reinforcement-learning SKILL.md skillA
reinforcement-learning from aznatkoiny/zai-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add aznatkoiny/zai-skills/reinforcement-learning@git:20261010.5b03da5Pins git:20261010.5b03da5 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- aznatkoiny/zai-skills
- Path
AI-Toolkit/skills/reinforcement-learning/SKILL.md- Versions recorded
- 4
- Latest version
- git:20261010.5b03da5, committed Oct 10, 2026
- First version recorded
- Feb 13, 2026
- Size
- 9,257 bytes
- Repository stars
- 10
- License
- MIT
Reinforcement learning in Python with Gymnasium and Stable-Baselines3 (PPO, SAC, DQN, TD3, A2C). Use when the user is building a custom Gymnasium environment, choosing an algorithm, training or tuning an agent, debugging an agent that won't learn (flat reward, collapse, NaNs), evaluating a policy, or exporting one to ONNX. Includes runnable scripts that validate an environment, sanity-check it before training, and write an evaluation report. Not for RL in C++/libtorch…
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
# Reinforcement learning (Python) Help the user get an agent that actually learns, and show that it did. Most RL failures come from the environment and the setup (observation scale, reward design, termination flags, evaluation mistakes) rather than from the algorithm, so check those before reaching for exotic fixes. The ecosystem moves: Gymnasium 1.x replaced OpenAI Gym, and SB3 changes defaults between releases. Before writing code against a specific API, check what the user has installed (`pip show gymnasium stable-baselines3`) and match it. If a web or docs tool is available, look up any API you're unsure of rather than relying on the snippets here. Current as of October 2026: Gymnasium 1.4, Stable-Baselines3 2.9 (Gymnasium 1.x support needs SB3 2.4 or later). ## Choosing a library and algorithm Stable-Baselines3 is the default here: reliable implementations, good defaults, and the bundled scripts target it. CleanRL suits users who want to read and modify a single-file implementation; TorchRL suits custom research algorithms. For distributed training at scale, Ray RLlib is the usual choice, but this skill doesn't cover it. | Situation | Start with | Why | |---|---|---| …
Read the whole file at its exact version.
How to install
mdr add aznatkoiny/zai-skills/reinforcement-learning@sha256:0f49320bce387ab5The line at the top of this page pins the label git:20261010.5b03da5, 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_lmrnlfoptlgmqhkz)
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Versions
The registry has recorded 4 versions of this file, between Feb 13, 2026 and Oct 10, 2026, about one every 79 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261010.5b03da5 latest | 2026-10-10 | 5b03da5 | 9,257 B | A | view · diff |
| git:20260726.6924f8d | 2026-07-26 | 6924f8d | 8,489 B | A | view · diff |
| git:20260726.901d869 | 2026-07-26 | 901d869 | 6,919 B | A | view · diff |
| git:20260213.9792cea | 2026-02-13 | 9792cea | 6,886 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 (9257 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
aznatkoiny/zai-skills · 10 stars · license MIT · pushed 2026-11-07 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_lmrnlfoptlgmqhkz GET https://markdownregistry.com/api/v1/resolve?ref=aznatkoiny/zai-skills/reinforcement-learning GET https://markdownregistry.com/api/v1/blob/0f49320bce387ab50b670d38b34a83974d898f7cbe96ee2526dea59ba200001d
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.