diff --git a/apps/api/src/services/awooop_truth_chain_service.py b/apps/api/src/services/awooop_truth_chain_service.py
index 413dce68..53cb947d 100644
--- a/apps/api/src/services/awooop_truth_chain_service.py
+++ b/apps/api/src/services/awooop_truth_chain_service.py
@@ -785,6 +785,8 @@ async def fetch_truth_chain(source_id: str, project_id: str = "awoooi") -> dict[
               AND (
                 run_id::text = :source_id
                 OR content_preview ILIKE :needle
+                OR coalesce(source_envelope #> '{source_refs,incident_ids}', '[]'::jsonb) ? :source_id
+                OR coalesce(source_envelope #> '{source_refs,code_refs}', '[]'::jsonb) ? :source_id
               )
             ORDER BY queued_at DESC
             LIMIT :limit
diff --git a/apps/api/src/services/channel_hub.py b/apps/api/src/services/channel_hub.py
index ff60ea5e..4d61830c 100644
--- a/apps/api/src/services/channel_hub.py
+++ b/apps/api/src/services/channel_hub.py
@@ -514,7 +514,7 @@ async def record_outbound_message(
                 content_hash, content_preview, content_redacted,
                 redaction_version, source_envelope,
                 provider_message_id,
-                send_status, queued_at,
+                send_status, queued_at, sent_at,
                 triggered_by_state, waiting_since
             ) VALUES (
                 :project_id, :run_id, :conversation_event_id,
@@ -523,6 +523,7 @@ async def record_outbound_message(
                 :redaction_version, CAST(:source_envelope AS jsonb),
                 :provider_message_id,
                 :send_status, NOW(),
+                CASE WHEN :send_status = 'sent' THEN NOW() ELSE NULL END,
                 :triggered_by_state, :waiting_since
             )
             RETURNING message_id
diff --git a/apps/api/src/services/telegram_gateway.py b/apps/api/src/services/telegram_gateway.py
index 87546067..f00d3ef1 100644
--- a/apps/api/src/services/telegram_gateway.py
+++ b/apps/api/src/services/telegram_gateway.py
@@ -69,6 +69,7 @@ POLLING_LEADER_WATCH = 30  # seconds - 非 Leader Pod 每 30s 嘗試接管
 logger = structlog.get_logger(__name__)
 _TELEGRAM_BOT_URL_RE = re.compile(r"(api\.telegram\.org/bot)[^/\s]+")
 _INCIDENT_ID_RE = re.compile(r"\bINC-\d{8}-[A-Z0-9]{4,}\b")
+_CODE_REF_RE = re.compile(r"<code>([0-9a-f]{7,12})</code>", re.IGNORECASE)
 
 
 def _top_gateway_bucket(
@@ -213,6 +214,9 @@ def _reply_markup_summary(payload: dict) -> dict[str, object]:
 
 def _outbound_source_envelope(method: str, payload: dict) -> dict[str, object]:
     """Build a redaction-friendly source envelope for Channel Hub replay."""
+    text = str(payload.get("text") or payload.get("caption") or "")
+    incident_ids = sorted(set(_INCIDENT_ID_RE.findall(text)))
+    code_refs = sorted(set(match.group(1) for match in _CODE_REF_RE.finditer(text)))
     return {
         "adapter": "legacy_telegram_gateway",
         "method": method,
@@ -222,6 +226,10 @@ def _outbound_source_envelope(method: str, payload: dict) -> dict[str, object]:
         "disable_web_page_preview": payload.get("disable_web_page_preview"),
         "has_reply_context": _has_reply_context(payload),
         "reply_markup": _reply_markup_summary(payload),
+        "source_refs": {
+            "incident_ids": incident_ids[:20],
+            "code_refs": code_refs[:20],
+        },
     }
 
 # 2026-04-27 Claude Sonnet 4.6: B3 — LLM 動態 Telegram 按鈕 Feature Flag
diff --git a/apps/api/tests/test_channel_hub_grouped_alert_events.py b/apps/api/tests/test_channel_hub_grouped_alert_events.py
index eb22386c..230b3e75 100644
--- a/apps/api/tests/test_channel_hub_grouped_alert_events.py
+++ b/apps/api/tests/test_channel_hub_grouped_alert_events.py
@@ -6,6 +6,7 @@ from src.services.channel_hub import (
     ensure_completed_shadow_run,
     format_grouped_alert_digest_text,
     format_grouped_alert_event_content,
+    record_outbound_message,
 )
 
 
@@ -79,10 +80,14 @@ class _FakeSession:
     def __init__(self) -> None:
         self.statement = ""
         self.params = {}
+        self.statements = []
+        self.param_sets = []
 
     async def execute(self, statement, params):  # noqa: ANN001
         self.statement = str(statement)
         self.params = params
+        self.statements.append(str(statement))
+        self.param_sets.append(params)
         return _FakeResult()
 
