skill-posidoni-shell-skill-posix-sh · by Install
$ agentstack add skill-posidoni-shell-skill-posix-sh Open-source listing, not yet scanned by AgentStack. Follow the source repository for install instructions.
Security review
⚠ Flagged1 finding(s); flagged for manual review. · v0.1.0 How review works →
- • Prompt-injection patterns
- • Secret / credential exfiltration
- • Dangerous shell & filesystem operations
- • Untrusted network calls
- • Known-malicious package signatures
- high Pipes remote content directly into a shell (remote code execution).
What it can access
- ● Network access Used
- ✓ Filesystem access No
- ✓ Shell / process execution No
- ✓ Environment & secrets No
- ✓ Dynamic code execution No
From automated source analysis of v0.1.0. “Used” means the capability is present in the source — more access means more to trust, not that it’s unsafe.
Reliability & compatibility
Declared compatibility
Compatibility is declared by the source manifest. End-to-end runtime verification is coming, see below.
We're building live execution health for every listing: tool-call success rate, median latency, uptime, and last-checked timestamps, measured, not self-reported. It isn't live yet, so we don't show numbers we can't stand behind.
How agent discovery & health will work →About
POSIX sh
Builds on [skills/shell-standards](../shell-standards/). Depth and citations in [reference/posix-sh.md](../../reference/posix-sh.md); runnable pairs in [examples/posix-sh/](../../examples/posix-sh/).
Key points
| Topic | Do | Avoid | |-------|----|-------| | Strict mode | set -eu | set -o pipefail (not POSIX) | | Function-local state | capture via $( ), which already subshells | local (SC3043) | | Lists | set -- ... / "$@" | arr=(...) (SC3030/SC3054) | | Conditionals | [ "$x" = y ] | [[ $x == y ]] (SC3010) | | Sourcing | . ./lib.sh | source ./lib.sh (SC3046) | | Functions | name() { ...; } | function name { ...; } (SC3045) |
Why this matters
/bin/sh is dash on Debian/Ubuntu, not bash — and most container base images, install scripts (curl | sh), and anything with a literal #!/bin/sh shebang run under a real POSIX shell with none of Bash's extensions. Code that only ran under bash in development can fail — or silently misbehave — the first time it runs as /bin/sh.
Verify
shellcheck infers the POSIX dialect automatically from a #!/bin/sh shebang (SC3xxx codes only fire there). task ci runs both ShellCheck and shfmt over [examples/posix-sh/](../../examples/posix-sh/); note that *.bad.sh files there are excluded from the shfmt gate because some anti-patterns (arrays) are invalid POSIX syntax, not just bad style — shfmt cannot parse them in POSIX mode at all.
Source & license
This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.
- Author: posidoni
- Source: posidoni/shell-skill
- License: MIT
Install and usage instructions live in the source repository linked above.
Reviews
No reviews yet, be the first.
Write a review
Versions
- v0.1.0 Imported from the upstream source.