fix(demo): harden epistemic truth-state authority — sealed corpus + entailment-decided inference

Two-pass hardening of the #690 demo so no epistemic state is proposer-mintable:

Pass 1 (sealed corpus, from the reconciliation pass):
- evidence items are references only (evidence_id + content_sha256) resolved
  against a committed content-addressed corpus (evidence_corpus.json)
- support derived from committed subject/predicate match; independence from
  distinct provenance_root values; proposer support/independence labels are
  rejected by the closed schema
- evidence-strength taxonomy (substrate-capability vs interface-contract) in
  PUBLIC-DEMO-ROADMAP / DEMO-PACKAGING-CHECKLIST; position-paper refinements

Pass 2 (entailment-decided inference, closes a live false-status hazard):
- the merged inferred leg required only that premise IDs resolve — a claim
  with no support citing one unrelated record as a premise was assigned
  'inferred' (empirically confirmed). inferred is now decided by
  generate.proof_chain.entail (sound+complete ROBDD) over resolved corpus
  premises, cross-checked against the independent truth-table oracle
  (evals.deductive_logic.oracle, no shared code); proof keys + oracle verdict
  in the trace; disagreement => defensive refusal; refutation => contradicted
- committed adversarial scenario unrelated-premise-still-undetermined proves
  the attack now lands on undetermined
- corpus seal (corpus_sha256) pinned into every evaluated trace; scope
  refusals no longer consult the corpus; corpus cache hands out copies;
  claim subject/predicate constrained to atom-compatible snake_case
- .gitignore: private packet dir, agent worktrees, tooling artifacts

Validation: 30 demo tests; 96 across all three demo suites; 7/7 scenarios
double-run byte-identical; 61 architectural invariants green.

docs/planning/PUBLIC-DEMO-ROADMAP.md

@@ -131,21 +131,47 @@ citing records that merely exist yields `undetermined` (the committed
 must not be described as production epistemic evaluation across arbitrary evidence
 sources.
 
+### Proof-Carrying Coherence Promotion Demo (#696 — vault-owned certified promotion)
+
+Status: merged (PR #696).
+
+Evidence class: substrate-capability demo within a local deterministic envelope.
+
+Purpose: demonstrate deterministic knowledge-admission authority by
+replay-verified proof and vault-owned promotion. A model-style proposer can attach
+status, confidence, proof, certificate, and trace-hash garbage, but CORE fresh-reads
+store state, recomputes the proof under the pinned deductive engine, replay-verifies
+the certificate, and promotes or refuses only through
+`VaultStore.apply_certified_promotion`.
+
+Public outcome vocabulary:
+
+- `promoted`;
+- `refused`;
+- `invalid`.
+
+Evidence caveat: this proves proof-carrying `SPECULATIVE -> COHERENT` promotion
+only for curator-certified readings over already-`COHERENT` premises in a
+fixture-driven local store arena. It does not prove runtime integration,
+open-world autonomous learning, arbitrary evidence ingestion, or normative
+clearance.
+
 ## Proposed
 
 Recommended order of next public evidence:
 
-1. Deductive Entailment / Proof-Carrying Authority Demo (next substrate-capability target);
+1. Standalone Deductive Entailment Authority Demo (formal entailment showcase);
 2. Embodied Authority Simulation Demo (simulation-only);
 3. SaaS / On-Prem Boundary Demo.
 
-Merged evidence establishes three authority boundaries: authority over claims
+Merged evidence establishes four authority boundaries: authority over claims
-(#687), proposed tool actions (#688), and epistemic state assignment (#690). The
+(#687), proposed tool actions (#688), epistemic state assignment (#690), and
-next public target should make the non-trivial substrate decision visible: a
+vault-owned proof-carrying promotion (#696). The next public target should isolate
-proposer supplies premises, conclusion, and claimed verdict; CORE decides through
+formal entailment itself as a standalone showcase: a proposer supplies premises,
-the existing deductive/proof surface and emits replayable proof evidence.
+conclusion, and claimed verdict; CORE decides through the existing deductive/proof
+surface and emits replayable proof evidence.
 
