anofox-forecast-backtest skillA
anofox-forecast-backtest is agent-read markdown (skill) from datazoode/anofox-forecast: Backtesting, cross-validation, evaluation metrics, and conformal prediction intervals for the anofox_forecast DuckDB extension. Use when evaluating forecast accuracy, comparing models with time-series-aware CV, computing metrics (MAE / RMSE / MAPE / MASE / coverage), or attaching distribution-free prediction intervals to forecasts..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# Anofox Forecast — Backtesting, CV, Metrics & Conformal Cheat Sheet **Extension:** `anofox_forecast` v0.15.3 | **DuckDB:** v1.4.5 LTS / v1.5.4+ | **Dual naming:** `ts_*` and `anofox_fcst_ts_*` Time-series-aware cross-validation, error metrics, and distribution-free intervals. ## Critical gotchas - **`ts_backtest_auto_by` was REMOVED.** Use the two-step CV workflow (`ts_cv_folds_by` → `ts_cv_forecast_by`) instead. Older docs and tests may still reference the retired one-liner. - **Metric `_by` table macros are deprecated.** They're ~2400× slower than the scalar + `GROUP BY` pattern and don't parallelise. Use scalars. The full deprecated family: `ts_mae_by`, `ts_rmse_by`, `ts_mse_by`, `ts_mape_by`, `ts_smape_by`, `ts_bias_by`, `ts_mase_by`, `ts_rmae_by`, `ts_r2_by`, `ts_coverage_by`, `ts_quantile_loss_by`, `ts_interval_width_by`. Each maps to a scalar (`ts_mae`, `ts_rmse`, … below) called under `GROUP BY`. Two helpers are exceptions: `ts_interval_width_by` is a table macro `(results, group_col, lower_col, upper_col)` and `ts_mean_interval_width(DOUBLE[] lower, DOUBLE[] upper) → DOUBLE` is a **scalar** — still prefer the scalar + `GROUP BY` pattern over the `_by` table macro. …
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How to install
mdr add datazoode/anofox-forecast/anofox-forecast-backtest@v0.15.3mdr add datazoode/anofox-forecast/anofox-forecast-backtest@sha256:6855b6153353b795Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_fnknmjg4x5yti3tb)
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Versions
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v0.15.3 latest | 2026-09-18 | 7e23980 | 11,660 B | A | view · diff |
| v0.15.3 | 2026-09-18 | e2d0889 | 9,805 B | A | view |
Audit of the latest version
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- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (11660 bytes)
- pass: No zero-width or bidi control characters
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- pass: No instruction to send local credentials anywhere
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- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
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Source
datazoode/anofox-forecast · 39 stars · license NOASSERTION · pushed 2026-09-18 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fnknmjg4x5yti3tb GET https://markdownregistry.com/api/v1/resolve?ref=datazoode/anofox-forecast/anofox-forecast-backtest GET https://markdownregistry.com/api/v1/blob/6855b6153353b795c3a611f24764b5442c03a2a0f4318c9b0aa0085a82cd66be
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