diff --git a/.gitea/workflows/backup.yml b/.gitea/workflows/backup.yml
index 757d377..3fb93e8 100644
--- a/.gitea/workflows/backup.yml
+++ b/.gitea/workflows/backup.yml
@@ -31,7 +31,7 @@ jobs:
         run: |
           set -euo pipefail
           echo "Refreshing mirror repos on 172.16.10.191 ..."
-          ssh engdev@172.16.10.191 'set -euo pipefail; export GIT_PROGRESS_DELAY=0 GIT_FLUSH=1; shopt -s nullglob; for repo in *.git; do [ -d "${repo}" ] || continue; echo "Updating ${repo}"; (cd "${repo}" && git fetch --progress --mirror --prune); done'
+          ssh engdev@172.16.10.191 'set -euo pipefail; export GIT_PROGRESS_DELAY=0 GIT_FLUSH=1; shopt -s nullglob; for repo in *.git; do [ -d "${repo}" ] || continue; echo "Updating ${repo}"; (cd "${repo}" && git fetch --progress --prune --prune-tags origin "+refs/*:refs/*"); done'
 
       - name: Backup Branches (pre-scan → decision → execution)
         continue-on-error: true
@@ -259,7 +259,7 @@ jobs:
               fi
             else
               echo "Refreshing cache for ${source_repo}"
-              if ! git -C "${cache_dir}" fetch --progress --mirror --prune; then
+              if ! git -C "${cache_dir}" fetch --progress --prune --prune-tags origin "+refs/*:refs/*"; then
                 echo "::warning::Failed to refresh cache for ${source_repo} (${SOURCE_SSH_HOST}:${source_repo})"
                 return 1
               fi
@@ -594,60 +594,61 @@ jobs:
         if: always()
         run: |
           set -euo pipefail
-          REPORT_DIR="${REPORT_DIR:-${{ github.workspace }}/backup_reports}"
+          REPORT_DIR="${REPORT_DIR:-${GITHUB_WORKSPACE}/backup_reports}"
           TS="${REPORT_TS:-}"
           if [[ -z "${TS}" ]]; then
-            TS=$(ls -t ${REPORT_DIR}/decisions_*.log 2>/dev/null | head -1 | sed -E 's/.*decisions_([0-9_]+)\\.log/\\1/')
-          fi
-          if [[ -z "${TS}" ]]; then
-            echo "::error::No report timestamp found; cannot build report."
-            exit 1
+            TS=$(ls -t ${REPORT_DIR}/decisions_*.log 2>/dev/null | head -1 | sed -E 's/.*decisions_([0-9_]+)\.log/\1/')
           fi
           DECISIONS_LOG="${REPORT_DIR}/decisions_${TS}.log"
           TIMINGS_LOG="${REPORT_DIR}/timings_${TS}.log"
           REPORT_MD="${REPORT_DIR}/report_${TS}.md"
-          SOURCE_SSH_HOST="${SOURCE_SSH_HOST:-${{ env.SOURCE_SSH_HOST }}}"
-
-          if [[ ! -f "${DECISIONS_LOG}" || ! -f "${TIMINGS_LOG}" ]]; then
-            echo "::error::Missing decisions or timings log."
-            exit 1
-          fi
-
-          total=0; success=0; skip=0; error=0
-          while IFS='|' read -r sr br al rr sc tc dc st se de ee xe dt dexe nt; do
-            [[ -z "${sr}" ]] && continue
-            ((total++))
-            case "${st}" in
-              success) ((success++)) ;;
-              skip) ((skip++)) ;;
-              error) ((error++)) ;;
-            esac
-          done < "${TIMINGS_LOG}"
+          SOURCE_SSH_HOST="${SOURCE_SSH_HOST:-}"
 
