concept-drift-vs-staleness-differentiation SKILL.md skillA
concept-drift-vs-staleness-differentiation from himanshuj16/algo-trading-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add himanshuj16/algo-trading-skills/concept-drift-vs-staleness-differentiation@v2.0.0Pins v2.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- himanshuj16/algo-trading-skills
- Path
skills/concept-drift-vs-staleness-differentiation/SKILL.md- Versions recorded
- 5
- Latest version
- v2.0.0, committed Sep 3, 2026
- First version recorded
- Jul 26, 2026
- Size
- 9,863 bytes
- Repository stars
- 50
- License
- Apache-2.0
Use when a live signal degrades and you must decide what to fix, separating concept drift in the conditional relationship, covariate shift in the feature distribution, and plain data staleness, since each calls for a different remedy.
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
## When to Use Use this skill when a live ML trading signal's predictive performance ($R^2$, directional accuracy, Sharpe) degrades and you must decide **what to fix** before you spend anything fixing it. The three plausible root causes call for three different, mutually exclusive remediations: | Root cause | What changed | Remediation | |---|---|---| | `DATA_STALENESS` | Nothing about the market. The feature pipeline is replaying old values. | Fix the pipeline. **Do not retrain** — the model has not been shown to be at fault. | | `COVARIATE_SHIFT` | $P(X)$ moved; $P(Y \mid X)$ intact. The model is extrapolating. | Refit on the updated input distribution. | | `CONCEPT_DRIFT` | $P(Y \mid X)$ itself moved. The alpha decayed. | Re-specify features, shorten the lookback, or retire the strategy. Refitting the same feature set rarely recovers the edge. | Terminology follows Moreno-Torres et al. (2012) — see `references/standards.md`. ## When NOT to Use - **As a kill switch.** This returns a classification, not an action. Halting the strategy, cancelling working orders and flattening positions belong to `kill-switch-and-drawdown-circuit-breakers`. …
Read the whole file at its exact version.
How to install
mdr add himanshuj16/algo-trading-skills/concept-drift-vs-staleness-differentiation@sha256:6387d7eb4d615a82The line at the top of this page pins the label v2.0.0, 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_fnmaxy6ssrwiy6se)
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Versions
The registry has recorded 5 versions of this file, between Jul 26, 2026 and Sep 3, 2026, about one every 10 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.0 latest | 2026-09-03 | 8527a51 | 9,863 B | A | view · diff |
| v2.0.0 | 2026-08-22 | 3ed130d | 9,829 B | A | view · diff |
| v1.0.0 | 2026-08-07 | 89d1436 | 3,862 B | A | view · diff |
| v1.0.0 | 2026-07-30 | dfc60c7 | 3,862 B | A | view · diff |
| v1.0.0 | 2026-07-26 | 0100af1 | 3,877 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 (9863 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
himanshuj16/algo-trading-skills · 50 stars · license Apache-2.0 · pushed 2026-09-14 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fnmaxy6ssrwiy6se GET https://markdownregistry.com/api/v1/resolve?ref=himanshuj16/algo-trading-skills/concept-drift-vs-staleness-differentiation GET https://markdownregistry.com/api/v1/blob/6387d7eb4d615a82d4f3557ccadc8282ba4659a189afe9a369c4e510fda07947
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.