Show [migrated] marker and summary in migrate-pr

Interactive picker now marks already-migrated PRs. All modes (--all,
explicit numbers, interactive) track and display success/fail/skip
counts at the end.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

bin/josh-sync

@@ -735,6 +735,26 @@ cmd_migrate_pr() {
 
   log "INFO" "Archived repo: ${archived_api}"
 
+  # Load already-migrated PR numbers for skip detection and display
+  local migrated_numbers
+  migrated_numbers=$(echo "$onboard_state" | jq -r '[.migrated_prs // [] | .[].old_number] | map(tostring) | .[]')
+
+  # Counters for summary
+  local migrated=0 failed=0 skipped=0
+
+  # Helper: attempt migration of one PR with counting
+  _try_migrate() {
+    local num="$1"
+    if echo "$migrated_numbers" | grep -qx "$num"; then
+      log "INFO" "PR #${num} already migrated — skipping"
+      skipped=$((skipped + 1))
+    elif migrate_one_pr "$num"; then
+      migrated=$((migrated + 1))
+    else
+      failed=$((failed + 1))
+    fi
+  }
+
   if [ "$all" = true ]; then
     # Migrate all open PRs from archived repo
     local prs
@@ -744,14 +764,14 @@ cmd_migrate_pr() {
     count=$(echo "$prs" | jq 'length')
     log "INFO" "Found ${count} open PR(s) on archived repo"
 
-    echo "$prs" | jq -r '.[] | .number' | while read -r num; do
-      migrate_one_pr "$num" || true
-    done
+    while read -r num; do
+      _try_migrate "$num"
+    done < <(echo "$prs" | jq -r '.[] | .number')
 
   elif [ ${#pr_numbers[@]} -gt 0 ]; then
     # Migrate specific PR numbers
     for num in "${pr_numbers[@]}"; do
-      migrate_one_pr "$num" || true
+      _try_migrate "$num"
     done
 
   else
@@ -767,26 +787,33 @@ cmd_migrate_pr() {
       return
     fi
 
+    # Display PRs with [migrated] marker for already-processed ones
     echo "" >&2
     echo "Open PRs on archived repo:" >&2
-    echo "$prs" | jq -r '.[] | "  #\(.number): \(.title) (\(.base.ref) <- \(.head.ref))"' >&2
+    while IFS=$'\t' read -r num title base_ref head_ref; do
+      if echo "$migrated_numbers" | grep -qx "$num"; then
+        echo "  #${num}: ${title} (${base_ref} <- ${head_ref}) [migrated]" >&2
+      else
+        echo "  #${num}: ${title} (${base_ref} <- ${head_ref})" >&2
+      fi
+    done < <(echo "$prs" | jq -r '.[] | "\(.number)\t\(.title)\t\(.base.ref)\t\(.head.ref)"')
     echo "" >&2
     echo "Enter PR numbers to migrate (space-separated), or 'all':" >&2
     local selection
     read -r selection
 
     if [ "$selection" = "all" ]; then
-      echo "$prs" | jq -r '.[] | .number' | while read -r num; do
-        migrate_one_pr "$num" || true
-      done
+      while read -r num; do
+        _try_migrate "$num"
+      done < <(echo "$prs" | jq -r '.[] | .number')
     else
       for num in $selection; do
-        migrate_one_pr "$num" || true
+        _try_migrate "$num"
       done
     fi
   fi
 
-  log "INFO" "PR migration complete"
+  log "INFO" "Migration complete: ${migrated} migrated, ${failed} failed, ${skipped} skipped"
 }
 
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