fix(data): serialize new-link publication races

docs/superpowers/plans/2026-05-30-completed-game-portfolio.md

@@ -78,7 +78,8 @@
 - `da0a306` `fix(data): enforce completed portfolio sessions`
 - `a28b75d` `fix(data): align portfolio mutation lock order`
 - `d762ecc` `fix(data): serialize portfolio future reschedules`
-- Current fix cycle: `fix(data): lock racing portfolio publications`
+- `1d62f69` `fix(data): lock racing portfolio publications`
+- Current fix cycle: `fix(data): serialize new-link publication races`
 
 **Files:**
 - Create: `tests/GmRelay.Bot.Tests/Web/PortfolioMigrationTests.cs`
@@ -267,6 +268,9 @@ public async Task PublishingDraftCardWithAnyFutureLinkedSession_ShouldFailCommit
 [Fact]
 public async Task ConcurrentPublishAndFutureReschedule_ShouldNotDeadlockOrCommitInvalidPublicCard()
 
+[Fact]
+public async Task ConcurrentNewLinkPublishAndFutureReschedule_ShouldNotCommitInvalidPublicCard()
+
 [Theory]
 [InlineData("portfolio_game_sessions")]
 [InlineData("portfolio_game_masters")]
@@ -281,7 +285,7 @@ public async Task RequiredParentCascadeDelete_ShouldFailCommitForPublishedCard(s
 public async Task ParentCardAndGroupCascadeDeletes_ShouldCommit()
 ```
 
-The direct-delete, moved-link, invalid publication, and direct parent-cascade scenarios must expect PostgreSQL `23514` at commit. Every selected linked session must be completed with `scheduled_at < now()`: one future link among multiple selected sessions rejects publication. A final future reschedule must atomically unpublish linked public cards while preserving their first `published_at`; `past -> future -> past` in one transaction must leave the card public. Opposing-order batch reschedules must use an advisory test gate plus `pg_blocking_pids` observation with bounded timeouts, complete without card deadlock, and leave both cards private; do not rely on `pg_sleep` timing. The `READ COMMITTED` concurrency scenarios must launch bounded tasks together, cover both publish/delete lock orders, and prove there is no deadlock, write-skew, or invalid public commit. A session-delete versus future-reschedule race must use the common `sessions` then `portfolio_games` lock order, cover both first-session-lock orders through real blocking transactions, and finish with the card private and session deleted. The publish/reschedule race must finish with the future session committed and the card private. The `REPEATABLE READ` scenarios must reject triggered portfolio writes with `0A000`, including both draft-link deletion versus publication commit orders, because a stale snapshot after lock acquisition cannot safely validate the invariant. The parent-card and owning-group cascade scenarios must commit successfully.
+The direct-delete, moved-link, invalid publication, and direct parent-cascade scenarios must expect PostgreSQL `23514` at commit. Every selected linked session must be completed with `scheduled_at < now()`: one future link among multiple selected sessions rejects publication. A final future reschedule must atomically unpublish linked public cards while preserving their first `published_at`; `past -> future -> past` in one transaction must leave the card public. Opposing-order batch reschedules must use an advisory test gate plus `pg_blocking_pids` observation with bounded timeouts, complete without card deadlock, and leave both cards private; do not rely on `pg_sleep` timing. The `READ COMMITTED` concurrency scenarios must launch bounded tasks together, cover both publish/delete lock orders, and prove there is no deadlock, write-skew, or invalid public commit. A session-delete versus future-reschedule race must use the common `sessions` then `portfolio_games` lock order, cover both first-session-lock orders through real blocking transactions, and finish with the card private and session deleted. The publish/reschedule races must finish with the future session committed and the card private, including a new-link draft publication forced behind the post-row-lock advisory gate. The `REPEATABLE READ` scenarios must reject triggered portfolio writes with `0A000`, including both draft-link deletion versus publication commit orders, because a stale snapshot after lock acquisition cannot safely validate the invariant. The parent-card and owning-group cascade scenarios must commit successfully.
