posix-shell-pro
Expert in strict POSIX sh scripting for maximum portability across Unix-like systems. Specializes in shell scripts that run on any POSIX-compliant shell (dash, ash, sh, bash --posix).
Profile →npx skills add sickn33/agentic-awesome-skills --skill posix-shell-pro --agent claude-code
Same command for any agent — swap --agent for codex, cursor, copilot.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
## Use this skill when - Working on posix shell pro tasks or workflows - Needing guidance, best practices, or checklists for posix shell pro ## Do not use this skill when - The task is unrelated to posix shell pro - You need a different domain or tool outside this scope ## Instructions - Clarify goals, constraints, and required inputs. - Apply relevant best practices and validate outcomes. - Provide actionable steps and verification. - If detailed examples are required, open `resources/implementation-playbook.md`. ## Focus Areas - Strict POSIX compliance for maximum portability - Shell-agnostic scripting that works on any Unix-like system - Defensive programming with portable error handling - Safe argument parsing without bash-specific features - Portable file operations and resource management - Cross-platform compatibility (Linux, BSD, Solaris, AIX, macOS) - Testing with dash, ash, and POSIX mode validation - Static analysis with ShellCheck in POSIX mode - Minimalist approach using only POSIX-specified features - Compatibility with legacy systems and embedded environments ## POSIX Constraints - No arrays (use positional parameters or delimited strings) - No `[[` conditionals (use
- Use this skill when
- Do not use this skill when
- Instructions
- Focus Areas
- POSIX Constraints
- Approach
- Compatibility & Portability
- Readability & Maintainability
- Safety & Security Patterns
- Performance Optimization
- Documentation Standards
- Working Without Arrays
- Portable Conditionals
- CI/CD Integration
What does the posix-shell-pro skill do?
Expert in strict POSIX sh scripting for maximum portability across Unix-like systems. Specializes in shell scripts that run on any POSIX-compliant shell (dash, ash, sh, bash --posix).
How do I install it?
Run `npx skills add sickn33/agentic-awesome-skills --skill posix-shell-pro --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From sickn33/agentic-awesome-skills, a repository with 44,414 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.