Local deterministic public evidence for the ratified PCCP capability:
proposer submits claim + proof candidate + status/confidence garbage; CORE
ignores proposer authority, fresh-reads curator-certified store state,
recomputes the proof under the pinned engine, and promotes/refuses only
through VaultStore.apply_certified_promotion. The trace proves the decision.
- demos/proof_carrying_promotion/{schema.json,authority.py,run_demo.py}:
closed recursive schema (output fields unsuppliable at the root), the REAL
decider (teaching.proof_promotion.certify_promotion) and the REAL owner —
no demo-local promotion reimplementation. The local arena is rebuilt via
VaultStore.from_dict over dict-literal metadata: demos/ is scanned by
INV-21/INV-24/INV-29, and the demo adds no vault writer, no recall site,
and no status-transition site (proven in tests with the invariants' own
detectors).
- 8 fixtures + pinned expected artifacts: entailed-promotes,
proposer-status-ignored, non-coherent-premise, uncertified-reading,
tampered-certificate (fails byte replay), stale-premise-status (same
honest certificate digest as the promoting run — live state is what
differs), non-sequitur, invalid-state-smuggling (rejected before
evaluation, authority_evaluated=false, null digest).
- Hardened runner per the #688/#690 pattern: default out/ dir, unsafe
output roots refused, --write-expected explicit, double-run byte-identity
enforced per fixture, scenario pass/fail summary.
- tests/test_proof_carrying_promotion_demo.py (26): expected-artifact
conformance, tamper detection, proposer-garbage decision-invariance (incl.
on the promotable setup), refused-cases-mutate-nothing, REFUTED-never-
demotes, trace-hash folds certificate digest, forbidden-import/call scan
(incl. uuid/random/time), INV-21/INV-29 allowlists pinned unchanged, no
named-company/strategy terms.
No runtime turn integration; promotion remains SPECULATIVE->COHERENT only;
README carries the full honesty ledger.
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