Changelog: add Telegram compaction dedupe note

Move recordDeliveredText() from the async post-delivery callback in
emitBlockReplySafely to the synchronous path in emitBlockChunk, before
the Telegram send. This closes the race window where context compaction
could trigger a new assistant turn while the delivery is still in-flight,
bypassing the dedup cache entirely.

Trade-off: if the send fails transiently the text remains in the cache,
but the 1-hour TTL ensures it won't suppress the same content forever.
This matches the synchronous recording already done in pushAssistantText.

Also fixes the hash comment: Math.imul + >>> 0 produce a 32-bit hash,
not 53-bit.

Addresses review feedback from greptile-apps.

CHANGELOG.md

@@ -185,6 +185,7 @@ Docs: https://docs.openclaw.ai
 - TUI/theme: detect light terminal backgrounds via `COLORFGBG` and pick a WCAG AA-compliant light palette, with `OPENCLAW_THEME=light|dark` override for terminals without auto-detection. (#38636) Thanks @ademczuk and @vincentkoc.
 - Agents/openai-codex: normalize `gpt-5.4` fallback transport back to `openai-codex-responses` on `chatgpt.com/backend-api` when config drifts to the generic OpenAI responses endpoint. (#38736) Thanks @0xsline.
 - Models/openai-codex GPT-5.4 forward-compat: use the GPT-5.4 1,050,000-token context window and 128,000 max tokens for `openai-codex/gpt-5.4` instead of inheriting stale legacy Codex limits in resolver fallbacks and model listing. (#37876) thanks @yuweuii.
+- Telegram/compaction replay dedupe: keep cross-turn duplicate suppression for real delivered reply text while avoiding directive-only chunks and non-block compaction retries that could drop or mis-thread replayed Telegram replies. (#39456) Thanks @eveiljuice.
 - Tools/web search: restore Perplexity OpenRouter/Sonar compatibility for legacy `OPENROUTER_API_KEY`, `sk-or-...`, and explicit `perplexity.baseUrl` / `model` setups while keeping direct Perplexity keys on the native Search API path. (#39937) Thanks @obviyus.
 - Agents/failover: detect Amazon Bedrock `Too many tokens per day` quota errors as rate limits across fallback, cron retry, and memory embeddings while keeping context-window `too many tokens per request` errors out of the rate-limit lane. (#39377) Thanks @gambletan.
 - Mattermost replies: keep `root_id` pinned to the existing thread root when an agent replies inside a thread, while still using reply-target threading for top-level posts. (#27744) thanks @hnykda.

src/agents/pi-embedded-helpers.ts

@@ -57,7 +57,10 @@ export {
   isMessagingToolDuplicate,
   isMessagingToolDuplicateNormalized,
   normalizeTextForComparison,
+  isRecentlyDelivered,
+  recordDeliveredText,
 } from "./pi-embedded-helpers/messaging-dedupe.js";
+export type { RecentDeliveredEntry } from "./pi-embedded-helpers/messaging-dedupe.js";
 
 export { pickFallbackThinkingLevel } from "./pi-embedded-helpers/thinking.js";
 

