Three issues in the drift-fix landing (922bddc) addressed:
1. algebra/rotor.py: add rotor_power(R, alpha) — slerp on the rotor manifold
via the rotor's exp/log decomposition. Handles both rotation planes
(cos/sin) and boost planes (cosh/sinh); falls back to identity for
non-simple bivectors or null cases.
2. generate/stream.py: the score-weighted vault recall previously did
`weight*V + (1-weight)*np.eye(V.shape[0])`. Two bugs:
- np.eye produced a 32x32 matrix for a 1D multivector, crashing
versor_apply with a broadcasting error (2 cognition tests failing
on main).
- The linear blend produced multivectors with versor_condition up to
2.2e-2, violating the non-negotiable 1e-6 invariant declared in
CLAUDE.md. Now uses rotor_power(V, weight) which stays on the
manifold by construction (versor_condition <= 1.1e-16).
3. session/context.py: respond() now re-binds result.final_state to
self.state after finalize_turn's anchor pull, restoring the
"respond returns the same object that was vaulted" contract
(test_engine_loop_proof regression).
Verification:
- 41 new tests in tests/test_rotor_power.py covering closure preservation,
alpha=0/1 boundaries, half-angle composition, and word-transition rotors.
- Empirical multi-turn versor_condition stays at machine epsilon with
anchor pull, max 9.4e-7 without (under threshold either way after fix).
- Full suite: 609 passed, 4 skipped, 0 failed.
Replace synthetic word-transition rotor construction with the closed product B * reverse(A).
- preserve make_rotor_from_angle compatibility
- fail closed on non-closed transition candidates instead of using construction fallback behavior
- validate transition operator condition
- add targeted transition rotor regression tests
No GitHub CI/status checks were exposed for this PR.
Make versor construction fail closed instead of synthesizing hash-derived fallback rotors.
- remove pseudo-random construction fallback from unitize_versor
- add signed residual helper for +1 field states vs ±1 manifold entries
- validate vocab manifold entries with full residuals
- document antipodal transition rotor failure contract
- add focused invariant tests for versor closure and manifold validation
algebra/rotor.py and persona/motor.py were calling normalize_to_versor()
which is the gate-only injection primitive. Both are construction-time
sites (building rotors and motors from raw arrays), so the correct call
is unitize_versor().
Also tightens TestINV02 to scan for normalize_to_versor violations only —
unitize_versor has its own legitimate call sites and is not under the
same single-site restriction. Adds a new TestINV02b that verifies
unitize_versor is NOT called inside propagation, generation, or vault
recall paths.
Fixes: INV-02 architectural invariant test failure.
- Add algebra/rotor.py: word_transition_rotor() as a free operator function
- Update algebra/__init__.py: export word_transition_rotor
- Refactor vocab/manifold.py: remove edge_rotor(), add versor grade-norm
invariant check in add() to reject raw coordinate vectors at insertion time
VocabManifold now stores only algebraically valid Cl(4,1) versors and
exposes only relational lookup (CGA inner product). Rotor construction
is a contextual algebra-layer concern, not a vocabulary property.
