feat(pagerduty): new PagerDuty alerting integration

Events API v2 + REST API v2, 10 commands: trigger/acknowledge/resolve incident,
list/get incident, add note, list on-calls/users/services. Token + routing-key
auth, stdlib-only.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

integrations/pagerduty/scripts/add_note.py

@@ -0,0 +1,77 @@
+import json, os, sys, uuid, urllib.parse, urllib.request, urllib.error
+
+REST = "https://api.pagerduty.com"
+EVENTS = "https://events.pagerduty.com/v2/enqueue"
+
+
+def _cfg():
+    return json.loads(os.environ.get("INTEGRATION_SECRETS", "{}"))
+
+
+def _inputs():
+    return json.loads(os.environ.get("INTEGRATION_INPUTS", "{}"))
+
+
+def rest(method, path, cfg, body=None, params=None, extra_headers=None):
+    url = REST + path
+    if params:
+        clean = {k: v for k, v in params.items() if v not in (None, "")}
+        if clean:
+            url += "?" + urllib.parse.urlencode(clean, doseq=True)
+    data = json.dumps(body).encode("utf-8") if body is not None else None
+    headers = {
+        "Authorization": "Token token=" + str(cfg.get("api_token", "")),
+        "Accept": "application/vnd.pagerduty+json;version=2",
+    }
+    if data is not None:
+        headers["Content-Type"] = "application/json"
+    if extra_headers:
+        headers.update(extra_headers)
+    req = urllib.request.Request(url, data=data, headers=headers, method=method)
+    with urllib.request.urlopen(req, timeout=60) as r:
+        raw = r.read()
+        return json.loads(raw) if raw else {}
+
+
+def events_enqueue(cfg, payload):
+    data = json.dumps(payload).encode("utf-8")
+    req = urllib.request.Request(EVENTS, data=data, headers={"Content-Type": "application/json"}, method="POST")
+    with urllib.request.urlopen(req, timeout=60) as r:
+        raw = r.read()
+        return json.loads(raw) if raw else {}
+
+
+def _run(fn):
+    try:
+        print(json.dumps(fn(_cfg(), _inputs())))
+    except urllib.error.HTTPError as e:
+        print(json.dumps({"error": "HTTP " + str(e.code), "detail": e.read().decode("utf-8", "replace")}))
+        sys.exit(1)
+    except Exception as e:
+        print(json.dumps({"error": str(e)}))
+        sys.exit(1)
+
+
+def main(cfg, inputs):
+    incident_id = str(inputs.get("incident_id", "") or "").strip()
+    if not incident_id:
+        raise Exception("incident_id is required")
+
+    note = str(inputs.get("note", "") or "").strip()
+    if not note:
+        raise Exception("note is required")
+
+    from_email = str(cfg.get("from_email", "") or "").strip()
+    if not from_email:
+        raise Exception("from_email must be configured to add notes")
+
+    return rest(
+        "POST",
+        "/incidents/" + urllib.parse.quote(incident_id, safe="") + "/notes",
+        cfg,
+        body={"note": {"content": note}},
+        extra_headers={"From": from_email},
+    )
+
+
+_run(main)