anofox-forecast-backtest SKILL.md skillA
anofox-forecast-backtest from datazoode/anofox-forecast is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add datazoode/anofox-forecast/anofox-forecast-backtest@v2026.09.26Pins v2026.09.26 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- datazoode/anofox-forecast
- Path
plugins/anofox-forecast/skills/anofox-forecast-backtest/SKILL.md- Versions recorded
- 13
- Latest version
- v2026.09.26, committed Oct 28, 2026
- First version recorded
- Sep 18, 2026
- Size
- 18,889 bytes
- Repository stars
- 45
- License
- a license file GitHub does not identify
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.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Anofox Forecast — Backtesting, CV, Metrics & Conformal Cheat Sheet **Extension:** `anofox_forecast` v2026.09.26 (Rust crate `anofox-forecast` v0.16.2) | **DuckDB:** v2.0.0 / v1.5.6 | **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**, along with the orphaned internal `_ts_backtest_native` table function that backed it (Phase 12 D-07). Use the two-step CV workflow (`ts_cv_folds_by` → `ts_cv_forecast_by`) instead. - **Metric `_by` table macros are deprecated.** They're ~2400× slower than the scalar + `GROUP BY` pattern and don't parallelise. Use scalars. If you do use them, their results don't depend on `source` row order or on `source` being a UNION ALL (#285 fixed), so no pre-sorting (and no `SET threads = 1`) is needed, for `ts_mase_by` too. 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… …
Read the whole file at its exact version.
How to install
mdr add datazoode/anofox-forecast/anofox-forecast-backtest@sha256:5bf539f4abf328daThe line at the top of this page pins the label v2026.09.26, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_fnknmjg4x5yti3tb)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 13 versions of this file, between Sep 18, 2026 and Oct 28, 2026, about one every 3 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2026.09.26 latest | 2026-10-28 | 4b7f4de | 18,889 B | A | view · diff |
| v2026.09.26 | 2026-10-28 | eeb26da | 18,087 B | A | view · diff |
| v2026.09.26 | 2026-10-28 | fdff432 | 18,100 B | A | view · diff |
| v2026.09.26 | 2026-10-28 | f069d0e | 17,844 B | A | view · diff |
| v2026.09.26 | 2026-10-23 | 73f01b4 | 17,012 B | A | view · diff |
| v2026.09.26 | 2026-10-22 | 7f33142 | 16,818 B | A | view · diff |
| v2026.09.26 | 2026-10-16 | 3a62628 | 16,810 B | A | view · diff |
| v2026.09.26 | 2026-10-15 | 2cbb500 | 16,802 B | A | view · diff |
| v2026.09.26 | 2026-10-15 | 12b3642 | 16,802 B | A | view · diff |
| v2026.09.26 | 2026-10-14 | c49016e | 15,619 B | A | view · diff |
| v2026.09.26 | 2026-10-10 | 87e6f99 | 14,111 B | A | view · diff |
| v0.15.3 | 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
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (18889 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- 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
- pass: No link to a raw IP address
- pass: No script tag
Source
datazoode/anofox-forecast · 45 stars · license a license file GitHub does not identify · pushed 2026-10-31 · 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/5bf539f4abf328daf96fed9093464132be5be873909a814eb0dbabfe51fb184a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.