Lookahead Bias Python Packages

traceguard

Point-in-time correct LLM instrumentation — tracing, version pinning and look-ahead-bias protection for research pipelines. pip install traceguard

backtest-integrity-guard

Dependency-free Python CLI for auditing OHLCV integrity, look-ahead/execution timing, same-bar ambiguity, and frozen research inputs.

lacuna-quant

Open-source quantitative research validation for finding where alpha breaks.

walkforward

Volatility forecasts, position sizing and purged walk-forward splits that never see the future. C11 core, numpy and scikit-learn front door.

tradevodata

Point-in-time US equity fundamentals from SEC EDGAR — as_of is a required argument, so lookahead bias is impossible to write by accident

leakguard-mcp

Squawk for backtests — static analyzer flagging lookahead bias & data leakage in ML/trading code before the backtest runs. Local stdio MCP.

pit-release-gate

Screen quant/ML feature pipelines for look-ahead bias from late-arriving data: measure each signal's leakage susceptibility and gate release until the cross-section is safe. Python, MIT.

lacuna-options

Open-source quantitative research validation for finding where alpha breaks.

alphaagent-quant

Multi-agent stock & crypto screening with leakage-aware (point-in-time) LLM evaluation and an honest, mechanical backtest.

lookahead-lint

Static analyzer that flags look-ahead bias and target leakage in pandas research code. Stdlib only, zero runtime dependencies.

nullius

Falsify-first backtest diagnostics: lookahead detection, skill placebos, honest forecast evaluation, and multiple-testing deflation. In development.