core/docs/analysis/logos-substrate-collapse-2026-07-28.md

Finding: the semantic ground collapses — "alignment" is implemented as overwrite

Date: 2026-07-28 · measured at 472fc0a8 · FA-1 of the Foundations Audit · G-25 Status: substrate finding, L2. Load-bearing for every layer above it, for the keel's logos/ and algebra/ contracts (K1/K3), and for the standing question of why capability has not moved.

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0. The one-sentence finding

packs.compiler._blend_feature_versors — the function every cross-language and morphological "nudge" in the system calls, at three sites, with three different declared strengths — ignores its strength argument and returns the target verbatim. Nothing in CORE is blended toward anything. Aligned words are overwritten by their partners, so the three-language manifold ADR-0005/0015 designs as three charts on one semantic space is, in the mounted configuration the runtime actually uses, one chart with aliases.

def _blend_feature_versors(source, target, strength):
    strength = max(0.0, min(1.0, float(strength)))
    if strength <= 0.0:
        return np.asarray(source, dtype=np.float32).copy()
    return np.asarray(target, dtype=np.float32).copy()   # ← any strength > 0

ADR-0015 states the requirement this violates twice over: aligned clauses must resonate "without flattening their distinctions", and "cross-language alignment is a weighted graph, not a translation table." It is a translation table, applied destructively.

1. What it costs, measured

Instrument: evals/logos/manifold_collapse.py. Coordinates are compared bit-exactly (ndarray.tobytes()) — there is no tolerance to tune, and no metric to argue about. Pinned by tests/test_manifold_collapse_floor.py (registered in smoke).

Configuration	surfaces	distinct coordinates	lost	groups
en_minimal_v1 alone	220	220	0	0
grc_logos_micro_v1 alone	11	11	0	0
he_logos_micro_v1 alone	9	8	1	אור/אוֹר
trilingual mounted	239	202	37	11

Mounting the depth packs — the operation designed to add depth — removes 37 distinct coordinates. English alone is collision-free; English mounted with Hebrew and Greek is not.

The eleven collapsed groups, verbatim:

ask · how · question · what · when · where · which · who · why · ἐρωτάω
begin · beginning · origin · source · ראשית · ἀρχή
breath · spirit · πνεῦμα · רוח
create · image · κτίζω · ברא
light · φῶς · אוֹר · אור
read · receive · silence · λαμβάνω
say · speak · voice · λέγω
word · λόγος · דבר · דברים
answer · respond · ἀποκρίνομαι
truth · אמת · ἀλήθεια
life · חיים

Read the first line again. Nine English question words occupy one coordinate. In the semantic ground the reader stands on, who, why, when, where, how and which are the same point — and they are collapsed not by any English-side decision but because one Greek verb, ἐρωτάω, shares their primary semantic domain and drags the whole group into the multi-language branch. read, receive and silence are likewise one point.

Attribution (measured by disabling each site in turn):

Site	lost coordinates	what it does
_apply_mounted_primary_domain_resonance (mount time, strength 0.40)	34	overwrites every member of a multi-language primary-domain group with the English prototype
_apply_alignment_corrections (pack load, strength weight × 0.10)	2	overwrites the home token with the foreign token, last foreign pack wins
_apply_morphology_cluster_corrections (compile, strength 0.40)	1	overwrites every same-root form with the cluster prototype

The mount-time site is the dominant cause and carries a comment that named the open question precisely — "it does not yet isolate structural derivation (Hebrew/Greek morphology operators) from this function's nudge" — and pointed at docs/handoff/ADR-0167-FOLLOWUPS.md §6, a file that does not exist. The isolation question is now answered: there is no structural derivation left to isolate, because the 0.40 "blend factor" is a 1.00 replacement.

2. The inversion this produces

ADR-0005 assigns the roles: Hebrew as depth anchor, Greek as relational depth, English as articulation surface. The mount-time prototype rule is next((surface for language, surface in surfaces if language == "en"), surfaces[0][1]) — English is preferred as the prototype, and every other language is replaced by it.

The design's dependency runs exactly backwards. The depth languages do not anchor English; they are deleted into it. דבר is not near word in the mounted manifold — it is word, bit for bit, and so is λόγος, and so is דברים.

At pack-load time the same function runs with the foreign packs in sorted() order, so he[דבר] is first overwritten by en[word] and then by grc[λόγος]: which language a Hebrew token becomes is decided by the alphabetical order of pack ids.

