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Reasoning layer: analogy/induction/abduction/causal/planning over §5 geometry ops

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Compose the live relational-neighborhood geometry OPERATORS into five reasoning
modes as pure, read-only C (engram_reason.{h,c}); each is proven with closed-form
constructed tests before it ships, not declared.

- ANALOGY  (Procrustes R + residual translation, apply to C, rank candidates)
- INDUCTION (combine-pooled rule geometry + point-to-manifold membership)
- ABDUCTION (best-explaining structure by point-to-manifold fit)
- CAUSAL   (centroid-cosine correlation vs directed influence: temporal
            precedence + association surviving confounder control via subtract;
            emits a correlation-vs-causation flag)
- PLANNING (geo-distance edges + Dijkstra → discrete geodesic path)

A shared point-to-manifold fit primitive underlies induction membership and
abduction ranking. engram/test/run_reason_tests.sh: 33/33 checks on both PERF
and ASan/UBSan passes; macOS leaks 0/0.

ANALOGY is surfaced as an el builtin (engram_reason_analogy_json) via the same
pass-through the §5 operators use — demonstrated callable from compiled El with a
container-capped fold (no self-host fold). The other four are C-layer only: their
set/point/timestamp inputs do not map to the flat-CSV el ABI without touching
codegen (deferred). engram_reason.c must join the server link line beside
engram_geometry.c at cutover. See docs/runbooks/2026-08-13-reasoning-operators-*.
This commit is contained in:
Will Anderson
2026-08-13 01:33:14 -05:00
parent 85eee42106
commit a3358dfc95
8 changed files with 868 additions and 0 deletions
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lang/runtime/el_runtime.h
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@@ -630,6 +630,10 @@ el_val_t engram_geo_subtract_json(el_val_t a_seeds, el_val_t b_seeds, el_val_t
el_val_t engram_geo_combine_json(el_val_t a_seeds, el_val_t b_seeds);
el_val_t engram_geo_distance_json(el_val_t a_seeds, el_val_t b_seeds);
el_val_t engram_geo_analogy_json(el_val_t a_seeds, el_val_t b_seeds);
/* reasoning layer (compositions over §5 operators). ANALOGY maps cleanly to the
* flat-CSV seed ABI; the other modes take set/point/timestamp inputs deferred from
* this ABI (see engram_reason.h / the reasoning-operators runbook). */
el_val_t engram_reason_analogy_json(el_val_t a_seeds, el_val_t b_seeds, el_val_t c_seeds);
el_val_t engram_consolidate_permanence(el_val_t node_id);
el_val_t engram_age_field(el_val_t delta_ms);
el_val_t engram_age_field_catchup(void);