refactor: simplify cursor session reporting

replaces contributions from udirom

src/integration/assets/cursor/herdr-agent-state.sh

@@ -1,92 +1,59 @@
 #!/bin/sh
-# installed by herdr
-# managed by herdr; reinstalling or updating the integration overwrites this file.
-# add custom hooks beside this file instead of editing it.
+# managed by herdr; reinstalling the integration replaces this file.
 # HERDR_INTEGRATION_ID=cursor
 # HERDR_INTEGRATION_VERSION=1
 
-set -eu
-
-action="${1:-}"
-hook_input_file="$(mktemp "${TMPDIR:-/tmp}/herdr-cursor-hook.XXXXXX")" || exit 0
-trap 'rm -f "$hook_input_file"' EXIT HUP INT TERM
-cat >"$hook_input_file" 2>/dev/null || true
-
-case "$action" in
-  session) ;;
-  *) exit 0 ;;
-esac
-
+[ "${1:-}" = "session" ] || exit 0
 [ "${HERDR_ENV:-}" = "1" ] || exit 0
 [ -n "${HERDR_SOCKET_PATH:-}" ] || exit 0
 [ -n "${HERDR_PANE_ID:-}" ] || exit 0
 command -v python3 >/dev/null 2>&1 || exit 0
 
-HERDR_ACTION="$action" HERDR_HOOK_INPUT_FILE="$hook_input_file" python3 - <<'PY'
+python3 -c '
 import json
 import os
-import random
 import socket
+import sys
 import time
 
-source = "herdr:cursor"
-pane_id = os.environ.get("HERDR_PANE_ID")
-socket_path = os.environ.get("HERDR_SOCKET_PATH")
-hook_input_file = os.environ.get("HERDR_HOOK_INPUT_FILE")
-
-if not pane_id or not socket_path:
+try:
+    payload = json.load(sys.stdin)
+except Exception:
     raise SystemExit(0)
 
-hook_input = {}
-if hook_input_file:
-    try:
-        with open(hook_input_file, encoding="utf-8") as handle:
-            content = handle.read()
-        if content.strip():
-            hook_input = json.loads(content)
-    except Exception:
-        hook_input = {}
-
-def first_text(*keys):
-    for key in keys:
-        value = hook_input.get(key)
+def first_text(*names):
+    for name in names:
+        value = payload.get(name)
         if isinstance(value, str) and value:
             return value
     return None
 
-hook_event_name = first_text("hook_event_name", "hookEventName")
-if hook_event_name not in (None, "sessionStart"):
+event = first_text("hook_event_name", "hookEventName")
+if event not in (None, "sessionStart"):
     raise SystemExit(0)
 
-request_id = f"{source}:{int(time.time() * 1000)}:{random.randrange(1_000_000):06d}"
-report_seq = time.time_ns()
 session_id = first_text("session_id", "sessionId", "conversation_id", "conversationId")
-agent_session_id = session_id if isinstance(session_id, str) and session_id else None
-if agent_session_id:
-    request = {
-        "id": request_id,
-        "method": "pane.report_agent_session",
-        "params": {
-            "pane_id": pane_id,
-            "source": source,
-            "agent": "cursor",
-            "seq": report_seq,
-            "agent_session_id": agent_session_id,
-        },
-    }
-else:
+if session_id is None:
     raise SystemExit(0)
 
+seq = time.time_ns()
+request = json.dumps({
+    "id": f"herdr:cursor:{seq}",
+    "method": "pane.report_agent_session",
+    "params": {
+        "pane_id": os.environ["HERDR_PANE_ID"],
+        "source": "herdr:cursor",
+        "agent": "cursor",
+        "seq": seq,
+        "agent_session_id": session_id,
+    },
+})
 try:
-    client = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
-    client.settimeout(0.5)
-    client.connect(socket_path)
-    client.sendall((json.dumps(request) + "\n").encode())
-    try:
+    with socket.socket(socket.AF_UNIX, socket.SOCK_STREAM) as client:
+        client.settimeout(0.5)
+        client.connect(os.environ["HERDR_SOCKET_PATH"])
+        client.sendall((request + "\n").encode())
         client.recv(4096)
-    except Exception:
-        pass
-    client.close()
 except Exception:
     pass
-PY
+' 2>/dev/null || true