Announce playoff eliminations to Discord on bracket generation

Teams that miss the playoffs (NBA-style brackets) or are knocked out in the
group stage (FIFA group->knockout) were correctly marked eliminated but never
announced to league Discord channels — the elimination intents never called
recalculateAffectedLeagues, and these 0-pt eliminations have no score delta or
match to surface in the existing scored-match/standings sections.

Add an 'Eliminated' section to the standings-update embed and feed newly
eliminated drafted participants through recalculateAffectedLeagues via a new
eliminatedParticipantIds option. Wire it into generate-bracket, generate-groups,
and populate-knockout, gated to fantasy events only (qualifying-point majors like
tennis/CS2 are excluded) and scoped to participants newly eliminated by the run.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E5gLy3K9vW65ogG8GTCjWE

app/models/scoring-calculator.ts

@@ -9,7 +9,7 @@ import {
 } from "./scoring-rules";
 import { getSeasonResults } from "./participant-season-result";
 import { updateProbabilitiesAfterResult } from "~/services/probability-updater";
-import { sendStandingsUpdateNotification, type ScoredMatch } from "~/services/discord";
+import { sendStandingsUpdateNotification, type ScoredMatch, type EliminatedTeam } from "~/services/discord";
 import { BRACKET_TEMPLATES, type BracketRound } from "~/lib/bracket-templates";
 import { doesLoserAdvance, findPlayoffMatchesByEventId } from "~/models/playoff-match";
 import { getUserDisplayName } from "~/models/user";
@@ -1657,7 +1657,7 @@ export async function recalculateStandings(
 export async function recalculateAffectedLeagues(
   sportsSeasonId: string,
   providedDb?: ReturnType<typeof database>,
-  options?: { eventName?: string; eventId?: string; matchIds?: string[]; skipDiscord?: boolean }
+  options?: { eventName?: string; eventId?: string; matchIds?: string[]; skipDiscord?: boolean; eliminatedParticipantIds?: string[] }
 ): Promise<void> {
   const db = providedDb || database();
 
@@ -1726,6 +1726,18 @@ export async function recalculateAffectedLeagues(
     for (const r of loserResults) finalizedLoserIds.add(r.participantId);
   }
 
+  // Look up names for participants eliminated by this action (e.g. bracket/knockout
+  // generation). These produce no score delta, so they're surfaced via a dedicated
+  // "Eliminated" section rather than the match/standings-change sections.
+  const eliminatedIds = options?.eliminatedParticipantIds ?? [];
+  const eliminatedNameById = new Map<string, string>();
+  if (eliminatedIds.length > 0) {
+    const eliminatedParticipants = await db.query.seasonParticipants.findMany({
+      where: inArray(schema.seasonParticipants.id, eliminatedIds),
+    });
+    for (const p of eliminatedParticipants) eliminatedNameById.set(p.id, p.name);
+  }
+
   // Recalculate each affected season
   for (const seasonId of seasonIds) {
     // Capture standings before recalculation for delta calculation
@@ -1853,11 +1865,38 @@ export async function recalculateAffectedLeagues(
       }
     }
 
