enable prealloc

Find slice declarations that could potentially be pre-allocated.

Signed-off-by: Kai Xia <kaix+github@fastmail.com>

.golangci.yaml

@@ -53,7 +53,6 @@ linters:
     - nilnil
     - paralleltest
     - perfsprint
-    - prealloc
     - predeclared
     - revive
     - staticcheck

pkg/agent/loop.go

@@ -800,7 +800,7 @@ func (al *AgentLoop) forceCompression(agent *AgentInstance, sessionKey string) {
 	droppedCount := mid
 	keptConversation := conversation[mid:]
 
-	newHistory := make([]providers.Message, 0)
+	newHistory := make([]providers.Message, 0, 1+len(keptConversation)+1)
 
 	// Append compression note to the original system prompt instead of adding a new system message
 	// This avoids having two consecutive system messages which some APIs (like Zhipu) reject

pkg/logger/logger.go

@@ -153,7 +153,7 @@ func formatComponent(component string) string {
 }
 
 func formatFields(fields map[string]any) string {
-	var parts []string
+	parts := make([]string, 0, len(fields))
 	for k, v := range fields {
 		parts = append(parts, fmt.Sprintf("%s=%v", k, v))
 	}