fix(data): serialize portfolio mutations before rows

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

@@ -124,6 +124,13 @@ public async Task MigrationV029_ShouldCreatePortfolioTablesAndPublicationGuards(
     Assert.Contains("CREATE INDEX ix_portfolio_games_group ON portfolio_games (group_id, completed_at DESC);", normalizedMigration, StringComparison.Ordinal);
     Assert.Contains("CREATE INDEX ix_portfolio_game_masters_player ON portfolio_game_masters (player_id, portfolio_game_id);", normalizedMigration, StringComparison.Ordinal);
     Assert.Contains("CREATE INDEX ix_portfolio_game_reviews_pending ON portfolio_game_reviews (portfolio_game_id, created_at DESC) WHERE moderation_status = 'Pending';", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE FUNCTION lock_portfolio_publication_mutation() RETURNS TRIGGER LANGUAGE plpgsql", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_portfolio_games_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE OF is_public ON portfolio_games FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_portfolio_game_sessions_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_sessions FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_portfolio_game_masters_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_masters FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_sessions_lock_portfolio_publication_mutation BEFORE DELETE OR UPDATE OF scheduled_at ON sessions FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_game_groups_lock_portfolio_publication_mutation_before_delete BEFORE DELETE ON game_groups FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
+    Assert.Contains("CREATE TRIGGER trg_players_lock_portfolio_publication_mutation_before_delete BEFORE DELETE ON players FOR EACH STATEMENT", normalizedMigration, StringComparison.Ordinal);
     Assert.Contains("CREATE FUNCTION validate_public_portfolio_game_required_links() RETURNS TRIGGER LANGUAGE plpgsql", normalizedMigration, StringComparison.Ordinal);
     Assert.Contains("PERFORM pg_advisory_xact_lock(20260530, 108);", normalizedMigration, StringComparison.Ordinal);
     Assert.Contains("current_setting('transaction_isolation') <> 'read committed'", normalizedMigration, StringComparison.Ordinal);
@@ -155,7 +162,7 @@ public async Task MigrationV029_ShouldStoreProviderNeutralCoverKeys()
 }
 ```
 
-Add `PortfolioSessionDeletionSourceTests.cs`. Normalize whitespace before comparing source text and assert that both session-deletion paths explicitly lock the target session row, unpublish linked cards, and then delete the required session link:
+Add `PortfolioSessionDeletionSourceTests.cs`. Normalize whitespace before comparing source text and assert that both session-deletion paths acquire the portfolio mutation lock, explicitly lock the target session row, unpublish linked cards, and then delete the required session link:
 
 ```csharp
 [Fact]
@@ -166,11 +173,17 @@ public async Task SharedDeleteSessionHandler_ShouldLockSessionBeforeUnpublishing
 
     const string sessionLock =
         "FROM sessions s WHERE s.id = @SessionId FOR UPDATE OF s";
+    const string mutationLock =
+        "SELECT pg_advisory_xact_lock(20260530, 108)";
     const string unpublish =
         "UPDATE portfolio_games pg SET is_public = false, updated_at = now() FROM portfolio_game_sessions pgs WHERE pgs.portfolio_game_id = pg.id AND pgs.session_id = @SessionId AND pg.is_public = true";
 
+    Assert.Contains(mutationLock, source, StringComparison.Ordinal);
     Assert.Contains(sessionLock, source, StringComparison.Ordinal);
     Assert.Contains(unpublish, source, StringComparison.Ordinal);
+    Assert.True(
+        source.IndexOf(mutationLock, StringComparison.Ordinal) <
+        source.IndexOf(sessionLock, StringComparison.Ordinal));
     Assert.True(
         source.IndexOf(sessionLock, StringComparison.Ordinal) <
         source.IndexOf(unpublish, StringComparison.Ordinal));
@@ -237,7 +250,7 @@ public async Task ExplicitUnpublishThenSessionDelete_ShouldCommitAndPreserveFirs
 [Theory]
 [InlineData(true)]
 [InlineData(false)]
-public async Task ConcurrentPublishAndLinkDelete_ShouldNotDeadlockOrCommitInvalidPublicCard(bool publishCommitsFirst)
+public async Task ConcurrentPublishAndLinkDelete_ShouldSerializeBeforeRowsAndRejectInvalidPublicCard(bool publishMutatesFirst)
 
 [Theory]
 [InlineData("portfolio_game_sessions", "session_id")]
@@ -261,7 +274,7 @@ public async Task PublishedCardFutureReschedule_ShouldAutomaticallyUnpublishAndP
 public async Task PublishedCardPastFuturePastReschedule_ShouldRemainPublicAndPreserveFirstPublishedAt()
 
 [Fact]
-public async Task ConcurrentBatchFutureReschedules_ShouldLockPublicCardsInStableOrderWithoutDeadlock()
+public async Task ConcurrentBatchFutureReschedules_ShouldSerializeBeforeSessionRowsWithoutDeadlock()
 
 [Fact]
 public async Task PublishingDraftCardWithAnyFutureLinkedSession_ShouldFailCommit()
@@ -272,6 +285,17 @@ public async Task ConcurrentPublishAndFutureReschedule_ShouldNotDeadlockOrCommit
 [Fact]
 public async Task ConcurrentNewLinkPublishAndFutureReschedule_ShouldNotCommitInvalidPublicCard()
 
+[Fact]
+public async Task PortfolioSessionLinkInsert_ShouldAcquirePublicationLockBeforeRows()
+
+[Fact]
+public async Task FutureReschedule_ShouldAcquirePublicationLockBeforeSessionRows()
+
+[Theory]
+[InlineData(true)]
+[InlineData(false)]
+public async Task ConcurrentSessionDeleteAndFutureReschedule_ShouldSerializeMutationGateBeforeRowsWithoutDeadlock(bool deleteMutatesFirst)
+
 [Fact]
 public async Task RepeatableReadStaleSnapshotFutureReschedule_ShouldBeRejectedWithoutInvalidPublicCard()
 
@@ -289,7 +313,7 @@ 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 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 and stale-snapshot final-future reschedules after a newly linked publication, 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 prove with `pg_blocking_pids` observation and bounded timeouts that the shared mutation lock serializes statements before session rows, complete without 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 advisory-lock then `sessions` then `portfolio_games` lock order, cover both first-mutation-lock orders through real blocking transactions, and finish with the card private and session deleted. Link insertion and final-future reschedule gate scenarios must prove that invariant-affecting statements acquire the shared mutation lock before rows. The publish/reschedule races 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 and stale-snapshot final-future reschedules after a newly linked publication, 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**
 
