{
  "step": "C306",
  "date": "2026-09-24",
  "status": "completed",
  "title": "Admitted selector alternatives and exact phases",
  "previous_certificate_sha256": "4604dc739fd0fd5dab0d3673c865f226c11e151cb8ea399794048a55a3a36288",
  "source_manifest_sha256": "0007bfd7665fc8b32dca56a9c3688870bdd5ab8eda31acaebcd15d03753f1587",
  "step_sha256": "1749c371ec3fd83d62ad1dece8658b9cf06c48fd96db8631aae05050bbe44ac5",
  "report_sha256": "93c03a6941b072db66a30a59609b7a1e793eb010da45ce43d9ffb14493887f8f",
  "checkpoint_sha256": "f7cb4a45c061ab547829b32ad2068d98f139768c8ed00a23235ca0772c1aca44",
  "results_sha256": "c2d2194fb46422b2c0967534205269d4aac7e0b941ce782ad354fb29587546bb",
  "data_sha256": "500747efa31b3e9234255716134bed0e98b4c622c461b27a632b153d651fd3ea",
  "calculation_sha256": "62a9072f9142c2ff013c74320aa184203f955fda8132c724c46414e517ecf2bb",
  "verifier_sha256": "1b0d77f7bd90c94c014bf13467830ac053579a4ca021d6d777d8442441f73259",
  "review_sha256": "9f3bad5f6219633ee515f8a6caf93b9323cd72779ec84fcee175206237b2ca6b",
  "replay_sha256": "502ba56f3a707ef4efff8ae8da72fa97c56085235754e24c16a5fe0ffca69a6b",
  "control_integrity_sha256": "41aee61f77fbc03abaf36ac516ed70de5eb5b9e3532ea9adcb9d26b0eeb3b797",
  "next_step_decision_sha256": "759105636cf2e86324fc2d57824dcc4ac3f19db729c3d3370b1f92052a045b75",
  "assertions_passed": 19,
  "source_checks_passed": 8,
  "frozen_inputs": 6,
  "main_result": "All four admitted600 selector alternatives change one fixed interface by±1; actual phase components do not give600 for either jointly fixed pair.",
  "limits": [
    "Alternative source-admitted selectors change a premise even when endpoints are close.",
    "The phase audit does not permit arbitrary seasonal reattachment of the fixed anchors.",
    "No new axis, bridge or annual center is adopted."
  ],
  "canonical_or_graph_edits": false,
  "new_independent_agent_review": false,
  "next_proposed_step": "C307: Derive a typed affine normal form for the joint source relations, separating dependent equalities, context conversions and phase actions.",
  "next_step_executed": false
}