修复 geoip/runtime.go 真死代码：ensureServerMMDB 的 os.Stat 错误被 if-init 遮蔽，err != nil && !os.IsNotExist(err) 恒为 false（外层 err 恒 nil），防御检查从未生效；改为显式捕获 statErr，stat 非 not-exist 错误现在正确返回。基准新增第 4 维度 govet nilness+unusedwrite（文档化扩展），当前 0。

Result: {"status":"keep","total_issues":8,"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"golint_vetx_total":0,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":37}

.auto/log.jsonl

@@ -12,3 +12,4 @@
 {"run":11,"commit":"111d290","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":38},"status":"keep","description":"eslint 1→0：pages-source-card useEffect 补 t 依赖（next-intl 稳定引用）。modernize 补 1 处 time.Time omitzero。剩余 8 全部为刻意保留项。","timestamp":1786874578893,"segment":0,"confidence":4.3478260869565215,"asi":{"hypothesis":"eslint 1→0：useEffect 依赖数组补 t（next-intl useTranslations 返回稳定引用，安全）；modernize 补 1 处 time.Time omitempty→omitzero（输出一致）","insight":"modernize 剩余 3 处全部是嵌套 struct omitempty（client.go Release/Asset、lark.go Content）→ omitzero 会改变 wire，全部刻意保留。至此所有可安全修复的类别清零，剩余 8 个全部是有据可查的刻意保留项","next_action_hint":"剩余 8 全部刻意保留（errorlint 1 telegram、modernize 3 嵌套struct、nilnil 3 not-found、recvcheck 1 json）。下一轮做深化方向：测试代码质量（tests:false 之外）、或 golangci 附加 linter（gocritic 更多检查）作为新基准段"}}
 {"run":12,"commit":"e5f6b0a","metric":33,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":20,"golint_test_thelper":3,"golint_test_usetesting":2,"golint_test_total":25,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":37},"status":"keep","description":"基准扩展（文档化）：新增测试代码质量维度 25 处（testifylint 20 + thelper 3 + usetesting 2），生产代码 8 处刻意保留不变。新基线 total=33。","timestamp":1786874744438,"segment":0,"confidence":4.878048780487805,"asi":{"hypothesis":"扩展基准到测试代码质量维度（testifylint 20 + thelper 3 + usetesting 2 = 25）","insight":"刻意排除 paralleltest/tparallel（共享 DB/redis 状态 + 本环境无法跑测试，t.Parallel 有风险）—— 这是范围扩展（抬高门槛），不是 gaming；基准定义已写入 prompt.md","next_action_hint":"修 25 处测试问题：float-compare 3（InDelta）、require-error 3、encoded-compare 1（JSONEq）、empty 3、contains 1、error-is-as 3、len 3、go-require-in-handler 2、t.Helper 3、os.MkdirTemp→t.TempDir 2"}}
 {"run":13,"commit":"63a24da","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":39},"status":"keep","description":"测试代码质量 25→0：assert↔require 一致性（fail-fast）、float 精确比较→InDelta、Equal(\"\",x)→Empty、Equal(len)→Len、errors.Is/As→ErrorIs/ErrorAs、JSON 字符串→JSONEq、handler goroutine 内 require→assert（真健壮性修复）、t.Helper()、os.MkdirTemp→t.TempDir()（符合 repo AGENTS 约束）。","timestamp":1786875177918,"segment":0,"confidence":4.3478260869565215,"asi":{"hypothesis":"修完测试代码质量维度 25 处（testifylint 20 + thelper 3 + usetesting 2）","insight":"批量修复过程揭示 testifylint 默认 max-same-issues=3 会掩盖重复模式（len(entries) 出现 4+ 次、float64(3) 4 次），需 --max-issues-per-linter=0 反复收敛；全部修复语义中性（assert↔require 仅 fail-fast 差异，InDelta/JSONEq/Empty/Len/ErrorIs 等价断言，t.Helper/t.TempDir 纯改善）。go-require 类（handler 内 require→assert）是真正的健壮性修复","next_action_hint":"测试维度清零。生产代码剩余 8 全部刻意保留。可选深化：gocritic 更多子检查/staticcheck 更多（SA 系列）扫描、或 biome check 格式一次性提交、或前端 a11y（eslint jsx-a11y 已含于 next core-web-vitals 默认关闭项）"}}
+{"run":14,"commit":"65c02ef","metric":8,"metrics":{"golint_canonicalheader":0,"golint_errname":0,"golint_errorlint":1,"golint_exhaustive":0,"golint_forcetypeassert":0,"golint_gosec":0,"golint_intrange":0,"golint_modernize":3,"golint_nilnil":3,"golint_perfsprint":0,"golint_prealloc":0,"golint_recvcheck":1,"golint_usestdlibvars":0,"golint_wastedassign":0,"golint_total":8,"golint_test_testifylint":0,"golint_test_thelper":0,"golint_test_usetesting":0,"golint_test_total":0,"eslint_problems":0,"eslint_errors":0,"eslint_warnings":0,"tsc_errors":0,"measure_s":36},"status":"keep","description":"基准扩展 exhaustive（文档化）+ 12→0：枚举 switch 补显式 case（全部与现有 default 行为等价，fail-explicit 防未来枚举静默落入 default）；source_tasks.go 为控制复杂度合并两个等价校验条件。","timestamp":1786875548060,"segment":0,"confidence":4.25531914893617,"asi":{"hypothesis":"基准扩展 exhaustive（12 处枚举 switch 显式化）+ 全量修复","insight":"12 处全部是 default 已正确处理、缺显式 case 的类型；补显式 case 仅为 fail-explicit（未来枚举新增不会静默落入 default）。source_tasks 补 case 后 Execute 复杂度 20→21 触发 cyclop，合并两个 ActionInvalid 条件（逻辑等价）降回 19。cyclop 与 exhaustive 的张力：显式 case 也计入复杂度","next_action_hint":"剩余 8 全为刻意保留。可再深化：sloglint 全量、govet 附加分析器、或前端 jsx-a11y/next 规则已有覆盖。也可将剩余 8 处文档化后收尾总结"}}

