diff --git a/server/src/__tests__/workspace-authorization-query.test.ts b/server/src/__tests__/workspace-authorization-query.test.ts
index 78824b8d844..84608592c53 100644
--- a/server/src/__tests__/workspace-authorization-query.test.ts
+++ b/server/src/__tests__/workspace-authorization-query.test.ts
@@ -6,7 +6,7 @@ import { afterAll, beforeAll, describe, expect, it, vi } from "vitest";
 import { and, eq, inArray, sql } from "drizzle-orm";
 import { drizzle } from "drizzle-orm/postgres-js";
 import { agents, authUsers, companies, companyMemberships, createDb, executionWorkspaces, executionWorkspaceRepositoryAccess, heartbeatRuns, issueAccessGrants,
-  issues, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS } from "@paperclipai/db";
+  issues, projects, projectAccessMembers, EMBEDDED_POSTGRES_TEST_TIMEOUT_MS } from "@paperclipai/db";
 import { authorizationService, executionWorkspaceReadSqlCondition, type AuthorizationActor } from "../services/authorization.js";
 import { executionWorkspaceRepositoryService, assertExecutionWorkspaceRootReadAccess } from "../services/execution-workspace-repositories.js";
 import { assertTaskWorkspaceAccess } from "../services/task-workspace-source-access.js";
@@ -200,6 +200,42 @@ const support = await getEmbeddedPostgresTestSupport();
     } finally { vi.stubEnv("PAPERCLIP_ISSUE_PRIVACY_MODE", "enforce"); }
   });
 
+  it("matches private project decisions as each principal gains and loses access", async () => {
+    const [project] = await db.insert(projects).values({ companyId, name: "Private batch source", visibility: "private" }).returning();
+    const resource = { type: "project" as const, companyId, projectId: project.id };
+    const service = authorizationService(db);
+    const candidates: AuthorizationActor[] = [actor, { ...actor, onBehalfOfUserId: undefined }, { type: "board", source: "session", userId }];
+    async function check(expected: boolean[]) {
+      const batched = await service.decideReadsForActors(candidates, [resource]);
+      for (let i = 0; i < candidates.length; i++) {
+        expect(batched[i][0]).toEqual(await service.decide({ actor: { ...candidates[i] }, action: "project:read", resource }));
+        expect(batched[i][0].allowed).toBe(expected[i]);
+      }
+    }
+    try {
+      await check([false, false, false]);
+      await db.insert(projectAccessMembers).values({ companyId, projectId: project.id, subjectType: "agent", subjectId: agentId });
+      await check([false, true, false]);
+      const [grant] = await db.insert(projectAccessMembers).values({ companyId, projectId: project.id, subjectType: "user", subjectId: userId }).returning();
+      await check([true, true, true]);
+      await db.delete(projectAccessMembers).where(eq(projectAccessMembers.id, grant.id));
+      await check([false, true, false]);
+    } finally { await db.delete(projects).where(eq(projects.id, project.id)); }
+  });
+
+  it("supports more than 100 distinct reader principals for issue and project batches", async () => {
+    const [project] = await db.insert(projects).values({ companyId, name: "Many readers" }).returning();
+    const candidates: AuthorizationActor[] = Array.from({ length: 101 }, () => ({ type: "board", source: "session", userId: randomUUID() }));
+    const service = authorizationService(db);
+    try {
+      for (const resource of [{ type: "issue" as const, companyId, issueId: sourceId }, { type: "project" as const, companyId, projectId: project.id }]) {
+        const decisions = await service.decideReadsForActors(candidates, [resource]);
+        expect(decisions).toHaveLength(101);
+        expect(decisions.every(batch => batch.length === 1 && !batch[0].allowed)).toBe(true);
+      }
+    } finally { await db.delete(projects).where(eq(projects.id, project.id)); }
+  });
+
   it("reloads run trust and responsible-user membership between read batches", async () => {
     const service = authorizationService(db);
     const resources = [{ type: "company" as const, companyId }];
diff --git a/server/src/services/authorization.ts b/server/src/services/authorization.ts
index b1aaca16107..fcce7c97308 100644
--- a/server/src/services/authorization.ts
+++ b/server/src/services/authorization.ts
@@ -775,7 +775,7 @@ function createAuthorizationService(db: Db | DbTransaction, readSnapshot?: ReadA
         status: issues.status, executionPolicy: issues.executionPolicy, originKind: issues.originKind, originId: issues.originId,
         visibility: issues.visibility, privacyRootIssueId: issues.privacyRootIssueId,
         responsibleUserId: issues.responsibleUserId, createdByUserId: issues.createdByUserId,
-        readable: sql<boolean[]>`jsonb_build_array(${sql.join(privacyActors.map(actor => issuePrivacyCondition(actor)), sql`, `)})`,
+        readable: sql<boolean[]>`ARRAY[${sql.join(privacyActors.map(actor => issuePrivacyCondition(actor)), sql`, `)}]`,
       }).from(issues).where(inArray(issues.id, issueIds.slice(offset, offset + 500)));
       for (const row of rows) {
         for (let index = 0; index < snapshots.length; index++) snapshots[index].issues.set(row.id, { ...row, readable: row.readable[privacyIndexes[index]] });
@@ -786,7 +786,7 @@ function createAuthorizationService(db: Db | DbTransaction, readSnapshot?: ReadA
     for (let offset = 0; offset < ids.length; offset += 500) {
       const rows = await db.select({ id: projects.id, companyId: projects.companyId,
         executionWorkspacePolicy: projects.executionWorkspacePolicy, visibility: projects.visibility,
-        readable: sql<boolean[]>`jsonb_build_array(${sql.join(privacyActors.map(actor => projectPrivacyCondition(actor)), sql`, `)})`,
+        readable: sql<boolean[]>`ARRAY[${sql.join(privacyActors.map(actor => projectPrivacyCondition(actor)), sql`, `)}]`,
       }).from(projects).where(inArray(projects.id, ids.slice(offset, offset + 500)));
       for (const row of rows) for (let index = 0; index < snapshots.length; index++) {
         snapshots[index].projects.set(row.id, { ...row, readable: row.readable[privacyIndexes[index]] });