# Devx UX

> Activate when designing or modifying CLI command surfaces, command help text, install/init/run flows, error wording, or first-run experience in the APM CLI -- even when the user does not say "UX" explicitly.

- Skill: `mvanhorn/devx-ux` (Agent Skill)
- Install (CLI): `npx skillmds@latest add mvanhorn/devx-ux`
- Raw SKILL.md: https://api.skillmd.com/api/skills/mvanhorn/devx-ux/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: mvanhorn (https://skillmd.com/u/mvanhorn)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/mvanhorn/devx-ux

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# Developer Tooling UX Skill

[Developer Tooling UX expert persona](../../agents/devx-ux-expert.agent.md)

## When to activate

- Changes to `src/apm_cli/cli.py` or any Click command definition
- New / renamed commands, subcommands, flags, or positional args
- Help strings (`help=`) and command docstrings
- Error messages that the user reads (not internal exceptions)
- `apm init`, `apm install`, `apm run`, `apm compile`, `apm preview`,
  `apm list`, `apm deps` flow changes
- README quickstart edits that change the first-run path

## Key rules

- Compare every flow against `npm` / `pip` / `cargo` / `gh` mental
  models -- justify any deviation.
- Default output is for humans; `--verbose` is for agents.
- Every error names the failure, the cause, and one next action.
- Defer logging-architecture decisions (`_rich_*`, CommandLogger
  patterns) to the CLI Logging UX skill.