fix(imessage): normalize leading echoed text corruption

Fixes #59973

CHANGELOG.md

@@ -20,6 +20,7 @@ Docs: https://docs.openclaw.ai
 - Active Memory: register the prompt-build hook with the configured recall timeout plus setup grace instead of the 150s maximum budget, so default memory recall cannot delay turn startup for multiple minutes. Thanks @vincentkoc.
 - CLI/channels logs: reuse the rolling log-file resolver so `openclaw channels logs` falls back to the active dated log across date boundaries without reading unrelated custom log files. Fixes #42875; carries forward #42904 and #43043. Thanks @ethanclaw and @wdskuki.
 - CLI/update: skip tracked plugins disabled in config during post-update plugin sync before npm, ClawHub, or marketplace update checks, preserving their install records without failing the update. Fixes #73880. Thanks @islandpreneur007.
+- iMessage: normalize known leading attributedBody corruption markers on sent-message echo text keys so delayed reflected echoes with U+FFFD/U+FFFE/U+FFFF/FEFF prefixes are dropped without collapsing interior text. Fixes #59973; carries forward #59980 and #62191. Thanks @neeravmakwana and @maguilar631697.
 - Security/audit: recognize dangerous node command IDs as valid `gateway.nodes.denyCommands` entries, so audit only warns on real typos or unsupported patterns. (#56923) Thanks @chziyue.
 - Telegram/exec approvals: stop treating general Telegram chat allowlists and `defaultTo` routes as native exec approvers; Telegram now uses explicit `execApprovals.approvers` or owner identity from `commands.ownerAllowFrom`, matching the first-pairing owner bootstrap path. Thanks @pashpashpash.
 - Chat commands: route sensitive group `/diagnostics` and `/export-trajectory` approvals and results to a private owner route, preferring same-surface DMs before falling back to the first configured owner route, so Discord group invocations can land in Telegram when that is the primary owner interface. Thanks @pashpashpash.

extensions/imessage/src/monitor/echo-cache.ts

@@ -22,12 +22,17 @@ export type SentMessageCache = {
 // duplicate delivery (noisy but not lossy) — never message loss.
 const SENT_MESSAGE_TEXT_TTL_MS = 4_000;
 const SENT_MESSAGE_ID_TTL_MS = 60_000;
+const LEADING_ATTRIBUTED_BODY_CORRUPTION_MARKERS = /^[\uFEFF\uFFFD\uFFFE\uFFFF]+/u;
 
 function normalizeEchoTextKey(text: string | undefined): string | null {
   if (!text) {
     return null;
   }
-  const normalized = text.replace(/\r\n?/g, "\n").trim();
+  const normalized = text
+    .replace(/\r\n?/g, "\n")
+    .trim()
+    .replace(LEADING_ATTRIBUTED_BODY_CORRUPTION_MARKERS, "")
+    .trim();
   return normalized ? normalized : null;
 }
 

extensions/imessage/src/monitor/monitor-provider.echo-cache.test.ts

@@ -17,6 +17,36 @@ describe("iMessage sent-message echo cache", () => {
     expect(cache.has("acct:imessage:+1666", { text: "Reasoning:\n_step_" })).toBe(false);
   });
 
+  it("matches delayed reflected echoes with leading attributedBody corruption markers", () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2026-02-25T00:00:00Z"));
+    const cache = createSentMessageCache();
+
+    cache.remember("acct:imessage:+1555", { text: "Delayed echo reply" });
+
+    expect(
+      cache.has("acct:imessage:+1555", {
+        text: "\uFFFD\uFFFE\uFFFF\uFEFFDelayed echo reply",
+      }),
+    ).toBe(true);
+  });
+
+  it("keeps attributedBody corruption cleanup leading-only", () => {
+    vi.useFakeTimers();
+    vi.setSystemTime(new Date("2026-02-25T00:00:00Z"));
+    const cache = createSentMessageCache();
+
+    cache.remember("acct:imessage:+1555", { text: "Delayed echo reply" });
+
+    expect(
+      cache.has("acct:imessage:+1555", {
+        text: "Delayed \uFFFD echo reply",
+      }),
+    ).toBe(false);
+    expect(cache.has("acct:imessage:+1555", { text: "Delayed\techo reply" })).toBe(false);
+    expect(cache.has("acct:imessage:+1555", { text: "Delayed\necho reply" })).toBe(false);
+  });
+
   it("matches by outbound message id and ignores placeholder ids", () => {
     vi.useFakeTimers();
     vi.setSystemTime(new Date("2026-02-25T00:00:00Z"));