dbus: add GetPlan, SetPlan, GetSystemPrompt, GetContextSize, GetPreviousPrompt, Compact, ClearContext

Closes remaining feature gaps vs 9p interface.

main.go

@@ -33,14 +33,16 @@ const (
 
 // managedSession wraps a Core with its context and metadata.
 type managedSession struct {
-	core   agent.Core
-	ctx    context.Context
-	cancel context.CancelFunc
-	id     string
-	agent  string
-	log    []byte
-	logMu  sync.Mutex
-	peers  map[string]bool
+	core       agent.Core
+	ctx        context.Context
+	cancel     context.CancelFunc
+	id         string
+	agent      string
+	log        []byte
+	logMu      sync.Mutex
+	peers      map[string]bool
+	plan       string
+	prevPrompt string
 }
 
 // chatEmitter batches ChatUpdated D-Bus signals to avoid flooding the bus.
@@ -369,6 +371,7 @@ func (m *SessionManager) Submit(sessionID, prompt string) (bool, *dbus.Error) {
 		return false, nil
 	}
 
+	sess.prevPrompt = prompt
 	go sess.core.Submit(sess.ctx, prompt)
 	return true, nil
 }
@@ -519,6 +522,85 @@ func (m *SessionManager) GetContext(sessionID string) (string, *dbus.Error) {
 	return result, nil
 }
 
+// --- Plan/scratchpad ---
+
+func (m *SessionManager) GetPlan(sessionID string) (string, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return "", nil
+	}
+	return sess.plan, nil
+}
+
+func (m *SessionManager) SetPlan(sessionID, plan string) (bool, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return false, nil
+	}
+	sess.plan = plan
+	return true, nil
+}
+
+// --- System prompt / context size / previous prompt ---
+
+func (m *SessionManager) GetSystemPrompt(sessionID string) (string, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return "", nil
+	}
+	return sess.core.SystemPrompt(), nil
+}
+
+func (m *SessionManager) GetContextSize(sessionID string) (string, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return "", nil
+	}
+	return sess.core.CtxSz(), nil
+}
+
+func (m *SessionManager) GetPreviousPrompt(sessionID string) (string, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return "", nil
+	}
+	return sess.prevPrompt, nil
+}
+
+// --- Compact / Clear ---
+
+func (m *SessionManager) Compact(sessionID string) (bool, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return false, nil
+	}
+	sess.core.Submit(sess.ctx, "/compact")
+	return true, nil
+}
+
+func (m *SessionManager) ClearContext(sessionID string) (bool, *dbus.Error) {
+	m.mu.RLock()
+	sess, ok := m.sessions[sessionID]
+	m.mu.RUnlock()
+	if !ok {
+		return false, nil
+	}
+	sess.core.Submit(sess.ctx, "/clear")
+	return true, nil
+}
+
 // --- Backends/models/agents ---
 
 func (m *SessionManager) ListBackends() ([]string, *dbus.Error) {
@@ -1356,6 +1438,35 @@ const introspectXML = `<node>
       <arg name="prompt" type="s" direction="in"/>
       <arg name="success" type="b" direction="out"/>
     </method>
+    <method name="GetPlan">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="plan" type="s" direction="out"/>
+    </method>
+    <method name="SetPlan">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="plan" type="s" direction="in"/>
+      <arg name="success" type="b" direction="out"/>
+    </method>
+    <method name="GetSystemPrompt">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="result" type="s" direction="out"/>
+    </method>
+    <method name="GetContextSize">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="result" type="s" direction="out"/>
+    </method>
+    <method name="GetPreviousPrompt">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="result" type="s" direction="out"/>
+    </method>
+    <method name="Compact">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="success" type="b" direction="out"/>
+    </method>
+    <method name="ClearContext">
+      <arg name="session_id" type="s" direction="in"/>
+      <arg name="success" type="b" direction="out"/>
+    </method>
     <method name="Generate">
       <arg name="prompt" type="s" direction="in"/>
       <arg name="system" type="s" direction="in"/>