Observer Plugins
Observers watch system activity without affecting behavior. They’re useful for debugging, auditing, and persisting reasoning traces.
Available Observers
| Plugin | ID | Purpose |
|---|---|---|
| Thinking Persistence | nexus.observe.thinking | Persists thinking steps and plan progress |
| OpenTelemetry | nexus.observe.otel | Exports events as OTel traces via OTLP |
The legacy
nexus.observe.loggerplugin was removed in #66 / Phase 3. Itsevents.jsonlrole is now subsumed by the always-on engine journal at<session>/journal/events.jsonl. External tooling that previously tailed the logger’s events.jsonl can tail the journal instead.