src/agents/pi-embedded-helpers/messaging-dedupe.test.ts

@@ -0,0 +1,110 @@
+import { describe, expect, it } from "vitest";
+import {
+  buildDeliveredTextHash,
+  isRecentlyDelivered,
+  normalizeTextForComparison,
+  recordDeliveredText,
+  type RecentDeliveredEntry,
+} from "./messaging-dedupe.js";
+
+describe("normalizeTextForComparison", () => {
+  it("lowercases and trims", () => {
+    expect(normalizeTextForComparison("  Hello World  ")).toBe("hello world");
+  });
+
+  it("collapses whitespace", () => {
+    expect(normalizeTextForComparison("hello   world")).toBe("hello world");
+  });
+});
+
+describe("cross-turn dedup", () => {
+  describe("buildDeliveredTextHash", () => {
+    it("returns normalized prefix up to 200 chars", () => {
+      const hash = buildDeliveredTextHash("Hello World!");
+      expect(hash).toBe("hello world!");
+    });
+
+    it("includes length and full-text hash for strings over 200 chars", () => {
+      const long = "a".repeat(300);
+      const hash = buildDeliveredTextHash(long);
+      expect(hash).toContain("|300|");
+      expect(hash.startsWith("a".repeat(200))).toBe(true);
+    });
+
+    it("produces different hashes for texts with same prefix but different tails", () => {
+      const base = "x".repeat(200);
+      const textA = base + " ending alpha with more content here";
+      const textB = base + " ending beta with different content";
+      expect(buildDeliveredTextHash(textA)).not.toBe(buildDeliveredTextHash(textB));
+    });
+
+    it("returns empty for very short text", () => {
+      expect(buildDeliveredTextHash("hi")).toBe("hi");
+    });
+  });
+
+  describe("isRecentlyDelivered", () => {
+    it("returns false for empty cache", () => {
+      expect(isRecentlyDelivered("Hello world test message", [])).toBe(false);
+    });
+
+    it("returns true when text was recently recorded", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      recordDeliveredText("Hello world test message", cache, now);
+      expect(isRecentlyDelivered("Hello world test message", cache, now + 1000)).toBe(true);
+    });
+
+    it("returns false after TTL expires", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      recordDeliveredText("Hello world test message", cache, now);
+      // 1 hour + 1ms later
+      expect(isRecentlyDelivered("Hello world test message", cache, now + 3_600_001)).toBe(false);
+    });
+
+    it("returns false for text shorter than MIN_DUPLICATE_TEXT_LENGTH", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      recordDeliveredText("short", cache);
+      expect(isRecentlyDelivered("short", cache)).toBe(false);
+    });
+
+    it("detects duplicates with different whitespace/casing", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      recordDeliveredText("  Hello   World  Test  Message  ", cache, now);
+      expect(isRecentlyDelivered("hello world test message", cache, now)).toBe(true);
+    });
+  });
+
+  describe("recordDeliveredText", () => {
+    it("evicts expired entries on record", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      recordDeliveredText("First message that is long enough", cache, now);
+      // Record second much later (> TTL)
+      recordDeliveredText("Second message that is long enough", cache, now + 3_700_000);
+      // First should be evicted
+      expect(cache.length).toBe(1);
+      expect(cache[0].hash).toContain("second");
+    });
+
+    it("caps at RECENT_DELIVERED_MAX entries", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      for (let i = 0; i < 25; i++) {
+        recordDeliveredText(`Unique message number ${i} with enough length`, cache, now + i);
+      }
+      expect(cache.length).toBe(20);
+    });
+
+    it("updates timestamp for duplicate hash instead of adding", () => {
+      const cache: RecentDeliveredEntry[] = [];
+      const now = Date.now();
+      recordDeliveredText("Same message repeated in session", cache, now);
+      recordDeliveredText("Same message repeated in session", cache, now + 5000);
+      expect(cache.length).toBe(1);
+      expect(cache[0].timestamp).toBe(now + 5000);
+    });
+  });
+});

src/agents/pi-embedded-helpers/messaging-dedupe.ts

@@ -1,5 +1,97 @@
 const MIN_DUPLICATE_TEXT_LENGTH = 10;
 
