From 9d9f6905c6db200757091a614f951f000c2dfabf Mon Sep 17 00:00:00 2001
From: Mohamed Boudra <boudra.moha@gmail.com>
Date: Mon, 8 Jun 2026 15:55:22 +0700
Subject: [PATCH] Hide OpenCode compact summaries from chat

---
 .../server/agent/providers/opencode-agent.ts  |   8 ++
 ...encode-compact-event-dump.real.e2e.test.ts | 122 ++++++++++++++++++
 2 files changed, 130 insertions(+)
 create mode 100644 packages/server/src/server/agent/providers/opencode-compact-event-dump.real.e2e.test.ts

diff --git a/packages/server/src/server/agent/providers/opencode-agent.ts b/packages/server/src/server/agent/providers/opencode-agent.ts
index c5e440a51..c7568d450 100644
--- a/packages/server/src/server/agent/providers/opencode-agent.ts
+++ b/packages/server/src/server/agent/providers/opencode-agent.ts
@@ -2510,6 +2510,10 @@ function appendOpenCodeMessagePartDelta(
   const knownPartType = partID ? state.partTypes.get(partID) : undefined;
   const isReasoning = knownPartType === "reasoning" || field === "reasoning";
 
+  if (messageID && state.compactionSummaryMessageIds.has(messageID)) {
+    return;
+  }
+
   if (isReasoning) {
     if (partID) {
       state.streamedPartKeys.add(`reasoning:${partID}`);
@@ -2527,6 +2531,10 @@ function appendOpenCodeMessagePartDelta(
   if (messageRole === "user") {
     return;
   }
+  if (messageID && state.suppressAssistantMessagesUntilIdle?.active === true) {
+    state.compactionSummaryMessageIds.add(messageID);
+    return;
+  }
   if (partID) {
     state.streamedPartKeys.add(`text:${partID}`);
   }
diff --git a/packages/server/src/server/agent/providers/opencode-compact-event-dump.real.e2e.test.ts b/packages/server/src/server/agent/providers/opencode-compact-event-dump.real.e2e.test.ts
new file mode 100644
index 000000000..b4c2122d0
--- /dev/null
+++ b/packages/server/src/server/agent/providers/opencode-compact-event-dump.real.e2e.test.ts
@@ -0,0 +1,122 @@
+import { afterAll, beforeAll, beforeEach, describe, expect, test } from "vitest";
+import { mkdtempSync, rmSync } from "node:fs";
+import { tmpdir } from "node:os";
+import path from "node:path";
+import pino from "pino";
+
+import type { AgentStreamEvent } from "../agent-sdk-types.js";
+import {
+  canRunRealProvider,
+  createRealProviderClient,
+  getRealProviderConfig,
+} from "../../daemon-e2e/real-provider-test-config.js";
+import { OpenCodeServerManager } from "./opencode/server-manager.js";
+
+const OPENCODE_REAL_TEST_MODEL = getRealProviderConfig("opencode").model;
+const logger = pino({ level: "silent" });
+
+function tmpCwd(): string {
+  return mkdtempSync(path.join(tmpdir(), "opencode-compact-dump-"));
+}
+
+function waitForTurnToFinish(session: {
+  subscribe: (callback: (event: AgentStreamEvent) => void) => () => void;
+}): Promise<void> {
+  return new Promise((resolve, reject) => {
+    let unsubscribe: () => void = () => undefined;
+    const timeout = setTimeout(() => {
+      unsubscribe();
+      reject(new Error("Timed out waiting for OpenCode compact turn to finish"));
+    }, 60_000);
+    unsubscribe = session.subscribe((event) => {
+      if (
+        event.type !== "turn_completed" &&
+        event.type !== "turn_failed" &&
+        event.type !== "turn_canceled"
+      ) {
+        return;
+      }
+      clearTimeout(timeout);
+      unsubscribe();
+      if (event.type === "turn_failed") {
+        reject(new Error(event.error));
+        return;
+      }
+      resolve();
+    });
+  });
+}
+
+function dumpCompactEvents(events: AgentStreamEvent[]): void {
+  console.info(
+    "OPENCODE_COMPACT_EVENT_DUMP",
+    JSON.stringify(
+      events.map((event) => ({
+        type: event.type,
+        turnId: "turnId" in event ? event.turnId : undefined,
+        item: event.type === "timeline" ? event.item : undefined,
+        usage: event.type === "turn_completed" ? event.usage : undefined,
+      })),
+      null,
+      2,
+    ),
+  );
+}
+
+describe("OpenCode compact event dump (real)", () => {
+  let canRun = false;
+
+  beforeAll(async () => {
+    canRun = await canRunRealProvider("opencode");
+  });
+
+  beforeEach((context) => {
+    if (!canRun) {
+      context.skip();
+    }
+  });
+
+  afterAll(async () => {
+    await OpenCodeServerManager.getInstance(logger).shutdown();
+  });
+
+  test("dumps live events emitted by a real /compact turn", async () => {
+    const cwd = tmpCwd();
+    const client = createRealProviderClient("opencode", logger);
+
+    try {
+      const session = await client.createSession({
+        provider: "opencode",
+        cwd,
+        model: OPENCODE_REAL_TEST_MODEL,
+        modeId: "build",
+      });
+
+      await session.run("Reply with exactly: COMPACT_SEED_OK");
+
+      const compactEvents: AgentStreamEvent[] = [];
+      const unsubscribe = session.subscribe((event) => {
+        compactEvents.push(event);
+      });
+      const compactFinished = waitForTurnToFinish(session);
+
+      try {
+        await session.startTurn("/compact");
+        await compactFinished;
+      } finally {
+        unsubscribe();
+      }
+
+      dumpCompactEvents(compactEvents);
+
+      expect(compactEvents.some((event) => event.type === "turn_completed")).toBe(true);
+      expect(
+        compactEvents.filter(
+          (event) => event.type === "timeline" && event.item.type === "assistant_message",
+        ),
+      ).toEqual([]);
+    } finally {
+      rmSync(cwd, { recursive: true, force: true });
+    }
+  }, 120_000);
+});