@@ -355,6 +379,46 @@ CREATE TABLE portfolio_game_masters (
 CREATE INDEX ix_portfolio_game_masters_player
     ON portfolio_game_masters (player_id, portfolio_game_id);
 
+CREATE FUNCTION lock_portfolio_publication_mutation()
+RETURNS TRIGGER
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    PERFORM pg_advisory_xact_lock(20260530, 108);
+    RETURN NULL;
+END;
+$$;
+
+CREATE TRIGGER trg_portfolio_games_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE OF is_public ON portfolio_games
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_portfolio_game_sessions_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_sessions
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_portfolio_game_masters_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_masters
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_sessions_lock_portfolio_publication_mutation
+BEFORE DELETE OR UPDATE OF scheduled_at ON sessions
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_game_groups_lock_portfolio_publication_mutation_before_delete
+BEFORE DELETE ON game_groups
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_players_lock_portfolio_publication_mutation_before_delete
+BEFORE DELETE ON players
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
 CREATE FUNCTION validate_public_portfolio_game_required_links()
 RETURNS TRIGGER
 LANGUAGE plpgsql
@@ -524,11 +588,11 @@ 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 rejects final-future reschedules outside `READ COMMITTED` with `0A000`. Under `READ COMMITTED`, it 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 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.
+The deferred constraint triggers retain the link-table `ON DELETE CASCADE` behavior. Immediate statement triggers acquire one transaction-level advisory lock before any invariant-affecting rows are changed: publication transitions and deletes, required-link edits, session deletes and scheduled-date changes, and parent deletes that can cascade into required links. The intentionally global lock is appropriate for low-volume portfolio and schedule writes: under the application default `READ COMMITTED` isolation level it establishes one advisory-lock then row-lock protocol, prevents write-skew across distinct child links, and removes card/advisory and session/advisory inversions. At transaction commit validators re-acquire the same lock and reject a surviving published card when either required link set is empty or any linked session has `scheduled_at >= now()`. 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 rejects final-future reschedules outside `READ COMMITTED` with `0A000`. Under `READ COMMITTED`, it locks all cards linked to any final-future session in `portfolio_games.id` order, re-acquires the shared advisory lock, and runs one guarded public-card unpublish update with a fresh 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. At `READ COMMITTED`, draft edits, explicit unpublishing, future reschedules, and card or club cascade deletion remain valid. Normal session-deletion handlers use the same advisory-lock then `sessions` then `portfolio_games` order: explicitly acquire the mutation lock, 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**
 
-In `src/GmRelay.Shared/Features/Sessions/ListSessions/DeleteSessionHandler.cs`, strengthen the initial session fetch with `FOR UPDATE OF s`. After authorization, run this statement inside the existing transaction before `DELETE FROM sessions`:
+In `src/GmRelay.Shared/Features/Sessions/ListSessions/DeleteSessionHandler.cs`, acquire `pg_advisory_xact_lock(20260530, 108)` immediately after starting the transaction, then strengthen the initial session fetch with `FOR UPDATE OF s`. After authorization, run this statement inside the existing transaction before `DELETE FROM sessions`:
 
 ```sql
 UPDATE portfolio_games pg
@@ -540,7 +604,7 @@ WHERE pgs.portfolio_game_id = pg.id
   AND pg.is_public = true
 ```
 
-In `src/GmRelay.DiscordBot/Features/Sessions/DiscordDeleteSessionHandler.cs`, start a transaction before deleting. Lock the guild-scoped target session row with `SELECT s.id ... FOR UPDATE OF s`, preserving the existing not-found result. Run this guild-scoped unpublish statement before the existing guild-scoped `DELETE FROM sessions`, then commit:
+In `src/GmRelay.DiscordBot/Features/Sessions/DiscordDeleteSessionHandler.cs`, start a transaction before deleting and acquire `pg_advisory_xact_lock(20260530, 108)`. Lock the guild-scoped target session row with `SELECT s.id ... FOR UPDATE OF s`, preserving the existing not-found result. Run this guild-scoped unpublish statement before the existing guild-scoped `DELETE FROM sessions`, then commit:
 
 ```sql
 UPDATE portfolio_games pg
@@ -556,7 +620,7 @@ WHERE pgs.portfolio_game_id = pg.id
   AND pg.is_public = true
 ```
 
-Both handlers deliberately use `sessions` then `portfolio_games` locking before session deletion. This matches future rescheduling, keeps normal deletes successful, preserves the first-publication `published_at`, and leaves the deferred trigger as the direct-SQL and concurrency backstop.
+Both handlers deliberately use advisory-lock then `sessions` then `portfolio_games` locking before session deletion. This matches future rescheduling, keeps normal deletes successful, preserves the first-publication `published_at`, and leaves the triggers as the direct-SQL and concurrency backstop.
 
 Also add `AND p.platform = 'Discord'` to the Discord manager lookup before casting manager IDs, so cross-platform identities cannot affect authorization.
 
@@ -570,7 +634,7 @@ 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, 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 and stale-snapshot final-future reschedules, 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`, statement-level mutation locking before session and required-link rows, 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 and stale-snapshot final-future reschedules, 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

@@ -79,9 +79,9 @@ CHECK (NOT is_public OR (
 
 Application validation additionally requires at least one linked session, every linked session to be completed with `scheduled_at < now()`, and at least one linked GM before publishing because those requirements span child tables. Publishing locks the parent card, validates both required link sets, then sets `is_public = true` and `published_at = COALESCE(published_at, now())` so `published_at` remains the first-publication timestamp. Link replacement locks the parent card and unpublishes it before replacing required links.
 
