The new value-collection crucibles in the TTU and chain differential
campaigns immediately found three engine defects:
- TTU join pushed 0-strength 'matches' (missing computed leg, or
0-possibility edges, with minPossibility 0) as valid paths: denied
decisions reported tuple_to_userset_found and leaked the tupleset edge's
value into collectedValues. Both join modes now require combined > 0.
- A ReferenceError (bare resolveKey) crashed the computed-join mode under
collectValues, silently turning the whole check into an evaluation_error
denial. Fixed the call to this.arbiter.resolveKey.
- Multi-path TTU fusion fell back to Math.max over all path reliabilities,
pairing the winning possibility with another intermediate's reliability.
The fallback now picks the max-possibility path's reliability.
New campaigns: defeasible and intersection differential properties
(when/unless and min-children with reliability parity under persistent/
partial splits). The model-based campaign keeps its reliability crucible;
its value comparison was reverted — the harness's shrink reporting is
opaque and unreconstructable there, and the value semantics are covered by
the TTU/chain campaigns instead.
The reliability gap found last round was invisible to every parity mirror
(they compared possibility only). Hardened the existing campaigns so the
mirrors carry reliability too:
- batch-order-parity: batch ops carry reliability; the mirror tracks
last-write-wins reliability and the crucible asserts engine reliability
parity (mirror corrected: add-on-existing preserves reliability, it does
not reset it).
- rule-kind-partial-parity: the TTU differential property now generates
per-edge reliabilities and asserts the winning intermediate's
reliability (tupleset.reli * computed.reli); a new chain reliability
differential property does the same for 2-step chains.
- snapshot-quantization-parity: edges carry deterministic reliabilities and
the round-trip pins the codec's reliability channel (product-aware
tolerance: chain reliability multiplies two quantized inputs).
- model-based-graph: the reference model tracks reliability per tuple and
checks it alongside possibility for direct and chain queries.
The model crucible immediately caught a real bug: the direct-check fast
path returned the relation's reliability on a DENIED decision (possibility
0), while the rule-collection path zeroes it — denied results leaked
reliability. Both fast-path branches (direct match and threshold_not_met)
now report reliability 0 when the decision is denied.
John Dvorak