+/**
+ * Maximum number of recent delivered text hashes to retain for cross-turn
+ * deduplication.  Keeps memory bounded while covering the typical window
+ * where context compaction may cause the model to re-emit a previous reply.
+ */
+const RECENT_DELIVERED_MAX = 20;
+
+/**
+ * TTL for entries in the cross-turn dedup cache (1 hour).
+ * After this period the entry is evicted and the same text can be delivered
+ * again (which is desirable for intentionally repeated content).
+ */
+const RECENT_DELIVERED_TTL_MS = 60 * 60_000;
+
+export type RecentDeliveredEntry = {
+  hash: string;
+  timestamp: number;
+};
+
+/**
+ * Build a collision-resistant hash from the full normalised text of a
+ * delivered assistant message.  Uses a fast non-cryptographic approach:
+ * the first 200 normalised chars (for quick prefix screening) combined
+ * with the total length and a simple 32-bit numeric hash of the full
+ * string.  This avoids false positives when two responses share the same
+ * opening paragraph but diverge later.
+ */
+export function buildDeliveredTextHash(text: string): string {
+  const normalized = normalizeTextForComparison(text);
+  if (normalized.length <= 200) {
+    return normalized;
+  }
+  // 32-bit FNV-1a-inspired hash (Math.imul + >>> 0 operate on 32-bit integers).
+  let h = 0x811c9dc5;
+  for (let i = 0; i < normalized.length; i++) {
+    h ^= normalized.charCodeAt(i);
+    h = Math.imul(h, 0x01000193);
+  }
+  // Combine prefix + length + full-text hash for uniqueness.
+  return `${normalized.slice(0, 200)}|${normalized.length}|${(h >>> 0).toString(36)}`;
+}
+
+/**
+ * Check whether `text` was recently delivered (cross-turn).
+ */
+export function isRecentlyDelivered(
+  text: string,
+  recentDelivered: RecentDeliveredEntry[],
+  now?: number,
+): boolean {
+  const hash = buildDeliveredTextHash(text);
+  if (!hash || hash.length < MIN_DUPLICATE_TEXT_LENGTH) {
+    return false;
+  }
+  const currentTime = now ?? Date.now();
+  return recentDelivered.some(
+    (entry) => currentTime - entry.timestamp < RECENT_DELIVERED_TTL_MS && entry.hash === hash,
+  );
+}
+
+/**
+ * Record a delivered text in the rolling cache.
+ */
+export function recordDeliveredText(
+  text: string,
+  recentDelivered: RecentDeliveredEntry[],
+  now?: number,
+): void {
+  const hash = buildDeliveredTextHash(text);
+  if (!hash || hash.length < MIN_DUPLICATE_TEXT_LENGTH) {
+    return;
+  }
+  const currentTime = now ?? Date.now();
+  // Evict expired entries.
+  for (let i = recentDelivered.length - 1; i >= 0; i--) {
+    if (currentTime - recentDelivered[i].timestamp >= RECENT_DELIVERED_TTL_MS) {
+      recentDelivered.splice(i, 1);
+    }
+  }
+  // Avoid duplicate entries for the same hash.
+  const existing = recentDelivered.findIndex((e) => e.hash === hash);
+  if (existing >= 0) {
+    recentDelivered[existing].timestamp = currentTime;
+    return;
+  }
+  recentDelivered.push({ hash, timestamp: currentTime });
+  // Trim oldest if over capacity.
+  while (recentDelivered.length > RECENT_DELIVERED_MAX) {
+    recentDelivered.shift();
+  }
+}
+
 /**
  * Normalize text for duplicate comparison.
  * - Trims whitespace

src/agents/pi-embedded-subscribe.handlers.types.ts

@@ -4,6 +4,7 @@ import type { ReasoningLevel } from "../auto-reply/thinking.js";
 import type { InlineCodeState } from "../markdown/code-spans.js";
 import type { HookRunner } from "../plugins/hooks.js";
 import type { EmbeddedBlockChunker } from "./pi-embedded-block-chunker.js";
+import type { RecentDeliveredEntry } from "./pi-embedded-helpers/messaging-dedupe.js";
 import type { MessagingToolSend } from "./pi-embedded-messaging.js";
 import type {
   BlockReplyChunking,
@@ -68,6 +69,7 @@ export type EmbeddedPiSubscribeState = {
   compactionRetryPromise: Promise<void> | null;
   unsubscribed: boolean;
 
+  recentDeliveredTexts: RecentDeliveredEntry[];
   messagingToolSentTexts: string[];
   messagingToolSentTextsNormalized: string[];
   messagingToolSentTargets: MessagingToolSend[];

src/agents/pi-embedded-subscribe.reply-tags.test.ts

@@ -27,7 +27,7 @@ describe("subscribeEmbeddedPiSession reply tags", () => {
     return { emit, onBlockReply };
   }
 
-  it("carries reply_to_current across tag-only block chunks", () => {
+  it("carries reply_to_current across tag-only block chunks", async () => {
     const { emit, onBlockReply } = createBlockReplyHarness();
 
     emit({ type: "message_start", message: { role: "assistant" } });
@@ -39,6 +39,7 @@ describe("subscribeEmbeddedPiSession reply tags", () => {
       content: [{ type: "text", text: "[[reply_to_current]]\nHello" }],
     } as AssistantMessage;
     emit({ type: "message_end", message: assistantMessage });
+    await Promise.resolve();
 
     expect(onBlockReply).toHaveBeenCalledTimes(1);
     const payload = onBlockReply.mock.calls[0]?.[0];
@@ -47,7 +48,7 @@ describe("subscribeEmbeddedPiSession reply tags", () => {
     expect(payload?.replyToTag).toBe(true);
   });
 