-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.
+Immediate statement triggers acquire one transaction-level PostgreSQL advisory lock, `pg_advisory_xact_lock(20260530, 108)`, before any invariant-affecting rows are changed: publication transitions and deletes, required-link edits, session deletes and scheduled-date changes, and parent deletes that can cascade into required links. 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()`. Portfolio and schedule mutations are low volume, so this intentionally global lock establishes one advisory-lock then row-lock protocol, prevents write-skew under the application default `READ COMMITTED` isolation level, and avoids multi-card, card/advisory, and session/advisory 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. It rejects final-future reschedules outside `READ COMMITTED` with `0A000`, because the unpublish pass requires fresh statement snapshots. Under `READ COMMITTED`, 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 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.
+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. It rejects final-future reschedules outside `READ COMMITTED` with `0A000`, because the unpublish pass requires fresh statement snapshots. Under `READ COMMITTED`, it takes row locks for all cards linked to any final-future session in `portfolio_games.id` order, including committed drafts. It then re-acquires the publication advisory lock and unpublishes matching public cards in a guarded update with a fresh statement snapshot. Including drafts prevents a concurrent draft-to-public publication from validating against the pre-reschedule session snapshot and committing afterward. Session mutation paths use advisory-lock then `sessions` then linked `portfolio_games`; normal session-deletion handlers explicitly acquire the mutation lock, 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`
 
@@ -355,8 +355,8 @@ 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, 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 stale-snapshot final-future reschedules, and parent/card cascade deletion.
+- 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, immediate statement-level mutation locks, completed-session validator, deferred future-reschedule unpublish trigger, advisory-lock then session-row 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 mutation-lock then session-lock then unpublish then session deletion, delete/reschedule mutation-gate 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, required-link insertion and final-future reschedule mutation locks before rows, opposing-order batch future reschedules serialized before session rows, 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 stale-snapshot final-future reschedules, 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

@@ -52,6 +52,46 @@ CREATE TABLE portfolio_game_masters (
 CREATE INDEX ix_portfolio_game_masters_player
     ON portfolio_game_masters (player_id, portfolio_game_id);
 
+CREATE FUNCTION lock_portfolio_publication_mutation()
+RETURNS TRIGGER
+LANGUAGE plpgsql
+AS $$
+BEGIN
+    PERFORM pg_advisory_xact_lock(20260530, 108);
+    RETURN NULL;
+END;
+$$;
+
+CREATE TRIGGER trg_portfolio_games_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE OF is_public ON portfolio_games
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_portfolio_game_sessions_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_sessions
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_portfolio_game_masters_lock_publication_mutation
+BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_masters
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_sessions_lock_portfolio_publication_mutation
+BEFORE DELETE OR UPDATE OF scheduled_at ON sessions
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_game_groups_lock_portfolio_publication_mutation_before_delete
+BEFORE DELETE ON game_groups
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
+CREATE TRIGGER trg_players_lock_portfolio_publication_mutation_before_delete
+BEFORE DELETE ON players
+FOR EACH STATEMENT
+EXECUTE FUNCTION lock_portfolio_publication_mutation();
+
 CREATE FUNCTION validate_public_portfolio_game_required_links()
 RETURNS TRIGGER
 LANGUAGE plpgsql

src/GmRelay.DiscordBot/Features/Sessions/DiscordDeleteSessionHandler.cs

@@ -45,6 +45,9 @@ public sealed class DiscordDeleteSessionHandler(
         }
 
         await using var transaction = await connection.BeginTransactionAsync(cancellationToken);
+        await connection.ExecuteAsync(
+            "SELECT pg_advisory_xact_lock(20260530, 108)",
+            transaction: transaction);
         _ = await connection.QuerySingleOrDefaultAsync<Guid?>(
             """
             SELECT s.id

src/GmRelay.Shared/Features/Sessions/ListSessions/DeleteSessionHandler.cs

@@ -31,7 +31,12 @@ public sealed class DeleteSessionHandler(
         await using var connection = await dataSource.OpenConnectionAsync(ct);
         await using var transaction = await connection.BeginTransactionAsync(ct);
 
-        // 1. Lock the session before any linked portfolio card and verify group manager.
+        // 1. Use the database mutation order before locking the session or linked portfolio cards.
+        await connection.ExecuteAsync(
+            "SELECT pg_advisory_xact_lock(20260530, 108)",
+            transaction: transaction);
+
+        // 2. Lock the session before any linked portfolio card and verify group manager.
         var session = await connection.QuerySingleOrDefaultAsync<DeleteSessionInfoDto>(
             """
             SELECT s.title AS Title,
@@ -63,7 +68,7 @@ public sealed class DeleteSessionHandler(
             return new DeleteSessionResult(false, "Только owner или co-GM может удалять сессию.", null, null, null, false, 0);
         }
 
-        // 2. Unpublish a linked portfolio card before its required session link cascades away.
+        // 3. Unpublish a linked portfolio card before its required session link cascades away.
         await connection.ExecuteAsync(
             """
             UPDATE portfolio_games pg
@@ -77,7 +82,7 @@ public sealed class DeleteSessionHandler(
             new { command.SessionId },
             transaction);
 
-        // 3. Delete session
+        // 4. Delete session
         await connection.ExecuteAsync("DELETE FROM sessions WHERE id = @Id", new { Id = command.SessionId }, transaction);
 
         var remainingInTopic = session.ThreadId.HasValue

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

@@ -96,51 +96,64 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
     [Theory]
     [InlineData(true)]
     [InlineData(false)]
-    public async Task ConcurrentPublishAndLinkDelete_ShouldNotDeadlockOrCommitInvalidPublicCard(bool publishCommitsFirst)
+    public async Task ConcurrentPublishAndLinkDelete_ShouldSerializeBeforeRowsAndRejectInvalidPublicCard(
+        bool publishMutatesFirst)
     {
         var database = await fixture.CreateMigratedDatabaseAsync();
         await using var publishConnection = await database.OpenConnectionAsync();
         await using var deleteConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
         var seed = await SeedCardAsync(publishConnection, isPublic: false);
         await using var publishTransaction = await publishConnection.BeginTransactionAsync();
         await using var deleteTransaction = await deleteConnection.BeginTransactionAsync();
+        var publishPid = await GetBackendPidAsync(publishConnection, publishTransaction);
+        var deletePid = await GetBackendPidAsync(deleteConnection, deleteTransaction);
 
-        await ExecuteNonQueryAsync(
-            publishConnection,
-            """
-            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));
-        await ExecuteNonQueryAsync(deleteConnection, "SET LOCAL lock_timeout = '2s'", deleteTransaction);
+        if (publishMutatesFirst)
+        {
+            Assert.Equal(1, await PublishPortfolioGameAsync(
+                publishConnection,
+                publishTransaction,
+                seed.PortfolioGameId));
+            var deleteTask = DeletePortfolioGameLinksAsync(
+                deleteConnection,
+                deleteTransaction,
+                "portfolio_game_sessions",
+                seed.PortfolioGameId);
 
