shell-scripts SKILL.md skillA
shell-scripts from ahgraber/skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ahgraber/skills/shell-scripts@git:20260819.209d97bPins git:20260819.209d97b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ahgraber/skills
- Path
skills/shell-scripts/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260819.209d97b, committed Aug 19, 2026
- First version recorded
- Feb 10, 2026
- Size
- 3,423 bytes
- Repository stars
- 6
- License
- CC0-1.0
Use when writing or reviewing Bash scripts and shell snippets, especially for shebang selection, quoting, parameter expansion ("${VAR}" style), test expressions (`[ ]` vs `[[ ]]`), ShellCheck-guided fixes, and portability decisions across POSIX sh, Bash, and zsh compatibility targets.
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
# Writing Shell Scripts ## Overview Write shell code with an explicit portability target first, then apply strict quoting and a bounded ShellCheck remediation loop. Default to Bash readability and safety; switch to POSIX-only mode when the user asks for strict portability. ## When to Use - Creating or refactoring Bash scripts. - Reviewing shell snippets for correctness and safety. - Standardizing shebangs, quoting, variable expansion style, and test syntax. - Deciding between POSIX-compliant syntax and Bash-specific features. - Improving compatibility with zsh environments. **When NOT to use:** - The task is strictly `fish`, `powershell`, or Windows batch. - The user explicitly wants pure POSIX `sh` and no Bash features (use POSIX mode from `references/compatibility-matrix.md`). ## Invocation Notice - Tell the user when this skill is running: `shell-scripts`. Skip the notice when the user asked for the skill by name or slash command; spelling and spacing need not match. A phrase from this skill's own trigger list is not a name — naming the work is not naming the skill. ## Workflow 1. Select the target mode from `references/compatibility-matrix.md`: …
Read the whole file at its exact version.
How to install
mdr add ahgraber/skills/shell-scripts@sha256:5f86227cf165feddThe line at the top of this page pins the label git:20260819.209d97b, 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_m5dasg6pveyb2pgn)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Feb 10, 2026 and Aug 19, 2026, about one every 63 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260819.209d97b latest | 2026-08-19 | 209d97b | 3,423 B | A | view · diff |
| git:20260728.79ff2f8 | 2026-07-28 | 79ff2f8 | 3,219 B | A | view · diff |
| git:20260322.5886679 | 2026-03-22 | 5886679 | 3,215 B | A | view · diff |
| git:20260210.6517789 | 2026-02-10 | 6517789 | 3,210 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 (3423 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
ahgraber/skills · 6 stars · license CC0-1.0 · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_m5dasg6pveyb2pgn GET https://markdownregistry.com/api/v1/resolve?ref=ahgraber/skills/shell-scripts GET https://markdownregistry.com/api/v1/blob/5f86227cf165fedd25da0a6d6a6e2b04f1f121bdee66431545dbbea461f29d6b
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.