-  it("flushes trailing directive tails on stream end", () => {
+  it("flushes trailing directive tails on stream end", async () => {
     const { emit, onBlockReply } = createBlockReplyHarness();
 
     emit({ type: "message_start", message: { role: "assistant" } });
@@ -59,6 +60,7 @@ describe("subscribeEmbeddedPiSession reply tags", () => {
       content: [{ type: "text", text: "Hello [[" }],
     } as AssistantMessage;
     emit({ type: "message_end", message: assistantMessage });
+    await Promise.resolve();
 
     expect(onBlockReply).toHaveBeenCalledTimes(2);
     expect(onBlockReply.mock.calls[0]?.[0]?.text).toBe("Hello");
@@ -88,4 +90,43 @@ describe("subscribeEmbeddedPiSession reply tags", () => {
       expect(call[0]?.text?.includes("[[reply_to")).toBe(false);
     }
   });
+
+  it("rebuilds reply_to_current after a compaction retry replays a directive chunk", async () => {
+    const { session, emit } = createStubSessionHarness();
+    const onBlockReply = vi.fn();
+
+    subscribeEmbeddedPiSession({
+      session,
+      runId: "run",
+      onBlockReply,
+      blockReplyBreak: "text_end",
+      blockReplyChunking: {
+        minChars: 1,
+        maxChars: 50,
+        breakPreference: "newline",
+      },
+    });
+
+    emit({ type: "message_start", message: { role: "assistant" } });
+    emitAssistantTextDelta({ emit, delta: "[[reply_to_current]]" });
+    emit({ type: "auto_compaction_end", willRetry: true });
+
+    emit({ type: "message_start", message: { role: "assistant" } });
+    emitAssistantTextDelta({ emit, delta: "[[reply_to_current]]\nHello again" });
+    emitAssistantTextEnd({ emit });
+    emit({
+      type: "message_end",
+      message: {
+        role: "assistant",
+        content: [{ type: "text", text: "[[reply_to_current]]\nHello again" }],
+      } as AssistantMessage,
+    });
+    await Promise.resolve();
+
+    expect(onBlockReply).toHaveBeenCalledTimes(1);
+    const payload = onBlockReply.mock.calls[0]?.[0];
+    expect(payload?.text).toBe("Hello again");
+    expect(payload?.replyToCurrent).toBe(true);
+    expect(payload?.replyToTag).toBe(true);
+  });
 });

src/agents/pi-embedded-subscribe.subscribe-embedded-pi-session.splits-long-single-line-fenced-blocks-reopen.test.ts

@@ -11,7 +11,7 @@ import { makeZeroUsageSnapshot } from "./usage.js";
 type SessionEventHandler = (evt: unknown) => void;
 
 describe("subscribeEmbeddedPiSession", () => {
-  it("splits long single-line fenced blocks with reopen/close", () => {
+  it("splits long single-line fenced blocks with reopen/close", async () => {
     const onBlockReply = vi.fn();
     const { emit } = createParagraphChunkedBlockReplyHarness({
       onBlockReply,
@@ -23,6 +23,7 @@ describe("subscribeEmbeddedPiSession", () => {
 
     const text = `\`\`\`json\n${"x".repeat(120)}\n\`\`\``;
     emitAssistantTextDeltaAndEnd({ emit, text });
+    await Promise.resolve();
     expectFencedChunks(onBlockReply.mock.calls, "```json");
   });
   it("waits for auto-compaction retry and clears buffered text", async () => {
@@ -152,4 +153,32 @@ describe("subscribeEmbeddedPiSession", () => {
     const usage = (session.messages?.[0] as { usage?: unknown } | undefined)?.usage;
     expect(usage).toEqual(makeZeroUsageSnapshot());
   });
+
+  it("does not cache non-block assistant text across a willRetry compaction reset", () => {
+    const listeners: SessionEventHandler[] = [];
+    const session = {
+      subscribe: (listener: SessionEventHandler) => {
+        listeners.push(listener);
+        return () => {};
+      },
+    } as unknown as Parameters<typeof subscribeEmbeddedPiSession>[0]["session"];
+
+    const subscription = subscribeEmbeddedPiSession({
+      session,
+      runId: "run-4",
+    });
+
+    const assistantMessage = {
+      role: "assistant",
+      content: [{ type: "text", text: "Repeated completion text" }],
+    } as AssistantMessage;
+
+    for (const listener of listeners) {
+      listener({ type: "message_end", message: assistantMessage });
+      listener({ type: "auto_compaction_end", willRetry: true });
+      listener({ type: "message_end", message: assistantMessage });
+    }
+
+    expect(subscription.assistantTexts).toEqual(["Repeated completion text"]);
+  });
 });

