RAHN v0.4.0-alpha — Observability

[MHAlikhani]

RAHN v0.4.0-alpha

Stage 4 introduces the initial observability foundation for RAHN.

Highlights

• Added the deterministic Observation model (ADR 0013).
• Added typed observation values:
  • Counter
  • Gauge
  • Event
• Added deterministic (time_ns, seq) ordering.
• Added an append-only, versioned observation log.
• Added state-linked observation provenance.
• Added strict malformed-input rejection.
• Added rahn observe and rahn observations.
• Added reproducible observation-ingestion benchmarks.

Research

Initial single-machine measurements cover observation ingestion, reading,
serialization size, and ordering behavior.

The observed per-append cost is currently dominated by opening, writing, and
flushing the log. This is recorded as known performance debt rather than
prematurely optimized.

Architecture

Observations remain separate from canonical network state and are associated
with state through validated provenance.

This preserves deterministic state identity while providing an evidence layer
for future causal analysis.

Limitations

• No causal semantics yet.
• No distributed observation ingestion.
• No production-scale telemetry pipeline.
• Link-level observation subjects and richer network metrics remain future work.

Next

v0.5.0-alpha — Causal Memory

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This discussion was created from the release RAHN v0.4.0-alpha — Observability.