OPC # 0006: OPC Git Trunk-Based management

ControlPlane.Api/Services/PromotionService.cs

@@ -91,7 +91,9 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
             ct.ThrowIfCancellationRequested();
 
             var branchName  = Ladder[i];
-            var branch     = repo.Branches[branchName];
+            // Always read from the remote tracking ref so the status reflects what is on origin,
+            // not the server's potentially-stale local branch pointer.
+            var branch      = repo.Branches[$"origin/{branchName}"];
 
             if (branch?.Tip is null)
             {
@@ -110,7 +112,7 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
 
             if (i + 1 < Ladder.Length)
             {
-                var nextBranch = repo.Branches[Ladder[i + 1]];
+                var nextBranch = repo.Branches[$"origin/{Ladder[i + 1]}"];
                 if (nextBranch?.Tip is not null)
                 {
                     var div = repo.ObjectDatabase.CalculateHistoryDivergence(tip, nextBranch.Tip);
@@ -220,9 +222,12 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
         var refSpecs = remote.FetchRefSpecs.Select(r => r.Specification).ToList();
         repo.Network.Fetch(remote.Name, refSpecs, MakeFetchOptions());
 
-        // 2. Resolve local branches
+        // 2. Resolve branches — always read from origin/ so we reflect what is actually on the remote,
-        var fromBranch = repo.Branches[from]
+        //    never the server's potentially-stale local branch pointers.
-            ?? throw new InvalidOperationException($"Branch '{from}' not found.");
+        var fromBranch = repo.Branches[$"origin/{from}"]
+            ?? throw new InvalidOperationException($"Remote branch 'origin/{from}' not found.");
+        // `to` is read locally because we need to mutate its ref and push — it is immediately
+        // fast-forwarded to origin/{to} in the next step so it is never stale when used.
         var toBranch = repo.Branches[to]
             ?? throw new InvalidOperationException($"Branch '{to}' not found.");
 
@@ -566,12 +571,13 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
 
             var branchName = Ladder[i];
             var srcName    = i > 0 ? Ladder[i - 1] : null; // predecessor branch (e.g. develop for staging)
-            var branch     = repo.Branches[branchName];
+            // Always read from origin/ tracking refs — never local branch pointers.
+            var branch     = repo.Branches[$"origin/{branchName}"];
 
             // ── Branch missing ──────────────────────────────────────────────
             if (branch?.Tip is null)
             {
-                var srcTip = srcName is not null ? repo.Branches[srcName]?.Tip?.Sha : null;
+                var srcTip = srcName is not null ? repo.Branches[$"origin/{srcName}"]?.Tip?.Sha : null;
                 checks.Add(new BranchConformanceCheck(
                     branchName, srcName,
                     ConformanceViolation.Missing,
@@ -592,7 +598,7 @@ public class PromotionService(IConfiguration config, ILogger<PromotionService> l
                 continue;
             }
 
-            var srcBranch = repo.Branches[srcName];
+            var srcBranch = repo.Branches[$"origin/{srcName}"];
             if (srcBranch?.Tip is null)
             {
                 // Source branch is itself missing — skip, it will be reported separately.