           SUMMARY_TS=$(TZ=Asia/Seoul date '+%Y-%m-%d %H:%M:%S %Z')
+          total=0; success=0; skip=0; error=0
+          if [[ -f "${TIMINGS_LOG}" ]]; then
+            while IFS='|' read -r sr br al rr sc tc dc st se de ee xe dt dexe nt; do
+              [[ -z "${sr}" ]] && continue
+              ((total++))
+              case "${st}" in
+                success) ((success++)) ;;
+                skip) ((skip++)) ;;
+                error) ((error++)) ;;
+              esac
+            done < "${TIMINGS_LOG}"
+          fi
+
           {
             echo "# Git Backup Report"
             echo ""
             echo "- Generated: ${SUMMARY_TS}"
             echo "- Run ID: ${GITHUB_RUN_ID:-local}"
-            echo "- Source host: ${SOURCE_SSH_HOST}"
+            [[ -n "${SOURCE_SSH_HOST}" ]] && echo "- Source host: ${SOURCE_SSH_HOST}"
             echo "- Total: ${total} (success ${success}, skip ${skip}, error ${error})"
             echo ""
             echo "## Decisions (all)"
             echo "|source_repo|branch|alias|resolved_repo|source_commit|target_commit|decision|note|"
             echo "|---|---|---|---|---|---|---|---|"
-            while IFS='|' read -r sr br al rr sc tc dc nt; do
-              [[ -z "${sr}" ]] && continue
-              printf "|%s|%s|%s|%s|%s|%s|%s|%s|\n" "$sr" "$br" "$al" "$rr" "$sc" "$tc" "$dc" "$nt"
-            done < "${DECISIONS_LOG}"
+            if [[ -f "${DECISIONS_LOG}" ]]; then
+              while IFS='|' read -r sr br al rr sc tc dc nt; do
+                [[ -z "${sr}" ]] && continue
+                printf "|%s|%s|%s|%s|%s|%s|%s|%s|\n" "$sr" "$br" "$al" "$rr" "$sc" "$tc" "$dc" "$nt"
+              done < "${DECISIONS_LOG}"
+            else
+              echo "|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|"
+            fi
             echo ""
             echo "## Timings (all)"
             echo "|source_repo|branch|alias|resolved_repo|source_commit|target_commit|decision|status|start_epoch|decision_epoch|exec_start_epoch|exec_end_epoch|duration_total(s)|duration_exec(s)|note|"
             echo "|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|"
-            while IFS='|' read -r sr br al rr sc tc dc st se de ee xe dt dexe nt; do
-              [[ -z "${sr}" ]] && continue
-              printf "|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|\n" "$sr" "$br" "$al" "$rr" "$sc" "$tc" "$dc" "$st" "$se" "$de" "$ee" "$xe" "$dt" "$dexe" "$nt"
-            done < "${TIMINGS_LOG}"
+            if [[ -f "${TIMINGS_LOG}" ]]; then
+              while IFS='|' read -r sr br al rr sc tc dc st se de ee xe dt dexe nt; do
+                [[ -z "${sr}" ]] && continue
+                printf "|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|%s|\n" "$sr" "$br" "$al" "$rr" "$sc" "$tc" "$dc" "$st" "$se" "$de" "$ee" "$xe" "$dt" "$dexe" "$nt"
+              done < "${TIMINGS_LOG}"
+            else
+              echo "|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|(missing)|"
+            fi
             echo ""
           } > "${REPORT_MD}"
           echo "Report generated at ${REPORT_MD}"
diff --git a/.gitea/workflows/mirror.yml b/.gitea/workflows/mirror.yml
index 159321f..33284a8 100644
--- a/.gitea/workflows/mirror.yml
+++ b/.gitea/workflows/mirror.yml
@@ -29,7 +29,7 @@ jobs:
         run: |
           set -euo pipefail
           echo "Refreshing mirror repos on 172.16.10.191 ..."
-          ssh engdev@172.16.10.191 'set -euo pipefail; export GIT_PROGRESS_DELAY=0 GIT_FLUSH=1; shopt -s nullglob; for repo in *.git; do [ -d "${repo}" ] || continue; echo "Updating ${repo}"; (cd "${repo}" && git fetch --progress --mirror --prune); done'
+          ssh engdev@172.16.10.191 'set -euo pipefail; export GIT_PROGRESS_DELAY=0 GIT_FLUSH=1; shopt -s nullglob; for repo in *.git; do [ -d "${repo}" ] || continue; echo "Updating ${repo}"; (cd "${repo}" && git fetch --progress --prune --prune-tags origin "+refs/*:refs/*"); done'
 
       - name: Mirror Branches
         env: