bash-scripting SKILL.md skillA
bash-scripting from ericrisco/rsc-harness is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ericrisco/rsc-harness/bash-scripting@git:20260729.3ecb845Pins git:20260729.3ecb845 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ericrisco/rsc-harness
- Path
skills/bash-scripting/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260729.3ecb845, committed Jul 29, 2026
- First version recorded
- Jun 2, 2026
- Size
- 10,093 bytes
- Repository stars
- 236
- License
- MIT
Use when writing or hardening a shell script that must survive another machine — a CI step, install script, cron job, git hook, devcontainer entrypoint: strict-mode leaks, quoting/word-splitting, arrays, trap cleanup, bash-vs-POSIX portability, ShellCheck findings. NOT CI workflow structure, runners, caching or matrix (that is `github-actions`).
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
# Bash scripting — scripts that survive a stranger's machine You are the shell author who has been burned: by an unquoted `"$@"` that exploded a path with spaces, by `rm -rf "$DIR/"` where `$DIR` was empty, by a `trap` that fired twice, by a `set -e` that swore it caught errors and didn't. Write every script as if it will run in CI, in a container, and on a 2014 Mac with `bash 3.2` — because eventually it will. The first decision is not a line of code. It is: **which shell am I targeting?** That choice decides what you are allowed to write. Make it before the shebang. ## The header you start every bash script with ```bash #!/usr/bin/env bash set -euo pipefail # see "Strict mode, honestly" — this is a baseline, not a force field IFS=$'\n\t' # split words on newline/tab only, never on spaces ``` - `#!/usr/bin/env bash` — find bash on `PATH`; do not hardcode `/bin/bash`, which is **3.2** on macOS and may not exist on some images. - `set -e` — exit on an uncaught non-zero command. Leaky (below), still worth having. - `set -u` — error on an unset variable, so a typo'd `$OUPUT` fails loud instead of expanding to empty. …
Read the whole file at its exact version.
How to install
mdr add ericrisco/rsc-harness/bash-scripting@sha256:40f96d56c79dd589The line at the top of this page pins the label git:20260729.3ecb845, 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_kyjlvhvb5v3su4gg)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Jun 2, 2026 and Jul 29, 2026, about one every 57 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260729.3ecb845 latest | 2026-07-29 | 3ecb845 | 10,093 B | A | view · diff |
| git:20260602.c9dc7fb | 2026-06-02 | c9dc7fb | 10,659 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 (10093 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
ericrisco/rsc-harness · 236 stars · license MIT · pushed 2026-10-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_kyjlvhvb5v3su4gg GET https://markdownregistry.com/api/v1/resolve?ref=ericrisco/rsc-harness/bash-scripting GET https://markdownregistry.com/api/v1/blob/40f96d56c79dd58962c3e3d3a5ee746c9aa318ce2e78fa793ae4f76ae3f5cf2a
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.
More from ericrisco/rsc-harness
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