 
 - [ ] **Step 3: Run the Task 1 tests to verify RED**
 
@@ -435,6 +439,8 @@ BEGIN
         ORDER BY pg.id
         FOR UPDATE OF pg;
 
+        PERFORM pg_advisory_xact_lock(20260530, 108);
+
         UPDATE portfolio_games pg
         SET is_public = false,
             updated_at = now()
@@ -508,7 +514,7 @@ CREATE INDEX ix_portfolio_game_reviews_pending
     WHERE moderation_status = 'Pending';
 ```
 
-The deferred constraint triggers retain the link-table `ON DELETE CASCADE` behavior. At transaction commit validators acquire the same transaction-level advisory lock and reject a surviving published card when either required link set is empty or any linked session has `scheduled_at >= now()`. The intentionally global lock is appropriate for low-volume portfolio publication writes: under the application default `READ COMMITTED` isolation level it serializes validation, prevents write-skew across distinct child links, and gives multi-card transactions one lock order. PostgreSQL retains stale snapshots under `REPEATABLE READ` and `SERIALIZABLE`, so the guard rejects every triggered portfolio write at those isolation levels with `0A000`. The deferred future-reschedule trigger re-reads the final session row, skips intermediate future values that end in the past, and for a final future value locks all cards linked to any final-future session in `portfolio_games.id` order before one guarded public-card unpublish update. The lock phase deliberately includes committed drafts so a concurrent draft-to-public publication cannot pass validation against the pre-reschedule session snapshot and commit afterward. This separate global row-lock pass avoids opposing batch order without adding the validator advisory lock before card locks. At `READ COMMITTED`, draft edits, explicit unpublishing, future reschedules, and card or club cascade deletion remain valid. Normal session-deletion handlers use the same `sessions` then `portfolio_games` lock order: explicitly lock the target session row, unpublish linked cards, then delete the session.
+The deferred constraint triggers retain the link-table `ON DELETE CASCADE` behavior. At transaction commit validators acquire the same transaction-level advisory lock and reject a surviving published card when either required link set is empty or any linked session has `scheduled_at >= now()`. The intentionally global lock is appropriate for low-volume portfolio publication writes: under the application default `READ COMMITTED` isolation level it serializes validation, prevents write-skew across distinct child links, and gives multi-card transactions one lock order. PostgreSQL retains stale snapshots under `REPEATABLE READ` and `SERIALIZABLE`, so the guard rejects every triggered portfolio write at those isolation levels with `0A000`. The deferred future-reschedule trigger re-reads the final session row, skips intermediate future values that end in the past, and for a final future value locks all cards linked to any final-future session in `portfolio_games.id` order. It then acquires the publication advisory lock and runs one guarded public-card unpublish update with a fresh `READ COMMITTED` statement snapshot. The row-lock phase deliberately includes committed drafts so a concurrent draft-to-public publication cannot pass validation against the pre-reschedule session snapshot and commit afterward; the post-row-lock advisory phase also serializes a previously invisible concurrent link-add publication without moving the advisory lock above card locks. At `READ COMMITTED`, draft edits, explicit unpublishing, future reschedules, and card or club cascade deletion remain valid. Normal session-deletion handlers use the same `sessions` then `portfolio_games` lock order: explicitly lock the target session row, unpublish linked cards, then delete the session.
 
 - [ ] **Step 5: Lock sessions before explicitly unpublishing linked cards in both session-deletion handlers**
 
@@ -554,7 +560,7 @@ Run:
 dotnet test tests/GmRelay.Bot.Tests/GmRelay.Bot.Tests.csproj --filter "FullyQualifiedName~PortfolioMigrationTests|FullyQualifiedName~PortfolioMigrationPostgresTests|FullyQualifiedName~PortfolioSessionDeletionSourceTests|FullyQualifiedName~PortfolioSchemaGateSourceTests"
 ```
 
-Expected: PASS, including PostgreSQL 17 migration application, rejected direct required-link deletes, rejected moved links and session/player cascades, rejected publication with any future linked session, automatic unpublish with preserved `published_at` after final future reschedule, preserved public state after `past -> future -> past`, opposing-order batch reschedules without card deadlock, bounded `READ COMMITTED` publish/delete in both commit orders, publish/reschedule races, session-delete/reschedule serialization in both first-lock orders, and distinct-link deletion without deadlock, write-skew, or invalid public commit, rejected `REPEATABLE READ` triggered writes including both draft-delete versus publish commit orders, successful parent-card and owning-group cascades, Discord identity scoping, and Compose/Aspire HTTP health gating with a non-proxied bot endpoint and matching `gmrelaydb` resource name.
