d64adc14f5
Eliminates the f64→f32 cudarc ABI trap (feedback_cudarc_f64_f32_abi.md, task #82) at the type level: hyperparameters consumed by CUDA kernels now live as f32 in Rust, cast once at the TOML/PSO ingest boundary instead of at every kernel call site. Structs changed: - DQNHyperparameters (crates/ml/src/trainers/dqn/config.rs) — ~85 scalar fields migrated from f64 → f32. Covers all kernel-facing scalars: reward weights (w_pnl/w_dd/w_idle, dd_threshold, cea_weight, micro_reward_*, price_confirm_weight, book_aggression_weight, hold_quality_weight), exploration (epsilon_* and the 4 branch mults, noisy_sigma_*, count_bonus, noise_sigma, q_gap_threshold), distributional RL (v_min, v_max, reward_scale, iqn_lambda, qr_kappa, spectral_*, gradient_collapse_multiplier), fill simulation (5 fill_* fields), risk/Kelly (kelly_fractional, kelly_max_fraction, max_leverage, max_position_absolute, minimum_profit_factor), ensemble/curiosity (curiosity_weight, curiosity_q_penalty_lambda, ensemble_*, beta_*, variance_cap), anti-LR (anti_lr_*, adversarial_dd_threshold, beta_penalty_strength), walk-forward (wf_*), experience (avg_spread, transaction_cost_multiplier, holding_cost_rate, churn_penalty_scale, contract_multiplier, margin_pct, tick_size, bars_per_day, cash_reserve_percent), misc kernel scalars (gamma, tau, huber_delta, q_clip_*, shrink_perturb_*, regime_replay_decay, per_alpha, per_beta_start, dt_target_return, etc.). Also `noisy_epsilon_floor: Option<f32>` and `count_bonus_coefficient: Option<f32>`. - `computed_v_min` / `computed_v_max` now return f32. - `compute_max_position` returns f32 (f64 internally for the notional division). Fields preserved as f64 (precision-sensitive, NOT kernel-facing scalars — per task spec and feedback_cudarc_f64_f32_abi.md): - `learning_rate` — tested at 1e-10 tolerance; f32 rounds to 2e-12 for a 1e-5 LR. - `entropy_coefficient` — tested at 1e-9 tolerance. - `weight_decay` — tiny 1e-5..1e-3 range. - `adam_epsilon` — 1e-8 default; f32 preserves denorms here but paired with weight_decay/learning_rate for symmetry. - `gradient_clip_norm: Option<f64>` — grad norms are f64 accumulators by project convention. - `min_loss_improvement_pct`, `q_value_floor` — early-stopping long-horizon stats. - `cql_alpha` — flows into DQNConfig (ml-dqn) still f64. - `min_learning_rate`, `lr_min` — paired with learning_rate. - Family intensity scalars (6 `*_intensity` fields) — f64 PSO search space; the intensity applies via `as f32` at each call site in `apply_family_scaling`. No checkpoint format change: DQNHyperparameters has `#[derive(Debug, Clone)]` only (not Serialize/Deserialize), so the TOML-ingest path is the only serde boundary and already casts explicitly via `hp.field = v as f32;` in `DqnTrainingProfile::apply_to`. PSO hyperopt bounds stay f64 in `SearchSpaceSection` and cast at the adapter boundary. Call-site impact: - ~30 `as f32` casts removed from hot paths (fused_training FusedConfig builder, training_loop kernel launches, constructor DQNConfig builder, action.rs GPU action selector, trainer/mod.rs WF config). Kernels now receive the hp field directly via `&hp.x`. - ~75 `as f32` casts added at the `apply_to` / hyperopt-adapter ingest boundary — the single conversion point. - Cross-crate contracts (DQNConfig in ml-dqn, PortfolioTracker in ml-core, GAECalculator, DropoutScheduler, NoisySigmaScheduler, KellyOptimizerConfig, RewardConfig) retain their f64 signatures; ml calls cast at the boundary with `f64::from(hp.x)` so the contract is explicit and greppable. Two test-side adjustments: - `test_kelly_fields_are_public` now asserts `f32` for kelly_fractional / kelly_max_fraction (these migrated). - `test_early_stopping_termination` uses `f64::from(...)` to preserve the f64 threshold computation against the now-f32 `gradient_collapse_multiplier`. Verified: - `SQLX_OFFLINE=true CARGO_INCREMENTAL=0 RUSTC_WRAPPER=sccache cargo check --workspace` — clean, zero new warnings. - `cargo check --workspace --tests` — clean. - `cargo test -p ml --lib training_profile::tests` — all 18 migrated tests pass. The one pre-existing failure (`test_production_profile_applies_all_sections` n_steps mismatch, 1 vs 5) reproduces on stashed baseline, so it is unrelated to this change. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Foxhunt
Production HFT trading system in Rust.
Architecture
The workspace contains 32 crates organized as follows:
Core Libraries (16)
| Crate | Purpose |
|---|---|
trading_engine |
Order processing, FIX 4.4, IB TWS, SIMD, RDTSC timing |
risk |
VaR, Kelly, circuit breakers, kill switches, compliance |
risk-data |
Risk data types and shared structures |
trading-data |
Trading data types |
ml |
DQN Rainbow, PPO, TFT, Mamba2, ensemble inference |
ml-data |
ML data types and feature definitions |
data |
Market data ingestion and storage |
backtesting |
Replay engine, strategy tester |
adaptive-strategy |
Ensemble execution, microstructure analysis |
common |
Shared types, resilience, error handling |
storage |
S3 and local model storage |
model_loader |
Model serialization and loading |
market-data |
Market data feed handlers |
database |
PostgreSQL access layer (SQLx) |
config |
Configuration management |
tli |
CLI commands and tooling |
Services (8)
| Service | Purpose |
|---|---|
backtesting_service |
gRPC backtesting service |
broker_gateway_service |
FIX routing, broker connectivity |
trading_service |
Core trading operations |
ml_training_service |
Model training orchestration |
data_acquisition_service |
Market data acquisition |
trading_agent_service |
Autonomous trading agents |
api_gateway |
gRPC API gateway with auth |
web-gateway |
Axum REST + WebSocket gateway |
Frontend
web-dashboard/ -- React 19 + TypeScript + Vite + TradingView charts.
Building
# Check compilation (no PostgreSQL required)
SQLX_OFFLINE=true cargo check --workspace
# Run tests for a specific crate
SQLX_OFFLINE=true cargo test -p <crate> --lib
# Clippy
SQLX_OFFLINE=true cargo clippy --workspace
ML Models
Four production model architectures on Candle v0.9.1 with CUDA:
- DQN Rainbow -- Deep Q-Network with prioritized replay, dueling heads, noisy nets
- PPO -- Proximal Policy Optimization with GAE and LSTM policies
- TFT -- Temporal Fusion Transformer for multi-horizon forecasting
- Mamba2 -- State space model for sequence prediction
Each model has a standalone trainer and a UnifiedTrainable adapter for the hyperopt pipeline.
Infrastructure
- Git: Gitea at
git.fxhnt.ai(Tailscale-only), Scaleway DEV1-S - Observability: OpenTelemetry OTLP (env
OTEL_EXPORTER_OTLP_ENDPOINT) - Database: PostgreSQL with SQLx offline mode for CI
License
Proprietary. All rights reserved.