Feat/beat envelope transform - #2
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A stateful route transform that turns a rising-edge trigger into a decaying gain envelope: on each edge (input crossing `threshold`) the output snaps to `peak` and relaxes toward `floor` with a time constant that is either fixed (`tau_ms`) or auto-scaled from the measured inter-beat interval (`tau_ratio`, default 0.3 — matching the cymatic-control HEARTBEAT_PULSE `0.3·60/bpm`). A `min_interval_ms` refractory guard rejects double-fires. Why: the Latido heartbeat currently uses a `gate rising_edge`, which lifts the master gain for a single evaluation — a flash. beat_envelope makes it *breathe*: each ECG beat swells the field and decays, phase-locked to the heart, without needing the bpm channel (it measures the interval itself). How: - compiler.py: allow-list + compile validation (floor < peak, positive tau/tau_ratio) + output range propagated as [floor, peak]; stateful runtime in evaluate_route with per-transform state on RouteRuntime.beat_state (value/beat_us/eval_us/last_in/tau_ms). Decay uses now_us deltas (deterministic, like smoothing/phase_accumulator); edge detection prevents re-firing on a sustained-high input. Tests: tests/test_beat_envelope.py (8) — compile/range, edge→peak, tau decay, no-refire-while-held, refractory, tau auto-scale from interval, floor/peak bounds. Full suite: 65 passed, 2 skipped (test_harmocap_driver.py collection error is the pre-existing hardcoded ~/Projects path). Docs: CORE_DESIGN.md transform table + stateful-transform note. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
…ansform # Conflicts: # docs/CORE_DESIGN.md # src/harmonic_weaver/engine/compiler.py
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What
Adds a stateful route transform,
beat_envelope, that turns a rising-edgetrigger into a decaying gain envelope. On each edge (input crossing
threshold)the output snaps to
peakand relaxes towardfloor.{ "type": "beat_envelope", "peak": 1.0, "floor": 0.8, "tau_ratio": 0.3, "min_interval_ms": 300.0 } Why The Latido heartbeat route used a gate rising_edge, which lifts master gain for a single evaluation — a flash. beat_envelope makes it breathe: each ECG beat swells the field and decays, phase-locked to the heart. The time constant auto-scales from the measured inter-beat interval (tau_ratio 0.3, matching cymatic-control's HEARTBEAT_PULSE 0.3·60/bpm), so it needs no bpm channel. How - compiler.py: allow-list + compile validation (floor < peak, positive tau/tau_ratio) + output range propagated as [floor, peak]; stateful runtime in evaluate_route with per-transform state on RouteRuntime.beat_state (value/beat_us/eval_us/last_in/tau_ms). Decay uses now_us deltas (deterministic, like smoothing/phase_accumulator); edge detection prevents re-firing on a sustained-high input. A min_interval_ms refractory guard rejects double-fires. Tests tests/test_beat_envelope.py (8): compile/range, edge→peak, tau decay, no-refire-while-held, refractory, tau auto-scale from interval, floor/peak bounds. Branch is merged up to date with main; the full combined suite passes: 82 passed, 2 skipped — beat_envelope, slew_limiter, and derivative all coexist. (The test_harmocap_driver.py collection error is a pre-existing hardcoded ~/Projects/HarMoCAP path, unrelated to this change.) Docs CORE_DESIGN.md transform table + stateful-transform note.