Phase 0 of the field-reasoner wedge — net hardening regardless of the
experiment's outcome.
- algebra/cga.py: embed_point gains a dtype kwarg (f32 default byte-unchanged;
cl41.geometric_product already preserves f64) + read_scalar_e1 projective
dehomogenization read-back (weight-invariant; correct for dilations, where a
raw distance-from-origin is wrong) + EMBED_EXACT_MAX pinned magnitude ceiling.
f32 silently collapsed integer coordinates past ~1e4.
- core/reasoning/evidence.py: verify_tier2_agreement now keys independence on a
reader_lineage pathway token (refuses SAME_READER_LINEAGE), replacing the
label-only len(set(signatures))<2 check a single reader could satisfy by
relabeling. reader_lineage is excluded from canonical serialization, so the
entailment trace_hash is unchanged.
- tests INV-27: transitive reader-disjointness over TIER2_READER_PATHWAYS makes
the lineage check load-bearing (distinct lineage => proven import-disjoint
pathway). The two seeded readers share zero transitive first-party modules.
Green: smoke 87, algebra 82, cognition 121, 53 architectural invariants,
reasoning/deductive/r1 50; 16 new f64-exactness tests; zero regressions.
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