Changelog

All notable changes to this project will be documented in this file.

The format is based on Keep a Changelog and this project adheres to Semantic Versioning.

Unreleased

converge-perturb crate: four fault operators (ei_scale, spike_jitter, gain, prune) on a uniform severity axis, five invariants checked against an unperturbed baseline, and a sweep that reports the severity at first violation
converge perturb command with --out, --steps, --bisect and --operators
docs/perturbation.md
examples/envelope.cv, a network with sustained activity in both layers for fault sweeps
Public elaborate and run in converge-sim, so a pass can perturb a network between them
Per-layer spike counts bucketed into 16 windows, and a non-finite membrane counter
Voltage as a unit kind (V, mV, uV) with the volt as the canonical membrane unit
Golden tests pinning CVIR output byte for byte

LIF update applied the leak to charge arriving in the same step, so a unit input could never reach a unit threshold. examples/poisson.cv simulated to zero spikes
Zero-delay synapses were delivered queue_len steps late instead of one, and queue_len depends on the longest delay anywhere in the network. Delays now floor at one step
Off-grid delays were a hard error, which made Normal and Uniform delay distributions unusable and left examples/hello.cv unsimulatable. They round to the nearest step and the coercion is reported in the summary
v_th read its unit and discarded it, so 1.0 V and 1.0 mV were the same threshold
tau_m being a time and w being well formed were unchecked in the front end
Unknown neuron and connect body keys were silently ignored
The RNG stored the seed as its state, so the default seed 0 produced exactly 0.0 as its first draw. Replaced with SplitMix64 and per-site streams
Box-Muller could take ln(0), putting an infinity into a weight or a delay
A run whose step exceeds tau_m is refused instead of flipping the membrane sign each step

Simulator spike counts moved once, from the LIF ordering and RNG fixes above, and are now pinned by tests
SimSummary gained windows, nonfinite and delay_quantization. CVIR is unchanged