ReddRadar
Agent skill
typer-and-rich
Use when building Typer/Rich CLI applications or reviewing existing CLI code for correctness. Activates on requests involving Rich table rendering, console output handling, testing Rich-formatted output, or Typer command wiring. Prevents common AI mistakes — Rich table wrapping in non-TTY contexts, incorrect stderr/stdout separation, and integration pitfalls. Load alongside the typer and rich API reference skills.
Install this agent skill to your Project
npx add-skill https://github.com/Jamie-BitFlight/claude_skills/tree/main/plugins/python3-development/skills/typer-and-rich
SKILL.md
Typer and Rich Best Practices
<user_input>$ARGUMENTS</user_input> If <user_input/> contains a directory or file then that is what should be examines against this guide specifically. Start immediately. If its empty, then use this as a reference for existing tasks.
Correctness patterns for building CLI applications with Typer and Rich, focused on non-TTY environments and common failure modes. For API reference, load the dedicated skills:
Skill(skill="python3-development:typer")— Typer CLI framework API referenceSkill(skill="python3-development:rich")— Rich terminal UI API reference
Non-TTY and Programmatic Usage
Consult ../python3-development/references/python3-standards.md when applying shared architecture, typing, testing, or CLI rules; full standards, graphs, and amendment process are documented there.
See references/non-tty-patterns.md — Console behavior without TTY, width defaults, force_terminal vs width, Progress/Live in non-interactive contexts, environment variables.
Rich Table Width Measurement
See references/rich-tables.md — width measurement pattern that prevents wrapping at 80 columns in non-TTY output.
Testing Patterns
See references/testing-patterns.md — capturing Rich output in pytest, CliRunner with Rich, snapshot testing, common assertion mistakes.
Exception Chain Prevention
See references/exception-handling.md — Typer exception chain prevention with AppExit and AppExitRich patterns. Read when implementing error handling in Typer CLI applications.
Working Script Examples
See assets/typer_examples/index.md — working scripts demonstrating non-TTY display solutions. Read when troubleshooting display and layout of terminal applications.
See assets/python-cli-demo.py — complete working CLI demo with all patterns (PEP 723 shebang, Typer + Rich integration, modern Python 3.11+, async processing). Read when creating a new CLI tool as a reference implementation.
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