v1.8.1

[1.8.1] — 2026-07-02

Falsification-audit hardening (four-axis audit 2026-07-02; register C-67/C-68/C-69/C-70).
Bug fixes with an identical contract — the code now honors what the docs already promised.
No public-surface change; CONFORMANCE_FLOOR stays 1.0.0.

Fixed

• reconcile_proportional conserves exactly for any nonzero draw sum (C-68, the audit's one
  hard finding). The torch-port's + 1e-8 denominator epsilon — a float32 no-op for draw sums
  ≳ 0.1 but a silent deflator for tiny nonzero sums (a draw sum of 1e-8 reconciled a country
  total of 100 to 50, with no error signal, violating the Reconcile.md §3 sum-to-country
  guarantee) — is replaced by an explicit all-zero-draw guard: exact division for any nonzero
  sum; all-zero draws stay zero exactly as before. Bit-identical on all realistic data
  (torch-oracle parity unchanged and green).
• Negative country totals now fail loud (C-68/F8): reconcile_proportional raises
  ValueError instead of silently clamping the output to zero (sum 0 ≠ the requested total).
• The published conformance suites refuse to run under python -O (C-67): all three
  (views_frames.conformance, summarize, reconcile) now guard their entry points with
  _require_assertions() — under optimized bytecode (which strips the suites' assert
  statements) they raise RuntimeError instead of silently reporting green.
• Empty-index searchsorted returns all -1 (C-69) — the documented not-found value —
  instead of crashing with an obscure IndexError (the np.clip(pos, 0, -1) corner).

Notes

• Regression pins for all four fixes: tests/test_falsification_safety_audit_2026_07.py.
• Reconcile.md §6 documents the two reconcile behaviors; proportional.py's module docstring
  records the deliberate (bit-parity-preserving) deviation from the torch original.
• Register: C-67/C-68/C-69 registered-and-resolved; C-70 (the audit's docs/tests polish
  bundle) opened and cleared in the same release (below).

Tests

• C-70 test adds (#195): the share-proportionality law (the method's defining
  forecast-proportion property, previously pinned only by the frozen-oracle fixtures); an mmap
  read-only pin (writeable is False, in-place write raises); the reconcile
  missing-(time, priogrid_gid)-mapping-entry raise.

Documentation

• C-70 docs refresh (#196): CLAUDE.md rewritten for the released three-package reality;
  README banner → v1.8.0 + chronicle; ADR-013 as-built amendment (feature_names); CIC accuracy
  fixes (§5 artifact names → values.npy, PredictionFrame §6 real dtype behavior, index §6
  NaN-via-dtype, Reconcile §10 pinning files); CICs/ADRs README framing refreshed; and a
  recurrence guard — validate_docs.sh now checks the README banner's MAJOR.MINOR against
  pyproject.toml.