-### Deductive Entailment / Proof-Carrying Authority Demo
+### Standalone Deductive Entailment Authority Demo
 
 Status: proposed.
 

docs/position_paper.md

@@ -151,8 +151,11 @@ independently-checked deductive engine (`deductive_logic_v1`, §4) can certify i
 deterministically, with the proof chain as the audit artifact — the logical form
 of the *"structural coherence metric"* ADR-0021 names as the successor to curator
 mediation. What review still gates there is the faithfulness of the reading, not
-the deduction. This proof-carrying promotion path is **specified but not yet
+the deduction. This proof-carrying promotion path is now ratified and implemented
-wired**; until it lands, all promotion is curator-mediated.
+for the narrow deductively entailed subclass: curator-certified readings,
+already-COHERENT premises, replay-verified proof, and vault-owned mutation.
+Runtime turn integration remains separate; no open-world autonomous learning
+claim follows from this path.
 
 This is not a safety overlay. It is a consequence of the decoding thesis: if the
 system decodes a reality that already is, then inputs that contradict — or merely
@@ -438,21 +441,23 @@ small local envelope.
 ### Authority over epistemic state assignment — PR #690, merge `e80c8eae`
 
 `demos/epistemic_truth_state/` demonstrates the same typed boundary for epistemic
-state assignment across six outcomes. A model-style proposer submits a claim,
+state assignment across seven outcomes. A model-style proposer submits a claim,
 sealed evidence references, and a `proposed_state`; the demo assigns a canonical
 state from committed corpus records whose content hashes must match.
 `proposer_state_ignored: true` on every non-invalid output.
 
-Typed state vocabulary: `verified`, `evidenced`, `inferred`, `undetermined`,
+Typed state vocabulary: `verified`, `evidenced`, `inferred`, `contradicted`,
-`scope_boundary`. A proposer that injects `assigned_state` or `authority_path` into
+`undetermined`, `scope_boundary`. A proposer that injects `assigned_state` or
-the request payload is rejected at the typed schema boundary before evaluation.
+`authority_path` into the request payload is rejected at the typed schema boundary
+before evaluation.
 
 Representative trace hashes:
-- Verified: `1341c27c5906ae52…` (2 sealed corpus records with distinct provenance roots, `normative_clearance: unassessable`)
+- Verified: `fd0042f5f2bea77d…` (2 sealed corpus records with distinct provenance roots, `normative_clearance: unassessable`)
-- Evidenced: `f9f2e153e66aaba9…` (1 item, below threshold — proposer proposed `verified`)
+- Evidenced: `c4fcd4ae033cad4f…` (1 item, below threshold — proposer proposed `verified`)
-- Inferred: `bc11e858ece14081…` (premise-only evidence — proposer proposed `verified`)
+- Inferred: `3d7e92fceeba3281…` (entailment-decided premise evidence — proposer proposed `verified`)
-- Undetermined: `35b319eb0186be2d…` (off-topic evidence)
+- Unrelated premise: `48c9932a5dd99f1a…` (resolvable but unrelated premise, engine returns `unknown`)
-- Refused: `c9ef9560bcf71052…` (outside epistemic envelope)
+- Undetermined: `80559d4b02668e36…` (off-topic evidence)
+- Refused: `f1d8936f7616d273…` (outside epistemic envelope)
 - Invalid: `18dda5b4017b223b…` (5 smuggled output fields rejected)
 
 Run: `python demos/epistemic_truth_state/run_demo.py`
@@ -462,8 +467,9 @@ scenario; the invalid scenario has `null` because evaluation never reached the
 authority path. The demo runs no normative, safety, or ethics clearance pass. The
 evidence corpus is local fixture evidence, so #690 should be read as a
 state-authority demo over a sealed local corpus, not as proof that CORE evaluates
-arbitrary evidence sources. The next proof obligation is proof-carrying entailment
+arbitrary evidence sources. Proof-carrying promotion is demonstrated separately by
-evidence for claims that should move from stated premises to promoted knowledge.
+#696 for the narrow, curator-certified, deductively entailed subclass; it is not
+runtime turn integration or open-world autonomous learning.
 
 ---