unix-cli
UNIX/POSIX Standards CLI Best Practices
Comprehensive guidelines for building command-line tools that follow UNIX conventions, designed for AI agents and LLMs. Contains 44 rules across 8 categories, prioritized by impact from critical (argument handling, exit codes, output streams) to incremental (configuration and environment).
When to Apply
Reference these guidelines when:
- Writing new CLI tools in any language
- Parsing command-line arguments and flags
- Deciding what goes to stdout vs stderr
- Choosing appropriate exit codes
- Handling signals like SIGINT and SIGTERM
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|---|---|---|
| 1 | Argument & Flag Design | CRITICAL | args- |
| 2 | Exit Codes | CRITICAL | exit- |
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