refactor: extract context.go fork insertions to context_ext.go

Move orchestration identity overrides to extIdentityOverrides() and
orchestration guidance + peer note injection to extPromptSections().
getIdentity and BuildSystemPrompt now call these ext methods instead
of inlining the fork-specific logic.

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

pkg/agent/context.go

@@ -89,32 +89,14 @@ func (cb *ContextBuilder) getIdentity() string {
 	// Build tools section dynamically
 	toolsSection := cb.buildToolsSection()
 
-	// Build prompt with optional orchestration banner
+	// Orchestration overrides (banner, identity, executing rule)
-	var prompt string
+	prompt, identity, executingRule := cb.extIdentityOverrides()
-	if cb.orchestrationEnabled {
+	if identity == "" {
-		prompt = ` /_/_/_/_/_/_/_/_/_/_/_/_/_/_/
+		identity = "a helpful AI assistant"
-
- O R C H E S T R A  M O D E
-
-/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
-
-
-
-`
 	}
-
+	if executingRule == "" {
-	// Conditional identity and plan executing rule for orchestration mode
+		executingRule = `Work through the current Phase's steps.
-	identity := "a helpful AI assistant"
-	executingRule := `Work through the current Phase's steps.
      Mark each "- [x]" via edit_file. The system will auto-advance phases.`
-	if cb.orchestrationEnabled {
-		identity = "a conductor AI agent that orchestrates subagents"
-		executingRule = `Delegate the current Phase's steps to subagents using spawn.
-     For each step: spawn a subagent with the appropriate preset (scout for investigation,
-     coder for implementation, analyst for review). Spawn multiple independent steps in parallel.
-     When a subagent completes, mark "- [x]" via edit_file and record findings in
-     ## Orchestration > Findings in MEMORY.md.
-     Only do a step inline if it's a single quick tool call (e.g., reading one file).`
 	}
 
 	return fmt.Sprintf(prompt+`# picoclaw 🦞 (%s)
@@ -223,12 +205,8 @@ func (cb *ContextBuilder) BuildSystemPrompt() string {
 	// Core identity section
 	parts = append(parts, cb.getIdentity())
 
-	// Orchestration guidance — injected only when spawn tool is registered
+	// Fork-specific prompt sections (orchestration guidance, peer note)
-	if cb.tools != nil {
+	parts = append(parts, cb.extPromptSections()...)
-		if _, hasSpawn := cb.tools.Get("spawn"); hasSpawn {
-			parts = append(parts, orchestrationGuidance)
-		}
-	}
 
 	// Bootstrap files
 	bootstrapContent := cb.LoadBootstrapFiles()
@@ -253,11 +231,6 @@ The following skills extend your capabilities. To use a skill, read its SKILL.md
 		}
 	}
 
-	// Peer session coordination
-	if cb.peerNote != "" {
-		parts = append(parts, "## Active Sessions\n\n"+cb.peerNote)
-	}
-
 	// Memory context
 	memoryContext := cb.memory.GetMemoryContext()
 	if memoryContext != "" {

pkg/agent/context_ext.go

@@ -33,6 +33,53 @@ func (cb *ContextBuilder) SetOrchestrationEnabled(enabled bool) {
 	cb.orchestrationEnabled = enabled
 }
 
+// extIdentityOverrides returns the orchestration-specific overrides for
+// getIdentity: banner prefix, identity string, and plan executing rule.
+// When orchestration is disabled, all return values are empty strings.
+func (cb *ContextBuilder) extIdentityOverrides() (banner, identity, executingRule string) {
+	if !cb.orchestrationEnabled {
+		return "", "", ""
+	}
+
+	banner = ` /_/_/_/_/_/_/_/_/_/_/_/_/_/_/
+
+ O R C H E S T R A  M O D E
+
+/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
+
+
+
+`
+	identity = "a conductor AI agent that orchestrates subagents"
+	executingRule = `Delegate the current Phase's steps to subagents using spawn.
+     For each step: spawn a subagent with the appropriate preset (scout for investigation,
+     coder for implementation, analyst for review). Spawn multiple independent steps in parallel.
+     When a subagent completes, mark "- [x]" via edit_file and record findings in
+     ## Orchestration > Findings in MEMORY.md.
+     Only do a step inline if it's a single quick tool call (e.g., reading one file).`
+	return banner, identity, executingRule
+}
+
+// extPromptSections returns fork-specific prompt sections to append to
+// BuildSystemPrompt: orchestration guidance and peer session note.
+func (cb *ContextBuilder) extPromptSections() []string {
+	var sections []string
+
+	// Orchestration guidance — injected only when spawn tool is registered
+	if cb.tools != nil {
+		if _, hasSpawn := cb.tools.Get("spawn"); hasSpawn {
+			sections = append(sections, orchestrationGuidance)
+		}
+	}
+
+	// Peer session coordination
+	if cb.peerNote != "" {
+		sections = append(sections, "## Active Sessions\n\n"+cb.peerNote)
+	}
+
+	return sections
+}
+
 // Memory returns the underlying MemoryStore for direct plan queries.
 func (cb *ContextBuilder) Memory() *MemoryStore {
 	return cb.memory