fish-shell-scripting SKILL.md skillA
fish-shell-scripting from pyroxin/opinionated-claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add pyroxin/opinionated-claude-skills/fish-shell-scripting@git:20251129.c7223eePins git:20251129.c7223ee in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- pyroxin/opinionated-claude-skills
- Path
opinionated-fish-shell/skills/fish-shell-scripting/SKILL.md- Versions recorded
- 1
- Latest version
- git:20251129.c7223ee, committed Nov 29, 2025
- Size
- 10,240 bytes
- Repository stars
- 9
- License
- EPL-2.0
Fish shell scripting judgment frameworks and critical idioms. Use when writing Fish scripts or shell automation. Focuses on when to use Fish vs bash, macOS/Fedora compatibility requirements, and Fish-specific patterns that prevent bugs (universal variable anti-patterns, wrapper functions, interactive guards).
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
# Fish Shell Scripting **Related skills:** - `software-engineer` - General scripting design principles - `python-programmer` - When shell complexity exceeds ~100 lines, consider Python <core_philosophy> **Fish is a user-friendly shell that prioritizes correctness over POSIX compatibility.** Its lists-not-strings semantics eliminates entire classes of bugs common in bash/zsh. The limitation is portability, not capability. **Key insight**: Fish handles sophisticated automation well. Choose Fish when you control the environment; choose bash when you don't. </core_philosophy> ## Platform Requirements <platform_requirements> **Compatibility**: All Fish scripts MUST work on both macOS and Fedora Linux. Handle platform differences via `uname` detection. **Quote paths with spaces**: Always quote file paths even though Fish has no word splitting. Fish doesn't need quotes technically (no word splitting), but quoting anyway: (1) makes intent explicit for readability, (2) builds consistent habits when switching between shells, (3) ensures compatibility when passing to external commands that may interpret spaces. …
Read the whole file at its exact version.
How to install
mdr add pyroxin/opinionated-claude-skills/fish-shell-scripting@sha256:6741ecdecedfd184The line at the top of this page pins the label git:20251129.c7223ee, 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_j5qoh7yfhax6rvrc)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Nov 29, 2025.
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 (10240 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
pyroxin/opinionated-claude-skills · 9 stars · license EPL-2.0 · pushed 2026-10-13 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_j5qoh7yfhax6rvrc GET https://markdownregistry.com/api/v1/resolve?ref=pyroxin/opinionated-claude-skills/fish-shell-scripting GET https://markdownregistry.com/api/v1/blob/6741ecdecedfd184e77a7607e382dbc1912b9f68e0d83c3bfdfe845895c7490c
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.