# ADR 004: Separate application telemetry from node monitoring

- HTML version: https://robbiepalmer.me/projects/personal-engineering-platform/adrs/004-observability
- Project: Personal Engineering Platform (https://robbiepalmer.me/projects/personal-engineering-platform.md)
- Status: Accepted
- Date: 2026-09-12
- Initiatives: Semi-autonomous Software Development (https://robbiepalmer.me/initiatives/semi-autonomous-software-development.md)

## Context

Application events and host health answer different operational questions.
Many projects need one without the other.

## Decision

Use separate preferred slots. Select PostHog for application telemetry and
Netdata for node monitoring.

## Consequences

A project activates only the kind of telemetry it operates. Adopting the
observability layer alone does not claim both technologies.

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