Changelog

Exposed validated gyrokinetic-to-UPDE coupling gains, added graceful phase-stream shutdown, and split evidence validation, transport geometry, runtime sanitisation, multi-ion evolution, auxiliary heating, and anomalous transport into explicit modules while preserving the existing CLI and numerical contracts. Current generated inventory: 196 source modules, 64 Rust modules, 155 validation scripts, and 546 Python test files.

Added a libFuzzer harness for the Rust parser, numeric-adapter, and FFI surfaces (reactor-configuration JSON, VMEC-like and BOUT++ text parsers, the capacitor-bank discharge ledger, and the Kuramoto phase kernel), with a fail-closed campaign orchestrator, a tracked seed corpus, and a nightly fuzzing workflow separate from per-commit CI. Added a polyglot benchmark regression gate that records per-language p50/p95/p99 latency, throughput, and run provenance and fails closed on tampered reports, missing metrics, or cross-CPU comparisons. Added a runtime-bound formal safety certificate that binds a holding bounded CTL/LTL certificate to a structured controller runtime identity (controller configuration, Petri-net topology digest, SNN parameters, solver mode, and a declared timing envelope) — issuance, proof replay, and facility-facing admission all fail closed unless the binding re-proves on the declared stack. Fixed an overflow in the Rust matrix-exponential scaling-and-squaring exponent that could stall the capacitor-bank discharge (it now fails closed on a non-finite norm). Capability inventory: 146 Python modules, 64 Rust source files, 8,215 tests.

Validated the Kuramoto phase-synchronisation runtime against published results, the Grad-Shafranov equilibrium solver against the Solov'ev exact solution, and the structured-singular-value (μ) computation against exact μ references. Capability inventory: 145 Python modules, 64 Rust source files, 6,257 tests.

Reworked the README, documentation landing page, onboarding guide, use-case page, and tutorials; regenerated the capability manifest and README snapshot from the current tree. Patch series v0.20.1–v0.20.7 followed with incremental physics and packaging fixes.

Major audit release. 33 equation corrections across GS solver, MHD stability criteria, neoclassical transport, and edge models. All implementations verified against original publications. 3,300+ tests, 100% line coverage. Sauter bootstrap current coefficients corrected. Mercier criterion sign convention fixed. Ballooning eigenvalue boundary conditions revised. L-H Martin 2008 exponents verified.

5D Vlasov equation solver for nonlinear δf gyrokinetics. Orszag 2/3 dealiasing rule. Dimits shift verified against GS2/GENE reference. Zonal flow generation and saturation. 53 new tests covering convergence, conservation laws, and benchmark cases.

Gyrokinetic transport reorganised into three-path system: critical-gradient (fast), QLKNN surrogate (medium), native eigenvalue (accurate). Licence changed from MIT to AGPL-3.0. 163 new tests. SAT0/SAT1/SAT2 saturation models for TGLF-equivalent tier.

H∞ and μ-synthesis controllers. Sliding-mode vertical stability. Fault-tolerant control with innovation monitoring. EPED pedestal model. SOL two-point model. MARFE radiation collapse. NTM Modified Rutherford equation. Tearing and locked mode physics. ELM peeling-ballooning boundary.

PPO reinforcement learning agent trained for 500K steps on Vertex AI T4. Gymnasium-compatible tokamak environment. Reward 143.7 vs MPC 58.1 vs PID -912.3. 0% disruption rate over 100 evaluation episodes. Checkpoint export and inference-only mode.

Full GS equilibrium solve under JAX autodiff. JIT compilation. GPU support. Gradient through complete equilibrium reconstruction. Neural PCA+MLP surrogate (1000× speedup). Enables gradient-based plasma shape optimisation.

QLKNN-10D neural network surrogate for gyrokinetic transport (ion + electron channels). PPO agent initial implementation with basic tokamak environment. MPC controller with 20-step horizon. Digital twin framework foundation.