+Expected: PASS, including PostgreSQL 17 migration application, rejected direct required-link deletes, rejected moved links and session/player cascades, rejected publication with any future linked session, automatic unpublish with preserved `published_at` after final future reschedule, preserved public state after `past -> future -> past`, opposing-order batch reschedules without card deadlock, bounded `READ COMMITTED` publish/delete in both commit orders, existing-link and new-link publish/reschedule races, session-delete/reschedule serialization in both first-lock orders, and distinct-link deletion without deadlock, write-skew, or invalid public commit, rejected `REPEATABLE READ` triggered writes including both draft-delete versus publish commit orders, successful parent-card and owning-group cascades, Discord identity scoping, and Compose/Aspire HTTP health gating with a non-proxied bot endpoint and matching `gmrelaydb` resource name.
 
 - [ ] **Step 7: Commit**
 

docs/superpowers/specs/2026-05-30-completed-game-portfolio-design.md

@@ -81,7 +81,7 @@ Application validation additionally requires at least one linked session, every
 
 Deferred database constraint triggers validate the same invariant at transaction commit after a card transitions to public, a session link is inserted, deleted, moved, or repointed, or a required master link is deleted or moved. They raise a check-violation error if a published card would commit without both required link sets or with any linked session where `scheduled_at >= now()`. Before checking state, each validator acquires the same transaction-level PostgreSQL advisory lock, `pg_advisory_xact_lock(20260530, 108)`. Portfolio publication writes are low volume, so this intentionally global lock serializes invariant validation with one lock order, prevents write-skew under the application default `READ COMMITTED` isolation level, and avoids multi-card deadlocks. PostgreSQL keeps a stale snapshot after waiting under `REPEATABLE READ` or `SERIALIZABLE`, so the guard rejects every triggered portfolio write at those levels; callers must use `READ COMMITTED` for portfolio mutations.
 
-A deferred `sessions.scheduled_at` trigger atomically unpublishes linked public cards when a completed session is finally rescheduled into the future, preserving the first `published_at`. Because deferred row triggers retain their event-time `NEW`, the trigger re-reads the final `sessions.scheduled_at` before acting. For a final future value it takes row locks for all cards linked to any final-future session in `portfolio_games.id` order, including committed drafts, then unpublishes the matching public cards in one guarded update. Including drafts prevents a concurrent draft-to-public publication from validating against the pre-reschedule session snapshot and committing afterward. The low-volume global pass gives batch reschedules one card-lock order without taking the publication validator advisory lock before card locks. Session mutation paths use `sessions` before linked `portfolio_games`; normal session-deletion handlers explicitly lock the target session row, unpublish linked cards in the same transaction, and only then delete the session. The link foreign keys retain `ON DELETE CASCADE`; when the card itself or its owning club is deleted at `READ COMMITTED`, deferred validation sees no surviving published card and remains harmless.
+A deferred `sessions.scheduled_at` trigger atomically unpublishes linked public cards when a completed session is finally rescheduled into the future, preserving the first `published_at`. Because deferred row triggers retain their event-time `NEW`, the trigger re-reads the final `sessions.scheduled_at` before acting. For a final future value it takes row locks for all cards linked to any final-future session in `portfolio_games.id` order, including committed drafts. It then acquires the publication advisory lock and unpublishes matching public cards in a guarded update with a fresh `READ COMMITTED` statement snapshot. Including drafts prevents a concurrent draft-to-public publication from validating against the pre-reschedule session snapshot and committing afterward. Taking the shared advisory lock after card rows, but before the guarded update, also serializes a previously invisible concurrent link-add publication without reintroducing the card/advisory lock inversion. Session mutation paths use `sessions` before linked `portfolio_games`; normal session-deletion handlers explicitly lock the target session row, unpublish linked cards in the same transaction, and only then delete the session. The link foreign keys retain `ON DELETE CASCADE`; when the card itself or its owning club is deleted at `READ COMMITTED`, deferred validation sees no surviving published card and remains harmless.
 
 ### `portfolio_game_sessions`
 
@@ -356,7 +356,7 @@ Follow TDD for production changes.
 ### Schema And Contracts
 
 - Migration source-contract tests assert the four new tables, format constraint, publication guard, case-insensitive slug uniqueness, group and GM-profile indexes, card-oriented pending-review index, completed-session validator, deferred future-reschedule unpublish trigger, session-first deletion locks, and the AppHost HTTP health gate.