-        Assert.Equal(1, await ExecuteNonQueryAsync(
-            deleteConnection,
-            "DELETE FROM portfolio_game_sessions WHERE portfolio_game_id = @portfolioGameId",
-            deleteTransaction,
-            new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId)));
+            await WaitUntilBlockedByAsync(observerConnection, deletePid, publishPid);
+            Assert.Null(await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
+            Assert.Equal(1, await deleteTask.WaitAsync(CommandTimeout));
+            Assert.Equal(
+                PostgresErrorCodes.CheckViolation,
+                await CommitAndCaptureSqlStateAsync(deleteTransaction).WaitAsync(CommandTimeout));
+        }
+        else
+        {
+            Assert.Equal(1, await DeletePortfolioGameLinksAsync(
+                deleteConnection,
+                deleteTransaction,
+                "portfolio_game_sessions",
+                seed.PortfolioGameId));
+            var publishTask = PublishPortfolioGameAsync(
+                publishConnection,
+                publishTransaction,
+                seed.PortfolioGameId);
 
-        await AcquirePortfolioValidationLockAsync(
-            publishCommitsFirst ? publishConnection : deleteConnection,
-            publishCommitsFirst ? publishTransaction : deleteTransaction);
-
-        var commitStates = await Task.WhenAll(
-            CommitAndCaptureSqlStateAsync(publishTransaction),
-            CommitAndCaptureSqlStateAsync(deleteTransaction)).WaitAsync(CommandTimeout);
-
-        Assert.Equal(publishCommitsFirst ? null : PostgresErrorCodes.CheckViolation, commitStates[0]);
-        Assert.Equal(publishCommitsFirst ? PostgresErrorCodes.CheckViolation : null, commitStates[1]);
+            await WaitUntilBlockedByAsync(observerConnection, publishPid, deletePid);
+            Assert.Null(await CommitAndCaptureSqlStateAsync(deleteTransaction).WaitAsync(CommandTimeout));
+            Assert.Equal(1, await publishTask.WaitAsync(CommandTimeout));
+            Assert.Equal(
+                PostgresErrorCodes.CheckViolation,
+                await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
+        }
 
         await using var verificationConnection = await database.OpenConnectionAsync();
-        Assert.Equal(publishCommitsFirst, await ExecuteScalarAsync<bool>(
+        Assert.Equal(publishMutatesFirst, await ExecuteScalarAsync<bool>(
             verificationConnection,
             "SELECT is_public FROM portfolio_games WHERE id = @portfolioGameId",
             parameters: new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId)));
-        Assert.Equal(publishCommitsFirst ? 1L : 0L, await ExecuteScalarAsync<long>(
+        Assert.Equal(publishMutatesFirst ? 1L : 0L, await ExecuteScalarAsync<long>(
             verificationConnection,
             "SELECT COUNT(*) FROM portfolio_game_sessions WHERE portfolio_game_id = @portfolioGameId",
             parameters: new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId)));
@@ -162,8 +175,11 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             masterCount: linkTable == "portfolio_game_masters" ? 2 : 1);
         await using var firstConnection = await database.OpenConnectionAsync();
         await using var secondConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
         await using var firstTransaction = await firstConnection.BeginTransactionAsync();
         await using var secondTransaction = await secondConnection.BeginTransactionAsync();
+        var firstPid = await GetBackendPidAsync(firstConnection, firstTransaction);
+        var secondPid = await GetBackendPidAsync(secondConnection, secondTransaction);
         var linkIds = linkTable == "portfolio_game_sessions" ? seed.SessionIds : seed.MasterIds;
 
         await ExecuteNonQueryAsync(
@@ -172,19 +188,19 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             firstTransaction,
             new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
             new NpgsqlParameter("linkId", linkIds[0]));
-        await ExecuteNonQueryAsync(
+        var secondDeleteTask = ExecuteNonQueryAsync(
             secondConnection,
             $"DELETE FROM {linkTable} WHERE portfolio_game_id = @portfolioGameId AND {linkColumn} = @linkId",
             secondTransaction,
             new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
             new NpgsqlParameter("linkId", linkIds[1]));
 
-        var commitStates = await Task.WhenAll(
-            CommitAndCaptureSqlStateAsync(firstTransaction),
-            CommitAndCaptureSqlStateAsync(secondTransaction));
-
-        Assert.Single(commitStates, state => state is null);
-        Assert.Single(commitStates, state => state == PostgresErrorCodes.CheckViolation);
+        await WaitUntilBlockedByAsync(observerConnection, secondPid, firstPid);
+        Assert.Null(await CommitAndCaptureSqlStateAsync(firstTransaction).WaitAsync(CommandTimeout));
+        Assert.Equal(1, await secondDeleteTask.WaitAsync(CommandTimeout));
+        Assert.Equal(
+            PostgresErrorCodes.CheckViolation,
+            await CommitAndCaptureSqlStateAsync(secondTransaction).WaitAsync(CommandTimeout));
 
         await using var verificationConnection = await database.OpenConnectionAsync();
         Assert.True(await ExecuteScalarAsync<bool>(
@@ -213,8 +229,11 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             masterCount: linkTable == "portfolio_game_masters" ? 2 : 1);
         await using var firstConnection = await database.OpenConnectionAsync();
         await using var secondConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
         await using var firstTransaction = await firstConnection.BeginTransactionAsync(IsolationLevel.RepeatableRead);
         await using var secondTransaction = await secondConnection.BeginTransactionAsync(IsolationLevel.RepeatableRead);
+        var firstPid = await GetBackendPidAsync(firstConnection, firstTransaction);
+        var secondPid = await GetBackendPidAsync(secondConnection, secondTransaction);
         var linkIds = linkTable == "portfolio_game_sessions" ? seed.SessionIds : seed.MasterIds;
 
         await ExecuteNonQueryAsync(
@@ -223,18 +242,21 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             firstTransaction,
             new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
             new NpgsqlParameter("linkId", linkIds[0]));
-        await ExecuteNonQueryAsync(
+        var secondDeleteTask = ExecuteNonQueryAsync(
             secondConnection,
             $"DELETE FROM {linkTable} WHERE portfolio_game_id = @portfolioGameId AND {linkColumn} = @linkId",
             secondTransaction,
             new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
             new NpgsqlParameter("linkId", linkIds[1]));
 
