{"version":"2026.03-browser-manifest-v2","benchmarkGenerationId":"2026.03-browser-benchmark-v2","benchmarkSpecVersion":"2026.03-browser-benchmark-v2","promptBundleVersion":"2026.03-reference-lm-prompts-v1","scoreVersion":"2026.03-browser-v6","releaseTimestamp":"2026-03-13T00:00:00.000Z","documentPath":"/benchmark-spec/v2.md","changelogEntry":{"manifestVersion":"2026.03-browser-manifest-v2","releaseTimestamp":"2026-03-13T00:00:00.000Z","summary":"Adds deterministic WebGPU fallback lineage, adapter-class telemetry, and degraded-path confidence guardrails to the active benchmark release.","changes":["Records adapter-class capability telemetry, required feature misses, and deterministic WebGPU to WASM fallback traces in benchmark metadata and telemetry exports.","Publishes fallback success and completion-regression SLO expectations for the internal reliability surfaces that monitor degraded benchmark paths.","Blocks high-confidence shortlist guidance when only degraded fallback evidence is available and paired/native evidence remains weak."]}}