src/agents/pi-embedded-subscribe.ts

@@ -9,8 +9,11 @@ import { buildCodeSpanIndex, createInlineCodeState } from "../markdown/code-span
 import { EmbeddedBlockChunker } from "./pi-embedded-block-chunker.js";
 import {
   isMessagingToolDuplicateNormalized,
+  isRecentlyDelivered,
   normalizeTextForComparison,
+  recordDeliveredText,
 } from "./pi-embedded-helpers.js";
+import type { RecentDeliveredEntry } from "./pi-embedded-helpers.js";
 import { createEmbeddedPiSessionEventHandler } from "./pi-embedded-subscribe.handlers.js";
 import type {
   EmbeddedPiSubscribeContext,
@@ -70,6 +73,7 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
     compactionRetryReject: undefined,
     compactionRetryPromise: null,
     unsubscribed: false,
+    recentDeliveredTexts: [] as RecentDeliveredEntry[],
     messagingToolSentTexts: [],
     messagingToolSentTextsNormalized: [],
     messagingToolSentTargets: [],
@@ -149,9 +153,8 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
   };
 
   const shouldSkipAssistantText = (text: string) => {
-    if (state.lastAssistantTextMessageIndex !== state.assistantMessageIndex) {
-      return false;
-    }
+    // Same-turn dedup (existing behaviour).
+    if (state.lastAssistantTextMessageIndex === state.assistantMessageIndex) {
       const trimmed = text.trimEnd();
       if (trimmed && trimmed === state.lastAssistantTextTrimmed) {
         return true;
@@ -160,6 +163,13 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
       if (normalized.length > 0 && normalized === state.lastAssistantTextNormalized) {
         return true;
       }
+    }
+    // Cross-turn dedup: catch duplicates caused by context compaction replaying
+    // the same assistant text in a new turn.  Uses a rolling hash cache with a
+    // 1-hour TTL so intentionally repeated content still goes through eventually.
+    if (isRecentlyDelivered(text, state.recentDeliveredTexts)) {
+      return true;
+    }
     return false;
   };
 
@@ -172,6 +182,12 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
     }
     assistantTexts.push(text);
     rememberAssistantText(text);
+    // Non-block assistant text may still be replayed after willRetry compaction
+    // before any channel delivery has happened, so only block-reply paths record
+    // cross-turn dedup state eagerly.
+    if (params.onBlockReply) {
+      recordDeliveredText(text, state.recentDeliveredTexts);
+    }
   };
 
   const finalizeAssistantTexts = (args: {
@@ -191,6 +207,9 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
           text,
         );
         rememberAssistantText(text);
+        if (params.onBlockReply) {
+          recordDeliveredText(text, state.recentDeliveredTexts);
+        }
       } else {
         pushAssistantText(text);
       }
@@ -501,10 +520,10 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
       return;
     }
 
+    if (!params.onBlockReply) {
       state.lastBlockReplyText = chunk;
       assistantTexts.push(chunk);
       rememberAssistantText(chunk);
-    if (!params.onBlockReply) {
       return;
     }
     const splitResult = replyDirectiveAccumulator.consume(chunk);
@@ -523,6 +542,15 @@ export function subscribeEmbeddedPiSession(params: SubscribeEmbeddedPiSessionPar
     if (!cleanedText && (!mediaUrls || mediaUrls.length === 0) && !audioAsVoice) {
       return;
     }
+    if (cleanedText) {
+      state.lastBlockReplyText = cleanedText;
+      assistantTexts.push(cleanedText);
+      rememberAssistantText(cleanedText);
+      // Record in cross-turn dedup cache synchronously before async delivery
+      // so compaction-started follow-up turns see already-emitted text, but
+      // only after reply directives have produced a real outbound payload.
+      recordDeliveredText(cleanedText, state.recentDeliveredTexts);
+    }
     emitBlockReplySafely({
       text: cleanedText,
       mediaUrls: mediaUrls?.length ? mediaUrls : undefined,