 
@@ -105,3 +110,27 @@ async def test_completed_shadow_run_sets_run_state_not_null_defaults() -> None:
     assert "0, 3, 0.0000, 0" in session.statement
     assert session.params["project_id"] == "awoooi"
     assert session.params["run_id"] == run_id
+
+
+async def test_record_outbound_message_sets_sent_at_for_sent_messages() -> None:
+    session = _FakeSession()
+    run_id = build_grouped_alert_run_id("awoooi", "telegram-message-13152")
+
+    await record_outbound_message(
+        session,  # type: ignore[arg-type]
+        project_id="awoooi",
+        run_id=run_id,
+        channel_type="telegram",
+        channel_chat_id="-100123",
+        message_type="approval_request",
+        content="ACTION REQUIRED INC-20260513-9B082D",
+        provider_message_id="13152",
+        send_status="sent",
+        triggered_by_state="legacy_gateway",
+        is_shadow=False,
+    )
+
+    insert_statement = session.statements[-1]
+    assert "sent_at" in insert_statement
+    assert "CASE WHEN :send_status = 'sent' THEN NOW() ELSE NULL END" in insert_statement
+    assert session.param_sets[-1]["send_status"] == "sent"
diff --git a/apps/api/tests/test_telegram_gateway_error_sanitizer.py b/apps/api/tests/test_telegram_gateway_error_sanitizer.py
index 913a0848..5edffa5a 100644
--- a/apps/api/tests/test_telegram_gateway_error_sanitizer.py
+++ b/apps/api/tests/test_telegram_gateway_error_sanitizer.py
@@ -18,7 +18,11 @@ def test_telegram_gateway_sanitizes_bot_token_url() -> None:
 def test_outbound_source_envelope_keeps_replay_context_without_raw_payload() -> None:
     payload = {
         "chat_id": "-100123",
-        "text": "ACTION REQUIRED token 1234567890:abcdefghijklmnopqrstuvwxyzABCDEFGH",
+        "text": (
+            "ACTION REQUIRED INC-20260513-9B082D "
+            "<code>7f858956</code> token "
+            "1234567890:abcdefghijklmnopqrstuvwxyzABCDEFGH"
+        ),
         "parse_mode": "HTML",
         "reply_markup": {
             "inline_keyboard": [
@@ -40,6 +44,8 @@ def test_outbound_source_envelope_keeps_replay_context_without_raw_payload() ->
     assert envelope["reply_markup"]["button_count"] == 2
     assert envelope["reply_markup"]["buttons"][0]["callback_prefix"] == "approve"
     assert envelope["reply_markup"]["buttons"][1]["callback_prefix"] == "details"
+    assert envelope["source_refs"]["incident_ids"] == ["INC-20260513-9B082D"]
+    assert envelope["source_refs"]["code_refs"] == ["7f858956"]
     assert "approval-id-secret" not in str(envelope)
     assert "1234567890:" not in str(envelope)
     assert "ACTION REQUIRED" not in str(envelope)
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index 53c6b323..aceee09d 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -7251,3 +7251,57 @@ scope=write
 - T11 已部署：Operator Run Detail 與 Telegram detail formatter 都已能呈現 MCP Gateway 摘要。
 - 這次沒有發送真實 Telegram 測試訊息，避免洗版；改以 production pod 直接呼叫 detail formatter 驗證。
 - 目前整體進度更新：約 68%。
+
+### 2026-05-13 — AwoooP truth-chain T12a：Telegram outbound 可回放關聯強化（local green）
+
+**production live audit 摘要**：
+
+```text
+24h:
+incidents=150
+approval_records=102
+alert_operation_log=682
+timeline_events=154
+incident_evidence=130
+auto_repair_executions=10
+knowledge_entries=42
+legacy_mcp_audit_log=1265
+awooop_mcp_gateway_audit=1365
+awooop_outbound_message=420
+
+outbound_quality:
+total=420 redacted=226 envelope=420 envelope_schema=226 with_run=420 sent_at=0
+
+incident_join_quality:
+total=150 with_aol=100 with_evidence=102 with_legacy_mcp=102 with_timeline=102 with_approval=102 with_auto_repair=10
+
+Sentry / SignOz durable event tables:
+none found by information_schema table_name ILIKE '%sentry%' OR '%signoz%'
+```
+
+**判讀**：
+
+- MCP / SignOz 能力已有實際使用，且 legacy MCP bridge 已寫入 AwoooP Gateway audit。
+- 仍不能宣稱完整 AI 自動修復：24h incident 150 筆中只有 10 筆有 `auto_repair_executions`。
+- Telegram outbound mirror 有資料，但 `sent_at=0` 是真缺口；source envelope 也缺少 structured source refs，truth-chain 只能靠 `content_preview ILIKE` 猜關聯。
+
+**變更**：
+
+- `record_outbound_message()` 在 `send_status='sent'` 時寫入 `sent_at=NOW()`。
+- Telegram outbound `source_envelope` 新增 `source_refs.incident_ids` 與 `source_refs.code_refs`，保留 redaction-friendly 關聯錨點。
+- truth-chain outbound 查詢支援 structured `source_refs`，不只靠 preview 文字搜尋。
+
+**local verification**：
+
+```text
+DATABASE_URL=postgresql+asyncpg://u:p@localhost:5432/db python -m pytest tests/test_telegram_gateway_error_sanitizer.py tests/test_channel_hub_grouped_alert_events.py tests/test_awooop_truth_chain_service.py tests/test_telegram_adr050.py -q
+51 passed
+
+python -m ruff check --select F821 src/services/channel_hub.py src/services/telegram_gateway.py src/services/awooop_truth_chain_service.py tests/test_telegram_gateway_error_sanitizer.py tests/test_channel_hub_grouped_alert_events.py tests/test_telegram_adr050.py
+All checks passed
+
+python -m py_compile src/services/channel_hub.py src/services/telegram_gateway.py src/services/awooop_truth_chain_service.py tests/test_telegram_gateway_error_sanitizer.py tests/test_channel_hub_grouped_alert_events.py tests/test_telegram_adr050.py
+OK
+```
+
+**目前整體進度**：約 69%。