Immutable source snapshot

browser-local-cm5-v1 snapshot

CM-5 browser integration v1; browser helper remains three plies, not the live seven-ply helper, derived from the validated desktop WebGPU prototype. FP32 export of checkpoint c0a3f67ac4b364276028950b2010c5644e03efb3ca0f1228b32c36b8b5340238; model ONNX SHA-256 f453044633683745fb519bd28d7f5174990f05c3329e072c17906938d827e13d. These are the exact integrated original frontend/policy/worker/runner files; third-party dependencies are separately licensed. ONNX Runtime Web 1.24.3 and chess.js 1.4.0. Website bundling changes paths and presentation but preserves model-scoring code. This source subset omits the exporter, which remains part of the recorded prototype validation, and is not a standalone build bundle. Device-dependent mate-helper budget may change overrides. No GPU memory or universal performance guarantee.