fix(gh-monitor): use >= cursor + seen_ids dedup to avoid missing same-second events

tools/gh-monitor/poll.py

@@ -91,6 +91,7 @@ def _normalize(event_type: str, items: list[dict]) -> list[dict]:
         # review state maps to a human-readable action
         action = item.get("state", "").lower() if event_type == "review_submitted" else event_type
         events.append({
+            "id": item.get("id"),
             "event_type": event_type,
             "action": action or event_type,
             "created_at": created_at,
@@ -120,8 +121,11 @@ def get_issue_comments(owner: str, repo: str, pr_number: int) -> list[dict]:
 # STEP 6 — event diffing
 # ---------------------------------------------------------------------------
 
-def new_events_since(events: list[dict], cursor_ts: str) -> list[dict]:
-    filtered = [e for e in events if e["created_at"] > cursor_ts]
+def new_events_since(events: list[dict], cursor_ts: str, seen_ids: set) -> list[dict]:
+    filtered = [
+        e for e in events
+        if e["created_at"] >= cursor_ts and e.get("id") not in seen_ids
+    ]
     return sorted(filtered, key=lambda e: e["created_at"])
 
 
@@ -187,6 +191,7 @@ def poll_repo(repo_cfg: dict, state: dict) -> dict:
     repo_state = state.setdefault(repo_slug, {})
     now_ts = datetime.now(timezone.utc).isoformat()
     cursor = repo_state.get("cursor", now_ts)
+    seen_ids: set = set(repo_state.get("seen_ids", []))
 
     # First run: cursor = now (no backfill)
     if "cursor" not in repo_state:
@@ -216,7 +221,7 @@ def poll_repo(repo_cfg: dict, state: dict) -> dict:
         for fetcher in fetchers:
             try:
                 events = fetcher(owner, repo, pr_number)
-                new = new_events_since(events, cursor)
+                new = new_events_since(events, cursor, seen_ids)
                 for event in new:
                     all_new_events.append((pr, event))
             except GHAPIError as e:
@@ -230,12 +235,13 @@ def poll_repo(repo_cfg: dict, state: dict) -> dict:
             closed_data = gh_api(f"/repos/{owner}/{repo}/pulls?state=closed")
             for pr_raw in closed_data:
                 closed_at = pr_raw.get("closed_at") or ""
-                if closed_at > cursor:
+                if closed_at >= cursor and pr_raw.get("id") not in seen_ids:
                     pr = {"number": pr_raw["number"], "title": pr_raw["title"], "html_url": pr_raw["html_url"]}
                     actor = (pr_raw.get("user") or {}).get("login", "unknown")
                     merged = pr_raw.get("merged_at") is not None
                     action = "merged" if merged else "closed"
                     event = {
+                        "id": pr_raw.get("id"),
                         "event_type": "pr_closed",
                         "action": action,
                         "created_at": closed_at,
@@ -256,13 +262,18 @@ def poll_repo(repo_cfg: dict, state: dict) -> dict:
         text = format_notification(repo_slug, pr, event)
         notify(text)
         log.info("[%s] Notified: PR #%d %s by %s", repo_slug, pr["number"], event["action"], event["actor"])
+        if event.get("id"):
+            seen_ids.add(event["id"])
 
-    # Update cursor
+    # Update cursor and seen_ids
     if all_new_events:
         repo_state["cursor"] = max(e["created_at"] for _, e in all_new_events)
     else:
         repo_state["cursor"] = now_ts
 
+    # Keep seen_ids bounded — only retain IDs from events at or after the cursor
+    repo_state["seen_ids"] = list(seen_ids)
+
     reset_errors(repo_slug, state)
     return state