ADR-0048: Origin-Partitioned Recall + Energy-Neutral Ranking — Reaching Autobiographical Memory

Status: Proposed — v3, revised after adversarial-design-review (GO_WITH_CHANGES, 2026-07-26). v1 (situated longer query) and the v2 research-is-the-competitor premise were both corrected by measurement. Relates to: ADR-0047 (attention re-ranks within a result — bottom-up: reach → energy-neutral → awareness → attention), the research: ingest prefix, WavefrontMeta (types.rs:517 — note the existing provenance field is the entropy stamp, a name collision this ADR must avoid), and hemisphere.rs:232-247 (the full-scan resonate that ranks by similarity × energy).

Context

The origin failure was measured, not assumed. Two live probes:

• v1 (situated longer query) made recall worse — a longer query fed the large research: corpus more to grab.
• v2 (blame the research corpus) was refuted by a third probe the reviewer ran: recall "where is Kannaka Labs" --top-k 20 returns zero research: memories — the top hits are all episodic (OBC art, recognition milestones, sessions), and the lab is still absent.

The real competitor is energy imbalance, not provenance. Ranking is similarity × energy (hemisphere.rs:238), and every recall pumps the surfaced memory's energy toward the 2.0 cap. So frequently-recalled memories rich-get- richer; the never-surfaced lab sits at baseline energy and loses even to weaker- similarity episodic memories. Two forces bury autobiographical recall: (1) the semantic corpus out-competes on conceptual queries, and (2) within episodic, recall-frequency energy out-competes a cold fact. This ADR addresses both, and is honest that surfacing the lab needs a stack, not one fix.

Decision

Two independent mechanisms, each falsifiable on its own gate.

1. Origin-partitioned recall (reachability)

• A persisted typed origin field. Add origin: OriginClass { Ingested, Lived } as the last serialized field on WavefrontMeta (bincode default-fallback so old .hrm still load, mirroring types.rs:509-517). Stamped at the call site at remember time (research/OpenAlex handler → Ingested; remember/dream/ perception → Lived), backfilled once from the canonical research: prefix, and always read from metadata — never recomputed from the content string (recomputing would make it content-derived like the refuted Fano class). Do not overload the existing entropy provenance field or auto-detected Modality (which stamps autobiographical text Semantic). Fix the writer/reader prefix skew ("research: " vs "research:") and assert byte-identical predicates.
• Single-pass two-heap partition. Inside the existing full-scan resonate loop (hemisphere.rs:232), bin each scored candidate into an Ingested or Lived top-K heap by origin. One scan, two ranked outputs — no separate index, no second resonate() call (both refuted as unnecessary/costly).
• Quota merge, not weight-then-truncate. Fetch top-K from each partition (never top_k/2 — that returns 0 for top_k=1 liveness callers), union, and reserve ≥1 configurable slot per partition (round-robin by rank). Intent sets ordering within the quota; it can never exclude a partition. This preserves the ADR-0047 invariant that the fix is structural (candidate membership), not a post-truncate multiply.
• Intent is an explicit caller parameter, intent: Option<Intent>, threaded through the recall path; default Unknown → balanced. The benchmark drives the same path production uses (no test-only injection). A token heuristic is a separate, later increment that must pass negative controls before it may gate ("where do grid cells fire" MUST classify knowledge; a bare where/place token must not imply episodic) — it is not the floor, killing the circular dependency on the unbuilt awareness layer.
• Quarantine hallucinated and non-text-modality memories out of the Lived partition (reuse the re_encode_all predicate, chiral.rs:642) so dreams and raw perception don't compete as lived experience.

2. Energy-neutral ranking (within-episodic reach)

Within the Lived partition, rank by similarity (or similarity × √energy) instead of similarity × energy, so a never-recalled memory is not buried by the rich-get-richer energy of frequently-surfaced ones. This is the measured within-episodic surfacer; partitioning alone cannot do it. Flag-gated, energy array left byte-identical (ranking-only change; no write-back).

Two falsifiable gates (honest about composition)

• G1 — ADR-0048-owned, falsifiable in isolation (gates the partition flag): for an autobiographical-intent query the Lived partition contributes ≥N candidates to the merged pool; knowledge-query research recall is not regressed (Δrank ≤ 0); recall(q, 1) is non-empty for every caller. Measured on the chiral path (not the flat readonly mirror), energy byte-identical, on a corpus with zero research: memories partitioned recall == today rank-for-rank.
• G2 — composed, owned by the rollup: the cold "where is Kannaka Labs" query rank-wins the lab. Explicitly requires energy-neutral ranking + awareness (situated intent) + ADR-0047 attention — the ADR records up front that partition alone cannot pass this, because the competitor is intra-episodic energy, not research.

Confirmed (do not regress)

• Pre-fetch partition genuinely escapes ADR-0047 post-fetch inertness by changing candidate-set membership — preserve; a later refactor collapsing it to a post-truncate weight silently regresses to the Fano failure.
• The 2-class origin axis differs from Fano's 7 content-classes only because it is a persisted origin fact read from metadata — ship the field before claiming it.
• Partitioning is affordable on the existing brute-force scan (no ANN/HNSW needed).

Build order (flags default OFF; G1 gates before G2)

1. Typed origin field — struct + serialize (bincode-fallback), call-site stamps, one-time prefix backfill + an audit (how many research: matches vs known-research that don't; enumerate every ingest path).
2. Single-pass two-heap partition + quota merge + explicit intent param — with the empty-semantic == today guard.
3. G1 benchmark — chiral path, Δrank, no knowledge regression, top_k=1 non-empty, energy byte-identical.
4. Energy-neutral ranking (ranking-only, flagged).
5. Compose upward toward G2 — awareness (intent + situate), then ADR-0047.

Alternatives considered (and discarded by the review)

• Post-fetch provenance weight / situated longer query — refuted (inert / worse).
• Separate per-provenance index / two resonate() calls — unnecessary; the single existing scan bins at identical cost.
• Heuristic intent as the floor gate — deferred; self-defeats on the paired fixtures.
• Blaming the research corpus — measured false; the within-episodic energy imbalance is co-primary.