LUME Chain 1 — Echelon Layer 4 + 128D Temporal Closure

**Status:** RELEASED (plan + patches ready to apply, live verification pending) **Subject:** Close the body-time loop in MotionMix Echelon **Started:** 2026-05-08 **Released:** 2026-05-08 **Chain owner:** Mohamed **Execution model:** META:OMEGA + META:HYDRA collapsed (single pass), 8-lens reviewed This release bundles a VALIDATED PLAN + READY-TO-APPLY PATCHES for closing the body-time loop in the MotionMix Echelon engine. It does NOT contain a fully shipped + verified live system. Live verification is gated on Codex / Mohamed applying the patches on Mac4 + running the live test on iPhone 16. 1. `state.phase` is never written by `SimpleLatentUpdater`. Source: `cc-brain/src/latent/simple.rs:166-178`. Slot [70] of the 128D vector is dead-zero. 2. Backend enum dispatch is INVERTED between Swift and Rust. Source: `EchelonBridge.swift:62-65` (Swift declares `simple=0, learned=1, dell=2`) vs `cc-brain/src/ffi.rs:348-351` (Rust dispatches `1 => DELL, _ => Simple`). `Backend.learned` makes a DELL core. `LearnedLatentUpdater` is unreachable from iOS. 3. EchelonBridge slot index mismatch. Source: `EchelonBridge.swift:397-404` (`getTemporalState` reads `[69, 70, 71]` as `(tempo, confidence, phase)` but Rust writes `(tempo, phase, periodicity)` per `san/mod.rs:85-87`). Plus one architectural module (`TemporalIntegrator`) and one supporting module (`PocketFFT`) are needed to give the system a single source of truth for body-time. | # | Criterion | Verification status | |---|-----------|---------------------| | 1 | 128D[70] state.phase non-zero during body motion | **PATCH READY** (`patches/phase-2/01-state-phase-population.patch` writes phase from autocorrelation + dt-aware advancement). Live verification BLOCKED on patch application + on-device run. | | 2 | iOS default path uses LearnedLatentUpdater (with safe fallback) | **PATCH READY** (`patches/phase-3/01-rust-backend-enum-fix.patch` + `patches/phase-3/03-default-path-swap.patch`). Backend enum fix is independent and ships first; default-path swap gated behind `simple-default` cargo feature for instant rollback. Live verification BLOCKED on patch application + iOS rebuild. | | 3 | Body-driven audio output verified live | **BLOCKED on live capture** (Mac4 + iPhone 16 + ShootView rig). Patches do not address this gate; this is a human-in-loop verification per Lens 6 E-3. | | 4 | No DELL 150 BPM imposition | **DEFERRED to Phase 5** (intentionally not in this collapsed run; bar-event queue from Phase 2 is the prerequisite, and the Phase 5 patch consumes it). | | 5 (added by Excavation) | EchelonBridge `getTemporalState` reads slots in correct order | **PATCH READY** (`patches/phase-2/05-swift-bridge-temporal-state.patch` switches Swift to the explicit `echelon_get_temporal_state` FFI which returns `(tempo, con