-        var commitStates = await Task.WhenAll(
-            CommitAndCaptureSqlStateAsync(firstTransaction),
-            CommitAndCaptureSqlStateAsync(secondTransaction));
-
-        Assert.All(commitStates, state => Assert.Equal(PostgresErrorCodes.FeatureNotSupported, state));
+        await WaitUntilBlockedByAsync(observerConnection, secondPid, firstPid);
+        Assert.Equal(
+            PostgresErrorCodes.FeatureNotSupported,
+            await CommitAndCaptureSqlStateAsync(firstTransaction).WaitAsync(CommandTimeout));
+        Assert.Equal(1, await secondDeleteTask.WaitAsync(CommandTimeout));
+        Assert.Equal(
+            PostgresErrorCodes.FeatureNotSupported,
+            await CommitAndCaptureSqlStateAsync(secondTransaction).WaitAsync(CommandTimeout));
 
         await using var verificationConnection = await database.OpenConnectionAsync();
         Assert.True(await ExecuteScalarAsync<bool>(
@@ -273,43 +295,57 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
     [InlineData(true)]
     [InlineData(false)]
     public async Task RepeatableReadDraftLinkDeleteRacingPublish_ShouldBeRejectedWithoutInvalidPublicCard(
-        bool publishCommitsFirst)
+        bool deleteMutatesFirst)
     {
         var database = await fixture.CreateMigratedDatabaseAsync();
         await using var seedConnection = await database.OpenConnectionAsync();
         var seed = await SeedCardAsync(seedConnection, isPublic: false);
         await using var deleteConnection = await database.OpenConnectionAsync();
         await using var publishConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
         await using var deleteTransaction = await deleteConnection.BeginTransactionAsync(IsolationLevel.RepeatableRead);
         await using var publishTransaction = await publishConnection.BeginTransactionAsync();
+        var deletePid = await GetBackendPidAsync(deleteConnection, deleteTransaction);
+        var publishPid = await GetBackendPidAsync(publishConnection, publishTransaction);
 
-        await ExecuteNonQueryAsync(
-            deleteConnection,
-            "DELETE FROM portfolio_game_sessions WHERE portfolio_game_id = @portfolioGameId",
-            deleteTransaction,
-            new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId));
-        await ExecuteNonQueryAsync(
-            publishConnection,
-            """
-            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));
+        if (deleteMutatesFirst)
+        {
+            Assert.Equal(1, await DeletePortfolioGameLinksAsync(
+                deleteConnection,
+                deleteTransaction,
+                "portfolio_game_sessions",
+                seed.PortfolioGameId));
+            var publishTask = PublishPortfolioGameAsync(
+                publishConnection,
+                publishTransaction,
+                seed.PortfolioGameId);
 
-        await AcquirePortfolioValidationLockAsync(
-            publishCommitsFirst ? publishConnection : deleteConnection,
-            publishCommitsFirst ? publishTransaction : deleteTransaction);
+            await WaitUntilBlockedByAsync(observerConnection, publishPid, deletePid);
+            Assert.Equal(
+                PostgresErrorCodes.FeatureNotSupported,
+                await CommitAndCaptureSqlStateAsync(deleteTransaction).WaitAsync(CommandTimeout));
+            Assert.Equal(1, await publishTask.WaitAsync(CommandTimeout));
+            Assert.Null(await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
+        }
+        else
+        {
+            Assert.Equal(1, await PublishPortfolioGameAsync(
+                publishConnection,
+                publishTransaction,
+                seed.PortfolioGameId));
+            var deleteTask = DeletePortfolioGameLinksAsync(
+                deleteConnection,
+                deleteTransaction,
+                "portfolio_game_sessions",
+                seed.PortfolioGameId);
 
-        var commitStates = await Task.WhenAll(
-            CommitAndCaptureSqlStateAsync(deleteTransaction),
-            CommitAndCaptureSqlStateAsync(publishTransaction)).WaitAsync(CommandTimeout);
-
-        Assert.Equal(PostgresErrorCodes.FeatureNotSupported, commitStates[0]);
-        Assert.Null(commitStates[1]);
+            await WaitUntilBlockedByAsync(observerConnection, deletePid, publishPid);
+            Assert.Null(await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
+            Assert.Equal(1, await deleteTask.WaitAsync(CommandTimeout));
+            Assert.Equal(
+                PostgresErrorCodes.FeatureNotSupported,
+                await CommitAndCaptureSqlStateAsync(deleteTransaction).WaitAsync(CommandTimeout));
+        }
 
         await using var verificationConnection = await database.OpenConnectionAsync();
         Assert.True(await ExecuteScalarAsync<bool>(
@@ -376,74 +412,36 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
     }
 
     [Fact]
-    public async Task ConcurrentBatchFutureReschedules_ShouldLockPublicCardsInStableOrderWithoutDeadlock()
+    public async Task ConcurrentBatchFutureReschedules_ShouldSerializeBeforeSessionRowsWithoutDeadlock()
     {
         var database = await fixture.CreateMigratedDatabaseAsync();
         await using var seedConnection = await database.OpenConnectionAsync();
         var firstSeed = await SeedCardAsync(seedConnection, isPublic: true, sessionCount: 2);
         var secondSeed = await SeedCardAsync(seedConnection, isPublic: true, sessionCount: 2);
 
-        await ExecuteNonQueryAsync(
-            seedConnection,
-            """
-            CREATE FUNCTION wait_for_portfolio_card_unpublish_gate()
-            RETURNS TRIGGER
-            LANGUAGE plpgsql
-            AS $$
-            BEGIN
-                PERFORM pg_advisory_xact_lock(20260601, 108);
-                RETURN NULL;
-            END;
-            $$;
-
-            CREATE TRIGGER trg_wait_for_portfolio_card_unpublish_gate
-            AFTER UPDATE OF is_public ON portfolio_games
-            FOR EACH ROW
-            WHEN (OLD.is_public = true AND NEW.is_public = false)
-            EXECUTE FUNCTION wait_for_portfolio_card_unpublish_gate();
-            """);
-
         await using var firstConnection = await database.OpenConnectionAsync();
         await using var secondConnection = await database.OpenConnectionAsync();
-        await using var gateConnection = await database.OpenConnectionAsync();
         await using var observerConnection = await database.OpenConnectionAsync();
         await using var firstTransaction = await firstConnection.BeginTransactionAsync();
         await using var secondTransaction = await secondConnection.BeginTransactionAsync();
-        await using var gateTransaction = await gateConnection.BeginTransactionAsync();
         var firstPid = await GetBackendPidAsync(firstConnection, firstTransaction);
         var secondPid = await GetBackendPidAsync(secondConnection, secondTransaction);
-        var gatePid = await GetBackendPidAsync(gateConnection, gateTransaction);
-        await AcquireBatchRescheduleGateAsync(gateConnection, gateTransaction);
 
         await RescheduleSessionsAsync(
             firstConnection,
             firstTransaction,
             firstSeed.SessionIds[0],
             secondSeed.SessionIds[0]);
-        await RescheduleSessionsAsync(
+        var secondRescheduleTask = RescheduleSessionsAsync(
             secondConnection,
             secondTransaction,
             secondSeed.SessionIds[1],
             firstSeed.SessionIds[1]);
 
