"""Fixed protocol, constants frozen before any new cross-layer measurements."""
from itertools import combinations

LAYERS=[3,7,11,15,19,23]
PAIRS=list(combinations(LAYERS,2))
TIERS={
 'strict':{'output_error':.05,'output_cosine':.99,'js':.01,'js_p95':.05,'top5':.8,'value_error':.05,'value_cosine':.99},
 'approximate':{'output_error':.20,'output_cosine':.98,'js':.05,'js_p95':.15,'top5':.6,'value_error':.20,'value_cosine':.98}}
PROTOCOL={'layers':LAYERS,'layer_pairs':PAIRS,'heads':8,'kv_heads':2,'head_dim':256,
 'calibration_samples':['cal-zh-1','cal-zh-2','cal-en-1','cal-en-2'],
 'validation_samples':['test-zh-1','test-zh-2','test-en-1','test-en-2'],
 'fresh_test_file':'crossqkv/fresh_samples.json','fresh_test_count':4,'tokens_per_text':32,
 'query_positions_for_primary_metrics':list(range(7,32)),
 'candidate_types':['full_attention','qkv_head','qk_map','qk_head','v_group'],
 'discrete_head_matching':'Exact 8-head minimum mean-JS bijection, two source-layer calibration input distributions; frozen before validation; P injection only',
 'continuous_alignment':False,'training':False,'scale_fitting':False,'gpu':False,'cost_required':False,
 'tiers':TIERS,'max_qk_head_output_candidates':32,'max_v_group_output_candidates':16,
 'all_qk_map_output_candidates':30,'max_final_candidate':1,
 'selection':'strict before approximate; type priority full_attention/qkv_head/qk_map/qk_head/v_group; then worst output error, JS, ID; no validation-driven fallback',
 'head_output_activity_floor':'max(1e-6, 0.1 * within-layer median head RMS) for every calibration/validation/test text',
 'fresh_test_run_only_if_frozen_candidate_passes_validation':True,
 'network_interventions':'two same-input donor-function substitution directions; plus one earlier-to-later actual cached-state reuse test reported separately',
 'network_quality':{'mean_token_nll_delta_max':.01,'per_text_p95_nll_delta_max':.05},
 'retention':'all weights and caches retained until explicit user deletion request',
 'seconds':7200,'controls':['identity','uniform causal P','seeded within-causal-row key shuffle','first-key ablation','self/recent3 mass','value Gram to input','value Gram of two seeded Gaussian projections'],
 'positional_repeat_labels':{'sink_dominated':.90,'self_dominated':.90,'recent3_dominated':.90},
 'limitations':['Old validation texts were used in prior experiments; four fresh texts are reserved for this new goal',
 'Direct V-coordinate disagreement does not disprove V/O functional equivalence; centered value Gram CKA is diagnostic only',
 'Arbitrary P-head assignment does not authorize arbitrary GQA KV-weight permutation',
 'Short text-only pilot does not establish broad task equivalence or linear-attention reuse']}