 		}
 
+		// Orchestration tools (spawn, subagent, answer, review_plan)
+		registerOrchestrationTools(cfg, agent, agentID, registry, provider, msgBus, al)
+
 		// Update context builder with the complete tools registry
 		agent.ContextBuilder.SetToolsRegistry(agent.Tools)
 	}
@@ -642,8 +643,7 @@ func (al *AgentLoop) ReloadProviderAndConfig(
 	}
 
 	// Ensure shared tools are re-registered on the new registry
-	registerSharedTools(cfg, al.bus, registry, provider)
-	al.registerAllOrchestrationTools(cfg, registry, provider, al.bus)
+	registerSharedTools(cfg, al.bus, registry, provider, al)
 
 	// Atomically swap the config and registry under write lock
 	// This ensures readers see a consistent pair
@@ -1094,10 +1094,6 @@ func (al *AgentLoop) withTelegramThread(channel, chatID string, threadID int) st
 	return fmt.Sprintf("%s/%d", baseChatID, threadID)
 }
 
-func (al *AgentLoop) runAgentLoop(ctx context.Context, agent *AgentInstance, opts processOptions) (string, error) {
-	return al.runAgentLoopImpl(ctx, agent, opts)
-}
-
 func (al *AgentLoop) targetReasoningChannelID(channelName string) (chatID string) {
 	if al.channelManager == nil {
 		return ""

pkg/agent/loop_ext.go

@@ -107,24 +107,6 @@ func (al *AgentLoop) SetHeartbeatThreadUpdater(fn func(int)) {
 	al.onHeartbeatThreadUpdate = fn
 }
 
-// registerAllOrchestrationTools iterates all agents and registers orchestration
-// tools for those with subagents enabled. Called from NewAgentLoop after
-// registerSharedTools, keeping the upstream function signature clean.
-func (al *AgentLoop) registerAllOrchestrationTools(
-	cfg *config.Config,
-	registry *AgentRegistry,
-	provider providers.LLMProvider,
-	msgBus *bus.MessageBus,
-) {
-	for _, agentID := range registry.ListAgentIDs() {
-		agent, ok := registry.GetAgent(agentID)
-		if !ok {
-			continue
-		}
-		registerOrchestrationTools(cfg, agent, agentID, registry, provider, msgBus, al)
-	}
-}
-
 // registerOrchestrationTools registers spawn, subagent, answer, and review_plan
 // tools for agents with orchestration enabled.
 func registerOrchestrationTools(

pkg/agent/loop_run.go

@@ -19,9 +19,8 @@ import (
 	"github.com/sipeed/picoclaw/pkg/utils"
 )
 
-// runAgentLoopImpl is the full implementation of runAgentLoop, extracted
-// to keep loop.go minimal and reduce upstream merge conflicts.
-func (al *AgentLoop) runAgentLoopImpl(ctx context.Context, agent *AgentInstance, opts processOptions) (string, error) {
+// runAgentLoop is the main message processing loop for a single agent session.
+func (al *AgentLoop) runAgentLoop(ctx context.Context, agent *AgentInstance, opts processOptions) (string, error) {
 	// -1. Acquire per-session lock to prevent concurrent access on the same session
 
 	if !al.acquireSessionLock(ctx, opts.SessionKey) {