-        var firstCommitTask = CommitAndCaptureSqlStateAsync(firstTransaction);
-        var secondCommitTask = CommitAndCaptureSqlStateAsync(secondTransaction);
-        var gateBlockedPid = await WaitUntilEitherBlockedByAsync(
-            observerConnection,
-            firstPid,
-            secondPid,
-            gatePid);
-        await WaitUntilBlockedByAnyAsync(
-            observerConnection,
-            gateBlockedPid == firstPid ? secondPid : firstPid,
-            gatePid,
-            gateBlockedPid);
-
-        await gateTransaction.CommitAsync().WaitAsync(CommandTimeout);
-
-        var commitStates = await Task.WhenAll(firstCommitTask, secondCommitTask).WaitAsync(CommandTimeout);
-
-        Assert.All(commitStates, Assert.Null);
+        await WaitUntilBlockedByAsync(observerConnection, secondPid, firstPid);
+        Assert.Null(await CommitAndCaptureSqlStateAsync(firstTransaction).WaitAsync(CommandTimeout));
+        Assert.Equal(2, await secondRescheduleTask.WaitAsync(CommandTimeout));
+        Assert.Null(await CommitAndCaptureSqlStateAsync(secondTransaction).WaitAsync(CommandTimeout));
 
         await using var verificationConnection = await database.OpenConnectionAsync();
         Assert.Equal(0, await ExecuteScalarAsync<long>(
@@ -504,31 +502,19 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
         var publishPid = await GetBackendPidAsync(publishConnection, publishTransaction);
         var reschedulePid = await GetBackendPidAsync(rescheduleConnection, rescheduleTransaction);
 
-        await ExecuteNonQueryAsync(
+        Assert.Equal(1, await PublishPortfolioGameAsync(
             publishConnection,
-            """
-            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));
-        await ExecuteNonQueryAsync(
+            seed.PortfolioGameId));
+        var rescheduleTask = ExecuteNonQueryAsync(
             rescheduleConnection,
             "UPDATE sessions SET scheduled_at = now() + interval '1 day' WHERE id = @sessionId",
             rescheduleTransaction,
             new NpgsqlParameter("sessionId", seed.SessionIds[0]));
 
-        var forceRescheduleTriggerTask = ExecuteNonQueryAsync(
-            rescheduleConnection,
-            "SET CONSTRAINTS trg_sessions_unpublish_public_portfolio_games_for_future_reschedule IMMEDIATE",
-            rescheduleTransaction);
         await WaitUntilBlockedByAsync(observerConnection, reschedulePid, publishPid);
-
         Assert.Null(await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
-        await forceRescheduleTriggerTask.WaitAsync(CommandTimeout);
+        Assert.Equal(1, await rescheduleTask.WaitAsync(CommandTimeout));
         await rescheduleTransaction.CommitAsync().WaitAsync(CommandTimeout);
 
         await using var verificationConnection = await database.OpenConnectionAsync();
@@ -563,15 +549,11 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
 
         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,
@@ -581,9 +563,9 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             rescheduleConnection,
             "SET CONSTRAINTS trg_sessions_unpublish_public_portfolio_games_for_future_reschedule IMMEDIATE",
             rescheduleTransaction);
-        await WaitUntilBlockedByAsync(observerConnection, reschedulePid, gatePid);
+        await forceRescheduleTriggerTask.WaitAsync(CommandTimeout);
 
-        await ExecuteNonQueryAsync(
+        var publishMutationTask = ExecuteNonQueryAsync(
             publishConnection,
             """
             INSERT INTO portfolio_game_sessions (portfolio_game_id, session_id)
@@ -598,14 +580,13 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             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 WaitUntilBlockedByAsync(observerConnection, publishPid, reschedulePid);
         await rescheduleTransaction.CommitAsync().WaitAsync(CommandTimeout);
+        await publishMutationTask.WaitAsync(CommandTimeout);
 
-        Assert.Equal(PostgresErrorCodes.CheckViolation, await publishCommitTask.WaitAsync(CommandTimeout));
+        Assert.Equal(
+            PostgresErrorCodes.CheckViolation,
+            await CommitAndCaptureSqlStateAsync(publishTransaction).WaitAsync(CommandTimeout));
 
         await using var verificationConnection = await database.OpenConnectionAsync();
         Assert.False(await ExecuteScalarAsync<bool>(
@@ -631,6 +612,78 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             ]));
     }
 
