feat(cvm-server): heartbeat re-announce, wire LOG_LEVEL, fix from_date

- Heartbeat: re-publish discovery announcements every CVM_HEARTBEAT_MS (15 min)
  via the SDK's announcement manager (defensively reached), so recency-based
  health checks stay green for a long-running process.
- LOG_LEVEL is now actually passed to the transport (was documented but unused).
- find_events: from_date was a no-op (filter(() => true)); now filters by the
  kind-31923 start tag.
- .env.example: fix CVM_RELAY (.org), drop the dead wotr relay, document
  CVM_HEARTBEAT_MS.

cvm-server/.env.example

@@ -7,11 +7,15 @@
 # NEVER commit this to git!
 CVM_SERVER_NSEC_HEX=your_64_char_hex_private_key_here
 
-# Nostr relays to query for skate data
-NOSTR_RELAYS=wss://goskatespots.nostr1.com,wss://relay.ditto.pub,wss://wotr.relatr.xyz
+# Nostr relays to query for skate data (comma-separated)
+NOSTR_RELAYS=wss://goskatespots.nostr1.com,wss://relay.ditto.pub
 
 # CVM discovery relay — where agents find your server
-CVM_RELAY=wss://relay.contextvm.net
+CVM_RELAY=wss://relay.contextvm.org
 
-# Log level: info | debug | warn | error
+# Log level passed to the ContextVM transport: debug | info | warn | error | silent
 LOG_LEVEL=info
+
+# How often to re-publish the discovery announcements, in ms (0 disables).
+# Keeps recency-based health checks green between (re)starts.
+CVM_HEARTBEAT_MS=900000

cvm-server/server.ts

@@ -44,6 +44,16 @@ const NOSTR_RELAYS = (process.env.NOSTR_RELAYS || "wss://goskatespots.nostr1.com
 
 const CVM_RELAY = process.env.CVM_RELAY || "wss://relay.contextvm.org";
 
+// Transport log level. Previously documented but never consumed (always the
+// SDK default); now actually wired through to the transport.
+type SdkLogLevel = "debug" | "info" | "warn" | "error" | "silent";
+const LOG_LEVEL = (process.env.LOG_LEVEL || "info") as SdkLogLevel;
+
+// How often to re-publish the server's discovery announcements. The SDK only
+// announces on start(), so without this a long-running server looks "stale" to
+// recency-based health checks. Set 0 to disable.
+const HEARTBEAT_MS = Number(process.env.CVM_HEARTBEAT_MS || 15 * 60 * 1000);
+
 // ─── Nostr data pool ─────────────────────────────────────────────────────────
 // Used to query skate data from the community relays
 
@@ -303,11 +313,13 @@ mcpServer.registerTool(
 
     if (from_date) {
       const fromTs = Math.floor(new Date(from_date).getTime() / 1000);
-      events = events.filter(() => {
-        // start tag is unix timestamp for kind 31923
-        return true; // already filtered by since: now above
-      });
-      void fromTs;
+      if (Number.isFinite(fromTs)) {
+        // kind 31923 stores its start as a unix timestamp in the `start` tag.
+        events = events.filter((e) => {
+          const start = parseInt(getTag(e, "start") ?? "0");
+          return !start || start >= fromTs;
+        });
+      }
     }
 
     if (to_date) {
@@ -606,6 +618,7 @@ async function main() {
     signer,
     relayHandler: cvmRelayPool,
     isAnnouncedServer: true,
+    logLevel: LOG_LEVEL,
     serverInfo: {
       name: "SkateSpots Data Server",
       about:
@@ -617,6 +630,30 @@ async function main() {
 
   await mcpServer.connect(transport);
 
+  // ─── Heartbeat ─────────────────────────────────────────────────────────────
+  // Re-publish the server announcements periodically so recency-based health
+  // checks stay green for a long-running process. The announcement manager is a
+  // typed-private SDK member, so we reach it defensively: if a future SDK
+  // renames it we log and skip (health checks then fall back to restart-cadence
+  // freshness) instead of crashing the server.
+  const announcementManager = (
+    transport as unknown as {
+      announcementManager?: { publishPublicAnnouncements?: () => Promise<void> };
+    }
+  ).announcementManager;
+
+  if (HEARTBEAT_MS > 0 && typeof announcementManager?.publishPublicAnnouncements === "function") {
+    const heartbeat = setInterval(() => {
+      announcementManager.publishPublicAnnouncements!().catch((e) =>
+        console.error("[heartbeat] re-announce failed:", e)
+      );
+    }, HEARTBEAT_MS);
+    (heartbeat as { unref?: () => void }).unref?.();
+    console.log(`  Heartbeat   : every ${Math.round(HEARTBEAT_MS / 60000)} min`);
+  } else if (HEARTBEAT_MS > 0) {
+    console.warn("  ⚠️  Heartbeat unavailable — SDK internals changed; health checks may show stale.");
+  }
+
   console.log("━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━");
   console.log("  ✅  Server running — listening for agents on Nostr");
   console.log("");