feat: compact UI tree output and separate max_tokens from context_window

Reduce get_ui_tree verbosity by skipping invisible nodes, omitting
empty/default fields, and stripping common class prefixes. Lower
defaults to max_nodes=300, max_depth=15. Introduce a dedicated
context_window config field (default 128000) so summarization threshold
is independent of the API response token limit (max_tokens).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

android/app/src/main/java/io/picoclaw/android/assistant/ToolRequestHandler.kt

@@ -183,8 +183,8 @@ class ToolRequestHandler(
         val index = request.params?.get("index")?.jsonPrimitive?.intOrNull ?: 0
         val boundsX = request.params?.get("bounds_x")?.jsonPrimitive?.doubleOrNull
         val boundsY = request.params?.get("bounds_y")?.jsonPrimitive?.doubleOrNull
-        val maxDepth = request.params?.get("max_depth")?.jsonPrimitive?.intOrNull ?: 30
+        val maxDepth = request.params?.get("max_depth")?.jsonPrimitive?.intOrNull ?: 15
-        val maxNodes = request.params?.get("max_nodes")?.jsonPrimitive?.intOrNull ?: 2000
+        val maxNodes = request.params?.get("max_nodes")?.jsonPrimitive?.intOrNull ?: 300
 
         return try {
             withContext(Dispatchers.Main) { setOverlayVisibility(false) }
@@ -262,20 +262,32 @@ class ToolRequestHandler(
         nodeCount: IntArray
     ) {
         if (nodeCount[0] >= maxNodes) return
+        // Skip invisible nodes
+        if (!node.isVisibleToUser) return
         nodeCount[0]++
         val indent = "  ".repeat(depth)
         val bounds = Rect()
         node.getBoundsInScreen(bounds)
-        sb.appendLine(
+
-            "${indent}[${node.className}] " +
+        // Strip common class name prefixes
-                "text=${node.text ?: ""} " +
+        val className = node.className?.toString() ?: "View"
-                "desc=${node.contentDescription ?: ""} " +
+        val shortClass = className
-                "bounds=${bounds} " +
+            .removePrefix("android.widget.")
-                "clickable=${node.isClickable} " +
+            .removePrefix("android.view.")
-                "enabled=${node.isEnabled} " +
+
-                "visible=${node.isVisibleToUser} " +
+        sb.append("${indent}[${shortClass}]")
-                "id=${node.viewIdResourceName ?: ""}"
+
-        )
+        // Only output non-empty fields
+        node.text?.takeIf { it.isNotEmpty() }?.let { sb.append(" text=$it") }
+        node.contentDescription?.takeIf { it.isNotEmpty() }?.let { sb.append(" desc=$it") }
+        sb.append(" bounds=$bounds")
+        // Only output non-default values: clickable=true (default is false), enabled=false (default is true)
+        if (node.isClickable) sb.append(" clickable")
+        if (!node.isEnabled) sb.append(" enabled=false")
+        node.viewIdResourceName?.let { sb.append(" id=$it") }
+
+        sb.appendLine()
+
         if (depth >= maxDepth) {
             if (node.childCount > 0) {
                 sb.appendLine("${indent}  [truncated: ${node.childCount} children at depth $depth]")

config/config.example.json

@@ -6,6 +6,7 @@
       "restrict_to_workspace": true,
       "model": "glm-4.7",
       "max_tokens": 8192,
+      "context_window": 128000,
       "temperature": 0.7,
       "max_tool_iterations": 20
     }

pkg/agent/loop.go

@@ -36,7 +36,8 @@ type AgentLoop struct {
 	provider       providers.LLMProvider
 	workspace      string
 	model          string
-	contextWindow  int // Maximum context window size in tokens
+	maxTokens      int // Maximum tokens for API response
+	contextWindow  int // Maximum context window size in tokens (for summarization)
 	maxIterations  int
 	sessions       *session.SessionManager
 	state          *state.Manager
@@ -213,7 +214,8 @@ func NewAgentLoop(cfg *config.Config, msgBus *bus.MessageBus, provider providers
 		provider:       provider,
 		workspace:      workspace,
 		model:          cfg.Agents.Defaults.Model,
-		contextWindow:  cfg.Agents.Defaults.MaxTokens, // Restore context window for summarization
+		maxTokens:      cfg.Agents.Defaults.MaxTokens,
+		contextWindow:  cfg.Agents.Defaults.ContextWindow,
 		maxIterations:  cfg.Agents.Defaults.MaxToolIterations,
 		sessions:       sessionsManager,
 		state:          stateManager,
@@ -672,7 +674,7 @@ func (al *AgentLoop) runLLMIteration(ctx context.Context, messages []providers.M
 				"model":             al.model,
 				"messages_count":    len(messages),
 				"tools_count":       len(providerToolDefs),
-				"max_tokens":        8192,
+				"max_tokens":        al.maxTokens,
 				"temperature":       0.7,
 				"system_prompt_len": len(messages[0].Content),
 			})
@@ -692,7 +694,7 @@ func (al *AgentLoop) runLLMIteration(ctx context.Context, messages []providers.M
 		maxRetries := 2
 		for retry := 0; retry <= maxRetries; retry++ {
 			response, err = al.provider.Chat(ctx, messages, providerToolDefs, al.model, map[string]interface{}{
-				"max_tokens":  8192,
+				"max_tokens":  al.maxTokens,
 				"temperature": 0.7,
 			})
 