-- PostgreSQL integration tests apply migrations V001 through V029 to `postgres:17-alpine` and cover direct invalid link removal, moved links, direct session/player cascades, explicit session-lock then unpublish then session deletion, delete/reschedule lock ordering in both first-lock orders, rejection of publication when any linked session is future, automatic unpublish with preserved `published_at` after future reschedule, `past -> future -> past` final-state handling, opposing-order batch future reschedules without card deadlock using an observed advisory test gate instead of timing sleeps, publish/reschedule races, both bounded publish/delete commit orders, concurrent removal of distinct required links without write-skew or deadlock under `READ COMMITTED`, rejection of equivalent `REPEATABLE READ` writes including both draft-delete versus publish commit orders, and parent/card cascade deletion.
+- PostgreSQL integration tests apply migrations V001 through V029 to `postgres:17-alpine` and cover direct invalid link removal, moved links, direct session/player cascades, explicit session-lock then unpublish then session deletion, delete/reschedule lock ordering in both first-lock orders, rejection of publication when any linked session is future, automatic unpublish with preserved `published_at` after future reschedule, `past -> future -> past` final-state handling, opposing-order batch future reschedules without card deadlock using an observed advisory test gate instead of timing sleeps, existing-link and new-link draft publication/reschedule races, both bounded publish/delete commit orders, concurrent removal of distinct required links without write-skew or deadlock under `READ COMMITTED`, rejection of equivalent `REPEATABLE READ` writes including both draft-delete versus publish commit orders, and parent/card cascade deletion.
 - Public DTO reflection/source tests assert that private identifiers and physical storage paths are absent.
 - Existing showcase tests continue to assert the future-session catalog boundary.
 

src/GmRelay.Bot/Migrations/V029__add_completed_game_portfolios_and_reviews.sql

@@ -140,6 +140,8 @@ BEGIN
         ORDER BY pg.id
         FOR UPDATE OF pg;
 
+        PERFORM pg_advisory_xact_lock(20260530, 108);
+
         UPDATE portfolio_games pg
         SET is_public = false,
             updated_at = now()

tests/GmRelay.Bot.Tests/Web/PortfolioMigrationPostgresTests.cs

@@ -542,6 +542,95 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             parameters: new NpgsqlParameter("sessionId", seed.SessionIds[0])));
     }
 
+    [Fact]
+    public async Task ConcurrentNewLinkPublishAndFutureReschedule_ShouldNotCommitInvalidPublicCard()
+    {
+        var database = await fixture.CreateMigratedDatabaseAsync();
+        await using var seedConnection = await database.OpenConnectionAsync();
+        var seed = await SeedCardAsync(seedConnection, isPublic: false);
+        var rescheduledSessionId = Guid.NewGuid();
+        await ExecuteNonQueryAsync(
+            seedConnection,
+            """
+            INSERT INTO sessions (id, group_id, title, join_link, scheduled_at)
+            VALUES (@sessionId, @groupId, 'Completed Session', 'https://example.test/session', now() - interval '1 day');
+            """,
+            parameters:
+            [
+                new NpgsqlParameter("sessionId", rescheduledSessionId),
+                new NpgsqlParameter("groupId", seed.GroupId)
+            ]);
+
+        await using var rescheduleConnection = await database.OpenConnectionAsync();
+        await using var publishConnection = await database.OpenConnectionAsync();
+        await using var gateConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
+        await using var rescheduleTransaction = await rescheduleConnection.BeginTransactionAsync();
+        await using var publishTransaction = await publishConnection.BeginTransactionAsync();
+        await using var gateTransaction = await gateConnection.BeginTransactionAsync();
+        var reschedulePid = await GetBackendPidAsync(rescheduleConnection, rescheduleTransaction);
+        var publishPid = await GetBackendPidAsync(publishConnection, publishTransaction);
+        var gatePid = await GetBackendPidAsync(gateConnection, gateTransaction);
+        await AcquirePortfolioValidationLockAsync(gateConnection, gateTransaction);
+
+        Assert.Equal(1, await RescheduleSessionAsync(
+            rescheduleConnection,
+            rescheduleTransaction,
+            rescheduledSessionId));
