Version: 2026.6.1 (2026.5.28 installed, updated today)

Heartbeat still shows malformed exec completion text instead of actual command output.

Steps to reproduce:

1. Create a HEARTBEAT.md that includes an exec step (e.g. tail -5 ~/.openclaw/workspace/memory/2026-06-04.md)
2. Wait for heartbeat to fire

Expected: Heartbeat shows the actual output of the exec command

Actual: Heartbeat shows generic fallback text:
⚠️ 🛠️ show last 20 lines of ~/.openclaw/workspace/memory/2026-06-04.md failed

This matches the exact pattern described in issues #66382 and #66487 (both marked CLOSED). Either this is a regression or the fix was incomplete.

Relevant links:

• Bug: heartbeat exec-event relay prompt drops the actual system-event body and emits generic fallback text #66382 — Bug: heartbeat exec-event relay prompt drops the actual system-event body and emits generic fallback text
• Heartbeat exec-event prompt drops actual completion payload #66487 — Heartbeat exec-event prompt drops actual completion payload
• GHSA-g375-h3v6-4873 — Heartbeat owner downgrade (related security advisory)

Environment:

• Host: ubuntu (Linux 6.8.0-124-generic)
• Node.js: v24.13.1
• OpenClaw: 2026.6.1