From 4e6589d51f1a4ffddc320ceb55c281c884122c7d Mon Sep 17 00:00:00 2001
From: Kai Xia <kaix+github@fastmail.com>
Date: Wed, 25 Feb 2026 21:07:28 +1100
Subject: [PATCH] enable prealloc

Find slice declarations that could potentially be pre-allocated.

Signed-off-by: Kai Xia <kaix+github@fastmail.com>
---
 .golangci.yaml       | 1 -
 pkg/agent/loop.go    | 2 +-
 pkg/logger/logger.go | 2 +-
 3 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/.golangci.yaml b/.golangci.yaml
index 8dca46c15..ec17cb00e 100644
--- a/.golangci.yaml
+++ b/.golangci.yaml
@@ -53,7 +53,6 @@ linters:
     - nilnil
     - paralleltest
     - perfsprint
-    - prealloc
     - predeclared
     - revive
     - staticcheck
diff --git a/pkg/agent/loop.go b/pkg/agent/loop.go
index dbc4a9b87..540563b07 100644
--- a/pkg/agent/loop.go
+++ b/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
diff --git a/pkg/logger/logger.go b/pkg/logger/logger.go
index c14fbd464..56dc87a53 100644
--- a/pkg/logger/logger.go
+++ b/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))
 	}