-    // Skip notification if scores didn't change AND no match has a displayable username.
+    // Build the eliminated-teams section: drafted participants in this league that
+    // were knocked out by this action (bracket/knockout generation). These have a
+    // 0-pt result and no match, so they only surface here.
+    let eliminatedTeams: EliminatedTeam[] | undefined;
+    if (eliminatedIds.length > 0) {
+      const draftPicks = await db.query.draftPicks.findMany({
+        where: eq(schema.draftPicks.seasonId, seasonId),
+      });
+      const teamIdByParticipantId = new Map(
+        draftPicks.map((p) => [p.participantId, p.teamId])
+      );
+      const teams = eliminatedIds
+        .filter((id) => teamIdByParticipantId.has(id))
+        .map((id) => {
+          const teamId = teamIdByParticipantId.get(id);
+          const ownerId = teamId ? ownerIdByTeamId.get(teamId) : undefined;
+          return {
+            participantName: eliminatedNameById.get(id) ?? "Unknown",
+            username: ownerId ? usernameByUserId.get(ownerId) : undefined,
+            discordUserId: ownerId ? discordIdByUserId.get(ownerId) : undefined,
+          };
+        });
+      if (teams.length > 0) eliminatedTeams = teams;
+    }
+
+    // Skip notification if scores didn't change AND no match has a displayable
+    // username AND there's nothing eliminated to announce.
     const hasScoredMatchesToShow = scoredMatches?.some(
       (m) => m.winnerUsername !== undefined || m.loserUsername !== undefined
     );
-    if (!hasChanges && !hasScoredMatchesToShow) continue;
+    const hasEliminatedToShow = (eliminatedTeams?.length ?? 0) > 0;
+    if (!hasChanges && !hasScoredMatchesToShow && !hasEliminatedToShow) continue;
 
     const standings = afterStandings.map((s) => ({
       teamId: s.teamId,
@@ -1878,6 +1917,7 @@ export async function recalculateAffectedLeagues(
         sportName,
         eventName: options?.eventName,
         scoredMatches,
+        eliminatedTeams,
       });
     } catch (err) {
       // Log but don't fail the scoring pipeline if Discord is unreachable

app/routes/admin.sports-seasons.$id.events.$eventId.bracket.server.ts

@@ -303,9 +303,18 @@ export async function action({ request, params }: Route.ActionArgs) {
         // Create a set of participants in the bracket for fast lookup
         const participantsInBracket = new Set(participantIds);
 
+        // Participants that already had a result before this run — used to scope
+        // the Discord announcement to teams newly eliminated by this action.
+        const existingResults = await findParticipantResultsBySportsSeasonId(params.id);
+        const alreadyHadResult = new Set(existingResults.map((r) => r.participantId));
+
         // Mark participants NOT in the bracket as eliminated
+        const newlyEliminatedIds: string[] = [];
         for (const participant of allParticipants) {
           if (!participantsInBracket.has(participant.id)) {
+            if (!alreadyHadResult.has(participant.id)) {
+              newlyEliminatedIds.push(participant.id);
+            }
             await setParticipantResult(
               participant.id,
               event.sportsSeasonId,
@@ -315,6 +324,16 @@ export async function action({ request, params }: Route.ActionArgs) {
         }
 
         logger.log(`[BracketGeneration] Marked ${allParticipants.length - participantIds.length} participants as eliminated`);
+
+        // Announce eliminations to league Discord channels (fantasy events only;
+        // QPs like tennis/CS2 majors don't get elimination announcements).
+        if (!event.isQualifyingEvent && newlyEliminatedIds.length > 0) {
+          await recalculateAffectedLeagues(event.sportsSeasonId, database(), {
+            eventId: event.id,
+            eventName: event.name ?? undefined,
+            eliminatedParticipantIds: newlyEliminatedIds,
+          });
+        }
       }
 
       // Update the event to store the template ID, scoring start round, and region config
@@ -986,14 +1005,30 @@ export async function action({ request, params }: Route.ActionArgs) {
 
       // Eliminate participants from this sport season who are not in any group
       const allParticipants = await findParticipantsBySportsSeasonId(params.id);
+      const existingResults = await findParticipantResultsBySportsSeasonId(params.id);
+      const alreadyHadResult = new Set(existingResults.map((r) => r.participantId));
+      const newlyEliminatedIds: string[] = [];
       let eliminatedCount = 0;
       for (const participant of allParticipants) {
         if (!uniqueParticipants.has(participant.id)) {
+          if (!alreadyHadResult.has(participant.id)) {
+            newlyEliminatedIds.push(participant.id);
+          }
           await setParticipantResult(participant.id, params.id, 0);
           eliminatedCount++;
         }
       }
 
