fix(context): show both summarize and compress thresholds in /context

The /context command previously showed only the hard budget compression
threshold (contextWindow - maxTokens), which confused users who expected
to see the soft summarization trigger from summarize_token_percent.

This commit adds SummarizeAtTokens alongside the existing CompressAtTokens
so that both thresholds are visible:

- Compress at: contextWindow - maxTokens (hard budget, triggers proactive
  compression when exceeded)
- Summarize at: contextWindow * summarizeTokenPercent / 100 (soft trigger,
  matches maybeSummarize's threshold)

The fix updates the /context command output, the Web UI popover, and the
pico channel WebSocket payload.

Fixes #2968

pkg/agent/agent_command.go

@@ -353,6 +353,7 @@ func (al *AgentLoop) buildCommandsRuntime(
 				UsedTokens:        usage.UsedTokens,
 				TotalTokens:       usage.TotalTokens,
 				CompressAtTokens:  usage.CompressAtTokens,
+				SummarizeAtTokens: usage.SummarizeAtTokens,
 				UsedPercent:       usage.UsedPercent,
 				MessageCount:      len(history),
 			}

pkg/agent/context_usage.go

@@ -61,6 +61,13 @@ func computeContextUsage(agent *AgentInstance, sessionKey string) *bus.ContextUs
 	// proactive trigger (msgTokens + toolTokens + maxTokens > contextWindow).
 	compressAt := effectiveWindow
 
+	// summarizeAt = soft summarization trigger: matches maybeSummarize's
+	// threshold (contextWindow * SummarizeTokenPercent / 100).
+	summarizeAt := contextWindow * agent.SummarizeTokenPercent / 100
+	if summarizeAt <= 0 {
+		summarizeAt = compressAt
+	}
+
 	usedPercent := 0
 	if compressAt > 0 {
 		usedPercent = usedTokens * 100 / compressAt
@@ -73,6 +80,7 @@ func computeContextUsage(agent *AgentInstance, sessionKey string) *bus.ContextUs
 		UsedTokens:        usedTokens,
 		TotalTokens:       contextWindow,
 		CompressAtTokens:  compressAt,
+		SummarizeAtTokens: summarizeAt,
 		UsedPercent:       usedPercent,
 	}
 }

pkg/bus/types.go

@@ -66,8 +66,9 @@ type OutboundScope struct {
 type ContextUsage struct {
 	UsedTokens        int `json:"used_tokens"`
 	TotalTokens       int `json:"total_tokens"`        // model context window
-	CompressAtTokens int `json:"compress_at_tokens"` // threshold that triggers compression
+	CompressAtTokens  int `json:"compress_at_tokens"`  // hard budget compression threshold (contextWindow - maxTokens)
-	UsedPercent      int `json:"used_percent"`       // 0-100
+	SummarizeAtTokens int `json:"summarize_at_tokens"` // soft summarization trigger (contextWindow * summarizeTokenPercent / 100)
+	UsedPercent       int `json:"used_percent"`        // 0-100, relative to compressAt
 }
 
 type OutboundMessage struct {

pkg/channels/pico/pico.go

@@ -1397,6 +1397,7 @@ func setContextUsagePayload(payload map[string]any, u *bus.ContextUsage) {
 		"used_tokens":         u.UsedTokens,
 		"total_tokens":        u.TotalTokens,
 		"compress_at_tokens":  u.CompressAtTokens,
+		"summarize_at_tokens": u.SummarizeAtTokens,
 		"used_percent":        u.UsedPercent,
 	}
 }

pkg/commands/cmd_context.go

@@ -29,14 +29,16 @@ func formatContextStats(s *ContextStats) string {
 		remaining = 0
 	}
 	usedWindowPercent := s.UsedTokens * 100 / max(s.TotalTokens, 1)
-	return fmt.Sprintf(
+	msg := fmt.Sprintf(
-		"Context usage  \nMessages: %d  \nUsed: ~%d / %d tokens (%d%%)  \nCompress at: %d tokens  \nCompression progress: %d%%  \nRemaining: ~%d tokens",
+		"Context usage  \nMessages: %d  \nUsed: ~%d / %d tokens (%d%%)  \nCompress at: %d tokens  \nSummarize at: %d tokens  \nCompression progress: %d%%  \nRemaining: ~%d tokens",
 		s.MessageCount,
 		s.UsedTokens,
 		s.TotalTokens,
 		usedWindowPercent,
 		s.CompressAtTokens,
+		s.SummarizeAtTokens,
 		s.UsedPercent,
 		remaining,
 	)
+	return msg
 }

pkg/commands/runtime.go

@@ -31,7 +31,8 @@ type MCPToolInfo struct {
 type ContextStats struct {
 	UsedTokens        int
 	TotalTokens       int // model context window
-	CompressAtTokens int // compression threshold
+	CompressAtTokens  int // hard budget compression threshold
+	SummarizeAtTokens int // soft summarization trigger
 	UsedPercent       int // 0-100
 	MessageCount      int
 }

web/frontend/src/components/chat/context-usage-ring.tsx

@@ -145,6 +145,23 @@ export function ContextUsageRing({
             />
           </div>
 
+          <div className="mt-2 space-y-0.5">
+            <div className="flex items-center justify-between text-[10px]">
+              <span className="text-muted-foreground">Compress at</span>
+              <span className="tabular-nums">
+                {formatTokens(usage.compress_at_tokens)}
+              </span>
+            </div>
+            {usage.summarize_at_tokens != null && usage.summarize_at_tokens > 0 && (
+              <div className="flex items-center justify-between text-[10px]">
+                <span className="text-muted-foreground">Summarize at</span>
+                <span className="tabular-nums">
+                  {formatTokens(usage.summarize_at_tokens)}
+                </span>
+              </div>
+            )}
+          </div>
+
           <button
             type="button"
             onClick={handleDetail}

web/frontend/src/features/chat/protocol.ts

@@ -79,6 +79,7 @@ function parseContextUsage(
     used_tokens: used,
     total_tokens: total,
     compress_at_tokens: Number(obj.compress_at_tokens) || 0,
+    summarize_at_tokens: obj.summarize_at_tokens != null ? Number(obj.summarize_at_tokens) : undefined,
     used_percent: Number(obj.used_percent) || 0,
   }
 }

web/frontend/src/store/chat.ts

@@ -53,6 +53,7 @@ export interface ContextUsage {
   used_tokens: number
   total_tokens: number
   compress_at_tokens: number
+  summarize_at_tokens?: number
   used_percent: number
 }