intrange 3→0 + modernize 5→3：for i:=0;i<len/N;i++ → range len/N（8 处）；time.Time 字段 omitempty→omitzero（wire 输出一致）；SplitSeq；min() 简化。刻意保留 lark.go omitzero（会改变 wire 行为）。

Result: {"status":"keep","total_issues":33,"golint_canonicalheader":0,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":32,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":45}

.auto/log.jsonl

@@ -4,3 +4,4 @@
 {"run":3,"commit":"b76f707","metric":74,"metrics":{"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":18,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":73,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":38},"status":"keep","description":"modernize 37→5（-32）：interface{}→any、内置 max/min、slices/maps 辅助、strings.Cut/SplitSeq、strings.Builder（修复 mail.go O(n²) 拼接）。逐 hunk 核对语义等价；omitzero 冲突修复被自动跳过（wire 格式不变）；手动清 4 处遗留 sort import + 2 处 QF1012。","timestamp":1786872502383,"segment":0,"confidence":17,"asi":{"hypothesis":"批量应用 modernize 自动修复（interface{}→any、max/min、slices.Sort/Contains、strings.Cut/SplitSeq、maps.Copy、strings.Builder）","insight":"golangci-lint --fix 会把 omitempty→omitzero 的冲突修复跳过（2个文件保留原 tag，wire 格式不变，好）；但 fixer 会遗留未使用的 sort import，需手动清 4 处；mail.go 的 Builder 迁移附带暴露 2 个 QF1012，顺手用 fmt.Fprintf 修复。全部修复语义等价，已逐项核对 diff","next_action_hint":"剩余 modernize=5 应为 omitzero 冲突文件；下轮先处理 perfsprint(18)：先看 --fix 是否安全再决定"}}
 {"run":4,"commit":"699e95f","metric":56,"metrics":{"golint_canonicalheader":8,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":3,"golint_wastedassign":7,"golint_total":55,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":47},"status":"keep","description":"perfsprint 18→0：strconv.Itoa/FormatInt/FormatUint/FormatBool 替代 fmt.Sprintf、无动词 fmt.Errorf→errors.New、纯字符串拼接。全部语义等价（已核对 diff）。修正 fixer 遗留的 import 问题（引入 goimports 统一整理）。","timestamp":1786872884713,"segment":0,"confidence":3.0588235294117645,"asi":{"hypothesis":"perfsprint --fix：%d→strconv.Itoa/FormatInt、%t→FormatBool、%s+const→拼接、无动词 Errorf→errors.New","insight":"重要：golangci-lint v2 fixer 的 import 管理不可靠（删除/添加 import 会出错，53 个文件中 5 处报 undefined）+ 遗留未用 import。已安装 goimports（repo make format 本来就需要它），对改动文件统一 goimports -w 修复。后续只要用 --fix 就要记得跑 goimports -w","next_action_hint":"剩余大头：errorlint(12)、canonicalheader(8)（usestdlibvars 同类）、recvcheck(7)、wastedassign(7)。errorlint 需手工逐处判断；先做 canonicalheader+usestdlibvars（自动可修复但要核对）"}}
 {"run":5,"commit":"d0414b4","metric":45,"metrics":{"golint_canonicalheader":0,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":0,"golint_wastedassign":7,"golint_total":44,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":38},"status":"keep","description":"canonicalheader 8→0 + usestdlibvars 3→0：header key 改为 Go 规范大小写（wire 格式本就如此，纯代码修正）、HTTP 方法常量替代字符串字面量。","timestamp":1786873098921,"segment":0,"confidence":2.1724137931034484,"asi":{"hypothesis":"canonicalheader+usestdlibvars --fix：Header key 统一规范大小写、GET/OPTIONS 等方法常量","insight":"GitHub header 修正前后的 wire 格式完全一致（Go 在 Set 时本来就会规范化），纯代码层面修正，零行为风险；下次遇到同类 100% 安全","next_action_hint":"剩余：errorlint(12) 需逐处人工判断（其中 3 处 err != context.Canceled、2 处 %v wrap、若干 ==/类型断言）；recvcheck(7) 是模型接收者一致性；wastedassign(7) 删 TODO 赋值；intrange(3)/modernize(5)/nilnil(3)/prealloc(3)/forcetypeassert(3)/errname(1)/eslint(1)"}}
+{"run":6,"commit":"ce28f63","metric":38,"metrics":{"golint_canonicalheader":0,"golint_errname":1,"golint_errorlint":12,"golint_forcetypeassert":3,"golint_gosec":0,"golint_intrange":3,"golint_modernize":5,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":3,"golint_recvcheck":7,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":37,"eslint_problems":1,"eslint_errors":0,"eslint_warnings":1,"tsc_errors":0,"measure_s":47},"status":"keep","description":"wastedassign 7→0：删除 7 处死初始化（snapshot.go 三连、push 三件套 content、format.go numStr），改 var 声明，零行为变化。","timestamp":1786873485497,"segment":0,"confidence":2.978723404255319,"asi":{"hypothesis":"wastedassign 7→0：删除 7 处死初始化（x := \"\" 后所有分支都赋值）改为 var 声明","insight":"replace 工具会归一化 replacement_text 的前导空白；对需要缩进的编辑直接用 sed/gofmt -w 处理更稳","next_action_hint":"剩余：errorlint(12)、recvcheck(7)、modernize(5)、intrange(3)、nilnil(3)、prealloc(3)、forcetypeassert(3)、errname(1)、eslint(1)"}}