Replaces the flat "I don't know — insufficient grounding" disclosure
with a deterministic gradient that names specific vocabulary gaps
and gives operators concrete next steps.
P2.1 — OOV "teach me" surface (chat/oov_surface.py).
When the intent classifier extracts a clean subject lemma but that
lemma is not resident in any mounted lexicon pack, the runtime now
emits a deterministic learning-invitation surface tagged
``grounding_source="oov"`` instead of the universal disclosure.
Surface format (fixed template):
"I haven't learned '{token}' yet (intent: {intent}).
Mounted lexicon packs: {pack_list}.
Teach me via a reviewed PackMutationProposal."
The OOV token passes through ``core._safe_display.safe_display``
before persistence — user-input sanitization at the trust boundary.
No vocabulary is invented; no domain is inferred. Honours the
ADR-0027 proposal-only invariant: the surface invites a reviewed
pack mutation, never silently mutates any pack.
Refactored ``_maybe_pack_grounded_surface`` so every existing
intent branch (COMPARISON / CAUSE / VERIFICATION / CORRECTION /
PROCEDURE / DEFINITION+RECALL) falls through on a None composer
result instead of early-returning. The OOV invitation is the
deterministic fall-through for any clean-subject prompt whose
subject doesn't resolve.
P2.2 — Partial-grounding tier (chat/partial_surface.py).
When exactly one of two COMPARISON lemmas resolves, the runtime
emits a hedged surface that grounds the known side verbatim and
disclaims the OOV side explicitly:
"Whatever '{oov}' is, I can ground '{known}' — pack-grounded
({pack_id}): {d1}; {d2}. I cannot ground the comparison
without learning '{oov}' — teach me via a reviewed
PackMutationProposal."
Tagged ``grounding_source="partial"``. Falls through to OOV
invitation when both lemmas are OOV, and to full pack-grounded
COMPARISON when both resolve — partial is the middle tier in the
five-tier gradient.
Also normalises trailing sentence punctuation on
intent.secondary_subject at the COMPARISON boundary so prompts
like "Compare A and B." (with the period) still resolve B
correctly.
Five-tier gradient (vault → teaching → pack → partial → oov → none).
Test debt retired: four pre-existing tests asserted "OOV → universal
disclosure", which is exactly the contract P2.1/P2.2 inverted.
Rewritten to the new contract. Plus test_procedure_surface.py
gained a test for the OOV gradient on procedure intents.
Verification:
tests/test_oov_surface.py 22 passed
tests/test_partial_surface.py 16 passed
Cognition eval byte-identical:
public 100% / 100% / 91.7% / 100%
holdout 100% / 100% / 83.3% / 100%
Curated lanes all green.
ADR-0063 closes the ADR-0048/0050/0053/0061 hardcoded-cognition-pack
asymmetry. New chat/pack_resolver.py provides resolve_lemma(lemma,
pack_ids) → (resolving_pack_id, semantic_domains) across an ordered
tuple of mounted lexicon packs (first-match-wins, lru_cache per-pack).
Surface composers in chat/pack_grounding.py now consult the resolver
instead of a hardcoded en_core_cognition_v1. en_core_relations_v1
joins RuntimeConfig.input_packs defaults; kinship lemmas now ground
on the live path:
> What is a parent?
parent — pack-grounded (en_core_relations_v1):
kinship.ascendant.direct; kinship.parent; biology.progenitor.
No session evidence yet.
Cross-pack comparison (knowledge × parent) renders composite tag
(en_core_cognition_v1 × en_core_relations_v1). Cognition lane
remains byte-identical: cognition is resolved first and the surface
format for cognition lemmas is unchanged.
Cognition eval (byte-identical to pre-ADR baseline):
public → intent 100% / surface 100% / term 91.7% / closure 100%
holdout → intent 100% / surface 100% / term 83.3% / closure 100%
Curated lanes green: smoke 67 / cognition 121 / teaching 17 /
packs 6 / runtime 19 / algebra 132.
New tests: test_pack_resolver.py (28) + test_cross_pack_grounding.py
(17). test_en_core_relations_v1_pack.py: default-input-packs guard
inverted. test_pack_grounding.py: two stale ADR-0048 tests rewritten
(premises invalidated by ADR-0052/0061; now use fully-out-of-pack
prompts).
chat/teaching_grounding.py UNCHANGED — cognition_chains_v1 corpus
stays cognition-only. Cross-pack teaching corpora are the natural
ADR-0064.
Closes the surface-grounding gap isolated by ADR-0047's
characterisation. Adds the ratified cognition pack as a second
grounding source alongside the session vault.
== chat/pack_grounding.py (new) ==
Loads en_core_cognition_v1's lexicon once (cached; immutable pack)
and exposes:
pack_grounded_surface(lemma) -> str | None
Returns a deterministic, fully pack-sourced surface:
"{lemma} — pack-grounded ({pack_id}): {d1}; {d2}; {d3}. No session evidence yet."
Every visible atom is the lemma or a verbatim semantic_domains
string from the pack. No rewording, no synthesis, no LLM.
== chat/runtime.py ==
_stub_response gains optional pack_grounded_surface= parameter.
_maybe_pack_grounded_surface routes to the pack only when all four
hold: gate_source=="empty_vault", output_language=="en",
intent.tag in {DEFINITION, RECALL}, and intent.subject is a pack
lemma. Safety/ethics refusal still takes priority above this branch.
ChatResponse and TurnEvent gain grounding_source ∈ {vault,pack,none}.
Main walk path tags responses "vault".
== core/cognition/pipeline.py ==
gate_fired detection moved from string equality on the universal
disclosure to provenance:
gate_fired = response.vault_hits == 0 and response.grounding_source != "vault"
Same intent (suppress realizer template on gate-fired turns),
broader stub-path surface set.
== Characterisation (core eval cognition, 13-case public split) ==
Metric Pre Post Δ
intent_accuracy 100.0% 100.0% 0
surface_groundedness 15.4% 46.2% +30.8 pp
term_capture_rate 0.0% 33.3% +33.3 pp
versor_closure_rate 100.0% 100.0% 0
Lift is non-uniform by design: only single-lemma DEFINITION/RECALL
on pack-known English subjects engage. CAUSE/COMPARISON/VERIFICATION
and multi-word OOV subjects still return the universal disclosure —
fabricating those would violate the no-LLM-fallback doctrine.
== Tests ==
tests/test_pack_grounding.py 18 passed
tests/test_semantic_realizer_integration.py (updated) 1 stub-path test
pinned to the broader contract: surface is either universal
disclosure or pack-grounded; never the realizer template.
== Lanes ==
smoke 67 cognition 121 runtime 19 algebra 132
teaching 17 packs 6
versor_condition(F) < 1e-6 invariant unaffected (no algebra changes).
Shay