fusion

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gsxdsm 959a7877c8 FN-8020: harden agent heartbeat health classification

Validate the four-interval heartbeat grace window and classify invalid persisted heartbeats safely.

- Cover reported field heartbeat ages in dashboard and engine health checks.
- Mark unparseable heartbeat timestamps as unresponsive and clamp future timestamps to fresh.
- Align dashboard health documentation with the existing four-interval grace window.

Files changed:
 .../app/utils/__tests__/agentHealth.test.tsx       | 48 +++++++++++++++++++++-
 packages/dashboard/app/utils/agentHealth.tsx       | 26 ++++++++++--
 .../src/__tests__/heartbeat-executor.test.ts       | 31 ++++++++++++++
 3 files changed, 100 insertions(+), 5 deletions(-)

Fusion-Task-Id: FN-8020

Fusion-Task-Lineage: 2bc0df78-d68c-489b-8bfb-9b09da10cdfa

Co-authored-by: Fusion (runfusion.ai) <noreply@runfusion.ai>

2026-07-15 22:11:26 -07:00