niubash SKILL.md skillA
niubash from unixwin/niubash is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add unixwin/niubash/niubash@git:20261103.f5fad1dPins git:20261103.f5fad1d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- unixwin/niubash
- Path
skills/niubash/SKILL.md- Versions recorded
- 11
- Latest version
- git:20261103.f5fad1d, committed Nov 3, 2026
- First version recorded
- Oct 19, 2026
- Size
- 13,179 bytes
- Repository stars
- 228
- License
- MIT
Run Windows tasks in Niubash, the GNU Bash-compatible Windows-native shell. Use when the active shell is Niubash (the `niu` prompt), when editing ~/.niubashrc or the external plugin manifest, when installing Unix commands with wpm, or for any Windows task where bash syntax should run natively — no PowerShell, WSL, Git Bash, or MSYS involved, and no path-conversion environment variables required.
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
# Niubash ## Identity — a bash dialect, not a POSIX machine Niubash is bash implemented natively in Rust for Windows: the language engine ([rubash](https://github.com/unixwin/rubash)) is a from-scratch Bash interpreter gated on GNU Bash's own upstream test suite — **all 83 suites pass on the 2026-10-12 full re-run: 62 byte-identical stdout on Windows, 20 environment-attributed, and the nameref suite's single residual line proven to be GNU Bash's own coproc reap-timing race** (ledger in rubash's [README, "Compatibility at a Glance"](https://github.com/unixwin/rubash#compatibility-at-a-glance)). What it is not matters as much: - **No POSIX emulation layer on Windows.** The Windows stack carries no `cygwin1.dll`/`msys-2.0.dll`, no fork, no POSIX signal delivery, **no PTY emulation** — job control and terminal handling ride on Win32/ConPTY. Interactive fullscreen TUI programs built for a POSIX pty (and pty-only tools like `script`/`ssh -t`) are the known rough edge, not path or quoting behavior. - **No MSYS path rules.** The Windows-native path is the first-class internal representation; `/c/...`, `/mnt/c/...`, `/usr/bin`, `/tmp` are …
Read the whole file at its exact version.
How to install
mdr add unixwin/niubash/niubash@sha256:3e70504ab641315fThe line at the top of this page pins the label git:20261103.f5fad1d, 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_oucxtjjorrgmpza7)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 11 versions of this file, between Oct 19, 2026 and Nov 3, 2026, about one every day.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261103.f5fad1d latest | 2026-11-03 | f5fad1d | 13,179 B | A | view · diff |
| git:20261101.903e13d | 2026-11-01 | 903e13d | 13,179 B | A | view · diff |
| git:20261101.df29ee4 | 2026-11-01 | df29ee4 | 13,117 B | A | view · diff |
| git:20261101.28ed4c1 | 2026-11-01 | 28ed4c1 | 12,877 B | A | view · diff |
| git:20261101.cf05021 | 2026-11-01 | cf05021 | 12,606 B | A | view · diff |
| git:20261031.e9b575f | 2026-10-31 | e9b575f | 12,562 B | A | view · diff |
| git:20261022.5607b41 | 2026-10-22 | 5607b41 | 11,583 B | A | view · diff |
| git:20261022.4815207 | 2026-10-22 | 4815207 | 11,583 B | A | view · diff |
| git:20261021.3a58357 | 2026-10-21 | 3a58357 | 8,658 B | A | view · diff |
| git:20261020.7799ef7 | 2026-10-20 | 7799ef7 | 8,658 B | A | view · diff |
| git:20261019.e478254 | 2026-10-19 | e478254 | 8,658 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 (13179 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
unixwin/niubash · 228 stars · license MIT · pushed 2026-11-06 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_oucxtjjorrgmpza7 GET https://markdownregistry.com/api/v1/resolve?ref=unixwin/niubash/niubash GET https://markdownregistry.com/api/v1/blob/3e70504ab641315f76bbbb79ac5ae9297b6fcdae5b397a6718ef595b9e27ac37
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.