+    [Fact]
+    public async Task PortfolioSessionLinkInsert_ShouldAcquirePublicationLockBeforeRows()
+    {
+        var database = await fixture.CreateMigratedDatabaseAsync();
+        await using var seedConnection = await database.OpenConnectionAsync();
+        var seed = await SeedCardAsync(seedConnection, isPublic: false);
+        var sessionId = 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", sessionId),
+                new NpgsqlParameter("groupId", seed.GroupId)
+            ]);
+
+        await using var insertConnection = await database.OpenConnectionAsync();
+        await using var gateConnection = await database.OpenConnectionAsync();
+        await using var observerConnection = await database.OpenConnectionAsync();
+        await using var insertTransaction = await insertConnection.BeginTransactionAsync();
+        await using var gateTransaction = await gateConnection.BeginTransactionAsync();
+        var insertPid = await GetBackendPidAsync(insertConnection, insertTransaction);
+        var gatePid = await GetBackendPidAsync(gateConnection, gateTransaction);
+        await AcquirePortfolioValidationLockAsync(gateConnection, gateTransaction);
+
+        var insertTask = ExecuteNonQueryAsync(
+            insertConnection,
+            """
+            INSERT INTO portfolio_game_sessions (portfolio_game_id, session_id)
+            VALUES (@portfolioGameId, @sessionId);
+            """,
+            insertTransaction,
+            new NpgsqlParameter("portfolioGameId", seed.PortfolioGameId),
+            new NpgsqlParameter("sessionId", sessionId));
+
+        await WaitUntilBlockedByAsync(observerConnection, insertPid, gatePid);
+        await gateTransaction.CommitAsync().WaitAsync(CommandTimeout);
+
+        Assert.Equal(1, await insertTask.WaitAsync(CommandTimeout));
+        await insertTransaction.RollbackAsync().WaitAsync(CommandTimeout);
+    }
+
+    [Fact]
+    public async Task FutureReschedule_ShouldAcquirePublicationLockBeforeSessionRows()
+    {
+        var database = await fixture.CreateMigratedDatabaseAsync();
+        await using var seedConnection = await database.OpenConnectionAsync();
+        var seed = await SeedCardAsync(seedConnection, isPublic: true);
+        await using var rescheduleConnection = 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 gateTransaction = await gateConnection.BeginTransactionAsync();
+        var reschedulePid = await GetBackendPidAsync(rescheduleConnection, rescheduleTransaction);
+        var gatePid = await GetBackendPidAsync(gateConnection, gateTransaction);
+        await AcquirePortfolioValidationLockAsync(gateConnection, gateTransaction);
+
+        var rescheduleTask = RescheduleSessionAsync(
+            rescheduleConnection,
+            rescheduleTransaction,
+            seed.SessionIds[0]);
+
+        await WaitUntilBlockedByAsync(observerConnection, reschedulePid, gatePid);
+        await gateTransaction.CommitAsync().WaitAsync(CommandTimeout);
+
+        Assert.Equal(1, await rescheduleTask.WaitAsync(CommandTimeout));
+        await rescheduleTransaction.RollbackAsync().WaitAsync(CommandTimeout);
+    }
+
     [Fact]
     public async Task RepeatableReadStaleSnapshotFutureReschedule_ShouldBeRejectedWithoutInvalidPublicCard()
     {
@@ -709,8 +762,8 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
     [Theory]
     [InlineData(true)]
     [InlineData(false)]
-    public async Task ConcurrentSessionDeleteAndFutureReschedule_ShouldSerializeSessionBeforeCardWithoutDeadlock(
-        bool deleteLocksSessionFirst)
+    public async Task ConcurrentSessionDeleteAndFutureReschedule_ShouldSerializeMutationGateBeforeRowsWithoutDeadlock(
+        bool deleteMutatesFirst)
     {
         var database = await fixture.CreateMigratedDatabaseAsync();
         await using var seedConnection = await database.OpenConnectionAsync();
@@ -723,8 +776,9 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
         var deletePid = await GetBackendPidAsync(deleteConnection, deleteTransaction);
         var reschedulePid = await GetBackendPidAsync(rescheduleConnection, rescheduleTransaction);
 
-        if (deleteLocksSessionFirst)
+        if (deleteMutatesFirst)
         {
+            await AcquirePortfolioValidationLockAsync(deleteConnection, deleteTransaction);
             await LockSessionAsync(deleteConnection, deleteTransaction, seed.SessionIds[0]);
             var rescheduleTask = RescheduleSessionAsync(
                 rescheduleConnection,
@@ -967,16 +1021,6 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             transaction);
     }
 
-    private static Task<int> AcquireBatchRescheduleGateAsync(
-        NpgsqlConnection connection,
-        NpgsqlTransaction transaction)
-    {
-        return ExecuteNonQueryAsync(
-            connection,
-            "SELECT pg_advisory_xact_lock(20260601, 108)",
-            transaction);
-    }
-
     private static Task<int> GetBackendPidAsync(
         NpgsqlConnection connection,
         NpgsqlTransaction transaction)
@@ -996,6 +1040,37 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             new NpgsqlParameter("sessionId", sessionId));
     }
 
+    private static Task<int> PublishPortfolioGameAsync(
+        NpgsqlConnection connection,
+        NpgsqlTransaction transaction,
+        Guid portfolioGameId)
+    {
+        return ExecuteNonQueryAsync(
+            connection,
+            """
+            UPDATE portfolio_games
+            SET is_public = true,
+                published_at = COALESCE(published_at, now()),
+                updated_at = now()
+            WHERE id = @portfolioGameId
+            """,
+            transaction,
+            new NpgsqlParameter("portfolioGameId", portfolioGameId));
+    }
+
+    private static Task<int> DeletePortfolioGameLinksAsync(
+        NpgsqlConnection connection,
+        NpgsqlTransaction transaction,
+        string linkTable,
+        Guid portfolioGameId)
+    {
+        return ExecuteNonQueryAsync(
+            connection,
+            $"DELETE FROM {linkTable} WHERE portfolio_game_id = @portfolioGameId",
+            transaction,
+            new NpgsqlParameter("portfolioGameId", portfolioGameId));
+    }
+
     private static Task<int> RescheduleSessionAsync(
         NpgsqlConnection connection,
         NpgsqlTransaction transaction,
@@ -1036,6 +1111,7 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
         Guid portfolioGameId,
         Guid sessionId)
     {
+        await AcquirePortfolioValidationLockAsync(connection, transaction);
         await LockSessionAsync(connection, transaction, sessionId);
         await UnpublishAndDeleteSessionAsync(connection, transaction, portfolioGameId, sessionId);
         await transaction.CommitAsync().WaitAsync(CommandTimeout);
@@ -1091,74 +1167,6 @@ public sealed class PortfolioMigrationPostgresTests(PortfolioMigrationPostgresFi
             $"PostgreSQL backend {blockedPid} was not blocked by backend {blockingPid} within {CommandTimeout}.");
     }
 
