backtest-determinism-and-reproducibility SKILL.md skillA
backtest-determinism-and-reproducibility 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/backtest-determinism-and-reproducibility@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/backtest-determinism-and-reproducibility/SKILL.md- Versions recorded
- 5
- Latest version
- v2.0.0, committed Sep 3, 2026
- First version recorded
- Jul 30, 2026
- Size
- 7,790 bytes
- Repository stars
- 50
- License
- Apache-2.0
Use when identical backtest code and data produce different P&L or Sharpe across runs, making optimisation untrustworthy: deterministic seeding, strict input sort order, a simulated clock replacing wall-clock reads, and run-to-run divergence detection.
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 Invoke this skill when building backtest simulation engines or CI regression suites. If backtest runs produce varying P&L curves or Sharpe ratios across identical code and data, parameter optimization becomes impossible to trust — you cannot tell an improvement from noise. Non-determinism comes from unseeded RNGs, set iteration order, unordered event streams, wall-clock reads, and floating-point accumulation order. ## What This Can and Cannot Guarantee **It cannot guarantee bit-identical results in general, and no tool can.** PyTorch's reproducibility guidance states plainly that "completely reproducible results are not guaranteed across PyTorch releases, individual commits, or different platforms," and that results may differ between CPU and GPU "even when using identical seeds." The same holds for BLAS thread counts, SIMD code paths, and library versions. Determinism is a property of a **pinned environment** — same platform, same library versions, same thread configuration. This skill does two things within that envelope: 1. **Eliminates the controllable sources**: seeding, event ordering, clock reads. …
Read the whole file at its exact version.
How to install
mdr add himanshuj16/algo-trading-skills/backtest-determinism-and-reproducibility@sha256:18abbeaf1c3a9a9aThe 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_gknvpcvflepgbd3b)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Jul 30, 2026 and Sep 3, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| v2.0.0 latest | 2026-09-03 | 8527a51 | 7,790 B | A | view · diff |
| v2.0.0 | 2026-09-03 | 64e8b01 | 7,761 B | A | view · diff |
| v2.0.0 | 2026-08-13 | 097e217 | 7,720 B | A | view · diff |
| v1.0.0 | 2026-08-07 | 89d1436 | 3,236 B | A | view · diff |
| v1.0 | 2026-07-30 | dfc60c7 | 3,234 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 (7790 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_gknvpcvflepgbd3b GET https://markdownregistry.com/api/v1/resolve?ref=himanshuj16/algo-trading-skills/backtest-determinism-and-reproducibility GET https://markdownregistry.com/api/v1/blob/18abbeaf1c3a9a9ad8d5c156136e3fa6c64cf0cf908e63d34134c334c4150980
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.