RAHN v0.5.0-alpha — Causal Memory

[MHAlikhani]

RAHN v0.5.0-alpha — Causal Memory

Pre-release. Tag: v0.5.0-alpha (commit 96a9c9e). Publish as Pre-release, category: Announcements.

RAHN is a stateful execution architecture for evolving networks — it gives networks state, memory, causality, and verifiable evolution. This release adds the "causality" piece as asserted, honestly-labeled structure: RAHN records and queries causal relations; it does not infer them.

Highlights

• Causal edges between immutable anchors — obs:<seq> (v0.4 observation log) or commit:<id> (content-addressed commits).
• Strict epistemic statuses: temporal-correlation (ordering only), hypothesis (suspected link), verified — the last structurally restricted to edges whose both anchors are commits, the only mechanically checkable provenance class.
• DAG validation: cycle-closing insertions rejected (deterministic DFS); dangling anchors rejected against both logs.
• Append-only causal log (.rahn/causal.log) with versioned framing; corruption refused loudly, never repaired.
• CLI: rahn relate <from> <to> <status> --note <text> and rahn explain <anchor> — incidents as connected components, output carrying edge statuses verbatim. The system never generates edges automatically.

Evidence (measured, single machine)

10 000-edge linear chain: graph build 18.5 ms · deepest-case cycle check 4.3 ms · incident query 5.7 ms — the last after fixing an O(V·E) first implementation (2 701.9 ms) found by the benchmark itself. Methodology: docs/research/stages/v0.5.md.

Known limitations

• Edges are human-asserted; RAHN validates structure, proves nothing about the world.
• No automatic edge extraction, no causal inference, no AI reasoning, no distributed causal memory.
• Incidents are implicit components; named incident records and narrative explain <incident> are future work.
• Addressing and traffic control remain deferred (Stage 2/3 scope), limiting real-telemetry exercises.

Compatibility

No canonical-format change for states; causal.log is a new artifact with its own versioned framing.

Next

v0.6 — Distributed State, requirements-first (RQ7) before any replication mechanism is chosen.

Full context: CHANGELOG · Stage 5 report · ADR 0014 · White paper

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This discussion was created from the release RAHN v0.5.0-alpha — Causal Memory.