# Argvskill

> Caller input flows into a fixed-program argv list that is built in a local before the call (cmd = [prog, arg]; subprocess.run(cmd)) — argument injection only, not command injection. B13 FP regression guard for the variable-bound argv form.

- Skill: `gl0di/argvskill-2` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add gl0di/argvskill-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/gl0di/argvskill-2/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: gl0di (https://skillmd.com/u/gl0di)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/gl0di/argvskill-2

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# Variable-Bound Argv List-Form Skill

Builds the command list in a local variable, then passes it by name to
`subprocess.run` with `shell=False` (default). The tainted value is a non-program
argv element and the interpreter is a fixed literal, so shell metacharacters are
literal argv data — argument injection, not command injection. The list variable name
is reused across two functions to mirror the real-world pattern; scope-aware resolution
must not conflate them. This must not be a CRITICAL vet failure.