.auto/measure.sh

@@ -33,6 +33,32 @@ while IFS= read -r line; do
 done <<< "$test_out"
 echo "METRIC golint_test_total=$golang_test_total"
 
+# ---------- Backend: govet extra analyzers (dead code / nil deref — real-bug finders) ----------
+cat > /tmp/govetx.yml <<'EOF'
+version: "2"
+linters:
+  default: none
+  enable:
+    - govet
+  settings:
+    govet:
+      enable:
+        - nilness
+        - unusedwrite
+EOF
+vetx_out=$(golangci-lint run --config /tmp/govetx.yml --max-issues-per-linter=0 2>&1 || true)
+rm -f /tmp/govetx.yml
+golang_vetx_total=0
+while IFS= read -r line; do
+  if [[ "$line" =~ ^\*\ ([a-zA-Z0-9_]+):\ ([0-9]+)$ ]]; then
+    name="${BASH_REMATCH[1]}"
+    n="${BASH_REMATCH[2]}"
+    golang_vetx_total=$((golang_vetx_total + n))
+    echo "METRIC golint_vetx_${name}=$n"
+  fi
+done <<< "$vetx_out"
+echo "METRIC golint_vetx_total=$golang_vetx_total"
+
 # ---------- Frontend: eslint (repo gate) ----------
 cd frontend
 eslint_out=$(pnpm exec eslint . --max-warnings 0 2>&1 || true)
@@ -50,6 +76,6 @@ tsc_errors=$(grep -cE "error TS" <<< "$tsc_out" || true)
 echo "METRIC tsc_errors=$tsc_errors"
 
 end=$(date +%s)
-total=$((golang_total + golang_test_total + eslint_problems + tsc_errors))
+total=$((golang_total + golang_test_total + golang_vetx_total + eslint_problems + tsc_errors))
 echo "METRIC total_issues=$total"
 echo "METRIC measure_s=$((end - start))"