From 72c4066210b58a7f76b76f6d53e7223a33177a27 Mon Sep 17 00:00:00 2001
From: dj-oyu <68707227+dj-oyu@users.noreply.github.com>
Date: Tue, 24 Feb 2026 17:16:59 +0900
Subject: [PATCH] feat: capture last system prompt sent to LLM for Mini App
 display

GetSystemPrompt() now returns the exact system prompt that was last sent
to the LLM provider (including summary, channel info, and background
preamble), instead of rebuilding from current state which may differ.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
---
 pkg/agent/loop.go | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index 20b806a22..4c2f8c4bc 100644
--- a/pkg/agent/loop.go
+++ b/pkg/agent/loop.go
@@ -90,6 +90,7 @@ type AgentLoop struct {
 	sessionLocks     sync.Map // sessionKey → *sessionSemaphore
 	activeTasks      sync.Map // sessionKey → *activeTask
 	sessions         *SessionTracker
+	lastSystemPrompt atomic.Value // string — last system prompt sent to LLM
 	OnStateChange    func() // called on plan/session/skills mutations
 	OnUserMessage    func() // called when a real user message is processed
 }
@@ -810,6 +811,9 @@ func (al *AgentLoop) runAgentLoop(ctx context.Context, agent *AgentInstance, opt
 	// 1. Update tool contexts
 	al.updateToolContexts(agent, opts.Channel, opts.ChatID)
 
+	// 1a. Set session-specific working directory for bootstrap file lookup
+	agent.ContextBuilder.SetWorkDir(agent.EffectiveWorkspace(opts.SessionKey))
+
 	// 1b. Inject peer session awareness into system prompt
 	projectPath := agent.ContextBuilder.GetPlanWorkDir()
 	if projectPath == "" {
@@ -904,6 +908,11 @@ func (al *AgentLoop) runAgentLoop(ctx context.Context, agent *AgentInstance, opt
 		al.stats.RecordPrompt()
 	}
 
+	// Capture the finalized system prompt for Mini App inspection
+	if len(messages) > 0 {
+		al.lastSystemPrompt.Store(messages[0].Content)
+	}
+
 	// 5. Run LLM iteration loop
 	finalContent, iteration, err := al.runLLMIteration(ctx, agent, messages, opts, task, preStatus)
 	if err != nil {
@@ -2450,6 +2459,33 @@ func (al *AgentLoop) GetSessionStats() *stats.Stats {
 	return &s
 }
 
+// GetContextInfo returns the bootstrap file resolution and directory context for the default agent.
+func (al *AgentLoop) GetContextInfo() (workDir, planWorkDir, workspace string, bootstrap []BootstrapFileInfo) {
+	agent := al.registry.GetDefaultAgent()
+	if agent == nil {
+		return "", "", "", nil
+	}
+	workspace = agent.Workspace
+	planWorkDir = agent.ContextBuilder.GetPlanWorkDir()
+	workDir = agent.ContextBuilder.workDir
+	bootstrap = agent.ContextBuilder.ResolveBootstrapPaths()
+	return
+}
+
+// GetSystemPrompt returns the system prompt last sent to the LLM.
+// Falls back to building from current state if no LLM call has occurred yet.
+func (al *AgentLoop) GetSystemPrompt() string {
+	if v := al.lastSystemPrompt.Load(); v != nil {
+		return v.(string)
+	}
+	// Fallback: no LLM call yet — build from current state
+	agent := al.registry.GetDefaultAgent()
+	if agent == nil {
+		return ""
+	}
+	return agent.ContextBuilder.BuildSystemPrompt()
+}
+
 // formatMessagesForLog formats messages for logging
 func formatMessagesForLog(messages []providers.Message) string {
 	if len(messages) == 0 {