+      // Announce eliminations to league Discord channels (fantasy events only).
+      const groupsEvent = await getScoringEventById(params.eventId);
+      if (groupsEvent && !groupsEvent.isQualifyingEvent && newlyEliminatedIds.length > 0) {
+        await recalculateAffectedLeagues(groupsEvent.sportsSeasonId, database(), {
+          eventId: groupsEvent.id,
+          eventName: groupsEvent.name ?? undefined,
+          eliminatedParticipantIds: newlyEliminatedIds,
+        });
+      }
+
       return {
         success: `Groups and knockout bracket structure created successfully${eliminatedCount > 0 ? ` (${eliminatedCount} participant(s) not in any group marked as eliminated)` : ""}`,
       };
@@ -1119,7 +1154,13 @@ export async function action({ request, params }: Route.ActionArgs) {
 
       // Mark eliminated group participants with finalPosition = 0
       const eliminatedIds = await getEliminatedParticipantIds(params.eventId);
+      const existingResults = await findParticipantResultsBySportsSeasonId(params.id);
+      const alreadyHadResult = new Set(existingResults.map((r) => r.participantId));
+      const newlyEliminatedIds: string[] = [];
       for (const participantId of eliminatedIds) {
+        if (!alreadyHadResult.has(participantId)) {
+          newlyEliminatedIds.push(participantId);
+        }
         await setParticipantResult(participantId, event.sportsSeasonId, 0);
       }
 
@@ -1127,6 +1168,16 @@ export async function action({ request, params }: Route.ActionArgs) {
         `[PopulateKnockout] Assigned 32 participants to knockout, marked ${eliminatedIds.length} as eliminated`
       );
 
+      // Announce group-stage eliminations to league Discord channels (fantasy
+      // events only; QPs don't get elimination announcements).
+      if (!event.isQualifyingEvent && newlyEliminatedIds.length > 0) {
+        await recalculateAffectedLeagues(event.sportsSeasonId, database(), {
+          eventId: event.id,
+          eventName: event.name ?? undefined,
+          eliminatedParticipantIds: newlyEliminatedIds,
+        });
+      }
+
       return { success: "Knockout bracket populated successfully" };
     } catch (error) {
       logger.error("Error populating knockout:", error);

app/services/__tests__/discord.test.ts

@@ -441,6 +441,70 @@ describe("sendStandingsUpdateNotification", () => {
     expect(desc).not.toContain("Alpha");
     expect(desc).not.toContain("Beta");
   });
+
+  it("lists eliminated teams with their managers", async () => {
+    await sendStandingsUpdateNotification({
+      webhookUrl: WEBHOOK_URL,
+      seasonName: "My League 2025",
+      standings: [{ teamId: "a", teamName: "Alpha", totalPoints: 100, rank: 1 }],
+      previousStandings: new Map([["a", 100]]),
+      eliminatedTeams: [
+        { participantName: "Phoenix Suns", username: "manager1" },
+        { participantName: "Toronto Raptors" },
+      ],
+    });
+
+    const desc = getDescription();
+    expect(desc).toContain("**Eliminated**");
+    expect(desc).toContain("• **Phoenix Suns (manager1)**");
+    expect(desc).toContain("• **Toronto Raptors**");
+  });
+
+  it("uses Discord mention for opted-in eliminated managers and pings them", async () => {
+    await sendStandingsUpdateNotification({
+      webhookUrl: WEBHOOK_URL,
+      seasonName: "My League 2025",
+      standings: [{ teamId: "a", teamName: "Alpha", totalPoints: 100, rank: 1 }],
+      previousStandings: new Map([["a", 100]]),
+      eliminatedTeams: [
+        { participantName: "Phoenix Suns", username: "manager1", discordUserId: "555" },
+      ],
+    });
+
+    const desc = getDescription();
+    expect(desc).toContain("• **Phoenix Suns (<@555>)**");
+    expect(desc).not.toContain("manager1");
+
+    const payload = getPayload();
+    expect(payload.content).toBe("<@555>");
+    expect(payload.allowed_mentions).toEqual({ parse: [], users: ["555"] });
+  });
+
+  it("escapes Discord markdown in eliminated team names", async () => {
+    await sendStandingsUpdateNotification({
+      webhookUrl: WEBHOOK_URL,
+      seasonName: "My League 2025",
+      standings: [{ teamId: "a", teamName: "Alpha", totalPoints: 100, rank: 1 }],
+      previousStandings: new Map([["a", 100]]),
+      eliminatedTeams: [{ participantName: "Team__Bold", username: "user_name" }],
+    });
+
+    const desc = getDescription();
+    expect(desc).toContain("Team\\_\\_Bold");
+    expect(desc).toContain("user\\_name");
+  });
+
+  it("omits the eliminated section when none provided", async () => {
+    await sendStandingsUpdateNotification({
+      webhookUrl: WEBHOOK_URL,
+      seasonName: "My League 2025",
+      standings: [{ teamId: "a", teamName: "Alpha", totalPoints: 150, rank: 1 }],
+      previousStandings: new Map([["a", 125]]),
+    });
+
+    const desc = getDescription();
+    expect(desc).not.toContain("**Eliminated**");
+  });
 });
 
