perf(convex): bound unbounded owner-wide collects on hot paths

packages/backend/convex/agentJobs.ts

@@ -234,6 +234,11 @@ const normalizeWorkspacePaths = (values: string[] | undefined, max: number) =>
     .filter((value, index, all) => all.indexOf(value) === index)
     .slice(0, max);
 
+// Owner-wide scans for old-workspace cleanup are bounded to this many rows so
+// the query cost cannot grow without limit. The count is therefore reported as
+// "up to N"; delete is per-call bounded and re-runnable to drain the rest.
+const OLD_WORKSPACE_SCAN_LIMIT = 500;
+
 const isDeletableWorkspace = (job: Doc<'agentJobs'>) =>
   ['failed', 'cancelled', 'timed_out'].includes(job.status) ||
   ['stopped', 'expired', 'failed'].includes(job.workspaceStatus ?? '');
@@ -1069,7 +1074,7 @@ export const countOldWorkspaces = query({
     const jobs = await ctx.db
       .query('agentJobs')
       .withIndex('by_owner', (q) => q.eq('ownerId', ownerId))
-      .collect();
+      .take(OLD_WORKSPACE_SCAN_LIMIT);
     return jobs.filter(
       (job) => isDeletableWorkspace(job) && job.updatedAt <= cutoff,
     ).length;
@@ -1091,7 +1096,7 @@ export const deleteOldWorkspaces = mutation({
     const jobs = await ctx.db
       .query('agentJobs')
       .withIndex('by_owner', (q) => q.eq('ownerId', ownerId))
-      .collect();
+      .take(OLD_WORKSPACE_SCAN_LIMIT);
     const deletable = jobs
       .filter((job) => isDeletableWorkspace(job) && job.updatedAt <= cutoff)
       .sort((a, b) => a.updatedAt - b.updatedAt)

packages/backend/convex/spoonCommits.ts

@@ -23,14 +23,26 @@ export const listForSpoon = query({
         .order('desc')
         .take(limit ?? 100);
     }
-    const commits = await ctx.db
-      .query('spoonCommits')
-      .withIndex('by_owner', (q) => q.eq('ownerId', ownerId))
-      .order('desc')
-      .collect();
-    return commits
-      .filter((commit) => commit.spoonId === spoonId)
-      .slice(0, limit ?? 100);
+    const take = limit ?? 100;
+    const [upstream, fork] = await Promise.all([
+      ctx.db
+        .query('spoonCommits')
+        .withIndex('by_spoon_side', (q) =>
+          q.eq('spoonId', spoonId).eq('side', 'upstream'),
+        )
+        .order('desc')
+        .take(take),
+      ctx.db
+        .query('spoonCommits')
+        .withIndex('by_spoon_side', (q) =>
+          q.eq('spoonId', spoonId).eq('side', 'fork'),
+        )
+        .order('desc')
+        .take(take),
+    ]);
+    return [...upstream, ...fork]
+      .sort((a, b) => (b.committedAt ?? 0) - (a.committedAt ?? 0))
+      .slice(0, take);
   },
 });