pkg/agent/loop_test.go

@@ -45,6 +45,7 @@ func TestRecordLastChannel(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -91,6 +92,7 @@ func TestRecordLastChatID(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -137,6 +139,7 @@ func TestNewAgentLoop_StateInitialized(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -174,6 +177,7 @@ func TestToolRegistry_ToolRegistration(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -221,6 +225,7 @@ func TestToolContext_Updates(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -253,6 +258,7 @@ func TestToolRegistry_GetDefinitions(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -298,6 +304,7 @@ func TestAgentLoop_GetStartupInfo(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -346,6 +353,7 @@ func TestCreateToolRegistry_ExecDisabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -386,6 +394,7 @@ func TestCreateToolRegistry_ExecEnabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -431,6 +440,7 @@ func TestCreateToolRegistry_I2CDisabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -469,6 +479,7 @@ func TestCreateToolRegistry_I2CEnabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -512,6 +523,7 @@ func TestCreateToolRegistry_SPIDisabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -550,6 +562,7 @@ func TestCreateToolRegistry_SPIEnabled(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -593,6 +606,7 @@ func TestAgentLoop_Stop(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -716,6 +730,7 @@ func TestToolResult_SilentToolDoesNotSendUserMessage(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -759,6 +774,7 @@ func TestToolResult_UserFacingToolDoesSendMessage(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -825,6 +841,7 @@ func TestAgentLoop_ContextExhaustionRetry(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -921,6 +938,7 @@ func TestRetryLoop_CancelledContextSkipsCompression(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -983,6 +1001,7 @@ func TestForceCompression_ToolGroupBoundary(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -1069,6 +1088,7 @@ func TestForceCompression_MidOnAssistantWithToolCalls(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},
@@ -1156,6 +1176,7 @@ func TestForceCompression_NoteUsesUserRole(t *testing.T) {
 				DataDir:           tmpDir,
 				Model:             "test-model",
 				MaxTokens:         4096,
+				ContextWindow:     128000,
 				MaxToolIterations: 10,
 			},
 		},

pkg/config/config.go

@@ -66,6 +66,7 @@ type AgentDefaults struct {
 	Provider            string  `json:"provider" env:"PICOCLAW_AGENTS_DEFAULTS_PROVIDER"`
 	Model               string  `json:"model" env:"PICOCLAW_AGENTS_DEFAULTS_MODEL"`
 	MaxTokens           int     `json:"max_tokens" env:"PICOCLAW_AGENTS_DEFAULTS_MAX_TOKENS"`
+	ContextWindow       int     `json:"context_window" env:"PICOCLAW_AGENTS_DEFAULTS_CONTEXT_WINDOW"`
 	Temperature         float64 `json:"temperature" env:"PICOCLAW_AGENTS_DEFAULTS_TEMPERATURE"`
 	MaxToolIterations   int     `json:"max_tool_iterations" env:"PICOCLAW_AGENTS_DEFAULTS_MAX_TOOL_ITERATIONS"`
 }
@@ -281,6 +282,7 @@ func DefaultConfig() *Config {
 				Provider:            "",
 				Model:               "glm-4.7",
 				MaxTokens:           8192,
+				ContextWindow:       128000,
 				Temperature:         0.7,
 				MaxToolIterations:   20,
 			},

pkg/tools/android.go

@@ -145,11 +145,11 @@ func (t *AndroidTool) Parameters() map[string]interface{} {
 			},
 			"max_depth": map[string]interface{}{
 				"type":        "integer",
-				"description": "Maximum traversal depth (for get_ui_tree, default 30)",
+				"description": "Maximum traversal depth (for get_ui_tree, default 15)",
 			},
 			"max_nodes": map[string]interface{}{
 				"type":        "integer",
-				"description": "Maximum number of nodes to output (for get_ui_tree, default 2000)",
+				"description": "Maximum number of nodes to output (for get_ui_tree, default 300)",
 			},
 		},
 		"required": []string{"action"},