---
id: 7635
title: 'Refactor: Enhance Memory Core HealthService for Robustness and Diagnostics'
state: CLOSED
labels:
  - enhancement
  - ai
  - refactoring
assignees: []
createdAt: '2025-10-24T11:58:21Z'
updatedAt: '2025-10-24T12:11:54Z'
githubUrl: 'https://github.com/neomjs/neo/issues/7635'
author: tobiu
commentsCount: 0
parentIssue: null
subIssues: []
subIssuesCompleted: 0
subIssuesTotal: 0
blockedBy: []
blocking: []
closedAt: '2025-10-24T12:11:54Z'
---
# Refactor: Enhance Memory Core HealthService for Robustness and Diagnostics

The `HealthService` within the Memory Core has been significantly refactored to improve robustness, diagnostics, and overall user experience.

### Key Improvements:

1.  **Intelligent Caching**: Implemented a 5-minute caching layer for health checks. Only 'healthy' statuses are cached, allowing for immediate detection of recovery when a user resolves an issue (e.g., starts the ChromaDB). This reduces unnecessary load on the database.
2.  **Granular Status Levels**: The service now reports three distinct statuses:
    *   `healthy`: All systems are operational.
    *   `degraded`: The core database is running, but optional features (like summarization, which requires a `GEMINI_API_KEY`) are unavailable.
    *   `unhealthy`: Critical dependencies like the ChromaDB are down or collections are missing.
3.  **State Transition Logging**: The service now logs clear, user-friendly messages when its state changes (e.g., from `unhealthy` to `healthy`), providing immediate feedback that a user's corrective actions were successful.
4.  **Gatekeeper Function**: A new `ensureHealthy()` method has been added, which acts as a guard in other tool handlers. It prevents operations from executing if the system is not in a `healthy` state, providing clear, actionable error messages to the agent.
5.  **Improved Diagnostics**: The health check response now includes a `details` array with human-readable messages and a `features` object indicating the status of optional functionalities.

These changes make the Memory Core more resilient and easier to debug for developers and AI agents interacting with it. The corresponding `openapi.yaml` has also been updated to reflect the new, more detailed health check response schema.

## Timeline

- 2025-10-24T11:58:22Z @tobiu added the `enhancement` label
- 2025-10-24T11:58:22Z @tobiu added the `ai` label
- 2025-10-24T11:58:22Z @tobiu added the `refactoring` label
- 2025-10-24T12:10:02Z @tobiu referenced in commit `46730c4` - "Refactor: Enhance Memory Core HealthService for Robustness and Diagnostics #7635"
- 2025-10-24T12:11:54Z @tobiu closed this issue

