shell-scripting SKILL.md skillA
shell-scripting from xobotyi/cc-foundry is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add xobotyi/cc-foundry/shell-scripting@git:20260823.869f02bPins git:20260823.869f02b in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- xobotyi/cc-foundry
- Path
plugins/cli/skills/shell-scripting/SKILL.md- Versions recorded
- 5
- Latest version
- git:20260823.869f02b, committed Aug 23, 2026
- First version recorded
- Feb 20, 2026
- Size
- 12,909 bytes
- Repository stars
- 23
- License
- MIT
Shell script conventions, defensive patterns, and correctness rules: strict mode, quoting, portability, error handling, and common pitfalls. Invoke whenever task involves any interaction with shell scripts — writing, reviewing, debugging, or understanding .sh, .bash, .zsh files.
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
# Shell Scripting
Write defensively. Shell defaults are hostile — unquoted variables split, unset variables vanish silently, failed
commands continue. Every rule here exists to counteract a specific shell default that causes bugs.
## References
Extended examples, code patterns, and lookup tables for the rules below.
- **Strict mode, error handling, traps, debugging** — [`${CLAUDE_SKILL_DIR}/references/strict-mode.md`]: errexit
caveats, pipefail examples, trap patterns, temp file safety, debugging techniques
- **Quoting rules, word splitting, globbing** — [`${CLAUDE_SKILL_DIR}/references/quoting.md`]: Three quoting mechanisms,
`"$@"` vs `"$*"`, array expansion, printf vs echo, nested quoting
- **POSIX sh vs bash, portable constructs** — [`${CLAUDE_SKILL_DIR}/references/portability.md`]: Feature comparison, GNU
vs BSD tool differences, portable pattern catalog
- **Argument parsing, getopts, validation** — [`${CLAUDE_SKILL_DIR}/references/arguments.md`]: getopts template, manual
long-option parsing, validation patterns, usage messages, stdin detection
- **Common shell scripting mistakes** — [`${CLAUDE_SKILL_DIR}/references/pitfalls.md`]: Iteration pitfalls, variable
…Read the whole file at its exact version.
How to install
mdr add xobotyi/cc-foundry/shell-scripting@sha256:9b2d21f22eb9857bThe line at the top of this page pins the label git:20260823.869f02b, 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_rosro7gb52sky2l7)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Feb 20, 2026 and Aug 23, 2026, about one every 46 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260823.869f02b latest | 2026-08-23 | 869f02b | 12,909 B | A | view · diff |
| git:20260314.9629b35 | 2026-03-14 | 9629b35 | 12,827 B | A | view · diff |
| git:20260313.02a8e7c | 2026-03-13 | 02a8e7c | 13,319 B | A | view · diff |
| git:20260305.a08fbb4 | 2026-03-05 | a08fbb4 | 12,939 B | A | view · diff |
| git:20260220.a5f5b04 | 2026-02-20 | a5f5b04 | 12,819 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 (12909 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
xobotyi/cc-foundry · 23 stars · license MIT · pushed 2026-10-31 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_rosro7gb52sky2l7 GET https://markdownregistry.com/api/v1/resolve?ref=xobotyi/cc-foundry/shell-scripting GET https://markdownregistry.com/api/v1/blob/9b2d21f22eb9857bed2d891e0f9e501d53bffb930d4668d703e4bc7ccfd3dff0
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 xobotyi/cc-foundry
Every file in xobotyi/cc-foundry