fix: enforce sequential metadata mirroring

src/lib/db/schema.ts

@@ -54,8 +54,8 @@ export const giteaConfigSchema = z.object({
     .enum(["skip", "reference", "full-copy"])
     .default("reference"),
   // Mirror options
-  issueConcurrency: z.number().int().min(1).default(3),
+  issueConcurrency: z.number().int().min(1).default(1),
-  pullRequestConcurrency: z.number().int().min(1).default(5),
+  pullRequestConcurrency: z.number().int().min(1).default(1),
   mirrorReleases: z.boolean().default(false),
   releaseLimit: z.number().default(10),
   mirrorMetadata: z.boolean().default(false),

src/lib/env-config-loader.ts

@@ -284,10 +284,10 @@ export async function initializeConfigFromEnv(): Promise<void> {
       releaseLimit: envConfig.mirror.releaseLimit ?? existingConfig?.[0]?.giteaConfig?.releaseLimit ?? 10,
       issueConcurrency: envConfig.mirror.issueConcurrency && envConfig.mirror.issueConcurrency > 0
         ? envConfig.mirror.issueConcurrency
-        : existingConfig?.[0]?.giteaConfig?.issueConcurrency ?? 3,
+        : existingConfig?.[0]?.giteaConfig?.issueConcurrency ?? 1,
       pullRequestConcurrency: envConfig.mirror.pullRequestConcurrency && envConfig.mirror.pullRequestConcurrency > 0
         ? envConfig.mirror.pullRequestConcurrency
-        : existingConfig?.[0]?.giteaConfig?.pullRequestConcurrency ?? 5,
+        : existingConfig?.[0]?.giteaConfig?.pullRequestConcurrency ?? 1,
       mirrorMetadata: envConfig.mirror.mirrorMetadata ?? (envConfig.mirror.mirrorIssues || envConfig.mirror.mirrorPullRequests || envConfig.mirror.mirrorLabels || envConfig.mirror.mirrorMilestones) ?? existingConfig?.[0]?.giteaConfig?.mirrorMetadata ?? false,
       mirrorIssues: envConfig.mirror.mirrorIssues ?? existingConfig?.[0]?.giteaConfig?.mirrorIssues ?? false,
       mirrorPullRequests: envConfig.mirror.mirrorPullRequests ?? existingConfig?.[0]?.giteaConfig?.mirrorPullRequests ?? false,

src/lib/gitea.ts

@@ -1592,11 +1592,17 @@ export const mirrorGitRepoIssuesToGitea = async ({
   // Import the processWithRetry function
   const { processWithRetry } = await import("@/lib/utils/concurrency");
 
-  const rawIssueConcurrency = config.giteaConfig?.issueConcurrency ?? 3;
+  const rawIssueConcurrency = config.giteaConfig?.issueConcurrency ?? 1;
   const issueConcurrencyLimit =
     Number.isFinite(rawIssueConcurrency)
       ? Math.max(1, Math.floor(rawIssueConcurrency))
-      : 3;
+      : 1;
+
+  if (issueConcurrencyLimit > 1) {
+    console.warn(
+      `[Issues] Concurrency is set to ${issueConcurrencyLimit}. This may lead to out-of-order issue creation in Gitea.`
+    );
+  }
 
   // Process issues in parallel with concurrency control
   await processWithRetry(
@@ -1670,10 +1676,19 @@ export const mirrorGitRepoIssuesToGitea = async ({
         (res) => res.data
       );
 
-      // Process comments in parallel with concurrency control
+      // Ensure comments are applied in chronological order to preserve discussion flow
-      if (comments.length > 0) {
+      const sortedComments = comments
+        .slice()
+        .sort(
+          (a, b) =>
+            new Date(a.created_at || 0).getTime() -
+            new Date(b.created_at || 0).getTime()
+        );
+
+      // Process comments sequentially to preserve historical ordering
+      if (sortedComments.length > 0) {
         await processWithRetry(
-          comments,
+          sortedComments,
           async (comment) => {
             await httpPost(
               `${config.giteaConfig!.url}/api/v1/repos/${giteaOwner}/${repoName}/issues/${createdIssue.data.number}/comments`,
@@ -1687,7 +1702,7 @@ export const mirrorGitRepoIssuesToGitea = async ({
             return comment;
           },
           {
-            concurrencyLimit: 5,
+            concurrencyLimit: 1,
             maxRetries: 2,
             retryDelay: 1000,
             onRetry: (_comment, error, attempt) => {
@@ -2032,11 +2047,17 @@ export async function mirrorGitRepoPullRequestsToGitea({
 
   const { processWithRetry } = await import("@/lib/utils/concurrency");
 
-  const rawPullConcurrency = config.giteaConfig?.pullRequestConcurrency ?? 5;
+  const rawPullConcurrency = config.giteaConfig?.pullRequestConcurrency ?? 1;
   const pullRequestConcurrencyLimit =
     Number.isFinite(rawPullConcurrency)
       ? Math.max(1, Math.floor(rawPullConcurrency))
-      : 5;
+      : 1;
+
+  if (pullRequestConcurrencyLimit > 1) {
+    console.warn(
+      `[Pull Requests] Concurrency is set to ${pullRequestConcurrencyLimit}. This may lead to out-of-order pull request mirroring in Gitea.`
+    );
+  }
 
   let successCount = 0;
   let failedCount = 0;

src/lib/utils/config-defaults.ts

@@ -86,8 +86,8 @@ export async function createDefaultConfig({ userId, envOverrides = {} }: Default
       addTopics: true,
       preserveVisibility: false,
       forkStrategy: "reference",
-      issueConcurrency: 3,
+      issueConcurrency: 1,
-      pullRequestConcurrency: 5,
+      pullRequestConcurrency: 1,
     },
     include: [],
     exclude: [],

src/lib/utils/config-mapper.ts

@@ -89,8 +89,8 @@ export function mapUiToDbConfig(
     forkStrategy: advancedOptions.skipForks ? "skip" : "reference",
     
     // Mirror options from UI
-    issueConcurrency: giteaConfig.issueConcurrency ?? 3,
+    issueConcurrency: giteaConfig.issueConcurrency ?? 1,
-    pullRequestConcurrency: giteaConfig.pullRequestConcurrency ?? 5,
+    pullRequestConcurrency: giteaConfig.pullRequestConcurrency ?? 1,
     mirrorReleases: mirrorOptions.mirrorReleases,
     releaseLimit: mirrorOptions.releaseLimit || 10,
     mirrorMetadata: mirrorOptions.mirrorMetadata,
@@ -134,8 +134,8 @@ export function mapDbToUiConfig(dbConfig: any): {
     preserveOrgStructure: dbConfig.giteaConfig?.preserveVisibility || false, // Map preserveVisibility
     mirrorStrategy: dbConfig.githubConfig?.mirrorStrategy || "preserve", // Get from GitHub config
     personalReposOrg: undefined, // Not stored in current schema
-    issueConcurrency: dbConfig.giteaConfig?.issueConcurrency ?? 3,
+    issueConcurrency: dbConfig.giteaConfig?.issueConcurrency ?? 1,
-    pullRequestConcurrency: dbConfig.giteaConfig?.pullRequestConcurrency ?? 5,
+    pullRequestConcurrency: dbConfig.giteaConfig?.pullRequestConcurrency ?? 1,
   };
 
   // Map mirror options from various database fields