3. Four "resonance proofs" that pass because the compared quantities are identical

docs/analysis/holonomy-resonance-proof-not-robust-2026-06-14.md audited the clause-level resonance and found it decoration. It explicitly deferred the token-level tests: "whether each is robust or another cherry-picked configuration is an open follow-up, not covered by this finding." That follow-up is now closed, and the answer is worse than cherry-picking:

Test	Why it passes
test_light_alignment_clusters_across_mounted_trilingual_field	cga_inner(light, אוֹר) = 3.0220894813537598 = cga_inner(light, light). The versors are the same array.
test_triple_alignment_closer_than_other_triples	same — aligned pairs are self-comparisons
test_same_root_hebrew_forms_land_closer_than_unrelated_noun	דבר and דברים are bit-identical after clustering
test_structured_morphology_improves_same_root_hebrew_resonance	asserts structured > unstructured for the same-root pair; structured makes them identical, so the "improvement" is total collapse

The last one is the sharpest: a test named for an improvement in resonance is green precisely because the distinction it should preserve was destroyed.

This is the repo's own disease definition met exactly — "a test that passes under conditions that bypass the obligation it nominally proves is decoration, not proof" — and it is the fourth independent instance this arc (CLAIMS.md staleness G-22, DOMAIN_PACKS G-23, the hollow distinct-evidence guard in PR-12, and now the semantic ground itself).

4. The second defect: 63 of the 83 alignment edges are silently discarded

The audit charter recorded the alignment corpus as "seed-scale: 11 edges… the ADR's prescribed first cases, never grown beyond them." That is wrong, and the way it is wrong is the finding. Four packs carry alignment.jsonl:

Pack	edges authored	edges that resolve	in serving?
he_logos_micro_v1	11	11 (as overwrites)	secondary
grc_logos_micro_v1	9	9 (as overwrites)	secondary
he_core_cognition_v1	22	0	primary (chat/pack_grounding.py:57)
grc_logos_cognition_v1	41	0	primary (chat/pack_grounding.py:56)
total	83	20

The corpus was grown — 7.5× beyond the seed, to 83 edges — and 76% of it is inert.

The mechanism is four lines. _infer_foreign_pack_ids decides which foreign pack an edge points into by splitting target_id on "-" and looking the first field up in a hardcoded three-entry table:

_PREFIX_TO_PACK = {"he": "he_logos_micro_v1", "grc": "grc_logos_micro_v1", "en": "en_minimal_v1"}
prefix = edge.target_id.split("-")[0]

en-core-cog-001 has prefix "en", so it resolves to en_minimal_v1 — a pack with no such entry id. The lookup misses, _apply_alignment_corrections hits continue, and the edge vanishes without a warning, a counter, or a test. Entry ids are pack-local; the resolver is global and frozen at three pack names, so any pack beyond the original three is unreachable by construction — including the two that serving actually grounds Hebrew and Greek against.

Both branches of the pillar therefore fail, in opposite directions: the packs whose alignment works destroy distinctions, and the packs serving actually uses have alignment that does nothing at all. FA-1's work-order item 4 — "grow-or-declare the alignment corpus" — is answered before it begins: it was grown, and the growth was never connected.

5. The third defect: holonomy does not close

Independent of the collapse, the object named holonomy is not one.

algebra/holonomy.py documents, in the module docstring and in the function docstring:

A prompt is encoded as the geometric holonomy of its forward+reverse versor walk. The walk closes… Forward walk: F = w1·…·wn · Reverse walk: R = (1−alpha)·reverse(wn)·…·reverse(w1) · Holonomy: H = F · R

The implementation computes F and returns it. There is no R. Commit fca6216e ("Stabilize holonomy accumulation", 2026-05-13) deleted the reverse accumulation and kept the docstring that describes it — the original at b80dd57a did compute H = geometric_product(F, R). Consequences, measured:

• alpha is validated (0.0 <= alpha <= 1.0) and then never read. holonomy_encode(v, alpha=0.0) and holonomy_encode(v, alpha=1.0) return bit-identical arrays. core/physics/biography.py:94 passes alpha=alpha into it — a caller steering a parameter that does nothing.
• A walk followed by its own reverse does not return to identity (scalar 164.6, non-scalar norm 4044.2). A closed-loop transport must; an open path product need not, and this is one.

