From c12f693c59ea0605054f10eeb4c291eff08bf799 Mon Sep 17 00:00:00 2001
From: pvtclawn <pvtclawn@proton.me>
Date: Thu, 12 Feb 2026 23:42:57 +0000
Subject: [PATCH] feat: embed actual event text in cron prompt

Combines two complementary fixes for ghost reminder bug:

1. Filter HEARTBEAT_OK/exec messages (previous commit)
2. Embed actual event content in prompt (this commit)

Instead of static 'shown above' message, dynamically build prompt
with actual reminder text. Ensures model sees event content directly.

Credit: Approach inspired by @nyx-rymera's analysis in #13317

Fixes #13317
---
 src/infra/heartbeat-runner.ts | 25 ++++++++++++++++++-------
 1 file changed, 18 insertions(+), 7 deletions(-)

diff --git a/src/infra/heartbeat-runner.ts b/src/infra/heartbeat-runner.ts
index 5cb21e5dc..b15ff03f2 100644
--- a/src/infra/heartbeat-runner.ts
+++ b/src/infra/heartbeat-runner.ts
@@ -96,12 +96,23 @@ const EXEC_EVENT_PROMPT =
   "Please relay the command output to the user in a helpful way. If the command succeeded, share the relevant output. " +
   "If it failed, explain what went wrong.";
 
-// Prompt used when a scheduled cron job has fired and injected a system event.
-// This overrides the standard heartbeat prompt so the model relays the scheduled
-// reminder instead of responding with "HEARTBEAT_OK".
-const CRON_EVENT_PROMPT =
-  "A scheduled reminder has been triggered. The reminder message is shown in the system messages above. " +
-  "Please relay this reminder to the user in a helpful and friendly way.";
+// Build a dynamic prompt for cron events by embedding the actual event content.
+// This ensures the model sees the reminder text directly instead of relying on
+// "shown in the system messages above" which may not be visible in context.
+function buildCronEventPrompt(pendingEvents: string[]): string {
+  const eventText = pendingEvents.join("\n").trim();
+  if (!eventText) {
+    return (
+      "A scheduled cron event was triggered, but no event content was found. " +
+      "Reply HEARTBEAT_OK."
+    );
+  }
+  return (
+    "A scheduled reminder has been triggered. The reminder content is:\n\n" +
+    eventText +
+    "\n\nPlease relay this reminder to the user in a helpful and friendly way."
+  );
+}
 
 type HeartbeatAgentState = {
   agentId: string;
@@ -504,7 +515,7 @@ export async function runHeartbeatOnce(opts: {
   const prompt = hasExecCompletion
     ? EXEC_EVENT_PROMPT
     : hasCronEvents
-      ? CRON_EVENT_PROMPT
+      ? buildCronEventPrompt(pendingEvents)
       : resolveHeartbeatPrompt(cfg, heartbeat);
   const ctx = {
     Body: appendCronStyleCurrentTimeLine(prompt, cfg, startedAt),