 describe("sendDraftOrderNotification", () => {

app/services/discord.ts

@@ -81,6 +81,12 @@ export interface ScoredMatch {
   loserDiscordUserId?: string;
 }
 
+export interface EliminatedTeam {
+  participantName: string;
+  username?: string;
+  discordUserId?: string;
+}
+
 export async function sendStandingsUpdateNotification({
   webhookUrl,
   seasonName,
@@ -90,6 +96,7 @@ export async function sendStandingsUpdateNotification({
   sportName,
   eventName,
   scoredMatches,
+  eliminatedTeams,
 }: {
   webhookUrl: string;
   seasonName: string;
@@ -99,6 +106,7 @@ export async function sendStandingsUpdateNotification({
   sportName?: string;
   eventName?: string;
   scoredMatches?: ScoredMatch[];
+  eliminatedTeams?: EliminatedTeam[];
 }): Promise<void> {
   const sections: string[] = [];
 
@@ -136,6 +144,24 @@ export async function sendStandingsUpdateNotification({
     }
   }
 
+  // Eliminated teams section — drafted teams knocked out when a bracket/knockout
+  // was generated (e.g. NBA teams that missed the playoffs, FIFA group-stage
+  // losers). These produce no score change, so they wouldn't appear above.
+  if (eliminatedTeams && eliminatedTeams.length > 0) {
+    sections.push("\n**Eliminated**");
+    for (const team of eliminatedTeams) {
+      const managerLabel = team.discordUserId
+        ? `<@${team.discordUserId}>`
+        : team.username
+          ? escapeMarkdown(team.username)
+          : undefined;
+      const label = managerLabel
+        ? `${escapeMarkdown(team.participantName)} (${managerLabel})`
+        : escapeMarkdown(team.participantName);
+      sections.push(`• **${label}**`);
+    }
+  }
+
   const isTied = buildTiedRankChecker(standings.map((s) => s.rank));
   const rankLabel = (rank: number) => (isTied(rank) ? `T${rank}` : `${rank}`);
 
@@ -195,6 +221,9 @@ export async function sendStandingsUpdateNotification({
     if (m.winnerDiscordUserId) pingUserIds.add(m.winnerDiscordUserId);
     if (m.loserDiscordUserId) pingUserIds.add(m.loserDiscordUserId);
   }
+  for (const t of eliminatedTeams ?? []) {
+    if (t.discordUserId) pingUserIds.add(t.discordUserId);
+  }
   const pingIds = [...pingUserIds];
 
   const payload: DiscordWebhookPayload = {