+        var forceRescheduleTriggerTask = ExecuteNonQueryAsync(
+            rescheduleConnection,
+            "SET CONSTRAINTS trg_sessions_unpublish_public_portfolio_games_for_future_reschedule IMMEDIATE",
+            rescheduleTransaction);
+        await WaitUntilBlockedByAsync(observerConnection, reschedulePid, gatePid);
+
+        await ExecuteNonQueryAsync(
+            publishConnection,
+            """
+            INSERT INTO portfolio_game_sessions (portfolio_game_id, session_id)
+            VALUES (@portfolioGameId, @sessionId);
+
+            UPDATE portfolio_games
+            SET is_public = true,
+                published_at = COALESCE(published_at, now()),
+                updated_at = now()
+            WHERE id = @portfolioGameId;
+            """,
+            publishTransaction,
+            new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
+            new NpgsqlParameter("sessionId", rescheduledSessionId));
+        var publishCommitTask = CommitAndCaptureSqlStateAsync(publishTransaction);
+        await WaitUntilBlockedByAsync(observerConnection, publishPid, gatePid);
+
+        await gateTransaction.CommitAsync().WaitAsync(CommandTimeout);
+        await forceRescheduleTriggerTask.WaitAsync(CommandTimeout);
+        await rescheduleTransaction.CommitAsync().WaitAsync(CommandTimeout);
+
+        Assert.Equal(PostgresErrorCodes.CheckViolation, await publishCommitTask.WaitAsync(CommandTimeout));
+
+        await using var verificationConnection = await database.OpenConnectionAsync();
+        Assert.False(await ExecuteScalarAsync<bool>(
+            verificationConnection,
+            "SELECT is_public FROM portfolio_games WHERE id = @portfolioGameId",
+            parameters: new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId)));
+        Assert.True(await ExecuteScalarAsync<bool>(
+            verificationConnection,
+            "SELECT scheduled_at >= now() FROM sessions WHERE id = @sessionId",
+            parameters: new NpgsqlParameter("sessionId", rescheduledSessionId)));
+        Assert.Equal(0, await ExecuteScalarAsync<long>(
+            verificationConnection,
+            """
+            SELECT COUNT(*)
+            FROM portfolio_game_sessions
+            WHERE portfolio_game_id = @portfolioGameId
+              AND session_id = @sessionId
+            """,
+            parameters:
+            [
+                new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
+                new NpgsqlParameter("sessionId", rescheduledSessionId)
+            ]));
+    }
+
     [Theory]
     [InlineData(true)]
     [InlineData(false)]

tests/GmRelay.Bot.Tests/Web/PortfolioMigrationTests.cs

@@ -50,13 +50,11 @@ public sealed class PortfolioMigrationTests
         Assert.Contains("IF final_scheduled_at >= now() THEN", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("PERFORM pg.id FROM portfolio_games pg WHERE EXISTS", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("ORDER BY pg.id FOR UPDATE OF pg;", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("ORDER BY pg.id FOR UPDATE OF pg; PERFORM pg_advisory_xact_lock(20260530, 108); UPDATE portfolio_games pg SET is_public = false", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("UPDATE portfolio_games pg SET is_public = false, updated_at = now() WHERE pg.is_public = true AND EXISTS (SELECT 1 FROM portfolio_game_sessions pgs JOIN sessions s ON s.id = pgs.session_id WHERE pgs.portfolio_game_id = pg.id AND s.scheduled_at >= now());", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("CREATE CONSTRAINT TRIGGER trg_sessions_unpublish_public_portfolio_games_for_future_reschedule AFTER UPDATE OF scheduled_at ON sessions DEFERRABLE INITIALLY DEFERRED FOR EACH ROW EXECUTE FUNCTION unpublish_public_portfolio_games_for_future_session();", normalizedMigration, StringComparison.Ordinal);
         Assert.DoesNotContain("unpublish_portfolio_game_without_required_links", normalizedMigration, StringComparison.Ordinal);
-        Assert.DoesNotContain(
+        Assert.Contains("pg_advisory_xact_lock", normalizedMigration[unpublishFunctionStart..unpublishFunctionEnd], StringComparison.Ordinal);
-            "pg_advisory_xact_lock",
-            normalizedMigration[unpublishFunctionStart..unpublishFunctionEnd],
-            StringComparison.Ordinal);
         Assert.DoesNotContain("published_at = NULL", normalizedMigration, StringComparison.OrdinalIgnoreCase);
         Assert.Contains("publication_consent_at TIMESTAMPTZ NOT NULL,", normalizedMigration, StringComparison.Ordinal);
     }