ADR-0015's validation gate is closure — holonomy(he) ≈ holonomy(grc) ≈ holonomy(en). A quantity that never closes has no reason to be invariant across representations, so the 2026-06-14 negative result was not a surprising failure of the geometry: it is what this implementation predicts. That doc's open question RQ2 — "is the per-token _position_rotor injection drowning the semantic signal in path-order geometry?" — was aimed correctly and could not see the deletion, because the docstring said the closure was there.

6. The cure was already in the algebra layer, one import away

A linear blend of two versors is not a versor — the Cl(4,1) versor group is not closed under addition — and VocabManifold.update() correctly refuses non-versors (residual > 1e-5). Substituting a naive lerp for the overwrite raises ValueError: Word 'דברים': replacement versor residual 3.68e-02 exceeds 1.0e-05 immediately. The overwrite is what a lerp degrades into once the guard rejects it. The guard was right; the escape was wrong.

The correct operation is interpolation on the group — the geodesic from source to target in Spin(4,1) — and algebra/rotor.py has implemented it since the algebra layer's first commit:

blended = geometric_product(rotor_power(word_transition_rotor(source, target), strength), source)

Measured on en[word] → en[light]: unit residual stays at ~1e-7 for every t (three orders of magnitude inside the manifold's tolerance), t=0 returns the source exactly, t=1 the target exactly, and intermediate t genuinely interpolates.

So the deepest layer built the exact tool the layer above it needed, and the layer above never called it. That is the Foundations Audit's thesis — layers assuming connections that were never made — at the foundation, with both halves of the connection present and unjoined.

7. Why this is the answer to "why hasn't capability moved"

Every geometric experiment this project has run was run on this ground:

• the field-reasoner wedge (2026-06-04) — decoration,
• the relational-operator ablation (2026-07-19) — identical to the symbolic baseline,
• ADR-0252 §5 structure-mapping (2026-07-28) — NO-GO at every attribute weight,
• cross-language holonomy resonance (2026-06-14) — anti-correlated.

The convergent explanation recorded in the Perception Arc was "wherever the geometric operation is isomorphic to the arithmetic it replaces, it reproduces it exactly." That is true and insufficient. The measurement here adds the missing half: the geometry had been erased before the experiments started. A fifth of the mounted vocabulary shares coordinates with something else; the tokens that carry question type are one point; the depth languages are aliases of English. No operator defined over that ground can distinguish what the ground does not distinguish, so "geometry adds nothing" was the only available result.

This does not retroactively make those experiments positive — they were well-controlled and their verdicts stand for the encodings they tested. It changes what they are evidence of: they measured operators over a collapsed ground, not the value of geometric operators. The reopening criterion in the foundations audit §4 — "a domain where the geometric encoding is not isomorphic to a trivial symbolic computation" — is now joined by a second, stronger one: re-run on a ground that has not been flattened.

8. Disposition

Not repaired here. ../core is the quarry and the evidence source; L2 is rebuilt in the keel (coreai, K3), where the corrected contract is admitted with these measurements as its provenance. Repairing the compiler in place would move every versor in the system, and the blast radius includes four tests whose current green depends on the collapse — those are decoration to be replaced with real proofs, not regressions to be preserved, and doing that properly is the keel's K3 work, not a patch here.

What lands here instead:

1. The instrument — evals/logos/manifold_collapse.py, deterministic, bit-exact.
2. The pin — tests/test_manifold_collapse_floor.py in smoke, both directions: the collapse may not widen silently, and it may not shrink silently either. Two sabotages observed red (a real interpolation → ValueError from the versor guard; disabling the mount-time site → 37 → 3, which is also how the 34/2/1 attribution above was measured).
3. The four decoration tests are left standing and named here. They are not weakened in this commit: a test that is green for the wrong reason and a test that is red are different signals, and the honest move is the one the 2026-06-14 doc made — record exactly why each is green, so replacing it is a decision someone makes with the evidence in hand.

9. What FA-1 asks next — pre-registered separately

Whether a repaired ground discriminates meaning is a question with a criterion, and the criterion is committed before the run (docs/analysis/fa1-holonomy-gate-preregistration.md), the way ADR-0252 §5 was decided. The mechanism is proven; the capability is not claimed.

Related: docs/analysis/holonomy-resonance-proof-not-robust-2026-06-14.md (the clause-level negative this extends) · docs/plans/2026-07-28-foundations-audit.md (FA-1) · docs/assessment/30-gap-register.md (G-25) · coreai/docs/atlas/00-atlas-overview.md (K1/K3).