-    private static async Task<int> WaitUntilEitherBlockedByAsync(
-        NpgsqlConnection observerConnection,
-        int firstBlockedPid,
-        int secondBlockedPid,
-        int blockingPid)
-    {
-        using var timeout = new CancellationTokenSource(CommandTimeout);
-        while (!timeout.IsCancellationRequested)
-        {
-            var blockedPid = await ExecuteScalarAsync<int>(
-                observerConnection,
-                """
-                SELECT CASE
-                    WHEN @blockingPid = ANY (pg_blocking_pids(@firstBlockedPid)) THEN @firstBlockedPid
-                    WHEN @blockingPid = ANY (pg_blocking_pids(@secondBlockedPid)) THEN @secondBlockedPid
-                    ELSE 0
-                END
-                """,
-                parameters:
-                [
-                    new NpgsqlParameter("firstBlockedPid", firstBlockedPid),
-                    new NpgsqlParameter("secondBlockedPid", secondBlockedPid),
-                    new NpgsqlParameter("blockingPid", blockingPid)
-                ]);
-            if (blockedPid != 0)
-            {
-                return blockedPid;
-            }
-
-            await Task.Yield();
-        }
-
-        throw new TimeoutException(
-            $"Neither PostgreSQL backend {firstBlockedPid} nor {secondBlockedPid} was blocked by backend {blockingPid} within {CommandTimeout}.");
-    }
-
-    private static async Task WaitUntilBlockedByAnyAsync(
-        NpgsqlConnection observerConnection,
-        int blockedPid,
-        int firstBlockingPid,
-        int secondBlockingPid)
-    {
-        using var timeout = new CancellationTokenSource(CommandTimeout);
-        while (!timeout.IsCancellationRequested)
-        {
-            if (await ExecuteScalarAsync<bool>(
-                    observerConnection,
-                    """
-                    SELECT @firstBlockingPid = ANY (pg_blocking_pids(@blockedPid))
-                        OR @secondBlockingPid = ANY (pg_blocking_pids(@blockedPid))
-                    """,
-                    parameters:
-                    [
-                        new NpgsqlParameter("blockedPid", blockedPid),
-                        new NpgsqlParameter("firstBlockingPid", firstBlockingPid),
-                        new NpgsqlParameter("secondBlockingPid", secondBlockingPid)
-                    ]))
-            {
-                return;
-            }
-
-            await Task.Yield();
-        }
-
-        throw new TimeoutException(
-            $"PostgreSQL backend {blockedPid} was not blocked by backend {firstBlockingPid} or {secondBlockingPid} within {CommandTimeout}.");
-    }
-
     private static async Task<int> ExecuteNonQueryAsync(
         NpgsqlConnection connection,
         string sql,

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

@@ -36,6 +36,13 @@ public sealed class PortfolioMigrationTests
         Assert.Contains("CREATE INDEX ix_portfolio_game_reviews_moderator ON portfolio_game_reviews (moderated_by_player_id) WHERE moderated_by_player_id IS NOT NULL;", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("CREATE INDEX ix_portfolio_game_reviews_public ON portfolio_game_reviews (portfolio_game_id, created_at DESC) WHERE moderation_status = 'Approved' AND publication_consent_at IS NOT NULL;", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("CREATE INDEX ix_portfolio_game_reviews_pending ON portfolio_game_reviews (portfolio_game_id, created_at DESC) WHERE moderation_status = 'Pending';", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE FUNCTION lock_portfolio_publication_mutation() RETURNS TRIGGER LANGUAGE plpgsql", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_portfolio_games_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE OF is_public ON portfolio_games FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_portfolio_game_sessions_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_sessions FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_portfolio_game_masters_lock_publication_mutation BEFORE INSERT OR DELETE OR UPDATE ON portfolio_game_masters FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_sessions_lock_portfolio_publication_mutation BEFORE DELETE OR UPDATE OF scheduled_at ON sessions FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_game_groups_lock_portfolio_publication_mutation_before_delete BEFORE DELETE ON game_groups FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
+        Assert.Contains("CREATE TRIGGER trg_players_lock_portfolio_publication_mutation_before_delete BEFORE DELETE ON players FOR EACH STATEMENT EXECUTE FUNCTION lock_portfolio_publication_mutation();", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("CREATE FUNCTION validate_public_portfolio_game_required_links() RETURNS TRIGGER LANGUAGE plpgsql", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("PERFORM pg_advisory_xact_lock(20260530, 108);", normalizedMigration, StringComparison.Ordinal);
         Assert.Contains("current_setting('transaction_isolation') <> 'read committed'", normalizedMigration, StringComparison.Ordinal);

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

@@ -10,11 +10,18 @@ public sealed class PortfolioSessionDeletionSourceTests
 
         const string sessionLock =
             "FROM sessions s WHERE s.id = @SessionId FOR UPDATE OF s";
+        const string advisoryLock =
+            "SELECT pg_advisory_xact_lock(20260530, 108)";
         const string unpublish =
             "UPDATE portfolio_games pg SET is_public = false, updated_at = now() FROM portfolio_game_sessions pgs WHERE pgs.portfolio_game_id = pg.id AND pgs.session_id = @SessionId AND pg.is_public = true";
 
+        Assert.Contains(advisoryLock, source, StringComparison.Ordinal);
         Assert.Contains(sessionLock, source, StringComparison.Ordinal);
         Assert.Contains(unpublish, source, StringComparison.Ordinal);
+        Assert.True(
+            source.IndexOf(advisoryLock, StringComparison.Ordinal) <
+            source.IndexOf(sessionLock, StringComparison.Ordinal),
+            "The shared delete path must acquire the portfolio advisory lock before locking the session.");
         Assert.True(
             source.IndexOf(sessionLock, StringComparison.Ordinal) <
             source.IndexOf(unpublish, StringComparison.Ordinal),
@@ -33,12 +40,19 @@ public sealed class PortfolioSessionDeletionSourceTests
 
         const string sessionLock =
             "SELECT s.id FROM sessions s JOIN game_groups g ON g.id = s.group_id WHERE s.id = @SessionId AND g.platform = 'Discord' AND g.external_group_id = @GuildId FOR UPDATE OF s";
+        const string advisoryLock =
+            "SELECT pg_advisory_xact_lock(20260530, 108)";
         const string unpublish =
             "UPDATE portfolio_games pg SET is_public = false, updated_at = now() FROM portfolio_game_sessions pgs JOIN sessions s ON s.id = pgs.session_id JOIN game_groups g ON g.id = s.group_id WHERE pgs.portfolio_game_id = pg.id AND s.id = @SessionId AND g.platform = 'Discord' AND g.external_group_id = @GuildId AND pg.is_public = true";
 
+        Assert.Contains(advisoryLock, source, StringComparison.Ordinal);
         Assert.Contains(sessionLock, source, StringComparison.Ordinal);
         Assert.Contains(unpublish, source, StringComparison.Ordinal);
         Assert.Contains("AND p.platform = 'Discord'", source, StringComparison.Ordinal);
+        Assert.True(
+            source.IndexOf(advisoryLock, StringComparison.Ordinal) <
+            source.IndexOf(sessionLock, StringComparison.Ordinal),
+            "The Discord delete path must acquire the portfolio advisory lock before locking the guild-scoped session.");
         Assert.True(
             source.IndexOf(sessionLock, StringComparison.Ordinal) <
             source.IndexOf(unpublish, StringComparison.Ordinal),